[yocto] [meta-security][PATCH 1/2] ccs-patch: Add ccs kernel patches
Armin Kuster
akuster808 at gmail.com
Sun Oct 25 21:22:55 PDT 2015
add 4.1 kernel support for css
Signed-off-by: Armin Kuster <akuster808 at gmail.com>
---
.../linux/linux-yocto-4.1/ccs-patch-4.1.diff | 968 +
.../linux-yocto-4.1/ccs-tools-yocto.4.1.patch | 1029 ++
.../linux-yocto-4.1/ccs-tools-yocto_security.patch | 17920 +++++++++++++++++++
recipes-kernel/linux/linux-yocto-4.1/tomoyo.cfg | 16 +
recipes-kernel/linux/linux-yocto-4.1/tomoyo.scc | 4 +
recipes-kernel/linux/linux-yocto_4.1.bbappend | 9 +
6 files changed, 19946 insertions(+)
create mode 100644 recipes-kernel/linux/linux-yocto-4.1/ccs-patch-4.1.diff
create mode 100644 recipes-kernel/linux/linux-yocto-4.1/ccs-tools-yocto.4.1.patch
create mode 100644 recipes-kernel/linux/linux-yocto-4.1/ccs-tools-yocto_security.patch
create mode 100644 recipes-kernel/linux/linux-yocto-4.1/tomoyo.cfg
create mode 100644 recipes-kernel/linux/linux-yocto-4.1/tomoyo.scc
create mode 100644 recipes-kernel/linux/linux-yocto_4.1.bbappend
diff --git a/recipes-kernel/linux/linux-yocto-4.1/ccs-patch-4.1.diff b/recipes-kernel/linux/linux-yocto-4.1/ccs-patch-4.1.diff
new file mode 100644
index 0000000..9ad49fd
--- /dev/null
+++ b/recipes-kernel/linux/linux-yocto-4.1/ccs-patch-4.1.diff
@@ -0,0 +1,968 @@
+This is TOMOYO Linux patch for kernel 4.1.8.
+
+Source code for this patch is https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.1.8.tar.xz
+---
+ fs/exec.c | 2
+ fs/open.c | 2
+ fs/proc/version.c | 7 ++
+ include/linux/init_task.h | 9 +++
+ include/linux/sched.h | 6 ++
+ include/linux/security.h | 62 +++++++++++++++----------
+ include/net/ip.h | 4 +
+ kernel/fork.c | 5 ++
+ kernel/kexec.c | 3 +
+ kernel/module.c | 5 ++
+ kernel/ptrace.c | 10 ++++
+ kernel/reboot.c | 3 +
+ kernel/sched/core.c | 2
+ kernel/signal.c | 10 ++++
+ kernel/sys.c | 8 +++
+ kernel/time/ntp.c | 8 +++
+ net/ipv4/raw.c | 4 +
+ net/ipv4/udp.c | 4 +
+ net/ipv6/raw.c | 4 +
+ net/ipv6/udp.c | 4 +
+ net/socket.c | 4 +
+ net/unix/af_unix.c | 4 +
+ security/Kconfig | 2
+ security/Makefile | 3 +
+ security/security.c | 110 ++++++++++++++++++++++++++++++++++++++++------
+ 25 files changed, 248 insertions(+), 37 deletions(-)
+
+--- linux-4.1.8.orig/fs/exec.c
++++ linux-4.1.8/fs/exec.c
+@@ -1461,7 +1461,7 @@ static int exec_binprm(struct linux_binp
+ old_vpid = task_pid_nr_ns(current, task_active_pid_ns(current->parent));
+ rcu_read_unlock();
+
+- ret = search_binary_handler(bprm);
++ ret = ccs_search_binary_handler(bprm);
+ if (ret >= 0) {
+ audit_bprm(bprm);
+ trace_sched_process_exec(current, old_pid, bprm);
+--- linux-4.1.8.orig/fs/open.c
++++ linux-4.1.8/fs/open.c
+@@ -1106,6 +1106,8 @@ EXPORT_SYMBOL(sys_close);
+ */
+ SYSCALL_DEFINE0(vhangup)
+ {
++ if (!ccs_capable(CCS_SYS_VHANGUP))
++ return -EPERM;
+ if (capable(CAP_SYS_TTY_CONFIG)) {
+ tty_vhangup_self();
+ return 0;
+--- linux-4.1.8.orig/fs/proc/version.c
++++ linux-4.1.8/fs/proc/version.c
+@@ -32,3 +32,10 @@ static int __init proc_version_init(void
+ return 0;
+ }
+ fs_initcall(proc_version_init);
++
++static int __init ccs_show_version(void)
++{
++ printk(KERN_INFO "Hook version: 4.1.8 2015/09/26\n");
++ return 0;
++}
++fs_initcall(ccs_show_version);
+--- linux-4.1.8.orig/include/linux/init_task.h
++++ linux-4.1.8/include/linux/init_task.h
+@@ -182,6 +182,14 @@ extern struct task_group root_task_group
+ # define INIT_KASAN(tsk)
+ #endif
+
++#if defined(CONFIG_CCSECURITY) && !defined(CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY)
++#define INIT_CCSECURITY \
++ .ccs_domain_info = NULL, \
++ .ccs_flags = 0,
++#else
++#define INIT_CCSECURITY
++#endif
++
+ /*
+ * INIT_TASK is used to set up the first task table, touch at
+ * your own risk!. Base=0, limit=0x1fffff (=2MB)
+@@ -258,6 +266,7 @@ extern struct task_group root_task_group
+ INIT_VTIME(tsk) \
+ INIT_NUMA_BALANCING(tsk) \
+ INIT_KASAN(tsk) \
++ INIT_CCSECURITY \
+ }
+
+
+--- linux-4.1.8.orig/include/linux/sched.h
++++ linux-4.1.8/include/linux/sched.h
+@@ -6,6 +6,8 @@
+ #include <linux/sched/prio.h>
+
+
++struct ccs_domain_info;
++
+ struct sched_param {
+ int sched_priority;
+ };
+@@ -1724,6 +1726,10 @@ struct task_struct {
+ #ifdef CONFIG_DEBUG_ATOMIC_SLEEP
+ unsigned long task_state_change;
+ #endif
++#if defined(CONFIG_CCSECURITY) && !defined(CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY)
++ struct ccs_domain_info *ccs_domain_info;
++ u32 ccs_flags;
++#endif
+ };
+
+ /* Future-safe accessor for struct task_struct's cpus_allowed. */
+--- linux-4.1.8.orig/include/linux/security.h
++++ linux-4.1.8/include/linux/security.h
+@@ -53,6 +53,7 @@ struct msg_queue;
+ struct xattr;
+ struct xfrm_sec_ctx;
+ struct mm_struct;
++#include <linux/ccsecurity.h>
+
+ /* Maximum number of letters for an LSM name string */
+ #define SECURITY_NAME_MAX 10
+@@ -2042,7 +2043,10 @@ static inline int security_syslog(int ty
+ static inline int security_settime(const struct timespec *ts,
+ const struct timezone *tz)
+ {
+- return cap_settime(ts, tz);
++ int error = cap_settime(ts, tz);
++ if (!error)
++ error = ccs_settime(ts, tz);
++ return error;
+ }
+
+ static inline int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
+@@ -2111,18 +2115,18 @@ static inline int security_sb_mount(cons
+ const char *type, unsigned long flags,
+ void *data)
+ {
+- return 0;
++ return ccs_sb_mount(dev_name, path, type, flags, data);
+ }
+
+ static inline int security_sb_umount(struct vfsmount *mnt, int flags)
+ {
+- return 0;
++ return ccs_sb_umount(mnt, flags);
+ }
+
+ static inline int security_sb_pivotroot(struct path *old_path,
+ struct path *new_path)
+ {
+- return 0;
++ return ccs_sb_pivotroot(old_path, new_path);
+ }
+
+ static inline int security_sb_set_mnt_opts(struct super_block *sb,
+@@ -2260,7 +2264,7 @@ static inline int security_inode_setattr
+
+ static inline int security_inode_getattr(const struct path *path)
+ {
+- return 0;
++ return ccs_inode_getattr(path);
+ }
+
+ static inline int security_inode_setxattr(struct dentry *dentry,
+@@ -2336,7 +2340,7 @@ static inline void security_file_free(st
+ static inline int security_file_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+ {
+- return 0;
++ return ccs_file_ioctl(file, cmd, arg);
+ }
+
+ static inline int security_mmap_file(struct file *file, unsigned long prot,
+@@ -2365,7 +2369,7 @@ static inline int security_file_lock(str
+ static inline int security_file_fcntl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+ {
+- return 0;
++ return ccs_file_fcntl(file, cmd, arg);
+ }
+
+ static inline void security_file_set_fowner(struct file *file)
+@@ -2388,7 +2392,7 @@ static inline int security_file_receive(
+ static inline int security_file_open(struct file *file,
+ const struct cred *cred)
+ {
+- return 0;
++ return ccs_file_open(file, cred);
+ }
+
+ static inline int security_task_create(unsigned long clone_flags)
+@@ -2750,7 +2754,7 @@ static inline int security_unix_may_send
+ static inline int security_socket_create(int family, int type,
+ int protocol, int kern)
+ {
+- return 0;
++ return ccs_socket_create(family, type, protocol, kern);
+ }
+
+ static inline int security_socket_post_create(struct socket *sock,
+@@ -2765,19 +2769,19 @@ static inline int security_socket_bind(s
+ struct sockaddr *address,
+ int addrlen)
+ {
+- return 0;
++ return ccs_socket_bind(sock, address, addrlen);
+ }
+
+ static inline int security_socket_connect(struct socket *sock,
+ struct sockaddr *address,
+ int addrlen)
+ {
+- return 0;
++ return ccs_socket_connect(sock, address, addrlen);
+ }
+
+ static inline int security_socket_listen(struct socket *sock, int backlog)
+ {
+- return 0;
++ return ccs_socket_listen(sock, backlog);
+ }
+
+ static inline int security_socket_accept(struct socket *sock,
+@@ -2789,7 +2793,7 @@ static inline int security_socket_accept
+ static inline int security_socket_sendmsg(struct socket *sock,
+ struct msghdr *msg, int size)
+ {
+- return 0;
++ return ccs_socket_sendmsg(sock, msg, size);
+ }
+
+ static inline int security_socket_recvmsg(struct socket *sock,
+@@ -3031,42 +3035,42 @@ int security_path_chroot(struct path *pa
+ #else /* CONFIG_SECURITY_PATH */
+ static inline int security_path_unlink(struct path *dir, struct dentry *dentry)
+ {
+- return 0;
++ return ccs_path_unlink(dir, dentry);
+ }
+
+ static inline int security_path_mkdir(struct path *dir, struct dentry *dentry,
+ umode_t mode)
+ {
+- return 0;
++ return ccs_path_mkdir(dir, dentry, mode);
+ }
+
+ static inline int security_path_rmdir(struct path *dir, struct dentry *dentry)
+ {
+- return 0;
++ return ccs_path_rmdir(dir, dentry);
+ }
+
+ static inline int security_path_mknod(struct path *dir, struct dentry *dentry,
+ umode_t mode, unsigned int dev)
+ {
+- return 0;
++ return ccs_path_mknod(dir, dentry, mode, dev);
+ }
+
+ static inline int security_path_truncate(struct path *path)
+ {
+- return 0;
++ return ccs_path_truncate(path);
+ }
+
+ static inline int security_path_symlink(struct path *dir, struct dentry *dentry,
+ const char *old_name)
+ {
+- return 0;
++ return ccs_path_symlink(dir, dentry, old_name);
+ }
+
+ static inline int security_path_link(struct dentry *old_dentry,
+ struct path *new_dir,
+ struct dentry *new_dentry)
+ {
+- return 0;
++ return ccs_path_link(old_dentry, new_dir, new_dentry);
+ }
+
+ static inline int security_path_rename(struct path *old_dir,
+@@ -3075,22 +3079,32 @@ static inline int security_path_rename(s
+ struct dentry *new_dentry,
+ unsigned int flags)
+ {
+- return 0;
++ /*
++ * Not using RENAME_EXCHANGE here in order to avoid KABI breakage
++ * by doing "#include <uapi/linux/fs.h>" .
++ */
++ if (flags & (1 << 1)) {
++ int err = ccs_path_rename(new_dir, new_dentry, old_dir,
++ old_dentry);
++ if (err)
++ return err;
++ }
++ return ccs_path_rename(old_dir, old_dentry, new_dir, new_dentry);
+ }
+
+ static inline int security_path_chmod(struct path *path, umode_t mode)
+ {
+- return 0;
++ return ccs_path_chmod(path, mode);
+ }
+
+ static inline int security_path_chown(struct path *path, kuid_t uid, kgid_t gid)
+ {
+- return 0;
++ return ccs_path_chown(path, uid, gid);
+ }
+
+ static inline int security_path_chroot(struct path *path)
+ {
+- return 0;
++ return ccs_path_chroot(path);
+ }
+ #endif /* CONFIG_SECURITY_PATH */
+
+--- linux-4.1.8.orig/include/net/ip.h
++++ linux-4.1.8/include/net/ip.h
+@@ -216,6 +216,8 @@ void inet_get_local_port_range(struct ne
+ #ifdef CONFIG_SYSCTL
+ static inline int inet_is_local_reserved_port(struct net *net, int port)
+ {
++ if (ccs_lport_reserved(port))
++ return 1;
+ if (!net->ipv4.sysctl_local_reserved_ports)
+ return 0;
+ return test_bit(port, net->ipv4.sysctl_local_reserved_ports);
+@@ -229,6 +231,8 @@ static inline bool sysctl_dev_name_is_al
+ #else
+ static inline int inet_is_local_reserved_port(struct net *net, int port)
+ {
++ if (ccs_lport_reserved(port))
++ return 1;
+ return 0;
+ }
+ #endif
+--- linux-4.1.8.orig/kernel/fork.c
++++ linux-4.1.8/kernel/fork.c
+@@ -257,6 +257,7 @@ void __put_task_struct(struct task_struc
+ delayacct_tsk_free(tsk);
+ put_signal_struct(tsk->signal);
+
++ ccs_free_task_security(tsk);
+ if (!profile_handoff_task(tsk))
+ free_task(tsk);
+ }
+@@ -1423,6 +1424,9 @@ static struct task_struct *copy_process(
+ goto bad_fork_cleanup_perf;
+ /* copy all the process information */
+ shm_init_task(p);
++ retval = ccs_alloc_task_security(p);
++ if (retval)
++ goto bad_fork_cleanup_audit;
+ retval = copy_semundo(clone_flags, p);
+ if (retval)
+ goto bad_fork_cleanup_audit;
+@@ -1627,6 +1631,7 @@ bad_fork_cleanup_semundo:
+ exit_sem(p);
+ bad_fork_cleanup_audit:
+ audit_free(p);
++ ccs_free_task_security(p);
+ bad_fork_cleanup_perf:
+ perf_event_free_task(p);
+ bad_fork_cleanup_policy:
+--- linux-4.1.8.orig/kernel/kexec.c
++++ linux-4.1.8/kernel/kexec.c
+@@ -41,6 +41,7 @@
+ #include <asm/uaccess.h>
+ #include <asm/io.h>
+ #include <asm/sections.h>
++#include <linux/ccsecurity.h>
+
+ #include <crypto/hash.h>
+ #include <crypto/sha.h>
+@@ -1245,6 +1246,8 @@ SYSCALL_DEFINE4(kexec_load, unsigned lon
+ /* We only trust the superuser with rebooting the system. */
+ if (!capable(CAP_SYS_BOOT) || kexec_load_disabled)
+ return -EPERM;
++ if (!ccs_capable(CCS_SYS_KEXEC_LOAD))
++ return -EPERM;
+
+ /*
+ * Verify we have a legal set of flags
+--- linux-4.1.8.orig/kernel/module.c
++++ linux-4.1.8/kernel/module.c
+@@ -61,6 +61,7 @@
+ #include <linux/bsearch.h>
+ #include <uapi/linux/module.h>
+ #include "module-internal.h"
++#include <linux/ccsecurity.h>
+
+ #define CREATE_TRACE_POINTS
+ #include <trace/events/module.h>
+@@ -799,6 +800,8 @@ SYSCALL_DEFINE2(delete_module, const cha
+
+ if (!capable(CAP_SYS_MODULE) || modules_disabled)
+ return -EPERM;
++ if (!ccs_capable(CCS_USE_KERNEL_MODULE))
++ return -EPERM;
+
+ if (strncpy_from_user(name, name_user, MODULE_NAME_LEN-1) < 0)
+ return -EFAULT;
+@@ -3155,6 +3158,8 @@ static int may_init_module(void)
+ {
+ if (!capable(CAP_SYS_MODULE) || modules_disabled)
+ return -EPERM;
++ if (!ccs_capable(CCS_USE_KERNEL_MODULE))
++ return -EPERM;
+
+ return 0;
+ }
+--- linux-4.1.8.orig/kernel/ptrace.c
++++ linux-4.1.8/kernel/ptrace.c
+@@ -1034,6 +1034,11 @@ SYSCALL_DEFINE4(ptrace, long, request, l
+ {
+ struct task_struct *child;
+ long ret;
++ {
++ const int rc = ccs_ptrace_permission(request, pid);
++ if (rc)
++ return rc;
++ }
+
+ if (request == PTRACE_TRACEME) {
+ ret = ptrace_traceme();
+@@ -1180,6 +1185,11 @@ COMPAT_SYSCALL_DEFINE4(ptrace, compat_lo
+ {
+ struct task_struct *child;
+ long ret;
++ {
++ const int rc = ccs_ptrace_permission(request, pid);
++ if (rc)
++ return rc;
++ }
+
+ if (request == PTRACE_TRACEME) {
+ ret = ptrace_traceme();
+--- linux-4.1.8.orig/kernel/reboot.c
++++ linux-4.1.8/kernel/reboot.c
+@@ -16,6 +16,7 @@
+ #include <linux/syscalls.h>
+ #include <linux/syscore_ops.h>
+ #include <linux/uaccess.h>
++#include <linux/ccsecurity.h>
+
+ /*
+ * this indicates whether you can reboot with ctrl-alt-del: the default is yes
+@@ -295,6 +296,8 @@ SYSCALL_DEFINE4(reboot, int, magic1, int
+ magic2 != LINUX_REBOOT_MAGIC2B &&
+ magic2 != LINUX_REBOOT_MAGIC2C))
+ return -EINVAL;
++ if (!ccs_capable(CCS_SYS_REBOOT))
++ return -EPERM;
+
+ /*
+ * If pid namespaces are enabled and the current task is in a child
+--- linux-4.1.8.orig/kernel/sched/core.c
++++ linux-4.1.8/kernel/sched/core.c
+@@ -3145,6 +3145,8 @@ int can_nice(const struct task_struct *p
+ SYSCALL_DEFINE1(nice, int, increment)
+ {
+ long nice, retval;
++ if (!ccs_capable(CCS_SYS_NICE))
++ return -EPERM;
+
+ /*
+ * Setpriority might change our priority at the same moment.
+--- linux-4.1.8.orig/kernel/signal.c
++++ linux-4.1.8/kernel/signal.c
+@@ -2901,6 +2901,8 @@ SYSCALL_DEFINE4(rt_sigtimedwait, const s
+ SYSCALL_DEFINE2(kill, pid_t, pid, int, sig)
+ {
+ struct siginfo info;
++ if (ccs_kill_permission(pid, sig))
++ return -EPERM;
+
+ info.si_signo = sig;
+ info.si_errno = 0;
+@@ -2969,6 +2971,8 @@ SYSCALL_DEFINE3(tgkill, pid_t, tgid, pid
+ /* This is only valid for single tasks */
+ if (pid <= 0 || tgid <= 0)
+ return -EINVAL;
++ if (ccs_tgkill_permission(tgid, pid, sig))
++ return -EPERM;
+
+ return do_tkill(tgid, pid, sig);
+ }
+@@ -2985,6 +2989,8 @@ SYSCALL_DEFINE2(tkill, pid_t, pid, int,
+ /* This is only valid for single tasks */
+ if (pid <= 0)
+ return -EINVAL;
++ if (ccs_tkill_permission(pid, sig))
++ return -EPERM;
+
+ return do_tkill(0, pid, sig);
+ }
+@@ -2999,6 +3005,8 @@ static int do_rt_sigqueueinfo(pid_t pid,
+ return -EPERM;
+
+ info->si_signo = sig;
++ if (ccs_sigqueue_permission(pid, sig))
++ return -EPERM;
+
+ /* POSIX.1b doesn't mention process groups. */
+ return kill_proc_info(sig, info, pid);
+@@ -3047,6 +3055,8 @@ static int do_rt_tgsigqueueinfo(pid_t tg
+ return -EPERM;
+
+ info->si_signo = sig;
++ if (ccs_tgsigqueue_permission(tgid, pid, sig))
++ return -EPERM;
+
+ return do_send_specific(tgid, pid, sig, info);
+ }
+--- linux-4.1.8.orig/kernel/sys.c
++++ linux-4.1.8/kernel/sys.c
+@@ -183,6 +183,10 @@ SYSCALL_DEFINE3(setpriority, int, which,
+
+ if (which > PRIO_USER || which < PRIO_PROCESS)
+ goto out;
++ if (!ccs_capable(CCS_SYS_NICE)) {
++ error = -EPERM;
++ goto out;
++ }
+
+ /* normalize: avoid signed division (rounding problems) */
+ error = -ESRCH;
+@@ -1222,6 +1226,8 @@ SYSCALL_DEFINE2(sethostname, char __user
+
+ if (len < 0 || len > __NEW_UTS_LEN)
+ return -EINVAL;
++ if (!ccs_capable(CCS_SYS_SETHOSTNAME))
++ return -EPERM;
+ down_write(&uts_sem);
+ errno = -EFAULT;
+ if (!copy_from_user(tmp, name, len)) {
+@@ -1272,6 +1278,8 @@ SYSCALL_DEFINE2(setdomainname, char __us
+ return -EPERM;
+ if (len < 0 || len > __NEW_UTS_LEN)
+ return -EINVAL;
++ if (!ccs_capable(CCS_SYS_SETHOSTNAME))
++ return -EPERM;
+
+ down_write(&uts_sem);
+ errno = -EFAULT;
+--- linux-4.1.8.orig/kernel/time/ntp.c
++++ linux-4.1.8/kernel/time/ntp.c
+@@ -16,6 +16,7 @@
+ #include <linux/mm.h>
+ #include <linux/module.h>
+ #include <linux/rtc.h>
++#include <linux/ccsecurity.h>
+
+ #include "ntp_internal.h"
+
+@@ -626,10 +627,15 @@ int ntp_validate_timex(struct timex *txc
+ if (!(txc->modes & ADJ_OFFSET_READONLY) &&
+ !capable(CAP_SYS_TIME))
+ return -EPERM;
++ if (!(txc->modes & ADJ_OFFSET_READONLY) &&
++ !ccs_capable(CCS_SYS_SETTIME))
++ return -EPERM;
+ } else {
+ /* In order to modify anything, you gotta be super-user! */
+ if (txc->modes && !capable(CAP_SYS_TIME))
+ return -EPERM;
++ if (txc->modes && !ccs_capable(CCS_SYS_SETTIME))
++ return -EPERM;
+ /*
+ * if the quartz is off by more than 10% then
+ * something is VERY wrong!
+@@ -642,6 +648,8 @@ int ntp_validate_timex(struct timex *txc
+
+ if ((txc->modes & ADJ_SETOFFSET) && (!capable(CAP_SYS_TIME)))
+ return -EPERM;
++ if ((txc->modes & ADJ_SETOFFSET) && !ccs_capable(CCS_SYS_SETTIME))
++ return -EPERM;
+
+ /*
+ * Check for potential multiplication overflows that can
+--- linux-4.1.8.orig/net/ipv4/raw.c
++++ linux-4.1.8/net/ipv4/raw.c
+@@ -727,6 +727,10 @@ static int raw_recvmsg(struct sock *sk,
+ skb = skb_recv_datagram(sk, flags, noblock, &err);
+ if (!skb)
+ goto out;
++ if (ccs_socket_post_recvmsg_permission(sk, skb, flags)) {
++ err = -EAGAIN; /* Hope less harmful than -EPERM. */
++ goto out;
++ }
+
+ copied = skb->len;
+ if (len < copied) {
+--- linux-4.1.8.orig/net/ipv4/udp.c
++++ linux-4.1.8/net/ipv4/udp.c
+@@ -1272,6 +1272,10 @@ try_again:
+ &peeked, &off, &err);
+ if (!skb)
+ goto out;
++ if (ccs_socket_post_recvmsg_permission(sk, skb, flags)) {
++ err = -EAGAIN; /* Hope less harmful than -EPERM. */
++ goto out;
++ }
+
+ ulen = skb->len - sizeof(struct udphdr);
+ copied = len;
+--- linux-4.1.8.orig/net/ipv6/raw.c
++++ linux-4.1.8/net/ipv6/raw.c
+@@ -477,6 +477,10 @@ static int rawv6_recvmsg(struct sock *sk
+ skb = skb_recv_datagram(sk, flags, noblock, &err);
+ if (!skb)
+ goto out;
++ if (ccs_socket_post_recvmsg_permission(sk, skb, flags)) {
++ err = -EAGAIN; /* Hope less harmful than -EPERM. */
++ goto out;
++ }
+
+ copied = skb->len;
+ if (copied > len) {
+--- linux-4.1.8.orig/net/ipv6/udp.c
++++ linux-4.1.8/net/ipv6/udp.c
+@@ -413,6 +413,10 @@ try_again:
+ &peeked, &off, &err);
+ if (!skb)
+ goto out;
++ if (ccs_socket_post_recvmsg_permission(sk, skb, flags)) {
++ err = -EAGAIN; /* Hope less harmful than -EPERM. */
++ goto out;
++ }
+
+ ulen = skb->len - sizeof(struct udphdr);
+ copied = len;
+--- linux-4.1.8.orig/net/socket.c
++++ linux-4.1.8/net/socket.c
+@@ -1485,6 +1485,10 @@ SYSCALL_DEFINE4(accept4, int, fd, struct
+ if (err < 0)
+ goto out_fd;
+
++ if (ccs_socket_post_accept_permission(sock, newsock)) {
++ err = -EAGAIN; /* Hope less harmful than -EPERM. */
++ goto out_fd;
++ }
+ if (upeer_sockaddr) {
+ if (newsock->ops->getname(newsock, (struct sockaddr *)&address,
+ &len, 2) < 0) {
+--- linux-4.1.8.orig/net/unix/af_unix.c
++++ linux-4.1.8/net/unix/af_unix.c
+@@ -1800,6 +1800,10 @@ static int unix_dgram_recvmsg(struct soc
+ wake_up_interruptible_sync_poll(&u->peer_wait,
+ POLLOUT | POLLWRNORM | POLLWRBAND);
+
++ if (ccs_socket_post_recvmsg_permission(sk, skb, flags)) {
++ err = -EAGAIN; /* Hope less harmful than -EPERM. */
++ goto out_unlock;
++ }
+ if (msg->msg_name)
+ unix_copy_addr(msg, skb->sk);
+
+--- linux-4.1.8.orig/security/Kconfig
++++ linux-4.1.8/security/Kconfig
+@@ -168,5 +168,7 @@ config DEFAULT_SECURITY
+ default "yama" if DEFAULT_SECURITY_YAMA
+ default "" if DEFAULT_SECURITY_DAC
+
++source security/ccsecurity/Kconfig
++
+ endmenu
+
+--- linux-4.1.8.orig/security/Makefile
++++ linux-4.1.8/security/Makefile
+@@ -27,3 +27,6 @@ obj-$(CONFIG_CGROUP_DEVICE) += device_c
+ # Object integrity file lists
+ subdir-$(CONFIG_INTEGRITY) += integrity
+ obj-$(CONFIG_INTEGRITY) += integrity/
++
++subdir-$(CONFIG_CCSECURITY) += ccsecurity
++obj-$(CONFIG_CCSECURITY) += ccsecurity/
+--- linux-4.1.8.orig/security/security.c
++++ linux-4.1.8/security/security.c
+@@ -226,7 +226,10 @@ int security_syslog(int type)
+
+ int security_settime(const struct timespec *ts, const struct timezone *tz)
+ {
+- return security_ops->settime(ts, tz);
++ int error = security_ops->settime(ts, tz);
++ if (!error)
++ error = ccs_settime(ts, tz);
++ return error;
+ }
+
+ int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
+@@ -303,17 +306,26 @@ int security_sb_statfs(struct dentry *de
+ int security_sb_mount(const char *dev_name, struct path *path,
+ const char *type, unsigned long flags, void *data)
+ {
+- return security_ops->sb_mount(dev_name, path, type, flags, data);
++ int error = security_ops->sb_mount(dev_name, path, type, flags, data);
++ if (!error)
++ error = ccs_sb_mount(dev_name, path, type, flags, data);
++ return error;
+ }
+
+ int security_sb_umount(struct vfsmount *mnt, int flags)
+ {
+- return security_ops->sb_umount(mnt, flags);
++ int error = security_ops->sb_umount(mnt, flags);
++ if (!error)
++ error = ccs_sb_umount(mnt, flags);
++ return error;
+ }
+
+ int security_sb_pivotroot(struct path *old_path, struct path *new_path)
+ {
+- return security_ops->sb_pivotroot(old_path, new_path);
++ int error = security_ops->sb_pivotroot(old_path, new_path);
++ if (!error)
++ error = ccs_sb_pivotroot(old_path, new_path);
++ return error;
+ }
+
+ int security_sb_set_mnt_opts(struct super_block *sb,
+@@ -410,31 +422,47 @@ EXPORT_SYMBOL(security_old_inode_init_se
+ int security_path_mknod(struct path *dir, struct dentry *dentry, umode_t mode,
+ unsigned int dev)
+ {
++ int error;
+ if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
+ return 0;
++ error = ccs_path_mknod(dir, dentry, mode, dev);
++ if (error)
++ return error;
+ return security_ops->path_mknod(dir, dentry, mode, dev);
+ }
+ EXPORT_SYMBOL(security_path_mknod);
+
+ int security_path_mkdir(struct path *dir, struct dentry *dentry, umode_t mode)
+ {
++ int error;
+ if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
+ return 0;
++ error = ccs_path_mkdir(dir, dentry, mode);
++ if (error)
++ return error;
+ return security_ops->path_mkdir(dir, dentry, mode);
+ }
+ EXPORT_SYMBOL(security_path_mkdir);
+
+ int security_path_rmdir(struct path *dir, struct dentry *dentry)
+ {
++ int error;
+ if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
+ return 0;
++ error = ccs_path_rmdir(dir, dentry);
++ if (error)
++ return error;
+ return security_ops->path_rmdir(dir, dentry);
+ }
+
+ int security_path_unlink(struct path *dir, struct dentry *dentry)
+ {
++ int error;
+ if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
+ return 0;
++ error = ccs_path_unlink(dir, dentry);
++ if (error)
++ return error;
+ return security_ops->path_unlink(dir, dentry);
+ }
+ EXPORT_SYMBOL(security_path_unlink);
+@@ -442,16 +470,24 @@ EXPORT_SYMBOL(security_path_unlink);
+ int security_path_symlink(struct path *dir, struct dentry *dentry,
+ const char *old_name)
+ {
++ int error;
+ if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
+ return 0;
++ error = ccs_path_symlink(dir, dentry, old_name);
++ if (error)
++ return error;
+ return security_ops->path_symlink(dir, dentry, old_name);
+ }
+
+ int security_path_link(struct dentry *old_dentry, struct path *new_dir,
+ struct dentry *new_dentry)
+ {
++ int error;
+ if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
+ return 0;
++ error = ccs_path_link(old_dentry, new_dir, new_dentry);
++ if (error)
++ return error;
+ return security_ops->path_link(old_dentry, new_dir, new_dentry);
+ }
+
+@@ -459,6 +495,7 @@ int security_path_rename(struct path *ol
+ struct path *new_dir, struct dentry *new_dentry,
+ unsigned int flags)
+ {
++ int error;
+ if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
+ (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
+ return 0;
+@@ -468,8 +505,15 @@ int security_path_rename(struct path *ol
+ old_dir, old_dentry);
+ if (err)
+ return err;
++ err = ccs_path_rename(new_dir, new_dentry, old_dir,
++ old_dentry);
++ if (err)
++ return err;
+ }
+
++ error = ccs_path_rename(old_dir, old_dentry, new_dir, new_dentry);
++ if (error)
++ return error;
+ return security_ops->path_rename(old_dir, old_dentry, new_dir,
+ new_dentry);
+ }
+@@ -477,27 +521,42 @@ EXPORT_SYMBOL(security_path_rename);
+
+ int security_path_truncate(struct path *path)
+ {
++ int error;
+ if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
+ return 0;
++ error = ccs_path_truncate(path);
++ if (error)
++ return error;
+ return security_ops->path_truncate(path);
+ }
+
+ int security_path_chmod(struct path *path, umode_t mode)
+ {
++ int error;
+ if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
+ return 0;
++ error = ccs_path_chmod(path, mode);
++ if (error)
++ return error;
+ return security_ops->path_chmod(path, mode);
+ }
+
+ int security_path_chown(struct path *path, kuid_t uid, kgid_t gid)
+ {
++ int error;
+ if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
+ return 0;
++ error = ccs_path_chown(path, uid, gid);
++ if (error)
++ return error;
+ return security_ops->path_chown(path, uid, gid);
+ }
+
+ int security_path_chroot(struct path *path)
+ {
++ int error = ccs_path_chroot(path);
++ if (error)
++ return error;
+ return security_ops->path_chroot(path);
+ }
+ #endif
+@@ -610,9 +669,13 @@ EXPORT_SYMBOL_GPL(security_inode_setattr
+
+ int security_inode_getattr(const struct path *path)
+ {
++ int error;
+ if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
+ return 0;
+- return security_ops->inode_getattr(path);
++ error = security_ops->inode_getattr(path);
++ if (!error)
++ error = ccs_inode_getattr(path);
++ return error;
+ }
+
+ int security_inode_setxattr(struct dentry *dentry, const char *name,
+@@ -729,7 +792,10 @@ void security_file_free(struct file *fil
+
+ int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+ {
+- return security_ops->file_ioctl(file, cmd, arg);
++ int error = security_ops->file_ioctl(file, cmd, arg);
++ if (!error)
++ error = ccs_file_ioctl(file, cmd, arg);
++ return error;
+ }
+
+ static inline unsigned long mmap_prot(struct file *file, unsigned long prot)
+@@ -794,7 +860,10 @@ int security_file_lock(struct file *file
+
+ int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
+ {
+- return security_ops->file_fcntl(file, cmd, arg);
++ int error = security_ops->file_fcntl(file, cmd, arg);
++ if (!error)
++ error = ccs_file_fcntl(file, cmd, arg);
++ return error;
+ }
+
+ void security_file_set_fowner(struct file *file)
+@@ -818,6 +887,8 @@ int security_file_open(struct file *file
+ int ret;
+
+ ret = security_ops->file_open(file, cred);
++ if (!ret)
++ ret = ccs_file_open(file, cred);
+ if (ret)
+ return ret;
+
+@@ -1168,7 +1239,10 @@ EXPORT_SYMBOL(security_unix_may_send);
+
+ int security_socket_create(int family, int type, int protocol, int kern)
+ {
+- return security_ops->socket_create(family, type, protocol, kern);
++ int error = security_ops->socket_create(family, type, protocol, kern);
++ if (!error)
++ error = ccs_socket_create(family, type, protocol, kern);
++ return error;
+ }
+
+ int security_socket_post_create(struct socket *sock, int family,
+@@ -1180,17 +1254,26 @@ int security_socket_post_create(struct s
+
+ int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
+ {
+- return security_ops->socket_bind(sock, address, addrlen);
++ int error = security_ops->socket_bind(sock, address, addrlen);
++ if (!error)
++ error = ccs_socket_bind(sock, address, addrlen);
++ return error;
+ }
+
+ int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
+ {
+- return security_ops->socket_connect(sock, address, addrlen);
++ int error = security_ops->socket_connect(sock, address, addrlen);
++ if (!error)
++ error = ccs_socket_connect(sock, address, addrlen);
++ return error;
+ }
+
+ int security_socket_listen(struct socket *sock, int backlog)
+ {
+- return security_ops->socket_listen(sock, backlog);
++ int error = security_ops->socket_listen(sock, backlog);
++ if (!error)
++ error = ccs_socket_listen(sock, backlog);
++ return error;
+ }
+
+ int security_socket_accept(struct socket *sock, struct socket *newsock)
+@@ -1200,7 +1283,10 @@ int security_socket_accept(struct socket
+
+ int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
+ {
+- return security_ops->socket_sendmsg(sock, msg, size);
++ int error = security_ops->socket_sendmsg(sock, msg, size);
++ if (!error)
++ error = ccs_socket_sendmsg(sock, msg, size);
++ return error;
+ }
+
+ int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
diff --git a/recipes-kernel/linux/linux-yocto-4.1/ccs-tools-yocto.4.1.patch b/recipes-kernel/linux/linux-yocto-4.1/ccs-tools-yocto.4.1.patch
new file mode 100644
index 0000000..611d396
--- /dev/null
+++ b/recipes-kernel/linux/linux-yocto-4.1/ccs-tools-yocto.4.1.patch
@@ -0,0 +1,1029 @@
+From 13c3a21c549a87cf7410bd2ff88eeb6cb1ddda8c Mon Sep 17 00:00:00 2001
+From: invalid_git config <unknown at unknown>
+Date: Sun, 25 Oct 2015 12:34:02 -0700
+Subject: [PATCH] This is TOMOYO Linux patch for kernel 4.1.8.
+
+Source code for this patch is https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.1.8.tar.xz
+---
+ fs/exec.c | 2 +-
+ fs/open.c | 2 +
+ fs/proc/version.c | 7 +++
+ include/linux/init_task.h | 9 ++++
+ include/linux/sched.h | 6 +++
+ include/linux/security.h | 62 ++++++++++++++++----------
+ include/net/ip.h | 4 ++
+ kernel/fork.c | 5 +++
+ kernel/kexec.c | 3 ++
+ kernel/module.c | 5 +++
+ kernel/ptrace.c | 10 +++++
+ kernel/reboot.c | 3 ++
+ kernel/sched/core.c | 2 +
+ kernel/signal.c | 10 +++++
+ kernel/sys.c | 8 ++++
+ kernel/time/ntp.c | 8 ++++
+ net/ipv4/raw.c | 4 ++
+ net/ipv4/udp.c | 4 ++
+ net/ipv6/raw.c | 4 ++
+ net/ipv6/udp.c | 4 ++
+ net/socket.c | 4 ++
+ net/unix/af_unix.c | 4 ++
+ security/Kconfig | 2 +
+ security/Makefile | 3 ++
+ security/security.c | 110 +++++++++++++++++++++++++++++++++++++++++-----
+ 25 files changed, 248 insertions(+), 37 deletions(-)
+
+diff --git a/fs/exec.c b/fs/exec.c
+index 1977c2a..5c69bcc 100644
+--- a/fs/exec.c
++++ b/fs/exec.c
+@@ -1461,7 +1461,7 @@ static int exec_binprm(struct linux_binprm *bprm)
+ old_vpid = task_pid_nr_ns(current, task_active_pid_ns(current->parent));
+ rcu_read_unlock();
+
+- ret = search_binary_handler(bprm);
++ ret = ccs_search_binary_handler(bprm);
+ if (ret >= 0) {
+ audit_bprm(bprm);
+ trace_sched_process_exec(current, old_pid, bprm);
+diff --git a/fs/open.c b/fs/open.c
+index a94e2e7..6c79f72c 100644
+--- a/fs/open.c
++++ b/fs/open.c
+@@ -1108,6 +1108,8 @@ EXPORT_SYMBOL(sys_close);
+ */
+ SYSCALL_DEFINE0(vhangup)
+ {
++ if (!ccs_capable(CCS_SYS_VHANGUP))
++ return -EPERM;
+ if (capable(CAP_SYS_TTY_CONFIG)) {
+ tty_vhangup_self();
+ return 0;
+diff --git a/fs/proc/version.c b/fs/proc/version.c
+index d2154eb..a84ba8d 100644
+--- a/fs/proc/version.c
++++ b/fs/proc/version.c
+@@ -32,3 +32,10 @@ static int __init proc_version_init(void)
+ return 0;
+ }
+ fs_initcall(proc_version_init);
++
++static int __init ccs_show_version(void)
++{
++ printk(KERN_INFO "Hook version: 4.1.8 2015/09/26\n");
++ return 0;
++}
++fs_initcall(ccs_show_version);
+diff --git a/include/linux/init_task.h b/include/linux/init_task.h
+index 696d223..c112803 100644
+--- a/include/linux/init_task.h
++++ b/include/linux/init_task.h
+@@ -182,6 +182,14 @@ extern struct task_group root_task_group;
+ # define INIT_KASAN(tsk)
+ #endif
+
++#if defined(CONFIG_CCSECURITY) && !defined(CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY)
++#define INIT_CCSECURITY \
++ .ccs_domain_info = NULL, \
++ .ccs_flags = 0,
++#else
++#define INIT_CCSECURITY
++#endif
++
+ /*
+ * INIT_TASK is used to set up the first task table, touch at
+ * your own risk!. Base=0, limit=0x1fffff (=2MB)
+@@ -258,6 +266,7 @@ extern struct task_group root_task_group;
+ INIT_VTIME(tsk) \
+ INIT_NUMA_BALANCING(tsk) \
+ INIT_KASAN(tsk) \
++ INIT_CCSECURITY \
+ }
+
+
+diff --git a/include/linux/sched.h b/include/linux/sched.h
+index 26a2e61..c32a704 100644
+--- a/include/linux/sched.h
++++ b/include/linux/sched.h
+@@ -6,6 +6,8 @@
+ #include <linux/sched/prio.h>
+
+
++struct ccs_domain_info;
++
+ struct sched_param {
+ int sched_priority;
+ };
+@@ -1724,6 +1726,10 @@ struct task_struct {
+ #ifdef CONFIG_DEBUG_ATOMIC_SLEEP
+ unsigned long task_state_change;
+ #endif
++#if defined(CONFIG_CCSECURITY) && !defined(CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY)
++ struct ccs_domain_info *ccs_domain_info;
++ u32 ccs_flags;
++#endif
+ };
+
+ /* Future-safe accessor for struct task_struct's cpus_allowed. */
+diff --git a/include/linux/security.h b/include/linux/security.h
+index 18264ea..621562b 100644
+--- a/include/linux/security.h
++++ b/include/linux/security.h
+@@ -53,6 +53,7 @@ struct msg_queue;
+ struct xattr;
+ struct xfrm_sec_ctx;
+ struct mm_struct;
++#include <linux/ccsecurity.h>
+
+ /* Maximum number of letters for an LSM name string */
+ #define SECURITY_NAME_MAX 10
+@@ -2042,7 +2043,10 @@ static inline int security_syslog(int type)
+ static inline int security_settime(const struct timespec *ts,
+ const struct timezone *tz)
+ {
+- return cap_settime(ts, tz);
++ int error = cap_settime(ts, tz);
++ if (!error)
++ error = ccs_settime(ts, tz);
++ return error;
+ }
+
+ static inline int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
+@@ -2111,18 +2115,18 @@ static inline int security_sb_mount(const char *dev_name, struct path *path,
+ const char *type, unsigned long flags,
+ void *data)
+ {
+- return 0;
++ return ccs_sb_mount(dev_name, path, type, flags, data);
+ }
+
+ static inline int security_sb_umount(struct vfsmount *mnt, int flags)
+ {
+- return 0;
++ return ccs_sb_umount(mnt, flags);
+ }
+
+ static inline int security_sb_pivotroot(struct path *old_path,
+ struct path *new_path)
+ {
+- return 0;
++ return ccs_sb_pivotroot(old_path, new_path);
+ }
+
+ static inline int security_sb_set_mnt_opts(struct super_block *sb,
+@@ -2260,7 +2264,7 @@ static inline int security_inode_setattr(struct dentry *dentry,
+
+ static inline int security_inode_getattr(const struct path *path)
+ {
+- return 0;
++ return ccs_inode_getattr(path);
+ }
+
+ static inline int security_inode_setxattr(struct dentry *dentry,
+@@ -2336,7 +2340,7 @@ static inline void security_file_free(struct file *file)
+ static inline int security_file_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+ {
+- return 0;
++ return ccs_file_ioctl(file, cmd, arg);
+ }
+
+ static inline int security_mmap_file(struct file *file, unsigned long prot,
+@@ -2365,7 +2369,7 @@ static inline int security_file_lock(struct file *file, unsigned int cmd)
+ static inline int security_file_fcntl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+ {
+- return 0;
++ return ccs_file_fcntl(file, cmd, arg);
+ }
+
+ static inline void security_file_set_fowner(struct file *file)
+@@ -2388,7 +2392,7 @@ static inline int security_file_receive(struct file *file)
+ static inline int security_file_open(struct file *file,
+ const struct cred *cred)
+ {
+- return 0;
++ return ccs_file_open(file, cred);
+ }
+
+ static inline int security_task_create(unsigned long clone_flags)
+@@ -2750,7 +2754,7 @@ static inline int security_unix_may_send(struct socket *sock,
+ static inline int security_socket_create(int family, int type,
+ int protocol, int kern)
+ {
+- return 0;
++ return ccs_socket_create(family, type, protocol, kern);
+ }
+
+ static inline int security_socket_post_create(struct socket *sock,
+@@ -2765,19 +2769,19 @@ static inline int security_socket_bind(struct socket *sock,
+ struct sockaddr *address,
+ int addrlen)
+ {
+- return 0;
++ return ccs_socket_bind(sock, address, addrlen);
+ }
+
+ static inline int security_socket_connect(struct socket *sock,
+ struct sockaddr *address,
+ int addrlen)
+ {
+- return 0;
++ return ccs_socket_connect(sock, address, addrlen);
+ }
+
+ static inline int security_socket_listen(struct socket *sock, int backlog)
+ {
+- return 0;
++ return ccs_socket_listen(sock, backlog);
+ }
+
+ static inline int security_socket_accept(struct socket *sock,
+@@ -2789,7 +2793,7 @@ static inline int security_socket_accept(struct socket *sock,
+ static inline int security_socket_sendmsg(struct socket *sock,
+ struct msghdr *msg, int size)
+ {
+- return 0;
++ return ccs_socket_sendmsg(sock, msg, size);
+ }
+
+ static inline int security_socket_recvmsg(struct socket *sock,
+@@ -3031,42 +3035,42 @@ int security_path_chroot(struct path *path);
+ #else /* CONFIG_SECURITY_PATH */
+ static inline int security_path_unlink(struct path *dir, struct dentry *dentry)
+ {
+- return 0;
++ return ccs_path_unlink(dir, dentry);
+ }
+
+ static inline int security_path_mkdir(struct path *dir, struct dentry *dentry,
+ umode_t mode)
+ {
+- return 0;
++ return ccs_path_mkdir(dir, dentry, mode);
+ }
+
+ static inline int security_path_rmdir(struct path *dir, struct dentry *dentry)
+ {
+- return 0;
++ return ccs_path_rmdir(dir, dentry);
+ }
+
+ static inline int security_path_mknod(struct path *dir, struct dentry *dentry,
+ umode_t mode, unsigned int dev)
+ {
+- return 0;
++ return ccs_path_mknod(dir, dentry, mode, dev);
+ }
+
+ static inline int security_path_truncate(struct path *path)
+ {
+- return 0;
++ return ccs_path_truncate(path);
+ }
+
+ static inline int security_path_symlink(struct path *dir, struct dentry *dentry,
+ const char *old_name)
+ {
+- return 0;
++ return ccs_path_symlink(dir, dentry, old_name);
+ }
+
+ static inline int security_path_link(struct dentry *old_dentry,
+ struct path *new_dir,
+ struct dentry *new_dentry)
+ {
+- return 0;
++ return ccs_path_link(old_dentry, new_dir, new_dentry);
+ }
+
+ static inline int security_path_rename(struct path *old_dir,
+@@ -3075,22 +3079,32 @@ static inline int security_path_rename(struct path *old_dir,
+ struct dentry *new_dentry,
+ unsigned int flags)
+ {
+- return 0;
++ /*
++ * Not using RENAME_EXCHANGE here in order to avoid KABI breakage
++ * by doing "#include <uapi/linux/fs.h>" .
++ */
++ if (flags & (1 << 1)) {
++ int err = ccs_path_rename(new_dir, new_dentry, old_dir,
++ old_dentry);
++ if (err)
++ return err;
++ }
++ return ccs_path_rename(old_dir, old_dentry, new_dir, new_dentry);
+ }
+
+ static inline int security_path_chmod(struct path *path, umode_t mode)
+ {
+- return 0;
++ return ccs_path_chmod(path, mode);
+ }
+
+ static inline int security_path_chown(struct path *path, kuid_t uid, kgid_t gid)
+ {
+- return 0;
++ return ccs_path_chown(path, uid, gid);
+ }
+
+ static inline int security_path_chroot(struct path *path)
+ {
+- return 0;
++ return ccs_path_chroot(path);
+ }
+ #endif /* CONFIG_SECURITY_PATH */
+
+diff --git a/include/net/ip.h b/include/net/ip.h
+index d14af7e..34eb1cb 100644
+--- a/include/net/ip.h
++++ b/include/net/ip.h
+@@ -216,6 +216,8 @@ void inet_get_local_port_range(struct net *net, int *low, int *high);
+ #ifdef CONFIG_SYSCTL
+ static inline int inet_is_local_reserved_port(struct net *net, int port)
+ {
++ if (ccs_lport_reserved(port))
++ return 1;
+ if (!net->ipv4.sysctl_local_reserved_ports)
+ return 0;
+ return test_bit(port, net->ipv4.sysctl_local_reserved_ports);
+@@ -229,6 +231,8 @@ static inline bool sysctl_dev_name_is_allowed(const char *name)
+ #else
+ static inline int inet_is_local_reserved_port(struct net *net, int port)
+ {
++ if (ccs_lport_reserved(port))
++ return 1;
+ return 0;
+ }
+ #endif
+diff --git a/kernel/fork.c b/kernel/fork.c
+index 7e215ba..9bce902 100644
+--- a/kernel/fork.c
++++ b/kernel/fork.c
+@@ -257,6 +257,7 @@ void __put_task_struct(struct task_struct *tsk)
+ delayacct_tsk_free(tsk);
+ put_signal_struct(tsk->signal);
+
++ ccs_free_task_security(tsk);
+ if (!profile_handoff_task(tsk))
+ free_task(tsk);
+ }
+@@ -1423,6 +1424,9 @@ static struct task_struct *copy_process(unsigned long clone_flags,
+ goto bad_fork_cleanup_perf;
+ /* copy all the process information */
+ shm_init_task(p);
++ retval = ccs_alloc_task_security(p);
++ if (retval)
++ goto bad_fork_cleanup_audit;
+ retval = copy_semundo(clone_flags, p);
+ if (retval)
+ goto bad_fork_cleanup_audit;
+@@ -1627,6 +1631,7 @@ bad_fork_cleanup_semundo:
+ exit_sem(p);
+ bad_fork_cleanup_audit:
+ audit_free(p);
++ ccs_free_task_security(p);
+ bad_fork_cleanup_perf:
+ perf_event_free_task(p);
+ bad_fork_cleanup_policy:
+diff --git a/kernel/kexec.c b/kernel/kexec.c
+index 7a36fdc..294444e 100644
+--- a/kernel/kexec.c
++++ b/kernel/kexec.c
+@@ -41,6 +41,7 @@
+ #include <asm/uaccess.h>
+ #include <asm/io.h>
+ #include <asm/sections.h>
++#include <linux/ccsecurity.h>
+
+ #include <crypto/hash.h>
+ #include <crypto/sha.h>
+@@ -1245,6 +1246,8 @@ SYSCALL_DEFINE4(kexec_load, unsigned long, entry, unsigned long, nr_segments,
+ /* We only trust the superuser with rebooting the system. */
+ if (!capable(CAP_SYS_BOOT) || kexec_load_disabled)
+ return -EPERM;
++ if (!ccs_capable(CCS_SYS_KEXEC_LOAD))
++ return -EPERM;
+
+ /*
+ * Verify we have a legal set of flags
+diff --git a/kernel/module.c b/kernel/module.c
+index cfc9e84..73fd5f5 100644
+--- a/kernel/module.c
++++ b/kernel/module.c
+@@ -61,6 +61,7 @@
+ #include <linux/bsearch.h>
+ #include <uapi/linux/module.h>
+ #include "module-internal.h"
++#include <linux/ccsecurity.h>
+
+ #define CREATE_TRACE_POINTS
+ #include <trace/events/module.h>
+@@ -799,6 +800,8 @@ SYSCALL_DEFINE2(delete_module, const char __user *, name_user,
+
+ if (!capable(CAP_SYS_MODULE) || modules_disabled)
+ return -EPERM;
++ if (!ccs_capable(CCS_USE_KERNEL_MODULE))
++ return -EPERM;
+
+ if (strncpy_from_user(name, name_user, MODULE_NAME_LEN-1) < 0)
+ return -EFAULT;
+@@ -3155,6 +3158,8 @@ static int may_init_module(void)
+ {
+ if (!capable(CAP_SYS_MODULE) || modules_disabled)
+ return -EPERM;
++ if (!ccs_capable(CCS_USE_KERNEL_MODULE))
++ return -EPERM;
+
+ return 0;
+ }
+diff --git a/kernel/ptrace.c b/kernel/ptrace.c
+index c8e0e05..4106a2a 100644
+--- a/kernel/ptrace.c
++++ b/kernel/ptrace.c
+@@ -1034,6 +1034,11 @@ SYSCALL_DEFINE4(ptrace, long, request, long, pid, unsigned long, addr,
+ {
+ struct task_struct *child;
+ long ret;
++ {
++ const int rc = ccs_ptrace_permission(request, pid);
++ if (rc)
++ return rc;
++ }
+
+ if (request == PTRACE_TRACEME) {
+ ret = ptrace_traceme();
+@@ -1180,6 +1185,11 @@ COMPAT_SYSCALL_DEFINE4(ptrace, compat_long_t, request, compat_long_t, pid,
+ {
+ struct task_struct *child;
+ long ret;
++ {
++ const int rc = ccs_ptrace_permission(request, pid);
++ if (rc)
++ return rc;
++ }
+
+ if (request == PTRACE_TRACEME) {
+ ret = ptrace_traceme();
+diff --git a/kernel/reboot.c b/kernel/reboot.c
+index d20c85d..61ffd97 100644
+--- a/kernel/reboot.c
++++ b/kernel/reboot.c
+@@ -16,6 +16,7 @@
+ #include <linux/syscalls.h>
+ #include <linux/syscore_ops.h>
+ #include <linux/uaccess.h>
++#include <linux/ccsecurity.h>
+
+ /*
+ * this indicates whether you can reboot with ctrl-alt-del: the default is yes
+@@ -295,6 +296,8 @@ SYSCALL_DEFINE4(reboot, int, magic1, int, magic2, unsigned int, cmd,
+ magic2 != LINUX_REBOOT_MAGIC2B &&
+ magic2 != LINUX_REBOOT_MAGIC2C))
+ return -EINVAL;
++ if (!ccs_capable(CCS_SYS_REBOOT))
++ return -EPERM;
+
+ /*
+ * If pid namespaces are enabled and the current task is in a child
+diff --git a/kernel/sched/core.c b/kernel/sched/core.c
+index e691052..c63bbd8 100644
+--- a/kernel/sched/core.c
++++ b/kernel/sched/core.c
+@@ -3145,6 +3145,8 @@ int can_nice(const struct task_struct *p, const int nice)
+ SYSCALL_DEFINE1(nice, int, increment)
+ {
+ long nice, retval;
++ if (!ccs_capable(CCS_SYS_NICE))
++ return -EPERM;
+
+ /*
+ * Setpriority might change our priority at the same moment.
+diff --git a/kernel/signal.c b/kernel/signal.c
+index 0206be7..9e01cca 100644
+--- a/kernel/signal.c
++++ b/kernel/signal.c
+@@ -2901,6 +2901,8 @@ SYSCALL_DEFINE4(rt_sigtimedwait, const sigset_t __user *, uthese,
+ SYSCALL_DEFINE2(kill, pid_t, pid, int, sig)
+ {
+ struct siginfo info;
++ if (ccs_kill_permission(pid, sig))
++ return -EPERM;
+
+ info.si_signo = sig;
+ info.si_errno = 0;
+@@ -2969,6 +2971,8 @@ SYSCALL_DEFINE3(tgkill, pid_t, tgid, pid_t, pid, int, sig)
+ /* This is only valid for single tasks */
+ if (pid <= 0 || tgid <= 0)
+ return -EINVAL;
++ if (ccs_tgkill_permission(tgid, pid, sig))
++ return -EPERM;
+
+ return do_tkill(tgid, pid, sig);
+ }
+@@ -2985,6 +2989,8 @@ SYSCALL_DEFINE2(tkill, pid_t, pid, int, sig)
+ /* This is only valid for single tasks */
+ if (pid <= 0)
+ return -EINVAL;
++ if (ccs_tkill_permission(pid, sig))
++ return -EPERM;
+
+ return do_tkill(0, pid, sig);
+ }
+@@ -2999,6 +3005,8 @@ static int do_rt_sigqueueinfo(pid_t pid, int sig, siginfo_t *info)
+ return -EPERM;
+
+ info->si_signo = sig;
++ if (ccs_sigqueue_permission(pid, sig))
++ return -EPERM;
+
+ /* POSIX.1b doesn't mention process groups. */
+ return kill_proc_info(sig, info, pid);
+@@ -3047,6 +3055,8 @@ static int do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig, siginfo_t *info)
+ return -EPERM;
+
+ info->si_signo = sig;
++ if (ccs_tgsigqueue_permission(tgid, pid, sig))
++ return -EPERM;
+
+ return do_send_specific(tgid, pid, sig, info);
+ }
+diff --git a/kernel/sys.c b/kernel/sys.c
+index a4e372b..77c6970 100644
+--- a/kernel/sys.c
++++ b/kernel/sys.c
+@@ -183,6 +183,10 @@ SYSCALL_DEFINE3(setpriority, int, which, int, who, int, niceval)
+
+ if (which > PRIO_USER || which < PRIO_PROCESS)
+ goto out;
++ if (!ccs_capable(CCS_SYS_NICE)) {
++ error = -EPERM;
++ goto out;
++ }
+
+ /* normalize: avoid signed division (rounding problems) */
+ error = -ESRCH;
+@@ -1222,6 +1226,8 @@ SYSCALL_DEFINE2(sethostname, char __user *, name, int, len)
+
+ if (len < 0 || len > __NEW_UTS_LEN)
+ return -EINVAL;
++ if (!ccs_capable(CCS_SYS_SETHOSTNAME))
++ return -EPERM;
+ down_write(&uts_sem);
+ errno = -EFAULT;
+ if (!copy_from_user(tmp, name, len)) {
+@@ -1272,6 +1278,8 @@ SYSCALL_DEFINE2(setdomainname, char __user *, name, int, len)
+ return -EPERM;
+ if (len < 0 || len > __NEW_UTS_LEN)
+ return -EINVAL;
++ if (!ccs_capable(CCS_SYS_SETHOSTNAME))
++ return -EPERM;
+
+ down_write(&uts_sem);
+ errno = -EFAULT;
+diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
+index 7a68100..3c8766f 100644
+--- a/kernel/time/ntp.c
++++ b/kernel/time/ntp.c
+@@ -16,6 +16,7 @@
+ #include <linux/mm.h>
+ #include <linux/module.h>
+ #include <linux/rtc.h>
++#include <linux/ccsecurity.h>
+
+ #include "ntp_internal.h"
+
+@@ -626,10 +627,15 @@ int ntp_validate_timex(struct timex *txc)
+ if (!(txc->modes & ADJ_OFFSET_READONLY) &&
+ !capable(CAP_SYS_TIME))
+ return -EPERM;
++ if (!(txc->modes & ADJ_OFFSET_READONLY) &&
++ !ccs_capable(CCS_SYS_SETTIME))
++ return -EPERM;
+ } else {
+ /* In order to modify anything, you gotta be super-user! */
+ if (txc->modes && !capable(CAP_SYS_TIME))
+ return -EPERM;
++ if (txc->modes && !ccs_capable(CCS_SYS_SETTIME))
++ return -EPERM;
+ /*
+ * if the quartz is off by more than 10% then
+ * something is VERY wrong!
+@@ -642,6 +648,8 @@ int ntp_validate_timex(struct timex *txc)
+
+ if ((txc->modes & ADJ_SETOFFSET) && (!capable(CAP_SYS_TIME)))
+ return -EPERM;
++ if ((txc->modes & ADJ_SETOFFSET) && !ccs_capable(CCS_SYS_SETTIME))
++ return -EPERM;
+
+ /*
+ * Check for potential multiplication overflows that can
+diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
+index 561cd4b..16e23e5 100644
+--- a/net/ipv4/raw.c
++++ b/net/ipv4/raw.c
+@@ -727,6 +727,10 @@ static int raw_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
+ skb = skb_recv_datagram(sk, flags, noblock, &err);
+ if (!skb)
+ goto out;
++ if (ccs_socket_post_recvmsg_permission(sk, skb, flags)) {
++ err = -EAGAIN; /* Hope less harmful than -EPERM. */
++ goto out;
++ }
+
+ copied = skb->len;
+ if (len < copied) {
+diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
+index 83aa604..0326e29 100644
+--- a/net/ipv4/udp.c
++++ b/net/ipv4/udp.c
+@@ -1272,6 +1272,10 @@ try_again:
+ &peeked, &off, &err);
+ if (!skb)
+ goto out;
++ if (ccs_socket_post_recvmsg_permission(sk, skb, flags)) {
++ err = -EAGAIN; /* Hope less harmful than -EPERM. */
++ goto out;
++ }
+
+ ulen = skb->len - sizeof(struct udphdr);
+ copied = len;
+diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
+index 8072bd4..fbd33d4 100644
+--- a/net/ipv6/raw.c
++++ b/net/ipv6/raw.c
+@@ -477,6 +477,10 @@ static int rawv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
+ skb = skb_recv_datagram(sk, flags, noblock, &err);
+ if (!skb)
+ goto out;
++ if (ccs_socket_post_recvmsg_permission(sk, skb, flags)) {
++ err = -EAGAIN; /* Hope less harmful than -EPERM. */
++ goto out;
++ }
+
+ copied = skb->len;
+ if (copied > len) {
+diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
+index e51fc3e..5b09dbb 100644
+--- a/net/ipv6/udp.c
++++ b/net/ipv6/udp.c
+@@ -413,6 +413,10 @@ try_again:
+ &peeked, &off, &err);
+ if (!skb)
+ goto out;
++ if (ccs_socket_post_recvmsg_permission(sk, skb, flags)) {
++ err = -EAGAIN; /* Hope less harmful than -EPERM. */
++ goto out;
++ }
+
+ ulen = skb->len - sizeof(struct udphdr);
+ copied = len;
+diff --git a/net/socket.c b/net/socket.c
+index 884e329..767338ff 100644
+--- a/net/socket.c
++++ b/net/socket.c
+@@ -1485,6 +1485,10 @@ SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr,
+ if (err < 0)
+ goto out_fd;
+
++ if (ccs_socket_post_accept_permission(sock, newsock)) {
++ err = -EAGAIN; /* Hope less harmful than -EPERM. */
++ goto out_fd;
++ }
+ if (upeer_sockaddr) {
+ if (newsock->ops->getname(newsock, (struct sockaddr *)&address,
+ &len, 2) < 0) {
+diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
+index 0643059..ba5d3d0 100644
+--- a/net/unix/af_unix.c
++++ b/net/unix/af_unix.c
+@@ -1800,6 +1800,10 @@ static int unix_dgram_recvmsg(struct socket *sock, struct msghdr *msg,
+ wake_up_interruptible_sync_poll(&u->peer_wait,
+ POLLOUT | POLLWRNORM | POLLWRBAND);
+
++ if (ccs_socket_post_recvmsg_permission(sk, skb, flags)) {
++ err = -EAGAIN; /* Hope less harmful than -EPERM. */
++ goto out_unlock;
++ }
+ if (msg->msg_name)
+ unix_copy_addr(msg, skb->sk);
+
+diff --git a/security/Kconfig b/security/Kconfig
+index bf4ec46..4ce2bf2 100644
+--- a/security/Kconfig
++++ b/security/Kconfig
+@@ -168,5 +168,7 @@ config DEFAULT_SECURITY
+ default "yama" if DEFAULT_SECURITY_YAMA
+ default "" if DEFAULT_SECURITY_DAC
+
++source security/ccsecurity/Kconfig
++
+ endmenu
+
+diff --git a/security/Makefile b/security/Makefile
+index 05f1c93..4a42724 100644
+--- a/security/Makefile
++++ b/security/Makefile
+@@ -27,3 +27,6 @@ obj-$(CONFIG_CGROUP_DEVICE) += device_cgroup.o
+ # Object integrity file lists
+ subdir-$(CONFIG_INTEGRITY) += integrity
+ obj-$(CONFIG_INTEGRITY) += integrity/
++
++subdir-$(CONFIG_CCSECURITY) += ccsecurity
++obj-$(CONFIG_CCSECURITY) += ccsecurity/
+diff --git a/security/security.c b/security/security.c
+index c1c7cd1..a8ed3d0 100644
+--- a/security/security.c
++++ b/security/security.c
+@@ -226,7 +226,10 @@ int security_syslog(int type)
+
+ int security_settime(const struct timespec *ts, const struct timezone *tz)
+ {
+- return security_ops->settime(ts, tz);
++ int error = security_ops->settime(ts, tz);
++ if (!error)
++ error = ccs_settime(ts, tz);
++ return error;
+ }
+
+ int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
+@@ -303,17 +306,26 @@ int security_sb_statfs(struct dentry *dentry)
+ int security_sb_mount(const char *dev_name, struct path *path,
+ const char *type, unsigned long flags, void *data)
+ {
+- return security_ops->sb_mount(dev_name, path, type, flags, data);
++ int error = security_ops->sb_mount(dev_name, path, type, flags, data);
++ if (!error)
++ error = ccs_sb_mount(dev_name, path, type, flags, data);
++ return error;
+ }
+
+ int security_sb_umount(struct vfsmount *mnt, int flags)
+ {
+- return security_ops->sb_umount(mnt, flags);
++ int error = security_ops->sb_umount(mnt, flags);
++ if (!error)
++ error = ccs_sb_umount(mnt, flags);
++ return error;
+ }
+
+ int security_sb_pivotroot(struct path *old_path, struct path *new_path)
+ {
+- return security_ops->sb_pivotroot(old_path, new_path);
++ int error = security_ops->sb_pivotroot(old_path, new_path);
++ if (!error)
++ error = ccs_sb_pivotroot(old_path, new_path);
++ return error;
+ }
+
+ int security_sb_set_mnt_opts(struct super_block *sb,
+@@ -410,32 +422,48 @@ EXPORT_SYMBOL(security_old_inode_init_security);
+ int security_path_mknod(struct path *dir, struct dentry *dentry, umode_t mode,
+ unsigned int dev)
+ {
++ int error;
+ if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
+ return 0;
++ error = ccs_path_mknod(dir, dentry, mode, dev);
++ if (error)
++ return error;
+ return security_ops->path_mknod(dir, dentry, mode, dev);
+ }
+ EXPORT_SYMBOL(security_path_mknod);
+
+ int security_path_mkdir(struct path *dir, struct dentry *dentry, umode_t mode)
+ {
++ int error;
+ if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
+ return 0;
++ error = ccs_path_mkdir(dir, dentry, mode);
++ if (error)
++ return error;
+ return security_ops->path_mkdir(dir, dentry, mode);
+ }
+ EXPORT_SYMBOL(security_path_mkdir);
+
+ int security_path_rmdir(struct path *dir, struct dentry *dentry)
+ {
++ int error;
+ if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
+ return 0;
++ error = ccs_path_rmdir(dir, dentry);
++ if (error)
++ return error;
+ return security_ops->path_rmdir(dir, dentry);
+ }
+ EXPORT_SYMBOL(security_path_rmdir);
+
+ int security_path_unlink(struct path *dir, struct dentry *dentry)
+ {
++ int error;
+ if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
+ return 0;
++ error = ccs_path_unlink(dir, dentry);
++ if (error)
++ return error;
+ return security_ops->path_unlink(dir, dentry);
+ }
+ EXPORT_SYMBOL(security_path_unlink);
+@@ -443,8 +471,12 @@ EXPORT_SYMBOL(security_path_unlink);
+ int security_path_symlink(struct path *dir, struct dentry *dentry,
+ const char *old_name)
+ {
++ int error;
+ if (unlikely(IS_PRIVATE(d_backing_inode(dir->dentry))))
+ return 0;
++ error = ccs_path_symlink(dir, dentry, old_name);
++ if (error)
++ return error;
+ return security_ops->path_symlink(dir, dentry, old_name);
+ }
+ EXPORT_SYMBOL(security_path_symlink);
+@@ -452,8 +484,12 @@ EXPORT_SYMBOL(security_path_symlink);
+ int security_path_link(struct dentry *old_dentry, struct path *new_dir,
+ struct dentry *new_dentry)
+ {
++ int error;
+ if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry))))
+ return 0;
++ error = ccs_path_link(old_dentry, new_dir, new_dentry);
++ if (error)
++ return error;
+ return security_ops->path_link(old_dentry, new_dir, new_dentry);
+ }
+ EXPORT_SYMBOL(security_path_link);
+@@ -462,6 +498,7 @@ int security_path_rename(struct path *old_dir, struct dentry *old_dentry,
+ struct path *new_dir, struct dentry *new_dentry,
+ unsigned int flags)
+ {
++ int error;
+ if (unlikely(IS_PRIVATE(d_backing_inode(old_dentry)) ||
+ (d_is_positive(new_dentry) && IS_PRIVATE(d_backing_inode(new_dentry)))))
+ return 0;
+@@ -471,8 +508,15 @@ int security_path_rename(struct path *old_dir, struct dentry *old_dentry,
+ old_dir, old_dentry);
+ if (err)
+ return err;
++ err = ccs_path_rename(new_dir, new_dentry, old_dir,
++ old_dentry);
++ if (err)
++ return err;
+ }
+
++ error = ccs_path_rename(old_dir, old_dentry, new_dir, new_dentry);
++ if (error)
++ return error;
+ return security_ops->path_rename(old_dir, old_dentry, new_dir,
+ new_dentry);
+ }
+@@ -480,30 +524,45 @@ EXPORT_SYMBOL(security_path_rename);
+
+ int security_path_truncate(struct path *path)
+ {
++ int error;
+ if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
+ return 0;
++ error = ccs_path_truncate(path);
++ if (error)
++ return error;
+ return security_ops->path_truncate(path);
+ }
+ EXPORT_SYMBOL(security_path_truncate);
+
+ int security_path_chmod(struct path *path, umode_t mode)
+ {
++ int error;
+ if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
+ return 0;
++ error = ccs_path_chmod(path, mode);
++ if (error)
++ return error;
+ return security_ops->path_chmod(path, mode);
+ }
+ EXPORT_SYMBOL(security_path_chmod);
+
+ int security_path_chown(struct path *path, kuid_t uid, kgid_t gid)
+ {
++ int error;
+ if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
+ return 0;
++ error = ccs_path_chown(path, uid, gid);
++ if (error)
++ return error;
+ return security_ops->path_chown(path, uid, gid);
+ }
+ EXPORT_SYMBOL(security_path_chown);
+
+ int security_path_chroot(struct path *path)
+ {
++ int error = ccs_path_chroot(path);
++ if (error)
++ return error;
+ return security_ops->path_chroot(path);
+ }
+ #endif
+@@ -618,9 +677,13 @@ EXPORT_SYMBOL_GPL(security_inode_setattr);
+
+ int security_inode_getattr(const struct path *path)
+ {
++ int error;
+ if (unlikely(IS_PRIVATE(d_backing_inode(path->dentry))))
+ return 0;
+- return security_ops->inode_getattr(path);
++ error = security_ops->inode_getattr(path);
++ if (!error)
++ error = ccs_inode_getattr(path);
++ return error;
+ }
+
+ int security_inode_setxattr(struct dentry *dentry, const char *name,
+@@ -738,7 +801,10 @@ void security_file_free(struct file *file)
+
+ int security_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+ {
+- return security_ops->file_ioctl(file, cmd, arg);
++ int error = security_ops->file_ioctl(file, cmd, arg);
++ if (!error)
++ error = ccs_file_ioctl(file, cmd, arg);
++ return error;
+ }
+
+ static inline unsigned long mmap_prot(struct file *file, unsigned long prot)
+@@ -804,7 +870,10 @@ int security_file_lock(struct file *file, unsigned int cmd)
+
+ int security_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
+ {
+- return security_ops->file_fcntl(file, cmd, arg);
++ int error = security_ops->file_fcntl(file, cmd, arg);
++ if (!error)
++ error = ccs_file_fcntl(file, cmd, arg);
++ return error;
+ }
+
+ void security_file_set_fowner(struct file *file)
+@@ -828,6 +897,8 @@ int security_file_open(struct file *file, const struct cred *cred)
+ int ret;
+
+ ret = security_ops->file_open(file, cred);
++ if (!ret)
++ ret = ccs_file_open(file, cred);
+ if (ret)
+ return ret;
+
+@@ -1178,7 +1249,10 @@ EXPORT_SYMBOL(security_unix_may_send);
+
+ int security_socket_create(int family, int type, int protocol, int kern)
+ {
+- return security_ops->socket_create(family, type, protocol, kern);
++ int error = security_ops->socket_create(family, type, protocol, kern);
++ if (!error)
++ error = ccs_socket_create(family, type, protocol, kern);
++ return error;
+ }
+
+ int security_socket_post_create(struct socket *sock, int family,
+@@ -1190,17 +1264,26 @@ int security_socket_post_create(struct socket *sock, int family,
+
+ int security_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
+ {
+- return security_ops->socket_bind(sock, address, addrlen);
++ int error = security_ops->socket_bind(sock, address, addrlen);
++ if (!error)
++ error = ccs_socket_bind(sock, address, addrlen);
++ return error;
+ }
+
+ int security_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
+ {
+- return security_ops->socket_connect(sock, address, addrlen);
++ int error = security_ops->socket_connect(sock, address, addrlen);
++ if (!error)
++ error = ccs_socket_connect(sock, address, addrlen);
++ return error;
+ }
+
+ int security_socket_listen(struct socket *sock, int backlog)
+ {
+- return security_ops->socket_listen(sock, backlog);
++ int error = security_ops->socket_listen(sock, backlog);
++ if (!error)
++ error = ccs_socket_listen(sock, backlog);
++ return error;
+ }
+
+ int security_socket_accept(struct socket *sock, struct socket *newsock)
+@@ -1210,7 +1293,10 @@ int security_socket_accept(struct socket *sock, struct socket *newsock)
+
+ int security_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
+ {
+- return security_ops->socket_sendmsg(sock, msg, size);
++ int error = security_ops->socket_sendmsg(sock, msg, size);
++ if (!error)
++ error = ccs_socket_sendmsg(sock, msg, size);
++ return error;
+ }
+
+ int security_socket_recvmsg(struct socket *sock, struct msghdr *msg,
+--
+1.9.1
+
diff --git a/recipes-kernel/linux/linux-yocto-4.1/ccs-tools-yocto_security.patch b/recipes-kernel/linux/linux-yocto-4.1/ccs-tools-yocto_security.patch
new file mode 100644
index 0000000..33a69a1
--- /dev/null
+++ b/recipes-kernel/linux/linux-yocto-4.1/ccs-tools-yocto_security.patch
@@ -0,0 +1,17920 @@
+From d4a329ee417f1b75ba087828bb4b2f62c1ef57bb Mon Sep 17 00:00:00 2001
+From: Auto Configured <auto.configured>
+Date: Sun, 25 Oct 2015 12:19:45 -0700
+Subject: [PATCH] Ci add ccsecuroty
+
+Signed-off-by: Auto Configured <auto.configured>
+---
+ include/linux/ccsecurity.h | 926 +++++
+ include/linux/lsm2ccsecurity.h | 181 +
+ security/ccsecurity/Config.in | 83 +
+ security/ccsecurity/Kconfig | 190 +
+ security/ccsecurity/Makefile | 122 +
+ security/ccsecurity/gc.c | 1036 ++++++
+ security/ccsecurity/internal.h | 2090 +++++++++++
+ security/ccsecurity/load_policy.c | 352 ++
+ security/ccsecurity/lsm2ccsecurity.c | 192 +
+ security/ccsecurity/memory.c | 356 ++
+ security/ccsecurity/permission.c | 5025 ++++++++++++++++++++++++++
+ security/ccsecurity/policy_io.c | 6484 ++++++++++++++++++++++++++++++++++
+ security/ccsecurity/realpath.c | 767 ++++
+ 13 files changed, 17804 insertions(+)
+ create mode 100644 include/linux/ccsecurity.h
+ create mode 100644 include/linux/lsm2ccsecurity.h
+ create mode 100644 security/ccsecurity/Config.in
+ create mode 100644 security/ccsecurity/Kconfig
+ create mode 100644 security/ccsecurity/Makefile
+ create mode 100644 security/ccsecurity/gc.c
+ create mode 100644 security/ccsecurity/internal.h
+ create mode 100644 security/ccsecurity/load_policy.c
+ create mode 100644 security/ccsecurity/lsm2ccsecurity.c
+ create mode 100644 security/ccsecurity/memory.c
+ create mode 100644 security/ccsecurity/permission.c
+ create mode 100644 security/ccsecurity/policy_io.c
+ create mode 100644 security/ccsecurity/realpath.c
+
+diff --git a/include/linux/ccsecurity.h b/include/linux/ccsecurity.h
+new file mode 100644
+index 0000000..6c1ca2b
+--- /dev/null
++++ b/include/linux/ccsecurity.h
+@@ -0,0 +1,926 @@
++/*
++ * include/linux/ccsecurity.h
++ *
++ * Copyright (C) 2005-2012 NTT DATA CORPORATION
++ *
++ * Version: 1.8.4 2015/05/05
++ */
++
++#ifndef _LINUX_CCSECURITY_H
++#define _LINUX_CCSECURITY_H
++
++#include <linux/version.h>
++
++#ifndef __user
++#define __user
++#endif
++
++struct nameidata;
++struct path;
++struct dentry;
++struct vfsmount;
++struct linux_binprm;
++struct pt_regs;
++struct file;
++struct ctl_table;
++struct socket;
++struct sockaddr;
++struct sock;
++struct sk_buff;
++struct msghdr;
++struct pid_namespace;
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 8, 0)
++int search_binary_handler(struct linux_binprm *bprm);
++#else
++int search_binary_handler(struct linux_binprm *bprm, struct pt_regs *regs);
++#endif
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 0, 0)
++#include <linux/lsm2ccsecurity.h>
++#endif
++
++#ifdef CONFIG_CCSECURITY
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36) && LINUX_VERSION_CODE < KERNEL_VERSION(3, 2, 0)
++/* Obtain prototype of __d_path(). */
++#include <linux/dcache.h>
++#endif
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0)
++/* Obtain definition of kuid_t and kgid_t. */
++#include <linux/uidgid.h>
++#endif
++
++/* For exporting variables and functions. */
++struct ccsecurity_exports {
++ void (*load_policy) (const char *filename);
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0) && defined(CONFIG_SECURITY)
++ void (*add_hooks) (void);
++#endif
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 2, 0)
++ char * (*d_absolute_path) (const struct path *, char *, int);
++#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36)
++ typeof(__d_path) (*__d_path);
++#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0)
++ spinlock_t *vfsmount_lock;
++#endif
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24)
++ struct task_struct * (*find_task_by_vpid) (pid_t nr);
++ struct task_struct * (*find_task_by_pid_ns) (pid_t nr,
++ struct pid_namespace *ns);
++#endif
++};
++
++/* For doing access control. */
++struct ccsecurity_operations {
++ void (*check_profile) (void);
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
++ int (*chroot_permission) (struct path *path);
++ int (*pivot_root_permission) (struct path *old_path,
++ struct path *new_path);
++ int (*mount_permission) (const char *dev_name, struct path *path,
++ const char *type, unsigned long flags,
++ void *data_page);
++#else
++ int (*chroot_permission) (struct nameidata *nd);
++ int (*pivot_root_permission) (struct nameidata *old_nd,
++ struct nameidata *new_nd);
++ int (*mount_permission) (const char *dev_name, struct nameidata *nd,
++ const char *type, unsigned long flags,
++ void *data_page);
++#endif
++ int (*umount_permission) (struct vfsmount *mnt, int flags);
++ _Bool (*lport_reserved) (const u16 port);
++#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 32)
++ void (*save_open_mode) (int mode);
++ void (*clear_open_mode) (void);
++ int (*open_permission) (struct dentry *dentry, struct vfsmount *mnt,
++ const int flag);
++#else
++ int (*open_permission) (struct file *file);
++#endif
++ int (*ptrace_permission) (long request, long pid);
++ int (*ioctl_permission) (struct file *filp, unsigned int cmd,
++ unsigned long arg);
++ int (*parse_table) (int __user *name, int nlen, void __user *oldval,
++ void __user *newval, struct ctl_table *table);
++ _Bool (*capable) (const u8 operation);
++ int (*mknod_permission) (struct dentry *dentry, struct vfsmount *mnt,
++ unsigned int mode, unsigned int dev);
++ int (*mkdir_permission) (struct dentry *dentry, struct vfsmount *mnt,
++ unsigned int mode);
++ int (*rmdir_permission) (struct dentry *dentry, struct vfsmount *mnt);
++ int (*unlink_permission) (struct dentry *dentry, struct vfsmount *mnt);
++ int (*symlink_permission) (struct dentry *dentry, struct vfsmount *mnt,
++ const char *from);
++ int (*truncate_permission) (struct dentry *dentry,
++ struct vfsmount *mnt);
++ int (*rename_permission) (struct dentry *old_dentry,
++ struct dentry *new_dentry,
++ struct vfsmount *mnt);
++ int (*link_permission) (struct dentry *old_dentry,
++ struct dentry *new_dentry,
++ struct vfsmount *mnt);
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30)
++ int (*open_exec_permission) (struct dentry *dentry,
++ struct vfsmount *mnt);
++ int (*uselib_permission) (struct dentry *dentry, struct vfsmount *mnt);
++#endif
++ int (*fcntl_permission) (struct file *file, unsigned int cmd,
++ unsigned long arg);
++ int (*kill_permission) (pid_t pid, int sig);
++ int (*tgkill_permission) (pid_t tgid, pid_t pid, int sig);
++ int (*tkill_permission) (pid_t pid, int sig);
++ int (*socket_create_permission) (int family, int type, int protocol);
++ int (*socket_listen_permission) (struct socket *sock);
++ int (*socket_connect_permission) (struct socket *sock,
++ struct sockaddr *addr, int addr_len);
++ int (*socket_bind_permission) (struct socket *sock,
++ struct sockaddr *addr, int addr_len);
++ int (*socket_post_accept_permission) (struct socket *sock,
++ struct socket *newsock);
++ int (*socket_sendmsg_permission) (struct socket *sock,
++ struct msghdr *msg, int size);
++ int (*socket_post_recvmsg_permission) (struct sock *sk,
++ struct sk_buff *skb, int flags);
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0)
++ int (*chown_permission) (struct dentry *dentry, struct vfsmount *mnt,
++ kuid_t user, kgid_t group);
++#else
++ int (*chown_permission) (struct dentry *dentry, struct vfsmount *mnt,
++ uid_t user, gid_t group);
++#endif
++ int (*chmod_permission) (struct dentry *dentry, struct vfsmount *mnt,
++ mode_t mode);
++ int (*getattr_permission) (struct vfsmount *mnt,
++ struct dentry *dentry);
++ int (*sigqueue_permission) (pid_t pid, int sig);
++ int (*tgsigqueue_permission) (pid_t tgid, pid_t pid, int sig);
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 8, 0)
++ int (*search_binary_handler) (struct linux_binprm *bprm);
++#else
++ int (*search_binary_handler) (struct linux_binprm *bprm,
++ struct pt_regs *regs);
++#endif
++#ifdef CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY
++ int (*alloc_task_security) (const struct task_struct *task);
++ void (*free_task_security) (const struct task_struct *task);
++#endif
++ _Bool disabled;
++};
++
++extern struct ccsecurity_operations ccsecurity_ops;
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
++
++static inline int ccs_chroot_permission(struct path *path)
++{
++ int (*func) (struct path *) = ccsecurity_ops.chroot_permission;
++ return func ? func(path) : 0;
++}
++
++static inline int ccs_pivot_root_permission(struct path *old_path,
++ struct path *new_path)
++{
++ int (*func) (struct path *, struct path *)
++ = ccsecurity_ops.pivot_root_permission;
++ return func ? func(old_path, new_path) : 0;
++}
++
++static inline int ccs_mount_permission(const char *dev_name, struct path *path,
++ const char *type, unsigned long flags,
++ void *data_page)
++{
++ int (*func) (const char *, struct path *, const char *, unsigned long,
++ void *) = ccsecurity_ops.mount_permission;
++ return func ? func(dev_name, path, type, flags, data_page) : 0;
++}
++
++#else
++
++static inline int ccs_chroot_permission(struct nameidata *nd)
++{
++ int (*func) (struct nameidata *) = ccsecurity_ops.chroot_permission;
++ return func ? func(nd) : 0;
++}
++
++static inline int ccs_pivot_root_permission(struct nameidata *old_nd,
++ struct nameidata *new_nd)
++{
++ int (*func) (struct nameidata *, struct nameidata *)
++ = ccsecurity_ops.pivot_root_permission;
++ return func ? func(old_nd, new_nd) : 0;
++}
++
++static inline int ccs_mount_permission(const char *dev_name,
++ struct nameidata *nd, const char *type,
++ unsigned long flags, void *data_page)
++{
++ int (*func) (const char *, struct nameidata *, const char *,
++ unsigned long, void *) = ccsecurity_ops.mount_permission;
++ return func ? func(dev_name, nd, type, flags, data_page) : 0;
++}
++
++#endif
++
++static inline int ccs_umount_permission(struct vfsmount *mnt, int flags)
++{
++ int (*func) (struct vfsmount *, int)
++ = ccsecurity_ops.umount_permission;
++ return func ? func(mnt, flags) : 0;
++}
++
++#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 32)
++
++static inline void ccs_save_open_mode(int mode)
++{
++ void (*func) (int) = ccsecurity_ops.save_open_mode;
++ if (func)
++ func(mode);
++}
++
++static inline void ccs_clear_open_mode(void)
++{
++ void (*func) (void) = ccsecurity_ops.clear_open_mode;
++ if (func)
++ func();
++}
++
++static inline int ccs_open_permission(struct dentry *dentry,
++ struct vfsmount *mnt, const int flag)
++{
++ int (*func) (struct dentry *, struct vfsmount *, const int)
++ = ccsecurity_ops.open_permission;
++ return func ? func(dentry, mnt, flag) : 0;
++}
++
++#else
++
++static inline int ccs_open_permission(struct file *filp)
++{
++ int (*func) (struct file *) = ccsecurity_ops.open_permission;
++ return func ? func(filp) : 0;
++}
++
++#endif
++
++static inline int ccs_fcntl_permission(struct file *file, unsigned int cmd,
++ unsigned long arg)
++{
++ int (*func) (struct file *, unsigned int, unsigned long)
++ = ccsecurity_ops.fcntl_permission;
++ return func ? func(file, cmd, arg) : 0;
++}
++
++static inline int ccs_ioctl_permission(struct file *filp, unsigned int cmd,
++ unsigned long arg)
++{
++ int (*func) (struct file *, unsigned int, unsigned long)
++ = ccsecurity_ops.ioctl_permission;
++ return func ? func(filp, cmd, arg) : 0;
++}
++
++static inline int ccs_parse_table(int __user *name, int nlen,
++ void __user *oldval, void __user *newval,
++ struct ctl_table *table)
++{
++ int (*func) (int __user *, int, void __user *, void __user *,
++ struct ctl_table *) = ccsecurity_ops.parse_table;
++ return func ? func(name, nlen, oldval, newval, table) : 0;
++}
++
++static inline int ccs_mknod_permission(struct dentry *dentry,
++ struct vfsmount *mnt, unsigned int mode,
++ unsigned int dev)
++{
++ int (*func) (struct dentry *, struct vfsmount *, unsigned int,
++ unsigned int) = ccsecurity_ops.mknod_permission;
++ return func ? func(dentry, mnt, mode, dev) : 0;
++}
++
++static inline int ccs_mkdir_permission(struct dentry *dentry,
++ struct vfsmount *mnt, unsigned int mode)
++{
++ int (*func) (struct dentry *, struct vfsmount *, unsigned int)
++ = ccsecurity_ops.mkdir_permission;
++ return func ? func(dentry, mnt, mode) : 0;
++}
++
++static inline int ccs_rmdir_permission(struct dentry *dentry,
++ struct vfsmount *mnt)
++{
++ int (*func) (struct dentry *, struct vfsmount *)
++ = ccsecurity_ops.rmdir_permission;
++ return func ? func(dentry, mnt) : 0;
++}
++
++static inline int ccs_unlink_permission(struct dentry *dentry,
++ struct vfsmount *mnt)
++{
++ int (*func) (struct dentry *, struct vfsmount *)
++ = ccsecurity_ops.unlink_permission;
++ return func ? func(dentry, mnt) : 0;
++}
++
++static inline int ccs_symlink_permission(struct dentry *dentry,
++ struct vfsmount *mnt,
++ const char *from)
++{
++ int (*func) (struct dentry *, struct vfsmount *, const char *)
++ = ccsecurity_ops.symlink_permission;
++ return func ? func(dentry, mnt, from) : 0;
++}
++
++static inline int ccs_truncate_permission(struct dentry *dentry,
++ struct vfsmount *mnt)
++{
++ int (*func) (struct dentry *, struct vfsmount *)
++ = ccsecurity_ops.truncate_permission;
++ return func ? func(dentry, mnt) : 0;
++}
++
++static inline int ccs_rename_permission(struct dentry *old_dentry,
++ struct dentry *new_dentry,
++ struct vfsmount *mnt)
++{
++ int (*func) (struct dentry *, struct dentry *, struct vfsmount *)
++ = ccsecurity_ops.rename_permission;
++ return func ? func(old_dentry, new_dentry, mnt) : 0;
++}
++
++static inline int ccs_link_permission(struct dentry *old_dentry,
++ struct dentry *new_dentry,
++ struct vfsmount *mnt)
++{
++ int (*func) (struct dentry *, struct dentry *, struct vfsmount *)
++ = ccsecurity_ops.link_permission;
++ return func ? func(old_dentry, new_dentry, mnt) : 0;
++}
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30)
++
++static inline int ccs_open_exec_permission(struct dentry *dentry,
++ struct vfsmount *mnt)
++{
++ int (*func) (struct dentry *, struct vfsmount *)
++ = ccsecurity_ops.open_exec_permission;
++ return func ? func(dentry, mnt) : 0;
++}
++
++static inline int ccs_uselib_permission(struct dentry *dentry,
++ struct vfsmount *mnt)
++{
++ int (*func) (struct dentry *, struct vfsmount *)
++ = ccsecurity_ops.uselib_permission;
++ return func ? func(dentry, mnt) : 0;
++}
++
++#endif
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0)
++
++static inline int ccs_chown_permission(struct dentry *dentry,
++ struct vfsmount *mnt, kuid_t user,
++ kgid_t group)
++{
++ int (*func) (struct dentry *, struct vfsmount *, kuid_t, kgid_t)
++ = ccsecurity_ops.chown_permission;
++ return func ? func(dentry, mnt, user, group) : 0;
++}
++
++#else
++
++static inline int ccs_chown_permission(struct dentry *dentry,
++ struct vfsmount *mnt, uid_t user,
++ gid_t group)
++{
++ int (*func) (struct dentry *, struct vfsmount *, uid_t, gid_t)
++ = ccsecurity_ops.chown_permission;
++ return func ? func(dentry, mnt, user, group) : 0;
++}
++
++#endif
++
++static inline int ccs_chmod_permission(struct dentry *dentry,
++ struct vfsmount *mnt, mode_t mode)
++{
++ int (*func) (struct dentry *, struct vfsmount *, mode_t)
++ = ccsecurity_ops.chmod_permission;
++ return func ? func(dentry, mnt, mode) : 0;
++}
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 8, 0)
++
++static inline int ccs_search_binary_handler(struct linux_binprm *bprm)
++{
++ return ccsecurity_ops.search_binary_handler(bprm);
++}
++
++#else
++
++static inline int ccs_search_binary_handler(struct linux_binprm *bprm,
++ struct pt_regs *regs)
++{
++ return ccsecurity_ops.search_binary_handler(bprm, regs);
++}
++
++#endif
++
++#else
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
++
++static inline int ccs_chroot_permission(struct path *path)
++{
++ return 0;
++}
++
++static inline int ccs_pivot_root_permission(struct path *old_path,
++ struct path *new_path)
++{
++ return 0;
++}
++
++static inline int ccs_mount_permission(const char *dev_name, struct path *path,
++ const char *type, unsigned long flags,
++ void *data_page)
++{
++ return 0;
++}
++
++#else
++
++static inline int ccs_chroot_permission(struct nameidata *nd)
++{
++ return 0;
++}
++
++static inline int ccs_pivot_root_permission(struct nameidata *old_nd,
++ struct nameidata *new_nd)
++{
++ return 0;
++}
++
++static inline int ccs_mount_permission(const char *dev_name,
++ struct nameidata *nd, const char *type,
++ unsigned long flags, void *data_page)
++{
++ return 0;
++}
++
++#endif
++
++static inline int ccs_umount_permission(struct vfsmount *mnt, int flags)
++{
++ return 0;
++}
++
++static inline void ccs_save_open_mode(int mode)
++{
++}
++
++static inline void ccs_clear_open_mode(void)
++{
++}
++
++#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 32)
++
++static inline int ccs_open_permission(struct dentry *dentry,
++ struct vfsmount *mnt, const int flag)
++{
++ return 0;
++}
++
++#else
++
++static inline int ccs_open_permission(struct file *filp)
++{
++ return 0;
++}
++
++#endif
++
++static inline int ccs_ioctl_permission(struct file *filp, unsigned int cmd,
++ unsigned long arg)
++{
++ return 0;
++}
++
++static inline int ccs_parse_table(int __user *name, int nlen,
++ void __user *oldval, void __user *newval,
++ struct ctl_table *table)
++{
++ return 0;
++}
++
++static inline int ccs_mknod_permission(struct dentry *dentry,
++ struct vfsmount *mnt, unsigned int mode,
++ unsigned int dev)
++{
++ return 0;
++}
++
++static inline int ccs_mkdir_permission(struct dentry *dentry,
++ struct vfsmount *mnt, unsigned int mode)
++{
++ return 0;
++}
++
++static inline int ccs_rmdir_permission(struct dentry *dentry,
++ struct vfsmount *mnt)
++{
++ return 0;
++}
++
++static inline int ccs_unlink_permission(struct dentry *dentry,
++ struct vfsmount *mnt)
++{
++ return 0;
++}
++
++static inline int ccs_symlink_permission(struct dentry *dentry,
++ struct vfsmount *mnt,
++ const char *from)
++{
++ return 0;
++}
++
++static inline int ccs_truncate_permission(struct dentry *dentry,
++ struct vfsmount *mnt)
++{
++ return 0;
++}
++
++static inline int ccs_rename_permission(struct dentry *old_dentry,
++ struct dentry *new_dentry,
++ struct vfsmount *mnt)
++{
++ return 0;
++}
++
++static inline int ccs_link_permission(struct dentry *old_dentry,
++ struct dentry *new_dentry,
++ struct vfsmount *mnt)
++{
++ return 0;
++}
++
++static inline int ccs_open_exec_permission(struct dentry *dentry,
++ struct vfsmount *mnt)
++{
++ return 0;
++}
++
++static inline int ccs_uselib_permission(struct dentry *dentry,
++ struct vfsmount *mnt)
++{
++ return 0;
++}
++
++static inline int ccs_fcntl_permission(struct file *file, unsigned int cmd,
++ unsigned long arg)
++{
++ return 0;
++}
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0)
++
++static inline int ccs_chown_permission(struct dentry *dentry,
++ struct vfsmount *mnt, kuid_t user,
++ kgid_t group)
++{
++ return 0;
++}
++
++#else
++
++static inline int ccs_chown_permission(struct dentry *dentry,
++ struct vfsmount *mnt, uid_t user,
++ gid_t group)
++{
++ return 0;
++}
++
++#endif
++
++static inline int ccs_chmod_permission(struct dentry *dentry,
++ struct vfsmount *mnt, mode_t mode)
++{
++ return 0;
++}
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 8, 0)
++
++static inline int ccs_search_binary_handler(struct linux_binprm *bprm)
++{
++ return search_binary_handler(bprm);
++}
++
++#else
++
++static inline int ccs_search_binary_handler(struct linux_binprm *bprm,
++ struct pt_regs *regs)
++{
++ return search_binary_handler(bprm, regs);
++}
++
++#endif
++
++#endif
++
++#ifdef CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY
++
++static inline int ccs_alloc_task_security(const struct task_struct *task)
++{
++ int (*func) (const struct task_struct *)
++ = ccsecurity_ops.alloc_task_security;
++ return func ? func(task) : 0;
++}
++
++static inline void ccs_free_task_security(const struct task_struct *task)
++{
++ void (*func) (const struct task_struct *)
++ = ccsecurity_ops.free_task_security;
++ if (func)
++ func(task);
++}
++
++#else
++
++static inline int ccs_alloc_task_security(const struct task_struct *task)
++{
++ return 0;
++}
++
++static inline void ccs_free_task_security(const struct task_struct *task)
++{
++}
++
++#endif
++
++#ifdef CONFIG_CCSECURITY_FILE_GETATTR
++
++static inline int ccs_getattr_permission(struct vfsmount *mnt,
++ struct dentry *dentry)
++{
++ int (*func) (struct vfsmount *, struct dentry *)
++ = ccsecurity_ops.getattr_permission;
++ return func ? func(mnt, dentry) : 0;
++}
++
++#else
++
++static inline int ccs_getattr_permission(struct vfsmount *mnt,
++ struct dentry *dentry)
++{
++ return 0;
++}
++
++#endif
++
++#ifdef CONFIG_CCSECURITY_NETWORK
++
++static inline int ccs_socket_listen_permission(struct socket *sock)
++{
++ int (*func) (struct socket *)
++ = ccsecurity_ops.socket_listen_permission;
++ return func ? func(sock) : 0;
++}
++
++static inline int ccs_socket_connect_permission(struct socket *sock,
++ struct sockaddr *addr,
++ int addr_len)
++{
++ int (*func) (struct socket *, struct sockaddr *, int)
++ = ccsecurity_ops.socket_connect_permission;
++ return func ? func(sock, addr, addr_len) : 0;
++}
++
++static inline int ccs_socket_bind_permission(struct socket *sock,
++ struct sockaddr *addr,
++ int addr_len)
++{
++ int (*func) (struct socket *, struct sockaddr *, int)
++ = ccsecurity_ops.socket_bind_permission;
++ return func ? func(sock, addr, addr_len) : 0;
++}
++
++static inline int ccs_socket_post_accept_permission(struct socket *sock,
++ struct socket *newsock)
++{
++ int (*func) (struct socket *, struct socket *)
++ = ccsecurity_ops.socket_post_accept_permission;
++ return func ? func(sock, newsock) : 0;
++}
++
++static inline int ccs_socket_sendmsg_permission(struct socket *sock,
++ struct msghdr *msg,
++ int size)
++{
++ int (*func) (struct socket *, struct msghdr *, int)
++ = ccsecurity_ops.socket_sendmsg_permission;
++ return func ? func(sock, msg, size) : 0;
++}
++
++#else
++
++static inline int ccs_socket_listen_permission(struct socket *sock)
++{
++ return 0;
++}
++
++static inline int ccs_socket_connect_permission(struct socket *sock,
++ struct sockaddr *addr,
++ int addr_len)
++{
++ return 0;
++}
++
++static inline int ccs_socket_bind_permission(struct socket *sock,
++ struct sockaddr *addr,
++ int addr_len)
++{
++ return 0;
++}
++
++static inline int ccs_socket_post_accept_permission(struct socket *sock,
++ struct socket *newsock)
++{
++ return 0;
++}
++
++static inline int ccs_socket_sendmsg_permission(struct socket *sock,
++ struct msghdr *msg,
++ int size)
++{
++ return 0;
++}
++
++#endif
++
++#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
++
++static inline int ccs_socket_post_recvmsg_permission(struct sock *sk,
++ struct sk_buff *skb,
++ int flags)
++{
++ int (*func) (struct sock *, struct sk_buff *, int)
++ = ccsecurity_ops.socket_post_recvmsg_permission;
++ return func ? func(sk, skb, flags) : 0;
++}
++
++#else
++
++static inline int ccs_socket_post_recvmsg_permission(struct sock *sk,
++ struct sk_buff *skb,
++ int flags)
++{
++ return 0;
++}
++
++#endif
++
++#ifdef CONFIG_CCSECURITY_PORTRESERVE
++
++static inline _Bool ccs_lport_reserved(const u16 port)
++{
++ _Bool (*func) (const u16) = ccsecurity_ops.lport_reserved;
++ return func ? func(port) : 0;
++}
++
++#else
++
++static inline _Bool ccs_lport_reserved(const u16 port)
++{
++ return 0;
++}
++
++#endif
++
++#ifdef CONFIG_CCSECURITY_CAPABILITY
++
++static inline _Bool ccs_capable(const u8 operation)
++{
++ _Bool (*func) (const u8) = ccsecurity_ops.capable;
++ return func ? func(operation) : 1;
++}
++
++static inline int ccs_socket_create_permission(int family, int type,
++ int protocol)
++{
++ int (*func) (int, int, int) = ccsecurity_ops.socket_create_permission;
++ return func ? func(family, type, protocol) : 0;
++}
++
++static inline int ccs_ptrace_permission(long request, long pid)
++{
++ int (*func) (long, long) = ccsecurity_ops.ptrace_permission;
++ return func ? func(request, pid) : 0;
++}
++
++#else
++
++static inline _Bool ccs_capable(const u8 operation)
++{
++ return 1;
++}
++
++static inline int ccs_socket_create_permission(int family, int type,
++ int protocol)
++{
++ return 0;
++}
++
++static inline int ccs_ptrace_permission(long request, long pid)
++{
++ return 0;
++}
++
++#endif
++
++#ifdef CONFIG_CCSECURITY_IPC
++
++static inline int ccs_kill_permission(pid_t pid, int sig)
++{
++ int (*func) (pid_t, int) = ccsecurity_ops.kill_permission;
++ return func ? func(pid, sig) : 0;
++}
++
++static inline int ccs_tgkill_permission(pid_t tgid, pid_t pid, int sig)
++{
++ int (*func) (pid_t, pid_t, int) = ccsecurity_ops.tgkill_permission;
++ return func ? func(tgid, pid, sig) : 0;
++}
++
++static inline int ccs_tkill_permission(pid_t pid, int sig)
++{
++ int (*func) (pid_t, int) = ccsecurity_ops.tkill_permission;
++ return func ? func(pid, sig) : 0;
++}
++
++static inline int ccs_sigqueue_permission(pid_t pid, int sig)
++{
++ int (*func) (pid_t, int) = ccsecurity_ops.sigqueue_permission;
++ return func ? func(pid, sig) : 0;
++}
++
++static inline int ccs_tgsigqueue_permission(pid_t tgid, pid_t pid, int sig)
++{
++ int (*func) (pid_t, pid_t, int) = ccsecurity_ops.tgsigqueue_permission;
++ return func ? func(tgid, pid, sig) : 0;
++}
++
++#else
++
++static inline int ccs_kill_permission(pid_t pid, int sig)
++{
++ return 0;
++}
++
++static inline int ccs_tgkill_permission(pid_t tgid, pid_t pid, int sig)
++{
++ return 0;
++}
++
++static inline int ccs_tkill_permission(pid_t pid, int sig)
++{
++ return 0;
++}
++
++static inline int ccs_sigqueue_permission(pid_t pid, int sig)
++{
++ return 0;
++}
++
++static inline int ccs_tgsigqueue_permission(pid_t tgid, pid_t pid, int sig)
++{
++ return 0;
++}
++
++#endif
++
++/* Index numbers for Capability Controls. */
++enum ccs_capability_acl_index {
++ /* socket(PF_ROUTE, *, *) */
++ CCS_USE_ROUTE_SOCKET,
++ /* socket(PF_PACKET, *, *) */
++ CCS_USE_PACKET_SOCKET,
++ /* sys_reboot() */
++ CCS_SYS_REBOOT,
++ /* sys_vhangup() */
++ CCS_SYS_VHANGUP,
++ /* do_settimeofday(), sys_adjtimex() */
++ CCS_SYS_SETTIME,
++ /* sys_nice(), sys_setpriority() */
++ CCS_SYS_NICE,
++ /* sys_sethostname(), sys_setdomainname() */
++ CCS_SYS_SETHOSTNAME,
++ /* sys_create_module(), sys_init_module(), sys_delete_module() */
++ CCS_USE_KERNEL_MODULE,
++ /* sys_kexec_load() */
++ CCS_SYS_KEXEC_LOAD,
++ /* sys_ptrace() */
++ CCS_SYS_PTRACE,
++ CCS_MAX_CAPABILITY_INDEX
++};
++
++#endif
+diff --git a/include/linux/lsm2ccsecurity.h b/include/linux/lsm2ccsecurity.h
+new file mode 100644
+index 0000000..ab4ea5c
+--- /dev/null
++++ b/include/linux/lsm2ccsecurity.h
+@@ -0,0 +1,181 @@
++/*
++ * include/linux/lsm2ccsecurity.h
++ *
++ * Copyright (C) 2005-2012 NTT DATA CORPORATION
++ *
++ * Version: 1.8.4 2015/07/11
++ */
++
++#ifndef _LINUX_LSM2CCSECURITY_H
++#define _LINUX_LSM2CCSECURITY_H
++
++#include <linux/version.h>
++#include <linux/uidgid.h>
++
++#ifdef CONFIG_CCSECURITY
++
++int ccs_settime(const struct timespec *ts, const struct timezone *tz);
++int ccs_sb_mount(const char *dev_name, struct path *path, const char *type,
++ unsigned long flags, void *data);
++int ccs_sb_umount(struct vfsmount *mnt, int flags);
++int ccs_sb_pivotroot(struct path *old_path, struct path *new_path);
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 1, 0)
++int ccs_inode_getattr(struct vfsmount *mnt, struct dentry *dentry);
++#else
++int ccs_inode_getattr(const struct path *path);
++#endif
++int ccs_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
++int ccs_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg);
++int ccs_file_open(struct file *file, const struct cred *cred);
++int ccs_socket_create(int family, int type, int protocol, int kern);
++int ccs_socket_bind(struct socket *sock, struct sockaddr *address,
++ int addrlen);
++int ccs_socket_connect(struct socket *sock, struct sockaddr *address,
++ int addrlen);
++int ccs_socket_listen(struct socket *sock, int backlog);
++int ccs_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size);
++int ccs_path_unlink(struct path *dir, struct dentry *dentry);
++int ccs_path_mkdir(struct path *dir, struct dentry *dentry, umode_t mode);
++int ccs_path_rmdir(struct path *dir, struct dentry *dentry);
++int ccs_path_mknod(struct path *dir, struct dentry *dentry, umode_t mode,
++ unsigned int dev);
++int ccs_path_truncate(struct path *path);
++int ccs_path_symlink(struct path *dir, struct dentry *dentry,
++ const char *old_name);
++int ccs_path_link(struct dentry *old_dentry, struct path *new_dir,
++ struct dentry *new_dentry);
++int ccs_path_rename(struct path *old_dir, struct dentry *old_dentry,
++ struct path *new_dir, struct dentry *new_dentry);
++int ccs_path_chmod(struct path *path, umode_t mode);
++int ccs_path_chown(struct path *path, kuid_t uid, kgid_t gid);
++int ccs_path_chroot(struct path *path);
++
++#else
++
++static inline int ccs_settime(const struct timespec *ts,
++ const struct timezone *tz)
++{
++ return 0;
++}
++static inline int ccs_sb_mount(const char *dev_name, struct path *path,
++ const char *type, unsigned long flags,
++ void *data)
++{
++ return 0;
++}
++static inline int ccs_sb_umount(struct vfsmount *mnt, int flags)
++{
++ return 0;
++}
++static inline int ccs_sb_pivotroot(struct path *old_path,
++ struct path *new_path)
++{
++ return 0;
++}
++#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 1, 0)
++static inline int ccs_inode_getattr(struct vfsmount *mnt,
++ struct dentry *dentry)
++{
++ return 0;
++}
++#else
++static inline int ccs_inode_getattr(const struct path *path)
++{
++ return 0;
++}
++#endif
++static inline int ccs_file_ioctl(struct file *file, unsigned int cmd,
++ unsigned long arg)
++{
++ return 0;
++}
++static inline int ccs_file_fcntl(struct file *file, unsigned int cmd,
++ unsigned long arg)
++{
++ return 0;
++}
++static inline int ccs_file_open(struct file *file, const struct cred *cred)
++{
++ return 0;
++}
++static inline int ccs_socket_create(int family, int type, int protocol,
++ int kern)
++{
++ return 0;
++}
++static inline int ccs_socket_bind(struct socket *sock,
++ struct sockaddr *address, int addrlen)
++{
++ return 0;
++}
++static inline int ccs_socket_connect(struct socket *sock,
++ struct sockaddr *address, int addrlen)
++{
++ return 0;
++}
++static inline int ccs_socket_listen(struct socket *sock, int backlog)
++{
++ return 0;
++}
++static inline int ccs_socket_sendmsg(struct socket *sock, struct msghdr *msg,
++ int size)
++{
++ return 0;
++}
++static inline int ccs_path_unlink(struct path *dir, struct dentry *dentry)
++{
++ return 0;
++}
++static inline int ccs_path_mkdir(struct path *dir, struct dentry *dentry,
++ umode_t mode)
++{
++ return 0;
++}
++static inline int ccs_path_rmdir(struct path *dir, struct dentry *dentry)
++{
++ return 0;
++}
++static inline int ccs_path_mknod(struct path *dir, struct dentry *dentry,
++ umode_t mode, unsigned int dev)
++{
++ return 0;
++}
++static inline int ccs_path_truncate(struct path *path)
++{
++ return 0;
++}
++static inline int ccs_path_symlink(struct path *dir, struct dentry *dentry,
++ const char *old_name)
++{
++ return 0;
++}
++static inline int ccs_path_link(struct dentry *old_dentry,
++ struct path *new_dir,
++ struct dentry *new_dentry)
++{
++ return 0;
++}
++static inline int ccs_path_rename(struct path *old_dir,
++ struct dentry *old_dentry,
++ struct path *new_dir,
++ struct dentry *new_dentry)
++{
++ return 0;
++}
++static inline int ccs_path_chmod(struct path *path, umode_t mode)
++{
++ return 0;
++}
++static inline int ccs_path_chown(struct path *path, kuid_t uid, kgid_t gid)
++{
++ return 0;
++}
++static inline int ccs_path_chroot(struct path *path)
++{
++ return 0;
++}
++
++#endif /* defined(CONFIG_CCSECURITY) */
++
++#endif /* !defined(_LINUX_LSM2CCSECURITY_H) */
+diff --git a/security/ccsecurity/Config.in b/security/ccsecurity/Config.in
+new file mode 100644
+index 0000000..da39bad6
+--- /dev/null
++++ b/security/ccsecurity/Config.in
+@@ -0,0 +1,83 @@
++#
++# Mandatory Access Control configuration
++#
++mainmenu_option next_comment
++comment 'Security options'
++
++[ -z "$CONFIG_CCSECURITY" ] && define_bool CONFIG_CCSECURITY y
++bool 'CCSecurity support' CONFIG_CCSECURITY
++
++if [ "$CONFIG_CCSECURITY" = "y" ]; then
++
++ [ -z "$CONFIG_CCSECURITY_LKM" ] && define_bool CONFIG_CCSECURITY_LKM n
++ bool 'Compile as loadable kernel module' CONFIG_CCSECURITY_LKM
++
++ [ -z "$CONFIG_CCSECURITY_DISABLE_BY_DEFAULT" ] && define_bool CONFIG_CCSECURITY_DISABLE_BY_DEFAULT n
++ bool 'Disable by default' CONFIG_CCSECURITY_DISABLE_BY_DEFAULT
++
++ [ -z "$CONFIG_CCSECURITY_MAX_ACCEPT_ENTRY" ] && define_int CONFIG_CCSECURITY_MAX_ACCEPT_ENTRY 2048
++ [ $CONFIG_CCSECURITY_MAX_ACCEPT_ENTRY -lt 0 ] && define_int CONFIG_CCSECURITY_MAX_ACCEPT_ENTRY 0
++ int 'Default maximal count for learning mode' CONFIG_CCSECURITY_MAX_ACCEPT_ENTRY
++
++ [ -z "$CONFIG_CCSECURITY_MAX_AUDIT_LOG" ] && define_int CONFIG_CCSECURITY_MAX_AUDIT_LOG 1024
++ [ $CONFIG_CCSECURITY_MAX_AUDIT_LOG -lt 0 ] && define_int CONFIG_CCSECURITY_MAX_AUDIT_LOG 0
++ int 'Default maximal count for audit log' CONFIG_CCSECURITY_MAX_AUDIT_LOG
++
++ [ -z "$CONFIG_CCSECURITY_OMIT_USERSPACE_LOADER" ] && define_bool CONFIG_CCSECURITY_OMIT_USERSPACE_LOADER n
++ bool 'Activate without calling userspace policy loader.' CONFIG_CCSECURITY_OMIT_USERSPACE_LOADER
++
++ if [ "$CONFIG_CCSECURITY_OMIT_USERSPACE_LOADER" = "n" ]; then
++
++ define_string CONFIG_CCSECURITY_POLICY_LOADER "/sbin/ccs-init"
++ string 'Location of userspace policy loader' CONFIG_CCSECURITY_POLICY_LOADER "/sbin/ccs-init"
++
++ define_string CONFIG_CCSECURITY_ACTIVATION_TRIGGER "/sbin/init"
++ string 'Trigger for calling userspace policy loader' CONFIG_CCSECURITY_ACTIVATION_TRIGGER "/sbin/init"
++
++ fi
++
++ [ -z "$CONFIG_CCSECURITY_FILE_READDIR" ] && define_bool CONFIG_CCSECURITY_FILE_READDIR y
++ bool "Enable readdir operation restriction." CONFIG_CCSECURITY_FILE_READDIR
++
++ [ -z "$CONFIG_CCSECURITY_FILE_GETATTR" ] && define_bool CONFIG_CCSECURITY_FILE_GETATTR y
++ bool "Enable getattr operation restriction." CONFIG_CCSECURITY_FILE_GETATTR
++
++ if [ "$CONFIG_NET" = "y" ]; then
++
++ [ -z "$CONFIG_CCSECURITY_NETWORK" ] && define_bool CONFIG_CCSECURITY_NETWORK y
++ bool "Enable socket operation restriction." CONFIG_CCSECURITY_NETWORK
++
++ if [ "$CONFIG_CCSECURITY_NETWORK" = "y" ]; then
++
++ #[ -z "$CONFIG_CCSECURITY_NETWORK_RECVMSG" ] &&
++ define_bool CONFIG_CCSECURITY_NETWORK_RECVMSG y
++
++ fi
++
++ fi
++
++ [ -z "$CONFIG_CCSECURITY_CAPABILITY" ] && define_bool CONFIG_CCSECURITY_CAPABILITY y
++ bool "Enable non-POSIX capability operation restriction." CONFIG_CCSECURITY_CAPABILITY
++
++ [ -z "$CONFIG_CCSECURITY_IPC" ] && define_bool CONFIG_CCSECURITY_IPC y
++ bool "Enable IPC operation restriction." CONFIG_CCSECURITY_IPC
++
++ [ -z "$CONFIG_CCSECURITY_MISC" ] && define_bool CONFIG_CCSECURITY_MISC y
++ bool "Enable environment variable names restriction." CONFIG_CCSECURITY_MISC
++
++ [ -z "$CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER" ] && define_bool CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER y
++ bool "Enable execute handler functionality." CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
++
++ [ -z "$CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION" ] && define_bool CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION y
++ bool "Enable domain transition without program execution request." CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
++
++ if [ "$CONFIG_NET" = "y" ]; then
++
++ [ -z "$CONFIG_CCSECURITY_PORTRESERVE" ] && define_bool CONFIG_CCSECURITY_PORTRESERVE y
++ bool "Enable local port reserver." CONFIG_CCSECURITY_PORTRESERVE
++
++ fi
++
++fi
++
++endmenu
+diff --git a/security/ccsecurity/Kconfig b/security/ccsecurity/Kconfig
+new file mode 100644
+index 0000000..8d7b200
+--- /dev/null
++++ b/security/ccsecurity/Kconfig
+@@ -0,0 +1,190 @@
++config CCSECURITY
++ bool "CCSecurity support"
++ default y
++ help
++ Say Y here to support non-LSM version of TOMOYO Linux.
++ http://tomoyo.osdn.jp/
++
++config CCSECURITY_LKM
++ bool "Compile as loadable kernel module"
++ default n
++ depends on CCSECURITY && MODULES
++ help
++ This version of TOMOYO depends on patching the kernel source in order
++ to insert some hooks which LSM does not provide. Therefore,
++ recompiling the kernel is inevitable. But if you want to keep
++ vmlinux's size as small as possible, you can compile most part of
++ TOMOYO as a loadable kernel module by saying Y here.
++
++config CCSECURITY_DISABLE_BY_DEFAULT
++ bool "Disable by default"
++ default n
++ depends on CCSECURITY
++ help
++ Say Y here if you want TOMOYO disabled by default.
++ To enable TOMOYO, pass ccsecurity=on to kernel command line.
++ To disable TOMOYO, pass ccsecurity=off to kernel command line.
++
++config CCSECURITY_USE_EXTERNAL_TASK_SECURITY
++ bool "Do not modify 'struct task_struct' in order to keep KABI"
++ default n
++ depends on CCSECURITY
++ help
++ Say Y here if you want to keep KABI for prebuilt kernel modules
++ unchanged. TOMOYO needs "struct ccs_domain_info *" and "u32" for each
++ "struct task_struct". But embedding these variables into
++ "struct task_struct" breaks KABI for prebuilt kernel modules (which
++ means that you will need to rebuild prebuilt kernel modules).
++ If you say Y here, these variables are managed outside
++ "struct task_struct" rather than embedding into "struct task_struct",
++ but accessing these variables becomes slower because lookup operation
++ is performed every time the current thread needs to access them.
++
++config CCSECURITY_MAX_ACCEPT_ENTRY
++ int "Default maximal count for learning mode"
++ default 2048
++ range 0 2147483647
++ depends on CCSECURITY
++ help
++ This is the default value for maximal ACL entries
++ that are automatically appended into policy at "learning mode".
++ Some programs access thousands of objects, so running
++ such programs in "learning mode" dulls the system response
++ and consumes much memory.
++ This is the safeguard for such programs.
++
++config CCSECURITY_MAX_AUDIT_LOG
++ int "Default maximal count for audit log"
++ default 1024
++ range 0 2147483647
++ depends on CCSECURITY
++ help
++ This is the default value for maximal entries for
++ audit logs that the kernel can hold on memory.
++ You can read the log via /proc/ccs/audit.
++ If you don't need audit logs, you may set this value to 0.
++
++config CCSECURITY_OMIT_USERSPACE_LOADER
++ bool "Activate without calling userspace policy loader."
++ default n
++ depends on CCSECURITY
++ ---help---
++ Say Y here if you want to activate access control as soon as built-in
++ policy was loaded. This option will be useful for systems where
++ operations which can lead to the hijacking of the boot sequence are
++ needed before loading the policy. For example, you can activate
++ immediately after loading the fixed part of policy which will allow
++ only operations needed for mounting a partition which contains the
++ variant part of policy and verifying (e.g. running GPG check) and
++ loading the variant part of policy. Since you can start using
++ enforcing mode from the beginning, you can reduce the possibility of
++ hijacking the boot sequence.
++
++ If you say Y to both "Compile as loadable kernel module" option and
++ "Activate without calling userspace policy loader." option, be sure
++ to excplicitly load the kernel module from the userspace, for
++ the kernel will not call /sbin/ccs-init when /sbin/init starts.
++
++config CCSECURITY_POLICY_LOADER
++ string "Location of userspace policy loader"
++ default "/sbin/ccs-init"
++ depends on CCSECURITY
++ depends on !CCSECURITY_OMIT_USERSPACE_LOADER
++ ---help---
++ This is the default pathname of policy loader which is called before
++ activation. You can override this setting via CCS_loader= kernel
++ command line option.
++
++config CCSECURITY_ACTIVATION_TRIGGER
++ string "Trigger for calling userspace policy loader"
++ default "/sbin/init"
++ depends on CCSECURITY
++ depends on !CCSECURITY_OMIT_USERSPACE_LOADER
++ ---help---
++ This is the default pathname of activation trigger.
++ You can override this setting via CCS_trigger= kernel command line
++ option. For example, if you pass init=/bin/systemd option, you may
++ want to also pass CCS_trigger=/bin/systemd option.
++
++ Say Y here if you want to enable only specific functionality in order
++ to reduce object file size.
++
++config CCSECURITY_FILE_READDIR
++ bool "Enable readdir operation restriction."
++ default y
++ depends on CCSECURITY
++ ---help---
++ Say Y here if you want to enable analysis/restriction of opening
++ directories for reading. Reading directory entries is a commonly
++ requested operation and damage caused by not restricting it as MAC
++ might be acceptable for you.
++
++config CCSECURITY_FILE_GETATTR
++ bool "Enable getattr operation restriction."
++ default y
++ depends on CCSECURITY
++ ---help---
++ Say Y here if you want to enable analysis/restriction of getting
++ information of files. Getting file's information is a commonly
++ requested operation and damage caused by not restricting it as MAC
++ might be acceptable for you.
++
++config CCSECURITY_NETWORK
++ bool "Enable socket operation restriction."
++ default y
++ depends on NET
++ depends on CCSECURITY
++ ---help---
++ Say Y here if you want to enable analysis/restriction of INET and
++ UNIX domain socket's operations.
++
++config CCSECURITY_CAPABILITY
++ bool "Enable non-POSIX capability operation restriction."
++ default y
++ depends on CCSECURITY
++ ---help---
++ Say Y here if you want to enable analysis/restriction of non-POSIX
++ capabilities.
++
++config CCSECURITY_IPC
++ bool "Enable IPC operation restriction."
++ default y
++ depends on CCSECURITY
++ ---help---
++ Say Y here if you want to enable analysis/restriction of sending
++ signals.
++
++config CCSECURITY_MISC
++ bool "Enable environment variable names restriction."
++ default y
++ depends on CCSECURITY
++ ---help---
++ Say Y here if you want to enable analysis/restriction of environment
++ variable names passed upon program execution request.
++
++config CCSECURITY_TASK_EXECUTE_HANDLER
++ bool "Enable execute handler functionality."
++ default y
++ depends on CCSECURITY
++ ---help---
++ Say Y here if you want to enable execute handler functionality.
++
++config CCSECURITY_TASK_DOMAIN_TRANSITION
++ bool "Enable domain transition without program execution request."
++ default y
++ depends on CCSECURITY
++ ---help---
++ Say Y here if you want to enable domain transition without involving
++ program execution request.
++
++config CCSECURITY_PORTRESERVE
++ bool "Enable local port reserver."
++ default y
++ depends on NET
++ depends on CCSECURITY
++ ---help---
++ Say Y here if you want to implement
++ /proc/sys/net/ipv4/ip_local_reserved_ports as a MAC policy.
++
++config CCSECURITY_NETWORK_RECVMSG
++ def_bool CCSECURITY_NETWORK
+diff --git a/security/ccsecurity/Makefile b/security/ccsecurity/Makefile
+new file mode 100644
+index 0000000..79c3632
+--- /dev/null
++++ b/security/ccsecurity/Makefile
+@@ -0,0 +1,122 @@
++ccsecurity-objs := permission.o gc.o memory.o policy_io.o realpath.o
++
++ifeq ($(VERSION)$(PATCHLEVEL),24)
++
++ifdef CONFIG_CCSECURITY
++O_TARGET := ccsecurity.o
++ifdef CONFIG_CCSECURITY_LKM
++all_targets: load_policy.o
++obj-m := ccsecurity.o
++obj-y := $(ccsecurity-objs)
++else
++all_targets: ccsecurity.o
++obj-y := load_policy.o $(ccsecurity-objs)
++endif
++export-objs := load_policy.o
++endif
++include $(TOPDIR)/Rules.make
++
++policy/profile.conf:
++ @mkdir -p policy/
++ @echo Creating an empty policy/profile.conf
++ @touch $@
++
++policy/exception_policy.conf:
++ @mkdir -p policy/
++ @echo Creating a default policy/exception_policy.conf
++ @echo initialize_domain /sbin/modprobe from any >> $@
++ @echo initialize_domain /sbin/hotplug from any >> $@
++
++policy/domain_policy.conf:
++ @mkdir -p policy/
++ @echo Creating an empty policy/domain_policy.conf
++ @touch $@
++
++policy/manager.conf:
++ @mkdir -p policy/
++ @echo Creating an empty policy/manager.conf
++ @touch $@
++
++policy/stat.conf:
++ @mkdir -p policy/
++ @echo Creating an empty policy/stat.conf
++ @touch $@
++
++builtin-policy.h: policy/profile.conf policy/exception_policy.conf policy/domain_policy.conf policy/manager.conf policy/stat.conf
++ @echo Generating built-in policy for TOMOYO 1.8.x.
++ @echo "static char ccs_builtin_profile[] __initdata =" > $@.tmp
++ @sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < policy/profile.conf >> $@.tmp
++ @echo "\"\";" >> $@.tmp
++ @echo "static char ccs_builtin_exception_policy[] __initdata =" >> $@.tmp
++ @sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < policy/exception_policy.conf >> $@.tmp
++ @echo "\"\";" >> $@.tmp
++ @echo "static char ccs_builtin_domain_policy[] __initdata =" >> $@.tmp
++ @sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < policy/domain_policy.conf >> $@.tmp
++ @echo "\"\";" >> $@.tmp
++ @echo "static char ccs_builtin_manager[] __initdata =" >> $@.tmp
++ @sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < policy/manager.conf >> $@.tmp
++ @echo "\"\";" >> $@.tmp
++ @echo "static char ccs_builtin_stat[] __initdata =" >> $@.tmp
++ @sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < policy/stat.conf >> $@.tmp
++ @echo "\"\";" >> $@.tmp
++ @mv $@.tmp $@
++
++policy_io.o: builtin-policy.h
++
++else
++
++obj-y += load_policy.o
++ifdef CONFIG_CCSECURITY_LKM
++obj-m += ccsecurity.o
++else
++obj-y += ccsecurity.o
++endif
++
++$(obj)/policy/profile.conf:
++ @mkdir -p $(obj)/policy/
++ @echo Creating an empty policy/profile.conf
++ @touch $@
++
++$(obj)/policy/exception_policy.conf:
++ @mkdir -p $(obj)/policy/
++ @echo Creating a default policy/exception_policy.conf
++ @echo initialize_domain /sbin/modprobe from any >> $@
++ @echo initialize_domain /sbin/hotplug from any >> $@
++
++$(obj)/policy/domain_policy.conf:
++ @mkdir -p $(obj)/policy/
++ @echo Creating an empty policy/domain_policy.conf
++ @touch $@
++
++$(obj)/policy/manager.conf:
++ @mkdir -p $(obj)/policy/
++ @echo Creating an empty policy/manager.conf
++ @touch $@
++
++$(obj)/policy/stat.conf:
++ @mkdir -p $(obj)/policy/
++ @echo Creating an empty policy/stat.conf
++ @touch $@
++
++$(obj)/builtin-policy.h: $(obj)/policy/profile.conf $(obj)/policy/exception_policy.conf $(obj)/policy/domain_policy.conf $(obj)/policy/manager.conf $(obj)/policy/stat.conf
++ @echo Generating built-in policy for TOMOYO 1.8.x.
++ @echo "static char ccs_builtin_profile[] __initdata =" > $@.tmp
++ @sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < $(obj)/policy/profile.conf >> $@.tmp
++ @echo "\"\";" >> $@.tmp
++ @echo "static char ccs_builtin_exception_policy[] __initdata =" >> $@.tmp
++ @sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < $(obj)/policy/exception_policy.conf >> $@.tmp
++ @echo "\"\";" >> $@.tmp
++ @echo "static char ccs_builtin_domain_policy[] __initdata =" >> $@.tmp
++ @sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < $(obj)/policy/domain_policy.conf >> $@.tmp
++ @echo "\"\";" >> $@.tmp
++ @echo "static char ccs_builtin_manager[] __initdata =" >> $@.tmp
++ @sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < $(obj)/policy/manager.conf >> $@.tmp
++ @echo "\"\";" >> $@.tmp
++ @echo "static char ccs_builtin_stat[] __initdata =" >> $@.tmp
++ @sed -e 's/\\/\\\\/g' -e 's/\"/\\"/g' -e 's/\(.*\)/"\1\\n"/' < $(obj)/policy/stat.conf >> $@.tmp
++ @echo "\"\";" >> $@.tmp
++ @mv $@.tmp $@
++
++$(obj)/policy_io.o: $(obj)/builtin-policy.h
++
++endif
+diff --git a/security/ccsecurity/gc.c b/security/ccsecurity/gc.c
+new file mode 100644
+index 0000000..0a578ab
+--- /dev/null
++++ b/security/ccsecurity/gc.c
+@@ -0,0 +1,1036 @@
++/*
++ * security/ccsecurity/gc.c
++ *
++ * Copyright (C) 2005-2012 NTT DATA CORPORATION
++ *
++ * Version: 1.8.4 2015/05/05
++ */
++
++#include "internal.h"
++
++/***** SECTION1: Constants definition *****/
++
++/* For compatibility with older kernels. */
++#ifndef for_each_process
++#define for_each_process for_each_task
++#endif
++
++/* The list for "struct ccs_io_buffer". */
++static LIST_HEAD(ccs_io_buffer_list);
++/* Lock for protecting ccs_io_buffer_list. */
++static DEFINE_SPINLOCK(ccs_io_buffer_list_lock);
++
++/***** SECTION2: Structure definition *****/
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)
++
++/*
++ * Lock for syscall users.
++ *
++ * This lock is used for protecting single SRCU section for 2.6.18 and
++ * earlier kernels because they don't have SRCU support.
++ */
++struct ccs_lock_struct {
++ int counter_idx; /* Currently active index (0 or 1). */
++ int counter[2]; /* Current users. Protected by ccs_counter_lock. */
++};
++
++#endif
++
++/***** SECTION3: Prototype definition section *****/
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)
++int ccs_lock(void);
++#endif
++void ccs_del_acl(struct list_head *element);
++void ccs_del_condition(struct list_head *element);
++void ccs_notify_gc(struct ccs_io_buffer *head, const bool is_register);
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)
++void ccs_unlock(const int idx);
++#endif
++
++static bool ccs_domain_used_by_task(struct ccs_domain_info *domain);
++static bool ccs_name_used_by_io_buffer(const char *string, const size_t size);
++static bool ccs_struct_used_by_io_buffer(const struct list_head *element);
++static int ccs_gc_thread(void *unused);
++static void ccs_collect_acl(struct list_head *list);
++static void ccs_collect_entry(void);
++static void ccs_collect_member(const enum ccs_policy_id id,
++ struct list_head *member_list);
++static void ccs_memory_free(const void *ptr, const enum ccs_policy_id type);
++static void ccs_put_name_union(struct ccs_name_union *ptr);
++static void ccs_put_number_union(struct ccs_number_union *ptr);
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)
++static void ccs_synchronize_counter(void);
++#endif
++static void ccs_try_to_gc(const enum ccs_policy_id type,
++ struct list_head *element);
++
++/***** SECTION4: Standalone functions section *****/
++
++/***** SECTION5: Variables definition section *****/
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19)
++
++/*
++ * Lock for syscall users.
++ *
++ * This lock is held for only protecting single SRCU section.
++ */
++struct srcu_struct ccs_ss;
++
++#else
++
++static struct ccs_lock_struct ccs_counter;
++/* Lock for protecting ccs_counter. */
++static DEFINE_SPINLOCK(ccs_counter_lock);
++
++#endif
++
++/***** SECTION6: Dependent functions section *****/
++
++/**
++ * ccs_memory_free - Free memory for elements.
++ *
++ * @ptr: Pointer to allocated memory.
++ * @type: One of values in "enum ccs_policy_id".
++ *
++ * Returns nothing.
++ *
++ * Caller holds ccs_policy_lock mutex.
++ */
++static void ccs_memory_free(const void *ptr, const enum ccs_policy_id type)
++{
++ /* Size of an element. */
++ static const u8 e[CCS_MAX_POLICY] = {
++#ifdef CONFIG_CCSECURITY_PORTRESERVE
++ [CCS_ID_RESERVEDPORT] = sizeof(struct ccs_reserved),
++#endif
++ [CCS_ID_GROUP] = sizeof(struct ccs_group),
++#ifdef CONFIG_CCSECURITY_NETWORK
++ [CCS_ID_ADDRESS_GROUP] = sizeof(struct ccs_address_group),
++#endif
++ [CCS_ID_PATH_GROUP] = sizeof(struct ccs_path_group),
++ [CCS_ID_NUMBER_GROUP] = sizeof(struct ccs_number_group),
++ [CCS_ID_AGGREGATOR] = sizeof(struct ccs_aggregator),
++ [CCS_ID_TRANSITION_CONTROL]
++ = sizeof(struct ccs_transition_control),
++ [CCS_ID_MANAGER] = sizeof(struct ccs_manager),
++ /* [CCS_ID_CONDITION] = "struct ccs_condition"->size, */
++ /* [CCS_ID_NAME] = "struct ccs_name"->size, */
++ /* [CCS_ID_ACL] = a["struct ccs_acl_info"->type], */
++ [CCS_ID_DOMAIN] = sizeof(struct ccs_domain_info),
++ };
++ /* Size of a domain ACL element. */
++ static const u8 a[] = {
++ [CCS_TYPE_PATH_ACL] = sizeof(struct ccs_path_acl),
++ [CCS_TYPE_PATH2_ACL] = sizeof(struct ccs_path2_acl),
++ [CCS_TYPE_PATH_NUMBER_ACL]
++ = sizeof(struct ccs_path_number_acl),
++ [CCS_TYPE_MKDEV_ACL] = sizeof(struct ccs_mkdev_acl),
++ [CCS_TYPE_MOUNT_ACL] = sizeof(struct ccs_mount_acl),
++#ifdef CONFIG_CCSECURITY_NETWORK
++ [CCS_TYPE_INET_ACL] = sizeof(struct ccs_inet_acl),
++ [CCS_TYPE_UNIX_ACL] = sizeof(struct ccs_unix_acl),
++#endif
++#ifdef CONFIG_CCSECURITY_MISC
++ [CCS_TYPE_ENV_ACL] = sizeof(struct ccs_env_acl),
++#endif
++#ifdef CONFIG_CCSECURITY_CAPABILITY
++ [CCS_TYPE_CAPABILITY_ACL] = sizeof(struct ccs_capability_acl),
++#endif
++#ifdef CONFIG_CCSECURITY_IPC
++ [CCS_TYPE_SIGNAL_ACL] = sizeof(struct ccs_signal_acl),
++#endif
++#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
++ [CCS_TYPE_AUTO_EXECUTE_HANDLER]
++ = sizeof(struct ccs_handler_acl),
++ [CCS_TYPE_DENIED_EXECUTE_HANDLER]
++ = sizeof(struct ccs_handler_acl),
++#endif
++#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
++ [CCS_TYPE_AUTO_TASK_ACL] = sizeof(struct ccs_task_acl),
++ [CCS_TYPE_MANUAL_TASK_ACL] = sizeof(struct ccs_task_acl),
++#endif
++ };
++ size_t size;
++ if (type == CCS_ID_ACL)
++ size = a[container_of(ptr, typeof(struct ccs_acl_info),
++ list)->type];
++ else if (type == CCS_ID_NAME)
++ size = container_of(ptr, typeof(struct ccs_name),
++ head.list)->size;
++ else if (type == CCS_ID_CONDITION)
++ size = container_of(ptr, typeof(struct ccs_condition),
++ head.list)->size;
++ else
++ size = e[type];
++ ccs_memory_used[CCS_MEMORY_POLICY] -= ccs_round2(size);
++ kfree(ptr);
++}
++
++/**
++ * ccs_put_name_union - Drop reference on "struct ccs_name_union".
++ *
++ * @ptr: Pointer to "struct ccs_name_union".
++ *
++ * Returns nothing.
++ */
++static void ccs_put_name_union(struct ccs_name_union *ptr)
++{
++ ccs_put_group(ptr->group);
++ ccs_put_name(ptr->filename);
++}
++
++/**
++ * ccs_put_number_union - Drop reference on "struct ccs_number_union".
++ *
++ * @ptr: Pointer to "struct ccs_number_union".
++ *
++ * Returns nothing.
++ */
++static void ccs_put_number_union(struct ccs_number_union *ptr)
++{
++ ccs_put_group(ptr->group);
++}
++
++/**
++ * ccs_struct_used_by_io_buffer - Check whether the list element is used by /proc/ccs/ users or not.
++ *
++ * @element: Pointer to "struct list_head".
++ *
++ * Returns true if @element is used by /proc/ccs/ users, false otherwise.
++ */
++static bool ccs_struct_used_by_io_buffer(const struct list_head *element)
++{
++ struct ccs_io_buffer *head;
++ bool in_use = false;
++ spin_lock(&ccs_io_buffer_list_lock);
++ list_for_each_entry(head, &ccs_io_buffer_list, list) {
++ head->users++;
++ spin_unlock(&ccs_io_buffer_list_lock);
++ mutex_lock(&head->io_sem);
++ if (head->r.domain == element || head->r.group == element ||
++ head->r.acl == element || &head->w.domain->list == element)
++ in_use = true;
++ mutex_unlock(&head->io_sem);
++ spin_lock(&ccs_io_buffer_list_lock);
++ head->users--;
++ if (in_use)
++ break;
++ }
++ spin_unlock(&ccs_io_buffer_list_lock);
++ return in_use;
++}
++
++/**
++ * ccs_name_used_by_io_buffer - Check whether the string is used by /proc/ccs/ users or not.
++ *
++ * @string: String to check.
++ * @size: Memory allocated for @string .
++ *
++ * Returns true if @string is used by /proc/ccs/ users, false otherwise.
++ */
++static bool ccs_name_used_by_io_buffer(const char *string, const size_t size)
++{
++ struct ccs_io_buffer *head;
++ bool in_use = false;
++ spin_lock(&ccs_io_buffer_list_lock);
++ list_for_each_entry(head, &ccs_io_buffer_list, list) {
++ int i;
++ head->users++;
++ spin_unlock(&ccs_io_buffer_list_lock);
++ mutex_lock(&head->io_sem);
++ for (i = 0; i < CCS_MAX_IO_READ_QUEUE; i++) {
++ const char *w = head->r.w[i];
++ if (w < string || w > string + size)
++ continue;
++ in_use = true;
++ break;
++ }
++ mutex_unlock(&head->io_sem);
++ spin_lock(&ccs_io_buffer_list_lock);
++ head->users--;
++ if (in_use)
++ break;
++ }
++ spin_unlock(&ccs_io_buffer_list_lock);
++ return in_use;
++}
++
++/**
++ * ccs_del_transition_control - Delete members in "struct ccs_transition_control".
++ *
++ * @element: Pointer to "struct list_head".
++ *
++ * Returns nothing.
++ */
++static inline void ccs_del_transition_control(struct list_head *element)
++{
++ struct ccs_transition_control *ptr =
++ container_of(element, typeof(*ptr), head.list);
++ ccs_put_name(ptr->domainname);
++ ccs_put_name(ptr->program);
++}
++
++/**
++ * ccs_del_aggregator - Delete members in "struct ccs_aggregator".
++ *
++ * @element: Pointer to "struct list_head".
++ *
++ * Returns nothing.
++ */
++static inline void ccs_del_aggregator(struct list_head *element)
++{
++ struct ccs_aggregator *ptr =
++ container_of(element, typeof(*ptr), head.list);
++ ccs_put_name(ptr->original_name);
++ ccs_put_name(ptr->aggregated_name);
++}
++
++/**
++ * ccs_del_manager - Delete members in "struct ccs_manager".
++ *
++ * @element: Pointer to "struct list_head".
++ *
++ * Returns nothing.
++ */
++static inline void ccs_del_manager(struct list_head *element)
++{
++ struct ccs_manager *ptr =
++ container_of(element, typeof(*ptr), head.list);
++ ccs_put_name(ptr->manager);
++}
++
++/**
++ * ccs_domain_used_by_task - Check whether the given pointer is referenced by a task.
++ *
++ * @domain: Pointer to "struct ccs_domain_info".
++ *
++ * Returns true if @domain is in use, false otherwise.
++ */
++static bool ccs_domain_used_by_task(struct ccs_domain_info *domain)
++{
++ bool in_use = false;
++ /*
++ * Don't delete this domain if somebody is doing execve().
++ *
++ * Since ccs_finish_execve() first reverts ccs_domain_info and then
++ * updates ccs_flags, we need smp_rmb() to make sure that GC first
++ * checks ccs_flags and then checks ccs_domain_info.
++ */
++#ifdef CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY
++ int idx;
++ rcu_read_lock();
++ for (idx = 0; idx < CCS_MAX_TASK_SECURITY_HASH; idx++) {
++ struct ccs_security *ptr;
++ struct list_head *list = &ccs_task_security_list[idx];
++ list_for_each_entry_rcu(ptr, list, list) {
++ if (!(ptr->ccs_flags & CCS_TASK_IS_IN_EXECVE)) {
++ smp_rmb(); /* Avoid out of order execution. */
++ if (ptr->ccs_domain_info != domain)
++ continue;
++ }
++ in_use = true;
++ goto out;
++ }
++ }
++out:
++ rcu_read_unlock();
++#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0)
++ struct task_struct *g;
++ struct task_struct *t;
++ ccs_tasklist_lock();
++ do_each_thread(g, t) {
++ if (!(t->ccs_flags & CCS_TASK_IS_IN_EXECVE)) {
++ smp_rmb(); /* Avoid out of order execution. */
++ if (t->ccs_domain_info != domain)
++ continue;
++ }
++ in_use = true;
++ goto out;
++ } while_each_thread(g, t);
++out:
++ ccs_tasklist_unlock();
++#else
++ struct task_struct *p;
++ ccs_tasklist_lock();
++ for_each_process(p) {
++ if (!(p->ccs_flags & CCS_TASK_IS_IN_EXECVE)) {
++ smp_rmb(); /* Avoid out of order execution. */
++ if (p->ccs_domain_info != domain)
++ continue;
++ }
++ in_use = true;
++ break;
++ }
++ ccs_tasklist_unlock();
++#endif
++ return in_use;
++}
++
++/**
++ * ccs_del_acl - Delete members in "struct ccs_acl_info".
++ *
++ * @element: Pointer to "struct list_head".
++ *
++ * Returns nothing.
++ */
++void ccs_del_acl(struct list_head *element)
++{
++ struct ccs_acl_info *acl = container_of(element, typeof(*acl), list);
++ ccs_put_condition(acl->cond);
++ switch (acl->type) {
++ case CCS_TYPE_PATH_ACL:
++ {
++ struct ccs_path_acl *entry =
++ container_of(acl, typeof(*entry), head);
++ ccs_put_name_union(&entry->name);
++ }
++ break;
++ case CCS_TYPE_PATH2_ACL:
++ {
++ struct ccs_path2_acl *entry =
++ container_of(acl, typeof(*entry), head);
++ ccs_put_name_union(&entry->name1);
++ ccs_put_name_union(&entry->name2);
++ }
++ break;
++ case CCS_TYPE_PATH_NUMBER_ACL:
++ {
++ struct ccs_path_number_acl *entry =
++ container_of(acl, typeof(*entry), head);
++ ccs_put_name_union(&entry->name);
++ ccs_put_number_union(&entry->number);
++ }
++ break;
++ case CCS_TYPE_MKDEV_ACL:
++ {
++ struct ccs_mkdev_acl *entry =
++ container_of(acl, typeof(*entry), head);
++ ccs_put_name_union(&entry->name);
++ ccs_put_number_union(&entry->mode);
++ ccs_put_number_union(&entry->major);
++ ccs_put_number_union(&entry->minor);
++ }
++ break;
++ case CCS_TYPE_MOUNT_ACL:
++ {
++ struct ccs_mount_acl *entry =
++ container_of(acl, typeof(*entry), head);
++ ccs_put_name_union(&entry->dev_name);
++ ccs_put_name_union(&entry->dir_name);
++ ccs_put_name_union(&entry->fs_type);
++ ccs_put_number_union(&entry->flags);
++ }
++ break;
++#ifdef CONFIG_CCSECURITY_NETWORK
++ case CCS_TYPE_INET_ACL:
++ {
++ struct ccs_inet_acl *entry =
++ container_of(acl, typeof(*entry), head);
++ ccs_put_group(entry->address.group);
++ ccs_put_number_union(&entry->port);
++ }
++ break;
++ case CCS_TYPE_UNIX_ACL:
++ {
++ struct ccs_unix_acl *entry =
++ container_of(acl, typeof(*entry), head);
++ ccs_put_name_union(&entry->name);
++ }
++ break;
++#endif
++#ifdef CONFIG_CCSECURITY_MISC
++ case CCS_TYPE_ENV_ACL:
++ {
++ struct ccs_env_acl *entry =
++ container_of(acl, typeof(*entry), head);
++ ccs_put_name(entry->env);
++ }
++ break;
++#endif
++#ifdef CONFIG_CCSECURITY_CAPABILITY
++ case CCS_TYPE_CAPABILITY_ACL:
++ {
++ /* Nothing to do. */
++ }
++ break;
++#endif
++#ifdef CONFIG_CCSECURITY_IPC
++ case CCS_TYPE_SIGNAL_ACL:
++ {
++ struct ccs_signal_acl *entry =
++ container_of(acl, typeof(*entry), head);
++ ccs_put_number_union(&entry->sig);
++ ccs_put_name(entry->domainname);
++ }
++ break;
++#endif
++#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
++ case CCS_TYPE_AUTO_EXECUTE_HANDLER:
++ case CCS_TYPE_DENIED_EXECUTE_HANDLER:
++ {
++ struct ccs_handler_acl *entry =
++ container_of(acl, typeof(*entry), head);
++ ccs_put_name(entry->handler);
++ }
++ break;
++#endif
++#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
++ case CCS_TYPE_AUTO_TASK_ACL:
++ case CCS_TYPE_MANUAL_TASK_ACL:
++ {
++ struct ccs_task_acl *entry =
++ container_of(acl, typeof(*entry), head);
++ ccs_put_name(entry->domainname);
++ }
++ break;
++#endif
++ }
++}
++
++/**
++ * ccs_del_domain - Delete members in "struct ccs_domain_info".
++ *
++ * @element: Pointer to "struct list_head".
++ *
++ * Returns nothing.
++ *
++ * Caller holds ccs_policy_lock mutex.
++ */
++static inline void ccs_del_domain(struct list_head *element)
++{
++ struct ccs_domain_info *domain =
++ container_of(element, typeof(*domain), list);
++ struct ccs_acl_info *acl;
++ struct ccs_acl_info *tmp;
++ /*
++ * Since this domain is referenced from neither "struct ccs_io_buffer"
++ * nor "struct task_struct", we can delete elements without checking
++ * for is_deleted flag.
++ */
++ list_for_each_entry_safe(acl, tmp, &domain->acl_info_list, list) {
++ ccs_del_acl(&acl->list);
++ ccs_memory_free(acl, CCS_ID_ACL);
++ }
++ ccs_put_name(domain->domainname);
++}
++
++/**
++ * ccs_del_path_group - Delete members in "struct ccs_path_group".
++ *
++ * @element: Pointer to "struct list_head".
++ *
++ * Returns nothing.
++ */
++static inline void ccs_del_path_group(struct list_head *element)
++{
++ struct ccs_path_group *member =
++ container_of(element, typeof(*member), head.list);
++ ccs_put_name(member->member_name);
++}
++
++/**
++ * ccs_del_group - Delete "struct ccs_group".
++ *
++ * @element: Pointer to "struct list_head".
++ *
++ * Returns nothing.
++ */
++static inline void ccs_del_group(struct list_head *element)
++{
++ struct ccs_group *group =
++ container_of(element, typeof(*group), head.list);
++ ccs_put_name(group->group_name);
++}
++
++/**
++ * ccs_del_address_group - Delete members in "struct ccs_address_group".
++ *
++ * @element: Pointer to "struct list_head".
++ *
++ * Returns nothing.
++ */
++static inline void ccs_del_address_group(struct list_head *element)
++{
++ /* Nothing to do. */
++}
++
++/**
++ * ccs_del_number_group - Delete members in "struct ccs_number_group".
++ *
++ * @element: Pointer to "struct list_head".
++ *
++ * Returns nothing.
++ */
++static inline void ccs_del_number_group(struct list_head *element)
++{
++ /* Nothing to do. */
++}
++
++/**
++ * ccs_del_reservedport - Delete members in "struct ccs_reserved".
++ *
++ * @element: Pointer to "struct list_head".
++ *
++ * Returns nothing.
++ */
++static inline void ccs_del_reservedport(struct list_head *element)
++{
++ /* Nothing to do. */
++}
++
++/**
++ * ccs_del_condition - Delete members in "struct ccs_condition".
++ *
++ * @element: Pointer to "struct list_head".
++ *
++ * Returns nothing.
++ */
++void ccs_del_condition(struct list_head *element)
++{
++ struct ccs_condition *cond = container_of(element, typeof(*cond),
++ head.list);
++ const u16 condc = cond->condc;
++ const u16 numbers_count = cond->numbers_count;
++ const u16 names_count = cond->names_count;
++ const u16 argc = cond->argc;
++ const u16 envc = cond->envc;
++ unsigned int i;
++ const struct ccs_condition_element *condp
++ = (const struct ccs_condition_element *) (cond + 1);
++ struct ccs_number_union *numbers_p
++ = (struct ccs_number_union *) (condp + condc);
++ struct ccs_name_union *names_p
++ = (struct ccs_name_union *) (numbers_p + numbers_count);
++ const struct ccs_argv *argv
++ = (const struct ccs_argv *) (names_p + names_count);
++ const struct ccs_envp *envp
++ = (const struct ccs_envp *) (argv + argc);
++ for (i = 0; i < numbers_count; i++)
++ ccs_put_number_union(numbers_p++);
++ for (i = 0; i < names_count; i++)
++ ccs_put_name_union(names_p++);
++ for (i = 0; i < argc; argv++, i++)
++ ccs_put_name(argv->value);
++ for (i = 0; i < envc; envp++, i++) {
++ ccs_put_name(envp->name);
++ ccs_put_name(envp->value);
++ }
++ ccs_put_name(cond->transit);
++}
++
++/**
++ * ccs_del_name - Delete members in "struct ccs_name".
++ *
++ * @element: Pointer to "struct list_head".
++ *
++ * Returns nothing.
++ */
++static inline void ccs_del_name(struct list_head *element)
++{
++ /* Nothing to do. */
++}
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)
++
++/**
++ * ccs_lock - Alternative for srcu_read_lock().
++ *
++ * Returns index number which has to be passed to ccs_unlock().
++ */
++int ccs_lock(void)
++{
++ int idx;
++ spin_lock(&ccs_counter_lock);
++ idx = ccs_counter.counter_idx;
++ ccs_counter.counter[idx]++;
++ spin_unlock(&ccs_counter_lock);
++ return idx;
++}
++
++/**
++ * ccs_unlock - Alternative for srcu_read_unlock().
++ *
++ * @idx: Index number returned by ccs_lock().
++ *
++ * Returns nothing.
++ */
++void ccs_unlock(const int idx)
++{
++ spin_lock(&ccs_counter_lock);
++ ccs_counter.counter[idx]--;
++ spin_unlock(&ccs_counter_lock);
++}
++
++/**
++ * ccs_synchronize_counter - Alternative for synchronize_srcu().
++ *
++ * Returns nothing.
++ */
++static void ccs_synchronize_counter(void)
++{
++ int idx;
++ int v;
++ /*
++ * Change currently active counter's index. Make it visible to other
++ * threads by doing it with ccs_counter_lock held.
++ * This function is called by garbage collector thread, and the garbage
++ * collector thread is exclusive. Therefore, it is guaranteed that
++ * SRCU grace period has expired when returning from this function.
++ */
++ spin_lock(&ccs_counter_lock);
++ idx = ccs_counter.counter_idx;
++ ccs_counter.counter_idx ^= 1;
++ v = ccs_counter.counter[idx];
++ spin_unlock(&ccs_counter_lock);
++ /* Wait for previously active counter to become 0. */
++ while (v) {
++ ssleep(1);
++ spin_lock(&ccs_counter_lock);
++ v = ccs_counter.counter[idx];
++ spin_unlock(&ccs_counter_lock);
++ }
++}
++
++#endif
++
++/**
++ * ccs_try_to_gc - Try to kfree() an entry.
++ *
++ * @type: One of values in "enum ccs_policy_id".
++ * @element: Pointer to "struct list_head".
++ *
++ * Returns nothing.
++ *
++ * Caller holds ccs_policy_lock mutex.
++ */
++static void ccs_try_to_gc(const enum ccs_policy_id type,
++ struct list_head *element)
++{
++ /*
++ * __list_del_entry() guarantees that the list element became no longer
++ * reachable from the list which the element was originally on (e.g.
++ * ccs_domain_list). Also, synchronize_srcu() guarantees that the list
++ * element became no longer referenced by syscall users.
++ */
++ __list_del_entry(element);
++ mutex_unlock(&ccs_policy_lock);
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19)
++ synchronize_srcu(&ccs_ss);
++#else
++ ccs_synchronize_counter();
++#endif
++ /*
++ * However, there are two users which may still be using the list
++ * element. We need to defer until both users forget this element.
++ *
++ * Don't kfree() until "struct ccs_io_buffer"->r.{domain,group,acl} and
++ * "struct ccs_io_buffer"->w.domain forget this element.
++ */
++ if (ccs_struct_used_by_io_buffer(element))
++ goto reinject;
++ switch (type) {
++ case CCS_ID_TRANSITION_CONTROL:
++ ccs_del_transition_control(element);
++ break;
++ case CCS_ID_MANAGER:
++ ccs_del_manager(element);
++ break;
++ case CCS_ID_AGGREGATOR:
++ ccs_del_aggregator(element);
++ break;
++ case CCS_ID_GROUP:
++ ccs_del_group(element);
++ break;
++ case CCS_ID_PATH_GROUP:
++ ccs_del_path_group(element);
++ break;
++#ifdef CONFIG_CCSECURITY_NETWORK
++ case CCS_ID_ADDRESS_GROUP:
++ ccs_del_address_group(element);
++ break;
++#endif
++ case CCS_ID_NUMBER_GROUP:
++ ccs_del_number_group(element);
++ break;
++#ifdef CONFIG_CCSECURITY_PORTRESERVE
++ case CCS_ID_RESERVEDPORT:
++ ccs_del_reservedport(element);
++ break;
++#endif
++ case CCS_ID_CONDITION:
++ ccs_del_condition(element);
++ break;
++ case CCS_ID_NAME:
++ /*
++ * Don't kfree() until all "struct ccs_io_buffer"->r.w[] forget
++ * this element.
++ */
++ if (ccs_name_used_by_io_buffer
++ (container_of(element, typeof(struct ccs_name),
++ head.list)->entry.name,
++ container_of(element, typeof(struct ccs_name),
++ head.list)->size))
++ goto reinject;
++ ccs_del_name(element);
++ break;
++ case CCS_ID_ACL:
++ ccs_del_acl(element);
++ break;
++ case CCS_ID_DOMAIN:
++ /*
++ * Don't kfree() until all "struct task_struct" forget this
++ * element.
++ */
++ if (ccs_domain_used_by_task
++ (container_of(element, typeof(struct ccs_domain_info),
++ list)))
++ goto reinject;
++ break;
++ case CCS_MAX_POLICY:
++ break;
++ }
++ mutex_lock(&ccs_policy_lock);
++ if (type == CCS_ID_DOMAIN)
++ ccs_del_domain(element);
++ ccs_memory_free(element, type);
++ return;
++reinject:
++ /*
++ * We can safely reinject this element here bacause
++ * (1) Appending list elements and removing list elements are protected
++ * by ccs_policy_lock mutex.
++ * (2) Only this function removes list elements and this function is
++ * exclusively executed by ccs_gc_mutex mutex.
++ * are true.
++ */
++ mutex_lock(&ccs_policy_lock);
++ list_add_rcu(element, element->prev);
++}
++
++/**
++ * ccs_collect_member - Delete elements with "struct ccs_acl_head".
++ *
++ * @id: One of values in "enum ccs_policy_id".
++ * @member_list: Pointer to "struct list_head".
++ *
++ * Returns nothing.
++ *
++ * Caller holds ccs_policy_lock mutex.
++ */
++static void ccs_collect_member(const enum ccs_policy_id id,
++ struct list_head *member_list)
++{
++ struct ccs_acl_head *member;
++ struct ccs_acl_head *tmp;
++ list_for_each_entry_safe(member, tmp, member_list, list) {
++ if (!member->is_deleted)
++ continue;
++ member->is_deleted = CCS_GC_IN_PROGRESS;
++ ccs_try_to_gc(id, &member->list);
++ }
++}
++
++/**
++ * ccs_collect_acl - Delete elements in "struct ccs_domain_info".
++ *
++ * @list: Pointer to "struct list_head".
++ *
++ * Returns nothing.
++ *
++ * Caller holds ccs_policy_lock mutex.
++ */
++static void ccs_collect_acl(struct list_head *list)
++{
++ struct ccs_acl_info *acl;
++ struct ccs_acl_info *tmp;
++ list_for_each_entry_safe(acl, tmp, list, list) {
++ if (!acl->is_deleted)
++ continue;
++ acl->is_deleted = CCS_GC_IN_PROGRESS;
++ ccs_try_to_gc(CCS_ID_ACL, &acl->list);
++ }
++}
++
++/**
++ * ccs_collect_entry - Try to kfree() deleted elements.
++ *
++ * Returns nothing.
++ */
++static void ccs_collect_entry(void)
++{
++ int i;
++ enum ccs_policy_id id;
++ struct ccs_policy_namespace *ns;
++ mutex_lock(&ccs_policy_lock);
++ {
++ struct ccs_domain_info *domain;
++ struct ccs_domain_info *tmp;
++ list_for_each_entry_safe(domain, tmp, &ccs_domain_list, list) {
++ ccs_collect_acl(&domain->acl_info_list);
++ if (!domain->is_deleted ||
++ ccs_domain_used_by_task(domain))
++ continue;
++ ccs_try_to_gc(CCS_ID_DOMAIN, &domain->list);
++ }
++ }
++ list_for_each_entry(ns, &ccs_namespace_list, namespace_list) {
++ for (id = 0; id < CCS_MAX_POLICY; id++)
++ ccs_collect_member(id, &ns->policy_list[id]);
++ for (i = 0; i < CCS_MAX_ACL_GROUPS; i++)
++ ccs_collect_acl(&ns->acl_group[i]);
++ }
++ {
++ struct ccs_shared_acl_head *ptr;
++ struct ccs_shared_acl_head *tmp;
++ list_for_each_entry_safe(ptr, tmp, &ccs_condition_list, list) {
++ if (atomic_read(&ptr->users) > 0)
++ continue;
++ atomic_set(&ptr->users, CCS_GC_IN_PROGRESS);
++ ccs_try_to_gc(CCS_ID_CONDITION, &ptr->list);
++ }
++ }
++ list_for_each_entry(ns, &ccs_namespace_list, namespace_list) {
++ for (i = 0; i < CCS_MAX_GROUP; i++) {
++ struct list_head *list = &ns->group_list[i];
++ struct ccs_group *group;
++ struct ccs_group *tmp;
++ switch (i) {
++ case 0:
++ id = CCS_ID_PATH_GROUP;
++ break;
++ case 1:
++ id = CCS_ID_NUMBER_GROUP;
++ break;
++ default:
++#ifdef CONFIG_CCSECURITY_NETWORK
++ id = CCS_ID_ADDRESS_GROUP;
++#else
++ continue;
++#endif
++ break;
++ }
++ list_for_each_entry_safe(group, tmp, list, head.list) {
++ ccs_collect_member(id, &group->member_list);
++ if (!list_empty(&group->member_list) ||
++ atomic_read(&group->head.users) > 0)
++ continue;
++ atomic_set(&group->head.users,
++ CCS_GC_IN_PROGRESS);
++ ccs_try_to_gc(CCS_ID_GROUP, &group->head.list);
++ }
++ }
++ }
++ for (i = 0; i < CCS_MAX_HASH; i++) {
++ struct list_head *list = &ccs_name_list[i];
++ struct ccs_shared_acl_head *ptr;
++ struct ccs_shared_acl_head *tmp;
++ list_for_each_entry_safe(ptr, tmp, list, list) {
++ if (atomic_read(&ptr->users) > 0)
++ continue;
++ atomic_set(&ptr->users, CCS_GC_IN_PROGRESS);
++ ccs_try_to_gc(CCS_ID_NAME, &ptr->list);
++ }
++ }
++ mutex_unlock(&ccs_policy_lock);
++}
++
++/**
++ * ccs_gc_thread - Garbage collector thread function.
++ *
++ * @unused: Unused.
++ *
++ * Returns 0.
++ */
++static int ccs_gc_thread(void *unused)
++{
++ /* Garbage collector thread is exclusive. */
++ static DEFINE_MUTEX(ccs_gc_mutex);
++ if (!mutex_trylock(&ccs_gc_mutex))
++ goto out;
++#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 6)
++ /* daemonize() not needed. */
++#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0)
++ daemonize("GC for CCS");
++#else
++ daemonize();
++ reparent_to_init();
++#if defined(TASK_DEAD)
++ {
++ struct task_struct *task = current;
++ spin_lock_irq(&task->sighand->siglock);
++ siginitsetinv(&task->blocked, 0);
++ recalc_sigpending();
++ spin_unlock_irq(&task->sighand->siglock);
++ }
++#else
++ {
++ struct task_struct *task = current;
++ spin_lock_irq(&task->sigmask_lock);
++ siginitsetinv(&task->blocked, 0);
++ recalc_sigpending(task);
++ spin_unlock_irq(&task->sigmask_lock);
++ }
++#endif
++ snprintf(current->comm, sizeof(current->comm) - 1, "GC for CCS");
++#endif
++ ccs_collect_entry();
++ {
++ struct ccs_io_buffer *head;
++ struct ccs_io_buffer *tmp;
++ spin_lock(&ccs_io_buffer_list_lock);
++ list_for_each_entry_safe(head, tmp, &ccs_io_buffer_list,
++ list) {
++ if (head->users)
++ continue;
++ list_del(&head->list);
++ kfree(head->read_buf);
++ kfree(head->write_buf);
++ kfree(head);
++ }
++ spin_unlock(&ccs_io_buffer_list_lock);
++ }
++ mutex_unlock(&ccs_gc_mutex);
++out:
++ /* This acts as do_exit(0). */
++ return 0;
++}
++
++/**
++ * ccs_notify_gc - Register/unregister /proc/ccs/ users.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ * @is_register: True if register, false if unregister.
++ *
++ * Returns nothing.
++ */
++void ccs_notify_gc(struct ccs_io_buffer *head, const bool is_register)
++{
++ bool is_write = false;
++ spin_lock(&ccs_io_buffer_list_lock);
++ if (is_register) {
++ head->users = 1;
++ list_add(&head->list, &ccs_io_buffer_list);
++ } else {
++ is_write = head->write_buf != NULL;
++ if (!--head->users) {
++ list_del(&head->list);
++ kfree(head->read_buf);
++ kfree(head->write_buf);
++ kfree(head);
++ }
++ }
++ spin_unlock(&ccs_io_buffer_list_lock);
++ if (is_write) {
++#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 6)
++ struct task_struct *task = kthread_create(ccs_gc_thread, NULL,
++ "GC for CCS");
++ if (!IS_ERR(task))
++ wake_up_process(task);
++#else
++ kernel_thread(ccs_gc_thread, NULL, 0);
++#endif
++ }
++}
+diff --git a/security/ccsecurity/internal.h b/security/ccsecurity/internal.h
+new file mode 100644
+index 0000000..3f703f2
+--- /dev/null
++++ b/security/ccsecurity/internal.h
+@@ -0,0 +1,2090 @@
++/*
++ * security/ccsecurity/internal.h
++ *
++ * Copyright (C) 2005-2012 NTT DATA CORPORATION
++ *
++ * Version: 1.8.4 2015/05/05
++ */
++
++#ifndef _SECURITY_CCSECURITY_INTERNAL_H
++#define _SECURITY_CCSECURITY_INTERNAL_H
++
++#include <linux/version.h>
++#include <linux/types.h>
++#include <linux/kernel.h>
++#include <linux/string.h>
++#include <linux/mm.h>
++#include <linux/utime.h>
++#include <linux/file.h>
++#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 38)
++#include <linux/smp_lock.h>
++#endif
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/slab.h>
++#include <linux/highmem.h>
++#include <linux/poll.h>
++#include <linux/binfmts.h>
++#include <linux/delay.h>
++#include <linux/sched.h>
++#include <linux/dcache.h>
++#include <linux/mount.h>
++#include <linux/net.h>
++#include <linux/inet.h>
++#include <linux/in.h>
++#include <linux/in6.h>
++#include <linux/un.h>
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
++#include <linux/fs.h>
++#endif
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0)
++#include <linux/namei.h>
++#endif
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 30)
++#include <linux/fs_struct.h>
++#endif
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
++#include <linux/namespace.h>
++#endif
++#include <linux/proc_fs.h>
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) || defined(RHEL_MAJOR)
++#include <linux/hash.h>
++#endif
++#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 18) || (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33) && defined(CONFIG_SYSCTL_SYSCALL))
++#include <linux/sysctl.h>
++#endif
++#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 6)
++#include <linux/kthread.h>
++#endif
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 10, 0)
++#include <linux/magic.h>
++#endif
++#include <stdarg.h>
++#include <asm/uaccess.h>
++#include <net/sock.h>
++#include <net/af_unix.h>
++#include <net/ip.h>
++#include <net/ipv6.h>
++#include <net/udp.h>
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
++#define sk_family family
++#define sk_protocol protocol
++#define sk_type type
++#endif
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
++
++/* Structure for holding "struct vfsmount *" and "struct dentry *". */
++struct path {
++ struct vfsmount *mnt;
++ struct dentry *dentry;
++};
++
++#endif
++
++#ifndef __printf
++#define __printf(a,b) __attribute__((format(printf,a,b)))
++#endif
++#ifndef __packed
++#define __packed __attribute__((__packed__))
++#endif
++#ifndef bool
++#define bool _Bool
++#endif
++#ifndef false
++#define false 0
++#endif
++#ifndef true
++#define true 1
++#endif
++
++#ifndef __user
++#define __user
++#endif
++
++#ifndef current_uid
++#define current_uid() (current->uid)
++#endif
++#ifndef current_gid
++#define current_gid() (current->gid)
++#endif
++#ifndef current_euid
++#define current_euid() (current->euid)
++#endif
++#ifndef current_egid
++#define current_egid() (current->egid)
++#endif
++#ifndef current_suid
++#define current_suid() (current->suid)
++#endif
++#ifndef current_sgid
++#define current_sgid() (current->sgid)
++#endif
++#ifndef current_fsuid
++#define current_fsuid() (current->fsuid)
++#endif
++#ifndef current_fsgid
++#define current_fsgid() (current->fsgid)
++#endif
++
++#ifndef DEFINE_SPINLOCK
++#define DEFINE_SPINLOCK(x) spinlock_t x = SPIN_LOCK_UNLOCKED
++#endif
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 16)
++#define mutex semaphore
++#define mutex_init(mutex) init_MUTEX(mutex)
++#define mutex_unlock(mutex) up(mutex)
++#define mutex_lock(mutex) down(mutex)
++#define mutex_lock_interruptible(mutex) down_interruptible(mutex)
++#define mutex_trylock(mutex) (!down_trylock(mutex))
++#define DEFINE_MUTEX(mutexname) DECLARE_MUTEX(mutexname)
++#endif
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 15)
++#define MS_UNBINDABLE (1<<17) /* change to unbindable */
++#define MS_PRIVATE (1<<18) /* change to private */
++#define MS_SLAVE (1<<19) /* change to slave */
++#define MS_SHARED (1<<20) /* change to shared */
++#endif
++
++#ifndef container_of
++#define container_of(ptr, type, member) ({ \
++ const typeof(((type *)0)->member) *__mptr = (ptr); \
++ (type *)((char *)__mptr - offsetof(type, member)); })
++#endif
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0)
++#define smp_read_barrier_depends smp_rmb
++#endif
++
++#ifndef ACCESS_ONCE
++#define ACCESS_ONCE(x) (*(volatile typeof(x) *)&(x))
++#endif
++
++#ifndef rcu_dereference
++#define rcu_dereference(p) ({ \
++ typeof(p) _________p1 = ACCESS_ONCE(p); \
++ smp_read_barrier_depends(); /* see RCU */ \
++ (_________p1); \
++ })
++#endif
++
++#ifndef rcu_assign_pointer
++#define rcu_assign_pointer(p, v) \
++ ({ \
++ if (!__builtin_constant_p(v) || \
++ ((v) != NULL)) \
++ smp_wmb(); /* see RCU */ \
++ (p) = (v); \
++ })
++#endif
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 9, 0)
++#define f_vfsmnt f_path.mnt
++#endif
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 14)
++
++/**
++ * kzalloc() - Allocate memory. The memory is set to zero.
++ *
++ * @size: Size to allocate.
++ * @flags: GFP flags.
++ *
++ * Returns pointer to allocated memory on success, NULL otherwise.
++ *
++ * This is for compatibility with older kernels.
++ *
++ * Since several distributions backported kzalloc(), I define it as a macro
++ * rather than an inlined function in order to avoid multiple definition error.
++ */
++#define kzalloc(size, flags) ({ \
++ void *ret = kmalloc((size), (flags)); \
++ if (ret) \
++ memset(ret, 0, (size)); \
++ ret; })
++
++#endif
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25)
++
++/**
++ * path_put - Drop reference on "struct path".
++ *
++ * @path: Pointer to "struct path".
++ *
++ * Returns nothing.
++ *
++ * This is for compatibility with older kernels.
++ */
++static inline void path_put(struct path *path)
++{
++ dput(path->dentry);
++ mntput(path->mnt);
++}
++
++#endif
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
++
++/**
++ * __list_add_rcu - Insert a new entry between two known consecutive entries.
++ *
++ * @new: Pointer to "struct list_head".
++ * @prev: Pointer to "struct list_head".
++ * @next: Pointer to "struct list_head".
++ *
++ * Returns nothing.
++ *
++ * This is for compatibility with older kernels.
++ */
++static inline void __list_add_rcu(struct list_head *new,
++ struct list_head *prev,
++ struct list_head *next)
++{
++ new->next = next;
++ new->prev = prev;
++ rcu_assign_pointer(prev->next, new);
++ next->prev = new;
++}
++
++/**
++ * list_add_tail_rcu - Add a new entry to rcu-protected list.
++ *
++ * @new: Pointer to "struct list_head".
++ * @head: Pointer to "struct list_head".
++ *
++ * Returns nothing.
++ *
++ * This is for compatibility with older kernels.
++ */
++static inline void list_add_tail_rcu(struct list_head *new,
++ struct list_head *head)
++{
++ __list_add_rcu(new, head->prev, head);
++}
++
++/**
++ * list_add_rcu - Add a new entry to rcu-protected list.
++ *
++ * @new: Pointer to "struct list_head".
++ * @head: Pointer to "struct list_head".
++ *
++ * Returns nothing.
++ *
++ * This is for compatibility with older kernels.
++ */
++static inline void list_add_rcu(struct list_head *new, struct list_head *head)
++{
++ __list_add_rcu(new, head, head->next);
++}
++
++#endif
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 38)
++
++/**
++ * __list_del_entry - Deletes entry from list without re-initialization.
++ *
++ * @entry: Pointer to "struct list_head".
++ *
++ * Returns nothing.
++ *
++ * This is for compatibility with older kernels.
++ */
++static inline void __list_del_entry(struct list_head *entry)
++{
++ __list_del(entry->prev, entry->next);
++}
++
++#endif
++
++#ifndef list_for_each_entry_safe
++
++/**
++ * list_for_each_entry_safe - Iterate over list of given type safe against removal of list entry.
++ *
++ * @pos: The "type *" to use as a loop cursor.
++ * @n: Another "type *" to use as temporary storage.
++ * @head: Pointer to "struct list_head".
++ * @member: The name of the list_struct within the struct.
++ *
++ * This is for compatibility with older kernels.
++ */
++#define list_for_each_entry_safe(pos, n, head, member) \
++ for (pos = list_entry((head)->next, typeof(*pos), member), \
++ n = list_entry(pos->member.next, typeof(*pos), member); \
++ &pos->member != (head); \
++ pos = n, n = list_entry(n->member.next, typeof(*n), member))
++
++#endif
++
++#ifndef srcu_dereference
++
++/**
++ * srcu_dereference - Fetch SRCU-protected pointer with checking.
++ *
++ * @p: The pointer to read, prior to dereferencing.
++ * @ss: Pointer to "struct srcu_struct".
++ *
++ * Returns @p.
++ *
++ * This is for compatibility with older kernels.
++ */
++#define srcu_dereference(p, ss) rcu_dereference(p)
++
++#endif
++
++#ifndef list_for_each_entry_srcu
++
++/**
++ * list_for_each_entry_srcu - Iterate over rcu list of given type.
++ *
++ * @pos: The type * to use as a loop cursor.
++ * @head: The head for your list.
++ * @member: The name of the list_struct within the struct.
++ * @ss: Pointer to "struct srcu_struct".
++ *
++ * As of 2.6.36, this macro is not provided because only TOMOYO wants it.
++ */
++#define list_for_each_entry_srcu(pos, head, member, ss) \
++ for (pos = list_entry(srcu_dereference((head)->next, ss), \
++ typeof(*pos), member); \
++ prefetch(pos->member.next), &pos->member != (head); \
++ pos = list_entry(srcu_dereference(pos->member.next, ss), \
++ typeof(*pos), member))
++
++#endif
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 4, 30) || (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) && LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 9))
++
++#if LINUX_VERSION_CODE == KERNEL_VERSION(2, 4, 21)
++#undef ssleep
++#endif
++
++#ifndef ssleep
++
++/**
++ * ssleep - Sleep for specified seconds.
++ *
++ * @secs: Seconds to sleep.
++ *
++ * Returns nothing.
++ *
++ * This is for compatibility with older kernels.
++ *
++ * Since several distributions backported ssleep(), I define it as a macro
++ * rather than an inlined function in order to avoid multiple definition error.
++ */
++#define ssleep(secs) { \
++ set_current_state(TASK_UNINTERRUPTIBLE); \
++ schedule_timeout((HZ * secs) + 1); \
++ }
++
++#endif
++
++#endif
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 5, 0)
++
++/**
++ * from_kuid - Convert kuid_t to uid_t.
++ *
++ * @ns: Unused.
++ * @uid: kuid_t value.
++ *
++ * Returns uid seen from init's user namespace.
++ */
++#define from_kuid(ns, uid) (uid)
++
++/**
++ * from_kgid - Convert kgid_t to gid_t.
++ *
++ * @ns: Unused.
++ * @gid: kgid_t value.
++ *
++ * Returns gid seen from init's user namespace.
++ */
++#define from_kgid(ns, gid) (gid)
++
++/**
++ * uid_eq - Check whether the uids are equals or not.
++ *
++ * @left: Uid seen from current user namespace.
++ * @right: Uid seen from current user namespace.
++ *
++ * Returns true if uid is root in init's user namespace, false otherwise.
++ */
++#define uid_eq(left, right) ((left) == (right))
++#define GLOBAL_ROOT_UID 0
++
++#endif
++
++/*
++ * TOMOYO specific part start.
++ */
++
++#include <linux/ccsecurity.h>
++
++/* Enumeration definition for internal use. */
++
++/* Index numbers for Access Controls. */
++enum ccs_acl_entry_type_index {
++ CCS_TYPE_PATH_ACL,
++ CCS_TYPE_PATH2_ACL,
++ CCS_TYPE_PATH_NUMBER_ACL,
++ CCS_TYPE_MKDEV_ACL,
++ CCS_TYPE_MOUNT_ACL,
++#ifdef CONFIG_CCSECURITY_MISC
++ CCS_TYPE_ENV_ACL,
++#endif
++#ifdef CONFIG_CCSECURITY_CAPABILITY
++ CCS_TYPE_CAPABILITY_ACL,
++#endif
++#ifdef CONFIG_CCSECURITY_NETWORK
++ CCS_TYPE_INET_ACL,
++ CCS_TYPE_UNIX_ACL,
++#endif
++#ifdef CONFIG_CCSECURITY_IPC
++ CCS_TYPE_SIGNAL_ACL,
++#endif
++#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
++ CCS_TYPE_AUTO_EXECUTE_HANDLER,
++ CCS_TYPE_DENIED_EXECUTE_HANDLER,
++#endif
++#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
++ CCS_TYPE_AUTO_TASK_ACL,
++ CCS_TYPE_MANUAL_TASK_ACL,
++#endif
++};
++
++/* Index numbers for "struct ccs_condition". */
++enum ccs_conditions_index {
++ CCS_TASK_UID, /* current_uid() */
++ CCS_TASK_EUID, /* current_euid() */
++ CCS_TASK_SUID, /* current_suid() */
++ CCS_TASK_FSUID, /* current_fsuid() */
++ CCS_TASK_GID, /* current_gid() */
++ CCS_TASK_EGID, /* current_egid() */
++ CCS_TASK_SGID, /* current_sgid() */
++ CCS_TASK_FSGID, /* current_fsgid() */
++ CCS_TASK_PID, /* sys_getpid() */
++ CCS_TASK_PPID, /* sys_getppid() */
++ CCS_EXEC_ARGC, /* "struct linux_binprm *"->argc */
++ CCS_EXEC_ENVC, /* "struct linux_binprm *"->envc */
++ CCS_TYPE_IS_SOCKET, /* S_IFSOCK */
++ CCS_TYPE_IS_SYMLINK, /* S_IFLNK */
++ CCS_TYPE_IS_FILE, /* S_IFREG */
++ CCS_TYPE_IS_BLOCK_DEV, /* S_IFBLK */
++ CCS_TYPE_IS_DIRECTORY, /* S_IFDIR */
++ CCS_TYPE_IS_CHAR_DEV, /* S_IFCHR */
++ CCS_TYPE_IS_FIFO, /* S_IFIFO */
++ CCS_MODE_SETUID, /* S_ISUID */
++ CCS_MODE_SETGID, /* S_ISGID */
++ CCS_MODE_STICKY, /* S_ISVTX */
++ CCS_MODE_OWNER_READ, /* S_IRUSR */
++ CCS_MODE_OWNER_WRITE, /* S_IWUSR */
++ CCS_MODE_OWNER_EXECUTE, /* S_IXUSR */
++ CCS_MODE_GROUP_READ, /* S_IRGRP */
++ CCS_MODE_GROUP_WRITE, /* S_IWGRP */
++ CCS_MODE_GROUP_EXECUTE, /* S_IXGRP */
++ CCS_MODE_OTHERS_READ, /* S_IROTH */
++ CCS_MODE_OTHERS_WRITE, /* S_IWOTH */
++ CCS_MODE_OTHERS_EXECUTE, /* S_IXOTH */
++ CCS_TASK_TYPE, /* ((u8) task->ccs_flags) &
++ CCS_TASK_IS_EXECUTE_HANDLER */
++ CCS_TASK_EXECUTE_HANDLER, /* CCS_TASK_IS_EXECUTE_HANDLER */
++ CCS_EXEC_REALPATH,
++ CCS_SYMLINK_TARGET,
++ CCS_PATH1_UID,
++ CCS_PATH1_GID,
++ CCS_PATH1_INO,
++ CCS_PATH1_MAJOR,
++ CCS_PATH1_MINOR,
++ CCS_PATH1_PERM,
++ CCS_PATH1_TYPE,
++ CCS_PATH1_DEV_MAJOR,
++ CCS_PATH1_DEV_MINOR,
++ CCS_PATH2_UID,
++ CCS_PATH2_GID,
++ CCS_PATH2_INO,
++ CCS_PATH2_MAJOR,
++ CCS_PATH2_MINOR,
++ CCS_PATH2_PERM,
++ CCS_PATH2_TYPE,
++ CCS_PATH2_DEV_MAJOR,
++ CCS_PATH2_DEV_MINOR,
++ CCS_PATH1_PARENT_UID,
++ CCS_PATH1_PARENT_GID,
++ CCS_PATH1_PARENT_INO,
++ CCS_PATH1_PARENT_PERM,
++ CCS_PATH2_PARENT_UID,
++ CCS_PATH2_PARENT_GID,
++ CCS_PATH2_PARENT_INO,
++ CCS_PATH2_PARENT_PERM,
++ CCS_MAX_CONDITION_KEYWORD,
++ CCS_NUMBER_UNION,
++ CCS_NAME_UNION,
++ CCS_ARGV_ENTRY,
++ CCS_ENVP_ENTRY,
++};
++
++/* Index numbers for domain's attributes. */
++enum ccs_domain_info_flags_index {
++ /* Quota warnning flag. */
++ CCS_DIF_QUOTA_WARNED,
++ /*
++ * This domain was unable to create a new domain at
++ * ccs_find_next_domain() because the name of the domain to be created
++ * was too long or it could not allocate memory.
++ * More than one process continued execve() without domain transition.
++ */
++ CCS_DIF_TRANSITION_FAILED,
++ CCS_MAX_DOMAIN_INFO_FLAGS
++};
++
++/* Index numbers for audit type. */
++enum ccs_grant_log {
++ /* Follow profile's configuration. */
++ CCS_GRANTLOG_AUTO,
++ /* Do not generate grant log. */
++ CCS_GRANTLOG_NO,
++ /* Generate grant_log. */
++ CCS_GRANTLOG_YES,
++};
++
++/* Index numbers for group entries. */
++enum ccs_group_id {
++ CCS_PATH_GROUP,
++ CCS_NUMBER_GROUP,
++#ifdef CONFIG_CCSECURITY_NETWORK
++ CCS_ADDRESS_GROUP,
++#endif
++ CCS_MAX_GROUP
++};
++
++/* Index numbers for category of functionality. */
++enum ccs_mac_category_index {
++ CCS_MAC_CATEGORY_FILE,
++#ifdef CONFIG_CCSECURITY_NETWORK
++ CCS_MAC_CATEGORY_NETWORK,
++#endif
++#ifdef CONFIG_CCSECURITY_MISC
++ CCS_MAC_CATEGORY_MISC,
++#endif
++#ifdef CONFIG_CCSECURITY_IPC
++ CCS_MAC_CATEGORY_IPC,
++#endif
++#ifdef CONFIG_CCSECURITY_CAPABILITY
++ CCS_MAC_CATEGORY_CAPABILITY,
++#endif
++ CCS_MAX_MAC_CATEGORY_INDEX
++};
++
++/* Index numbers for functionality. */
++enum ccs_mac_index {
++ CCS_MAC_FILE_EXECUTE,
++ CCS_MAC_FILE_OPEN,
++ CCS_MAC_FILE_CREATE,
++ CCS_MAC_FILE_UNLINK,
++#ifdef CONFIG_CCSECURITY_FILE_GETATTR
++ CCS_MAC_FILE_GETATTR,
++#endif
++ CCS_MAC_FILE_MKDIR,
++ CCS_MAC_FILE_RMDIR,
++ CCS_MAC_FILE_MKFIFO,
++ CCS_MAC_FILE_MKSOCK,
++ CCS_MAC_FILE_TRUNCATE,
++ CCS_MAC_FILE_SYMLINK,
++ CCS_MAC_FILE_MKBLOCK,
++ CCS_MAC_FILE_MKCHAR,
++ CCS_MAC_FILE_LINK,
++ CCS_MAC_FILE_RENAME,
++ CCS_MAC_FILE_CHMOD,
++ CCS_MAC_FILE_CHOWN,
++ CCS_MAC_FILE_CHGRP,
++ CCS_MAC_FILE_IOCTL,
++ CCS_MAC_FILE_CHROOT,
++ CCS_MAC_FILE_MOUNT,
++ CCS_MAC_FILE_UMOUNT,
++ CCS_MAC_FILE_PIVOT_ROOT,
++#ifdef CONFIG_CCSECURITY_NETWORK
++ CCS_MAC_NETWORK_INET_STREAM_BIND,
++ CCS_MAC_NETWORK_INET_STREAM_LISTEN,
++ CCS_MAC_NETWORK_INET_STREAM_CONNECT,
++ CCS_MAC_NETWORK_INET_STREAM_ACCEPT,
++ CCS_MAC_NETWORK_INET_DGRAM_BIND,
++ CCS_MAC_NETWORK_INET_DGRAM_SEND,
++#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
++ CCS_MAC_NETWORK_INET_DGRAM_RECV,
++#endif
++ CCS_MAC_NETWORK_INET_RAW_BIND,
++ CCS_MAC_NETWORK_INET_RAW_SEND,
++#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
++ CCS_MAC_NETWORK_INET_RAW_RECV,
++#endif
++ CCS_MAC_NETWORK_UNIX_STREAM_BIND,
++ CCS_MAC_NETWORK_UNIX_STREAM_LISTEN,
++ CCS_MAC_NETWORK_UNIX_STREAM_CONNECT,
++ CCS_MAC_NETWORK_UNIX_STREAM_ACCEPT,
++ CCS_MAC_NETWORK_UNIX_DGRAM_BIND,
++ CCS_MAC_NETWORK_UNIX_DGRAM_SEND,
++#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
++ CCS_MAC_NETWORK_UNIX_DGRAM_RECV,
++#endif
++ CCS_MAC_NETWORK_UNIX_SEQPACKET_BIND,
++ CCS_MAC_NETWORK_UNIX_SEQPACKET_LISTEN,
++ CCS_MAC_NETWORK_UNIX_SEQPACKET_CONNECT,
++ CCS_MAC_NETWORK_UNIX_SEQPACKET_ACCEPT,
++#endif
++#ifdef CONFIG_CCSECURITY_MISC
++ CCS_MAC_ENVIRON,
++#endif
++#ifdef CONFIG_CCSECURITY_IPC
++ CCS_MAC_SIGNAL,
++#endif
++#ifdef CONFIG_CCSECURITY_CAPABILITY
++ CCS_MAC_CAPABILITY_USE_ROUTE_SOCKET,
++ CCS_MAC_CAPABILITY_USE_PACKET_SOCKET,
++ CCS_MAC_CAPABILITY_SYS_REBOOT,
++ CCS_MAC_CAPABILITY_SYS_VHANGUP,
++ CCS_MAC_CAPABILITY_SYS_SETTIME,
++ CCS_MAC_CAPABILITY_SYS_NICE,
++ CCS_MAC_CAPABILITY_SYS_SETHOSTNAME,
++ CCS_MAC_CAPABILITY_USE_KERNEL_MODULE,
++ CCS_MAC_CAPABILITY_SYS_KEXEC_LOAD,
++ CCS_MAC_CAPABILITY_SYS_PTRACE,
++#endif
++ CCS_MAX_MAC_INDEX
++};
++
++/* Index numbers for /proc/ccs/stat interface. */
++enum ccs_memory_stat_type {
++ CCS_MEMORY_POLICY,
++ CCS_MEMORY_AUDIT,
++ CCS_MEMORY_QUERY,
++ CCS_MAX_MEMORY_STAT
++};
++
++/* Index numbers for access controls with one pathname and three numbers. */
++enum ccs_mkdev_acl_index {
++ CCS_TYPE_MKBLOCK,
++ CCS_TYPE_MKCHAR,
++ CCS_MAX_MKDEV_OPERATION
++};
++
++/* Index numbers for operation mode. */
++enum ccs_mode_value {
++ CCS_CONFIG_DISABLED,
++ CCS_CONFIG_LEARNING,
++ CCS_CONFIG_PERMISSIVE,
++ CCS_CONFIG_ENFORCING,
++ CCS_CONFIG_MAX_MODE,
++ CCS_CONFIG_WANT_REJECT_LOG = 64,
++ CCS_CONFIG_WANT_GRANT_LOG = 128,
++ CCS_CONFIG_USE_DEFAULT = 255,
++};
++
++/* Index numbers for socket operations. */
++enum ccs_network_acl_index {
++ CCS_NETWORK_BIND, /* bind() operation. */
++ CCS_NETWORK_LISTEN, /* listen() operation. */
++ CCS_NETWORK_CONNECT, /* connect() operation. */
++ CCS_NETWORK_ACCEPT, /* accept() operation. */
++ CCS_NETWORK_SEND, /* send() operation. */
++#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
++ CCS_NETWORK_RECV, /* recv() operation. */
++#endif
++ CCS_MAX_NETWORK_OPERATION
++};
++
++/* Index numbers for access controls with two pathnames. */
++enum ccs_path2_acl_index {
++ CCS_TYPE_LINK,
++ CCS_TYPE_RENAME,
++ CCS_TYPE_PIVOT_ROOT,
++ CCS_MAX_PATH2_OPERATION
++};
++
++/* Index numbers for access controls with one pathname. */
++enum ccs_path_acl_index {
++ CCS_TYPE_EXECUTE,
++ CCS_TYPE_READ,
++ CCS_TYPE_WRITE,
++ CCS_TYPE_APPEND,
++ CCS_TYPE_UNLINK,
++#ifdef CONFIG_CCSECURITY_FILE_GETATTR
++ CCS_TYPE_GETATTR,
++#endif
++ CCS_TYPE_RMDIR,
++ CCS_TYPE_TRUNCATE,
++ CCS_TYPE_SYMLINK,
++ CCS_TYPE_CHROOT,
++ CCS_TYPE_UMOUNT,
++ CCS_MAX_PATH_OPERATION
++};
++
++/* Index numbers for access controls with one pathname and one number. */
++enum ccs_path_number_acl_index {
++ CCS_TYPE_CREATE,
++ CCS_TYPE_MKDIR,
++ CCS_TYPE_MKFIFO,
++ CCS_TYPE_MKSOCK,
++ CCS_TYPE_IOCTL,
++ CCS_TYPE_CHMOD,
++ CCS_TYPE_CHOWN,
++ CCS_TYPE_CHGRP,
++ CCS_MAX_PATH_NUMBER_OPERATION
++};
++
++/* Index numbers for stat(). */
++enum ccs_path_stat_index {
++ /* Do not change this order. */
++ CCS_PATH1,
++ CCS_PATH1_PARENT,
++ CCS_PATH2,
++ CCS_PATH2_PARENT,
++ CCS_MAX_PATH_STAT
++};
++
++/* Index numbers for entry type. */
++enum ccs_policy_id {
++#ifdef CONFIG_CCSECURITY_PORTRESERVE
++ CCS_ID_RESERVEDPORT,
++#endif
++ CCS_ID_GROUP,
++#ifdef CONFIG_CCSECURITY_NETWORK
++ CCS_ID_ADDRESS_GROUP,
++#endif
++ CCS_ID_PATH_GROUP,
++ CCS_ID_NUMBER_GROUP,
++ CCS_ID_AGGREGATOR,
++ CCS_ID_TRANSITION_CONTROL,
++ CCS_ID_MANAGER,
++ CCS_ID_CONDITION,
++ CCS_ID_NAME,
++ CCS_ID_ACL,
++ CCS_ID_DOMAIN,
++ CCS_MAX_POLICY
++};
++
++/* Index numbers for /proc/ccs/stat interface. */
++enum ccs_policy_stat_type {
++ /* Do not change this order. */
++ CCS_STAT_POLICY_UPDATES,
++ CCS_STAT_POLICY_LEARNING, /* == CCS_CONFIG_LEARNING */
++ CCS_STAT_POLICY_PERMISSIVE, /* == CCS_CONFIG_PERMISSIVE */
++ CCS_STAT_POLICY_ENFORCING, /* == CCS_CONFIG_ENFORCING */
++ CCS_MAX_POLICY_STAT
++};
++
++/* Index numbers for profile's PREFERENCE values. */
++enum ccs_pref_index {
++ CCS_PREF_MAX_AUDIT_LOG,
++ CCS_PREF_MAX_LEARNING_ENTRY,
++ CCS_PREF_ENFORCING_PENALTY,
++ CCS_MAX_PREF
++};
++
++/* Index numbers for /proc/ccs/ interfaces. */
++enum ccs_proc_interface_index {
++ CCS_DOMAIN_POLICY,
++ CCS_EXCEPTION_POLICY,
++ CCS_PROCESS_STATUS,
++ CCS_STAT,
++ CCS_AUDIT,
++ CCS_VERSION,
++ CCS_PROFILE,
++ CCS_QUERY,
++ CCS_MANAGER,
++#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
++ CCS_EXECUTE_HANDLER,
++#endif
++};
++
++/* Index numbers for special mount operations. */
++enum ccs_special_mount {
++ CCS_MOUNT_BIND, /* mount --bind /source /dest */
++ CCS_MOUNT_MOVE, /* mount --move /old /new */
++ CCS_MOUNT_REMOUNT, /* mount -o remount /dir */
++ CCS_MOUNT_MAKE_UNBINDABLE, /* mount --make-unbindable /dir */
++ CCS_MOUNT_MAKE_PRIVATE, /* mount --make-private /dir */
++ CCS_MOUNT_MAKE_SLAVE, /* mount --make-slave /dir */
++ CCS_MOUNT_MAKE_SHARED, /* mount --make-shared /dir */
++ CCS_MAX_SPECIAL_MOUNT
++};
++
++/* Index numbers for domain transition control keywords. */
++enum ccs_transition_type {
++ /* Do not change this order, */
++ CCS_TRANSITION_CONTROL_NO_RESET,
++ CCS_TRANSITION_CONTROL_RESET,
++ CCS_TRANSITION_CONTROL_NO_INITIALIZE,
++ CCS_TRANSITION_CONTROL_INITIALIZE,
++ CCS_TRANSITION_CONTROL_NO_KEEP,
++ CCS_TRANSITION_CONTROL_KEEP,
++ CCS_MAX_TRANSITION_TYPE
++};
++
++/* Index numbers for type of numeric values. */
++enum ccs_value_type {
++ CCS_VALUE_TYPE_INVALID,
++ CCS_VALUE_TYPE_DECIMAL,
++ CCS_VALUE_TYPE_OCTAL,
++ CCS_VALUE_TYPE_HEXADECIMAL,
++};
++
++/* Constants definition for internal use. */
++
++/*
++ * TOMOYO uses this hash only when appending a string into the string table.
++ * Frequency of appending strings is very low. So we don't need large (e.g.
++ * 64k) hash size. 256 will be sufficient.
++ */
++#define CCS_HASH_BITS 8
++#define CCS_MAX_HASH (1u << CCS_HASH_BITS)
++
++/*
++ * TOMOYO checks only SOCK_STREAM, SOCK_DGRAM, SOCK_RAW, SOCK_SEQPACKET.
++ * Therefore, we don't need SOCK_MAX.
++ */
++#define CCS_SOCK_MAX 6
++
++/* Size of temporary buffer for execve() operation. */
++#define CCS_EXEC_TMPSIZE 4096
++
++/* Garbage collector is trying to kfree() this element. */
++#define CCS_GC_IN_PROGRESS -1
++
++/* Profile number is an integer between 0 and 255. */
++#define CCS_MAX_PROFILES 256
++
++/* Group number is an integer between 0 and 255. */
++#define CCS_MAX_ACL_GROUPS 256
++
++/* Current thread is doing open(O_RDONLY | O_TRUNC) ? */
++#define CCS_OPEN_FOR_READ_TRUNCATE 1
++/* Current thread is doing open(3) ? */
++#define CCS_OPEN_FOR_IOCTL_ONLY 2
++/* Current thread is doing do_execve() ? */
++#define CCS_TASK_IS_IN_EXECVE 4
++/* Current thread is running as an execute handler program? */
++#define CCS_TASK_IS_EXECUTE_HANDLER 8
++/* Current thread is allowed to modify policy via /proc/ccs/ interface? */
++#define CCS_TASK_IS_MANAGER 16
++
++/*
++ * Retry this request. Returned by ccs_supervisor() if policy violation has
++ * occurred in enforcing mode and the userspace daemon decided to retry.
++ *
++ * We must choose a positive value in order to distinguish "granted" (which is
++ * 0) and "rejected" (which is a negative value) and "retry".
++ */
++#define CCS_RETRY_REQUEST 1
++
++/* Ignore gfp flags which are not supported. */
++#ifndef __GFP_HIGHIO
++#define __GFP_HIGHIO 0
++#endif
++#ifndef __GFP_NOWARN
++#define __GFP_NOWARN 0
++#endif
++#ifndef __GFP_NORETRY
++#define __GFP_NORETRY 0
++#endif
++#ifndef __GFP_NOMEMALLOC
++#define __GFP_NOMEMALLOC 0
++#endif
++
++/* The gfp flags used by TOMOYO. */
++#define CCS_GFP_FLAGS (__GFP_WAIT | __GFP_IO | __GFP_HIGHIO | __GFP_NOWARN | \
++ __GFP_NORETRY | __GFP_NOMEMALLOC)
++
++/* Size of read buffer for /proc/ccs/ interface. */
++#define CCS_MAX_IO_READ_QUEUE 64
++
++/* Structure definition for internal use. */
++
++/* Common header for holding ACL entries. */
++struct ccs_acl_head {
++ struct list_head list;
++ s8 is_deleted; /* true or false or CCS_GC_IN_PROGRESS */
++} __packed;
++
++/* Common header for shared entries. */
++struct ccs_shared_acl_head {
++ struct list_head list;
++ atomic_t users;
++} __packed;
++
++/* Common header for individual entries. */
++struct ccs_acl_info {
++ struct list_head list;
++ struct ccs_condition *cond; /* Maybe NULL. */
++ s8 is_deleted; /* true or false or CCS_GC_IN_PROGRESS */
++ u8 type; /* One of values in "enum ccs_acl_entry_type_index". */
++ u16 perm;
++} __packed;
++
++/* Structure for holding a word. */
++struct ccs_name_union {
++ /* Either @filename or @group is NULL. */
++ const struct ccs_path_info *filename;
++ struct ccs_group *group;
++};
++
++/* Structure for holding a number. */
++struct ccs_number_union {
++ unsigned long values[2];
++ struct ccs_group *group; /* Maybe NULL. */
++ /* One of values in "enum ccs_value_type". */
++ u8 value_type[2];
++};
++
++/* Structure for holding an IP address. */
++struct ccs_ipaddr_union {
++ struct in6_addr ip[2]; /* Big endian. */
++ struct ccs_group *group; /* Pointer to address group. */
++ bool is_ipv6; /* Valid only if @group == NULL. */
++};
++
++/* Structure for "path_group"/"number_group"/"address_group" directive. */
++struct ccs_group {
++ struct ccs_shared_acl_head head;
++ /* Name of group (without leading '@'). */
++ const struct ccs_path_info *group_name;
++ /*
++ * List of "struct ccs_path_group" or "struct ccs_number_group" or
++ * "struct ccs_address_group".
++ */
++ struct list_head member_list;
++};
++
++/* Structure for "path_group" directive. */
++struct ccs_path_group {
++ struct ccs_acl_head head;
++ const struct ccs_path_info *member_name;
++};
++
++/* Structure for "number_group" directive. */
++struct ccs_number_group {
++ struct ccs_acl_head head;
++ struct ccs_number_union number;
++};
++
++/* Structure for "address_group" directive. */
++struct ccs_address_group {
++ struct ccs_acl_head head;
++ /* Structure for holding an IP address. */
++ struct ccs_ipaddr_union address;
++};
++
++/* Subset of "struct stat". Used by conditional ACL and audit logs. */
++struct ccs_mini_stat {
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0)
++ kuid_t uid;
++ kgid_t gid;
++#else
++ uid_t uid;
++ gid_t gid;
++#endif
++ ino_t ino;
++ umode_t mode;
++ dev_t dev;
++ dev_t rdev;
++};
++
++/* Structure for dumping argv[] and envp[] of "struct linux_binprm". */
++struct ccs_page_dump {
++ struct page *page; /* Previously dumped page. */
++ char *data; /* Contents of "page". Size is PAGE_SIZE. */
++};
++
++/* Structure for attribute checks in addition to pathname checks. */
++struct ccs_obj_info {
++ /* True if ccs_get_attributes() was already called, false otherwise. */
++ bool validate_done;
++ /* True if @stat[] is valid. */
++ bool stat_valid[CCS_MAX_PATH_STAT];
++ /* First pathname. Initialized with { NULL, NULL } if no path. */
++ struct path path1;
++ /* Second pathname. Initialized with { NULL, NULL } if no path. */
++ struct path path2;
++ /*
++ * Information on @path1, @path1's parent directory, @path2, @path2's
++ * parent directory.
++ */
++ struct ccs_mini_stat stat[CCS_MAX_PATH_STAT];
++ /*
++ * Content of symbolic link to be created. NULL for operations other
++ * than symlink().
++ */
++ struct ccs_path_info *symlink_target;
++};
++
++/* Structure for entries which follows "struct ccs_condition". */
++struct ccs_condition_element {
++ /*
++ * Left hand operand. A "struct ccs_argv" for CCS_ARGV_ENTRY, a
++ * "struct ccs_envp" for CCS_ENVP_ENTRY is attached to the tail
++ * of the array of this struct.
++ */
++ u8 left;
++ /*
++ * Right hand operand. A "struct ccs_number_union" for
++ * CCS_NUMBER_UNION, a "struct ccs_name_union" for CCS_NAME_UNION is
++ * attached to the tail of the array of this struct.
++ */
++ u8 right;
++ /* Equation operator. True if equals or overlaps, false otherwise. */
++ bool equals;
++};
++
++/* Structure for optional arguments. */
++struct ccs_condition {
++ struct ccs_shared_acl_head head;
++ u32 size; /* Memory size allocated for this entry. */
++ u16 condc; /* Number of conditions in this struct. */
++ u16 numbers_count; /* Number of "struct ccs_number_union values". */
++ u16 names_count; /* Number of "struct ccs_name_union names". */
++ u16 argc; /* Number of "struct ccs_argv". */
++ u16 envc; /* Number of "struct ccs_envp". */
++ u8 grant_log; /* One of values in "enum ccs_grant_log". */
++ bool exec_transit; /* True if transit is for "file execute". */
++ const struct ccs_path_info *transit; /* Maybe NULL. */
++ /*
++ * struct ccs_condition_element condition[condc];
++ * struct ccs_number_union values[numbers_count];
++ * struct ccs_name_union names[names_count];
++ * struct ccs_argv argv[argc];
++ * struct ccs_envp envp[envc];
++ */
++};
++
++struct ccs_execve;
++struct ccs_policy_namespace;
++
++/* Structure for request info. */
++struct ccs_request_info {
++ /*
++ * For holding parameters specific to operations which deal files.
++ * NULL if not dealing files.
++ */
++ struct ccs_obj_info *obj;
++ /*
++ * For holding parameters specific to execve() request.
++ * NULL if not dealing do_execve().
++ */
++ struct ccs_execve *ee;
++ /*
++ * For holding parameters.
++ * Pointers in this union are not NULL except path->matched_path.
++ */
++ union {
++ struct {
++ const struct ccs_path_info *filename;
++ /*
++ * For using wildcards at ccs_find_next_domain().
++ *
++ * The matched_acl cannot be used because it may refer
++ * a "struct ccs_path_acl" with ->is_group == true.
++ * We want to use exact "struct ccs_path_info" rather
++ * than "struct ccs_path_acl".
++ */
++ const struct ccs_path_info *matched_path;
++ /* One of values in "enum ccs_path_acl_index". */
++ u8 operation;
++ } path;
++ struct {
++ const struct ccs_path_info *filename1;
++ const struct ccs_path_info *filename2;
++ /* One of values in "enum ccs_path2_acl_index". */
++ u8 operation;
++ } path2;
++ struct {
++ const struct ccs_path_info *filename;
++ unsigned int mode;
++ unsigned int major;
++ unsigned int minor;
++ /* One of values in "enum ccs_mkdev_acl_index". */
++ u8 operation;
++ } mkdev;
++ struct {
++ const struct ccs_path_info *filename;
++ unsigned long number;
++ /*
++ * One of values in "enum ccs_path_number_acl_index".
++ */
++ u8 operation;
++ } path_number;
++#ifdef CONFIG_CCSECURITY_NETWORK
++ struct {
++ const u32 *address; /* Big endian. */
++ u16 port; /* Host endian. */
++ /* One of values smaller than CCS_SOCK_MAX. */
++ u8 protocol;
++ /* One of values in "enum ccs_network_acl_index". */
++ u8 operation;
++ bool is_ipv6;
++ } inet_network;
++ struct {
++ const struct ccs_path_info *address;
++ /* One of values smaller than CCS_SOCK_MAX. */
++ u8 protocol;
++ /* One of values in "enum ccs_network_acl_index". */
++ u8 operation;
++ } unix_network;
++#endif
++#ifdef CONFIG_CCSECURITY_MISC
++ struct {
++ const struct ccs_path_info *name;
++ } environ;
++#endif
++#ifdef CONFIG_CCSECURITY_CAPABILITY
++ struct {
++ /* One of values in "enum ccs_capability_acl_index". */
++ u8 operation;
++ } capability;
++#endif
++#ifdef CONFIG_CCSECURITY_IPC
++ struct {
++ const char *dest_pattern;
++ int sig;
++ } signal;
++#endif
++ struct {
++ const struct ccs_path_info *type;
++ const struct ccs_path_info *dir;
++ const struct ccs_path_info *dev;
++ unsigned long flags;
++ int need_dev;
++ } mount;
++#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
++ struct {
++ const struct ccs_path_info *domainname;
++ } task;
++#endif
++ } param;
++ /*
++ * For updating current->ccs_domain_info at ccs_update_task_domain().
++ * Initialized to NULL at ccs_init_request_info().
++ * Matching "struct ccs_acl_info" is copied if access request was
++ * granted. Re-initialized to NULL at ccs_update_task_domain().
++ */
++ struct ccs_acl_info *matched_acl;
++ u8 param_type; /* One of values in "enum ccs_acl_entry_type_index". */
++ bool granted; /* True if granted, false otherwise. */
++ /* True if current thread should not be carried sleep penalty. */
++ bool dont_sleep_on_enforce_error;
++ /*
++ * For counting number of retries made for this request.
++ * This counter is incremented whenever ccs_supervisor() returned
++ * CCS_RETRY_REQUEST.
++ */
++ u8 retry;
++ /*
++ * For holding profile number used for this request.
++ * One of values between 0 and CCS_MAX_PROFILES - 1.
++ */
++ u8 profile;
++ /*
++ * For holding operation mode used for this request.
++ * One of CCS_CONFIG_DISABLED, CCS_CONFIG_LEARNING,
++ * CCS_CONFIG_PERMISSIVE, CCS_CONFIG_ENFORCING.
++ */
++ u8 mode;
++ /*
++ * For holding operation index used for this request.
++ * Used by ccs_init_request_info() / ccs_get_mode() /
++ * ccs_write_log(). One of values in "enum ccs_mac_index".
++ */
++ u8 type;
++};
++
++/* Structure for holding a token. */
++struct ccs_path_info {
++ const char *name;
++ u32 hash; /* = full_name_hash(name, strlen(name)) */
++ u16 total_len; /* = strlen(name) */
++ u16 const_len; /* = ccs_const_part_length(name) */
++ bool is_dir; /* = ccs_strendswith(name, "/") */
++ bool is_patterned; /* = const_len < total_len */
++};
++
++/* Structure for execve() operation. */
++struct ccs_execve {
++ struct ccs_request_info r;
++ struct ccs_obj_info obj;
++ struct linux_binprm *bprm;
++ struct ccs_domain_info *previous_domain;
++ const struct ccs_path_info *transition;
++ /* For execute_handler */
++ const struct ccs_path_info *handler;
++ char *handler_path; /* = kstrdup(handler->name, CCS_GFP_FLAGS) */
++ /* For dumping argv[] and envp[]. */
++ struct ccs_page_dump dump;
++ /* For temporary use. */
++ char *tmp; /* Size is CCS_EXEC_TMPSIZE bytes */
++};
++
++/* Structure for domain information. */
++struct ccs_domain_info {
++ struct list_head list;
++ struct list_head acl_info_list;
++ /* Name of this domain. Never NULL. */
++ const struct ccs_path_info *domainname;
++ /* Namespace for this domain. Never NULL. */
++ struct ccs_policy_namespace *ns;
++ /* Group numbers to use. */
++ unsigned long group[CCS_MAX_ACL_GROUPS / BITS_PER_LONG];
++ u8 profile; /* Profile number to use. */
++ bool is_deleted; /* Delete flag. */
++ bool flags[CCS_MAX_DOMAIN_INFO_FLAGS];
++};
++
++/*
++ * Structure for "reset_domain"/"no_reset_domain"/"initialize_domain"/
++ * "no_initialize_domain"/"keep_domain"/"no_keep_domain" keyword.
++ */
++struct ccs_transition_control {
++ struct ccs_acl_head head;
++ u8 type; /* One of values in "enum ccs_transition_type" */
++ bool is_last_name; /* True if the domainname is ccs_last_word(). */
++ const struct ccs_path_info *domainname; /* Maybe NULL */
++ const struct ccs_path_info *program; /* Maybe NULL */
++};
++
++/* Structure for "aggregator" keyword. */
++struct ccs_aggregator {
++ struct ccs_acl_head head;
++ const struct ccs_path_info *original_name;
++ const struct ccs_path_info *aggregated_name;
++};
++
++/* Structure for "deny_autobind" keyword. */
++struct ccs_reserved {
++ struct ccs_acl_head head;
++ struct ccs_number_union port;
++};
++
++/* Structure for policy manager. */
++struct ccs_manager {
++ struct ccs_acl_head head;
++ /* A path to program or a domainname. */
++ const struct ccs_path_info *manager;
++};
++
++/* Structure for argv[]. */
++struct ccs_argv {
++ unsigned long index;
++ const struct ccs_path_info *value;
++ bool is_not;
++};
++
++/* Structure for envp[]. */
++struct ccs_envp {
++ const struct ccs_path_info *name;
++ const struct ccs_path_info *value;
++ bool is_not;
++};
++
++/*
++ * Structure for "task auto_execute_handler" and "task denied_execute_handler"
++ * directive.
++ *
++ * If "task auto_execute_handler" directive exists and the current process is
++ * not an execute handler, all execve() requests are replaced by execve()
++ * requests of a program specified by "task auto_execute_handler" directive.
++ * If the current process is an execute handler, "task auto_execute_handler"
++ * and "task denied_execute_handler" directives are ignored.
++ * The program specified by "task execute_handler" validates execve()
++ * parameters and executes the original execve() requests if appropriate.
++ *
++ * "task denied_execute_handler" directive is used only when execve() request
++ * was rejected in enforcing mode (i.e. CONFIG::file::execute={ mode=enforcing
++ * }). The program specified by "task denied_execute_handler" does whatever it
++ * wants to do (e.g. silently terminate, change firewall settings, redirect the
++ * user to honey pot etc.).
++ */
++struct ccs_handler_acl {
++ struct ccs_acl_info head; /* type = CCS_TYPE_*_EXECUTE_HANDLER */
++ const struct ccs_path_info *handler; /* Pointer to single pathname. */
++};
++
++/*
++ * Structure for "task auto_domain_transition" and
++ * "task manual_domain_transition" directive.
++ */
++struct ccs_task_acl {
++ struct ccs_acl_info head; /* type = CCS_TYPE_*_TASK_ACL */
++ /* Pointer to domainname. */
++ const struct ccs_path_info *domainname;
++};
++
++/*
++ * Structure for "file execute", "file read", "file write", "file append",
++ * "file unlink", "file getattr", "file rmdir", "file truncate",
++ * "file symlink", "file chroot" and "file unmount" directive.
++ */
++struct ccs_path_acl {
++ struct ccs_acl_info head; /* type = CCS_TYPE_PATH_ACL */
++ struct ccs_name_union name;
++};
++
++/*
++ * Structure for "file rename", "file link" and "file pivot_root" directive.
++ */
++struct ccs_path2_acl {
++ struct ccs_acl_info head; /* type = CCS_TYPE_PATH2_ACL */
++ struct ccs_name_union name1;
++ struct ccs_name_union name2;
++};
++
++/*
++ * Structure for "file create", "file mkdir", "file mkfifo", "file mksock",
++ * "file ioctl", "file chmod", "file chown" and "file chgrp" directive.
++ */
++struct ccs_path_number_acl {
++ struct ccs_acl_info head; /* type = CCS_TYPE_PATH_NUMBER_ACL */
++ struct ccs_name_union name;
++ struct ccs_number_union number;
++};
++
++/* Structure for "file mkblock" and "file mkchar" directive. */
++struct ccs_mkdev_acl {
++ struct ccs_acl_info head; /* type = CCS_TYPE_MKDEV_ACL */
++ struct ccs_name_union name;
++ struct ccs_number_union mode;
++ struct ccs_number_union major;
++ struct ccs_number_union minor;
++};
++
++/* Structure for "file mount" directive. */
++struct ccs_mount_acl {
++ struct ccs_acl_info head; /* type = CCS_TYPE_MOUNT_ACL */
++ struct ccs_name_union dev_name;
++ struct ccs_name_union dir_name;
++ struct ccs_name_union fs_type;
++ struct ccs_number_union flags;
++};
++
++/* Structure for "misc env" directive in domain policy. */
++struct ccs_env_acl {
++ struct ccs_acl_info head; /* type = CCS_TYPE_ENV_ACL */
++ const struct ccs_path_info *env; /* environment variable */
++};
++
++/* Structure for "capability" directive. */
++struct ccs_capability_acl {
++ struct ccs_acl_info head; /* type = CCS_TYPE_CAPABILITY_ACL */
++ u8 operation; /* One of values in "enum ccs_capability_acl_index". */
++};
++
++/* Structure for "ipc signal" directive. */
++struct ccs_signal_acl {
++ struct ccs_acl_info head; /* type = CCS_TYPE_SIGNAL_ACL */
++ struct ccs_number_union sig;
++ /* Pointer to destination pattern. */
++ const struct ccs_path_info *domainname;
++};
++
++/* Structure for "network inet" directive. */
++struct ccs_inet_acl {
++ struct ccs_acl_info head; /* type = CCS_TYPE_INET_ACL */
++ u8 protocol;
++ struct ccs_ipaddr_union address;
++ struct ccs_number_union port;
++};
++
++/* Structure for "network unix" directive. */
++struct ccs_unix_acl {
++ struct ccs_acl_info head; /* type = CCS_TYPE_UNIX_ACL */
++ u8 protocol;
++ struct ccs_name_union name;
++};
++
++/* Structure for holding string data. */
++struct ccs_name {
++ struct ccs_shared_acl_head head;
++ int size; /* Memory size allocated for this entry. */
++ struct ccs_path_info entry;
++};
++
++/* Structure for holding a line from /proc/ccs/ interface. */
++struct ccs_acl_param {
++ char *data; /* Unprocessed data. */
++ struct list_head *list; /* List to add or remove. */
++ struct ccs_policy_namespace *ns; /* Namespace to use. */
++ bool is_delete; /* True if it is a delete request. */
++ union ccs_acl_union {
++ struct ccs_acl_info acl_info;
++ struct ccs_handler_acl handler_acl;
++ struct ccs_task_acl task_acl;
++ struct ccs_path_acl path_acl;
++ struct ccs_path2_acl path2_acl;
++ struct ccs_path_number_acl path_number_acl;
++ struct ccs_mkdev_acl mkdev_acl;
++ struct ccs_mount_acl mount_acl;
++ struct ccs_env_acl env_acl;
++ struct ccs_capability_acl capability_acl;
++ struct ccs_signal_acl signal_acl;
++ struct ccs_inet_acl inet_acl;
++ struct ccs_unix_acl unix_acl;
++ /**/
++ struct ccs_acl_head acl_head;
++ struct ccs_transition_control transition_control;
++ struct ccs_aggregator aggregator;
++ struct ccs_reserved reserved;
++ struct ccs_manager manager;
++ struct ccs_path_group path_group;
++ struct ccs_number_group number_group;
++ struct ccs_address_group address_group;
++ } e;
++};
++
++/* Structure for reading/writing policy via /proc/ccs/ interfaces. */
++struct ccs_io_buffer {
++ /* Exclusive lock for this structure. */
++ struct mutex io_sem;
++ char __user *read_user_buf;
++ size_t read_user_buf_avail;
++ struct {
++ struct list_head *ns;
++ struct list_head *domain;
++ struct list_head *group;
++ struct list_head *acl;
++ size_t avail;
++ unsigned int step;
++ unsigned int query_index;
++ u16 index;
++ u16 cond_index;
++ u8 acl_group_index;
++ u8 cond_step;
++ u8 bit;
++ u8 w_pos;
++ bool eof;
++ bool print_this_domain_only;
++ bool print_transition_related_only;
++ bool print_cond_part;
++ const char *w[CCS_MAX_IO_READ_QUEUE];
++ } r;
++ struct {
++ struct ccs_policy_namespace *ns;
++ struct ccs_domain_info *domain;
++ size_t avail;
++ bool is_delete;
++ } w;
++ /* Buffer for reading. */
++ char *read_buf;
++ /* Size of read buffer. */
++ size_t readbuf_size;
++ /* Buffer for writing. */
++ char *write_buf;
++ /* Size of write buffer. */
++ size_t writebuf_size;
++ /* Type of interface. */
++ enum ccs_proc_interface_index type;
++ /* Users counter protected by ccs_io_buffer_list_lock. */
++ u8 users;
++ /* List for telling GC not to kfree() elements. */
++ struct list_head list;
++};
++
++/* Structure for /proc/ccs/profile interface. */
++struct ccs_profile {
++ const struct ccs_path_info *comment;
++ u8 default_config;
++ u8 config[CCS_MAX_MAC_INDEX + CCS_MAX_MAC_CATEGORY_INDEX];
++ unsigned int pref[CCS_MAX_PREF];
++};
++
++/* Structure for representing YYYY/MM/DD hh/mm/ss. */
++struct ccs_time {
++ u16 year;
++ u8 month;
++ u8 day;
++ u8 hour;
++ u8 min;
++ u8 sec;
++};
++
++/* Structure for policy namespace. */
++struct ccs_policy_namespace {
++ /* Profile table. Memory is allocated as needed. */
++ struct ccs_profile *profile_ptr[CCS_MAX_PROFILES];
++ /* List of "struct ccs_group". */
++ struct list_head group_list[CCS_MAX_GROUP];
++ /* List of policy. */
++ struct list_head policy_list[CCS_MAX_POLICY];
++ /* The global ACL referred by "use_group" keyword. */
++ struct list_head acl_group[CCS_MAX_ACL_GROUPS];
++ /* List for connecting to ccs_namespace_list list. */
++ struct list_head namespace_list;
++ /* Profile version. Currently only 20150505 is supported. */
++ unsigned int profile_version;
++ /* Name of this namespace (e.g. "<kernel>", "</usr/sbin/httpd>" ). */
++ const char *name;
++};
++
++/* Prototype definition for "struct ccsecurity_operations". */
++
++void __init ccs_permission_init(void);
++void __init ccs_mm_init(void);
++
++/* Prototype definition for internal use. */
++
++bool ccs_dump_page(struct linux_binprm *bprm, unsigned long pos,
++ struct ccs_page_dump *dump);
++bool ccs_memory_ok(const void *ptr, const unsigned int size);
++char *ccs_encode(const char *str);
++char *ccs_encode2(const char *str, int str_len);
++char *ccs_realpath(const struct path *path);
++const char *ccs_get_exe(void);
++const struct ccs_path_info *ccs_get_name(const char *name);
++int ccs_audit_log(struct ccs_request_info *r);
++int ccs_check_acl(struct ccs_request_info *r);
++int ccs_init_request_info(struct ccs_request_info *r, const u8 index);
++struct ccs_domain_info *ccs_assign_domain(const char *domainname,
++ const bool transit);
++u8 ccs_get_config(const u8 profile, const u8 index);
++void *ccs_commit_ok(void *data, const unsigned int size);
++void ccs_del_acl(struct list_head *element);
++void ccs_del_condition(struct list_head *element);
++void ccs_fill_path_info(struct ccs_path_info *ptr);
++void ccs_get_attributes(struct ccs_obj_info *obj);
++void ccs_notify_gc(struct ccs_io_buffer *head, const bool is_register);
++void ccs_transition_failed(const char *domainname);
++void ccs_warn_oom(const char *function);
++void ccs_write_log(struct ccs_request_info *r, const char *fmt, ...)
++ __printf(2, 3);
++
++/* Variable definition for internal use. */
++
++extern bool ccs_policy_loaded;
++extern const char * const ccs_dif[CCS_MAX_DOMAIN_INFO_FLAGS];
++extern const u8 ccs_c2mac[CCS_MAX_CAPABILITY_INDEX];
++extern const u8 ccs_pn2mac[CCS_MAX_PATH_NUMBER_OPERATION];
++extern const u8 ccs_pnnn2mac[CCS_MAX_MKDEV_OPERATION];
++extern const u8 ccs_pp2mac[CCS_MAX_PATH2_OPERATION];
++extern struct ccs_domain_info ccs_kernel_domain;
++extern struct list_head ccs_condition_list;
++extern struct list_head ccs_domain_list;
++extern struct list_head ccs_name_list[CCS_MAX_HASH];
++extern struct list_head ccs_namespace_list;
++extern struct mutex ccs_policy_lock;
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19)
++extern struct srcu_struct ccs_ss;
++#endif
++extern unsigned int ccs_memory_quota[CCS_MAX_MEMORY_STAT];
++extern unsigned int ccs_memory_used[CCS_MAX_MEMORY_STAT];
++
++/* Inlined functions for internal use. */
++
++/**
++ * ccs_pathcmp - strcmp() for "struct ccs_path_info" structure.
++ *
++ * @a: Pointer to "struct ccs_path_info".
++ * @b: Pointer to "struct ccs_path_info".
++ *
++ * Returns true if @a != @b, false otherwise.
++ */
++static inline bool ccs_pathcmp(const struct ccs_path_info *a,
++ const struct ccs_path_info *b)
++{
++ return a->hash != b->hash || strcmp(a->name, b->name);
++}
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19)
++
++/**
++ * ccs_read_lock - Take lock for protecting policy.
++ *
++ * Returns index number for ccs_read_unlock().
++ */
++static inline int ccs_read_lock(void)
++{
++ return srcu_read_lock(&ccs_ss);
++}
++
++/**
++ * ccs_read_unlock - Release lock for protecting policy.
++ *
++ * @idx: Index number returned by ccs_read_lock().
++ *
++ * Returns nothing.
++ */
++static inline void ccs_read_unlock(const int idx)
++{
++ srcu_read_unlock(&ccs_ss, idx);
++}
++
++#else
++
++int ccs_lock(void);
++void ccs_unlock(const int idx);
++
++/**
++ * ccs_read_lock - Take lock for protecting policy.
++ *
++ * Returns index number for ccs_read_unlock().
++ */
++static inline int ccs_read_lock(void)
++{
++ return ccs_lock();
++}
++
++/**
++ * ccs_read_unlock - Release lock for protecting policy.
++ *
++ * @idx: Index number returned by ccs_read_lock().
++ *
++ * Returns nothing.
++ */
++static inline void ccs_read_unlock(const int idx)
++{
++ ccs_unlock(idx);
++}
++
++#endif
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 18)
++
++/**
++ * ccs_tasklist_lock - Take lock for reading list of "struct task_struct".
++ *
++ * Returns nothing.
++ */
++static inline void ccs_tasklist_lock(void)
++{
++ rcu_read_lock();
++}
++
++/**
++ * ccs_tasklist_unlock - Release lock for reading list of "struct task_struct".
++ *
++ * Returns nothing.
++ */
++static inline void ccs_tasklist_unlock(void)
++{
++ rcu_read_unlock();
++}
++
++#else
++
++/**
++ * ccs_tasklist_lock - Take lock for reading list of "struct task_struct".
++ *
++ * Returns nothing.
++ */
++static inline void ccs_tasklist_lock(void)
++{
++ read_lock(&tasklist_lock);
++}
++
++/**
++ * ccs_tasklist_unlock - Release lock for reading list of "struct task_struct".
++ *
++ * Returns nothing.
++ */
++static inline void ccs_tasklist_unlock(void)
++{
++ read_unlock(&tasklist_lock);
++}
++
++#endif
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24)
++
++/**
++ * ccs_sys_getppid - Copy of getppid().
++ *
++ * Returns parent process's PID.
++ *
++ * Alpha does not have getppid() defined. To be able to build this module on
++ * Alpha, I have to copy getppid() from kernel/timer.c.
++ */
++static inline pid_t ccs_sys_getppid(void)
++{
++ pid_t pid;
++ rcu_read_lock();
++ pid = task_tgid_vnr(rcu_dereference(current->real_parent));
++ rcu_read_unlock();
++ return pid;
++}
++
++#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0)
++
++/**
++ * ccs_sys_getppid - Copy of getppid().
++ *
++ * Returns parent process's PID.
++ *
++ * This function was rewritten to use RCU in 2.6.16.34. However, distributors
++ * which use earlier kernels (e.g. 2.6.8/2.6.9) did not backport the bugfix.
++ * Therefore, I'm using code for 2.6.16.34 for earlier kernels.
++ */
++static inline pid_t ccs_sys_getppid(void)
++{
++ pid_t pid;
++ rcu_read_lock();
++#if (defined(RHEL_MAJOR) && RHEL_MAJOR == 5) || (defined(AX_MAJOR) && AX_MAJOR == 3)
++ pid = rcu_dereference(current->parent)->tgid;
++#elif defined(CONFIG_UTRACE)
++ /*
++ * RHEL 5.0 kernel does not have RHEL_MAJOR/RHEL_MINOR defined.
++ * Assume RHEL 5.0 if CONFIG_UTRACE is defined.
++ */
++ pid = rcu_dereference(current->parent)->tgid;
++#else
++ pid = rcu_dereference(current->real_parent)->tgid;
++#endif
++ rcu_read_unlock();
++ return pid;
++}
++
++#else
++
++/**
++ * ccs_sys_getppid - Copy of getppid().
++ *
++ * Returns parent process's PID.
++ *
++ * I can't use code for 2.6.16.34 for 2.4 kernels because 2.4 kernels does not
++ * have RCU. Therefore, I'm using pessimistic lock (i.e. tasklist_lock
++ * spinlock).
++ */
++static inline pid_t ccs_sys_getppid(void)
++{
++ pid_t pid;
++ read_lock(&tasklist_lock);
++#ifdef TASK_DEAD
++ pid = current->group_leader->real_parent->tgid;
++#else
++ pid = current->p_opptr->pid;
++#endif
++ read_unlock(&tasklist_lock);
++ return pid;
++}
++
++#endif
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24)
++
++/**
++ * ccs_sys_getpid - Copy of getpid().
++ *
++ * Returns current thread's PID.
++ *
++ * Alpha does not have getpid() defined. To be able to build this module on
++ * Alpha, I have to copy getpid() from kernel/timer.c.
++ */
++static inline pid_t ccs_sys_getpid(void)
++{
++ return task_tgid_vnr(current);
++}
++
++#else
++
++/**
++ * ccs_sys_getpid - Copy of getpid().
++ *
++ * Returns current thread's PID.
++ */
++static inline pid_t ccs_sys_getpid(void)
++{
++ return current->tgid;
++}
++
++#endif
++
++/**
++ * ccs_get_mode - Get mode for specified functionality.
++ *
++ * @profile: Profile number.
++ * @index: Functionality number.
++ *
++ * Returns mode.
++ */
++static inline u8 ccs_get_mode(const u8 profile, const u8 index)
++{
++ return ccs_get_config(profile, index) & (CCS_CONFIG_MAX_MODE - 1);
++}
++
++#if defined(CONFIG_SLOB)
++
++/**
++ * ccs_round2 - Round up to power of 2 for calculating memory usage.
++ *
++ * @size: Size to be rounded up.
++ *
++ * Returns @size.
++ *
++ * Since SLOB does not round up, this function simply returns @size.
++ */
++static inline int ccs_round2(size_t size)
++{
++ return size;
++}
++
++#else
++
++/**
++ * ccs_round2 - Round up to power of 2 for calculating memory usage.
++ *
++ * @size: Size to be rounded up.
++ *
++ * Returns rounded size.
++ *
++ * Strictly speaking, SLAB may be able to allocate (e.g.) 96 bytes instead of
++ * (e.g.) 128 bytes.
++ */
++static inline int ccs_round2(size_t size)
++{
++#if PAGE_SIZE == 4096
++ size_t bsize = 32;
++#else
++ size_t bsize = 64;
++#endif
++ if (!size)
++ return 0;
++ while (size > bsize)
++ bsize <<= 1;
++ return bsize;
++}
++
++#endif
++
++/**
++ * ccs_put_condition - Drop reference on "struct ccs_condition".
++ *
++ * @cond: Pointer to "struct ccs_condition". Maybe NULL.
++ *
++ * Returns nothing.
++ */
++static inline void ccs_put_condition(struct ccs_condition *cond)
++{
++ if (cond)
++ atomic_dec(&cond->head.users);
++}
++
++/**
++ * ccs_put_group - Drop reference on "struct ccs_group".
++ *
++ * @group: Pointer to "struct ccs_group". Maybe NULL.
++ *
++ * Returns nothing.
++ */
++static inline void ccs_put_group(struct ccs_group *group)
++{
++ if (group)
++ atomic_dec(&group->head.users);
++}
++
++/**
++ * ccs_put_name - Drop reference on "struct ccs_name".
++ *
++ * @name: Pointer to "struct ccs_path_info". Maybe NULL.
++ *
++ * Returns nothing.
++ */
++static inline void ccs_put_name(const struct ccs_path_info *name)
++{
++ if (name)
++ atomic_dec(&container_of(name, struct ccs_name, entry)->
++ head.users);
++}
++
++/* For importing variables and functions. */
++extern const struct ccsecurity_exports ccsecurity_exports;
++
++#ifdef CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY
++
++/*
++ * Structure for holding "struct ccs_domain_info *" and "struct ccs_execve *"
++ * and "u32 ccs_flags" for each "struct task_struct".
++ *
++ * "struct ccs_domain_info *" and "u32 ccs_flags" for each "struct task_struct"
++ * are maintained outside that "struct task_struct". Therefore, ccs_security
++ * != task_struct . This keeps KABI for distributor's prebuilt kernels but
++ * entails slow access.
++ *
++ * Memory for this structure is allocated when current thread tries to access
++ * it. Therefore, if memory allocation failed, current thread will be killed by
++ * SIGKILL. Note that if current->pid == 1, sending SIGKILL won't work.
++ */
++struct ccs_security {
++ struct list_head list;
++ const struct task_struct *task;
++ struct ccs_domain_info *ccs_domain_info;
++ u32 ccs_flags;
++ struct rcu_head rcu;
++};
++
++#define CCS_TASK_SECURITY_HASH_BITS 12
++#define CCS_MAX_TASK_SECURITY_HASH (1u << CCS_TASK_SECURITY_HASH_BITS)
++extern struct list_head ccs_task_security_list[CCS_MAX_TASK_SECURITY_HASH];
++
++struct ccs_security *ccs_find_task_security(const struct task_struct *task);
++
++/**
++ * ccs_current_security - Get "struct ccs_security" for current thread.
++ *
++ * Returns pointer to "struct ccs_security" for current thread.
++ */
++static inline struct ccs_security *ccs_current_security(void)
++{
++ return ccs_find_task_security(current);
++}
++
++/**
++ * ccs_task_domain - Get "struct ccs_domain_info" for specified thread.
++ *
++ * @task: Pointer to "struct task_struct".
++ *
++ * Returns pointer to "struct ccs_security" for specified thread.
++ */
++static inline struct ccs_domain_info *ccs_task_domain(struct task_struct *task)
++{
++ struct ccs_domain_info *domain;
++ rcu_read_lock();
++ domain = ccs_find_task_security(task)->ccs_domain_info;
++ rcu_read_unlock();
++ return domain;
++}
++
++/**
++ * ccs_current_domain - Get "struct ccs_domain_info" for current thread.
++ *
++ * Returns pointer to "struct ccs_domain_info" for current thread.
++ */
++static inline struct ccs_domain_info *ccs_current_domain(void)
++{
++ return ccs_find_task_security(current)->ccs_domain_info;
++}
++
++/**
++ * ccs_task_flags - Get flags for specified thread.
++ *
++ * @task: Pointer to "struct task_struct".
++ *
++ * Returns flags for specified thread.
++ */
++static inline u32 ccs_task_flags(struct task_struct *task)
++{
++ u32 ccs_flags;
++ rcu_read_lock();
++ ccs_flags = ccs_find_task_security(task)->ccs_flags;
++ rcu_read_unlock();
++ return ccs_flags;
++}
++
++/**
++ * ccs_current_flags - Get flags for current thread.
++ *
++ * Returns flags for current thread.
++ */
++static inline u32 ccs_current_flags(void)
++{
++ return ccs_find_task_security(current)->ccs_flags;
++}
++
++#else
++
++/*
++ * "struct ccs_domain_info *" and "u32 ccs_flags" for each "struct task_struct"
++ * are maintained inside that "struct task_struct". Therefore, ccs_security ==
++ * task_struct . This allows fast access but breaks KABI checks for
++ * distributor's prebuilt kernels due to changes in "struct task_struct".
++ */
++#define ccs_security task_struct
++
++/**
++ * ccs_find_task_security - Find "struct ccs_security" for given task.
++ *
++ * @task: Pointer to "struct task_struct".
++ *
++ * Returns pointer to "struct ccs_security".
++ */
++static inline struct ccs_security *ccs_find_task_security(struct task_struct *
++ task)
++{
++ return task;
++}
++
++/**
++ * ccs_current_security - Get "struct ccs_security" for current thread.
++ *
++ * Returns pointer to "struct ccs_security" for current thread.
++ */
++static inline struct ccs_security *ccs_current_security(void)
++{
++ return ccs_find_task_security(current);
++}
++
++/**
++ * ccs_task_domain - Get "struct ccs_domain_info" for specified thread.
++ *
++ * @task: Pointer to "struct task_struct".
++ *
++ * Returns pointer to "struct ccs_security" for specified thread.
++ */
++static inline struct ccs_domain_info *ccs_task_domain(struct task_struct *task)
++{
++ struct ccs_domain_info *domain = task->ccs_domain_info;
++ return domain ? domain : &ccs_kernel_domain;
++}
++
++/**
++ * ccs_current_domain - Get "struct ccs_domain_info" for current thread.
++ *
++ * Returns pointer to "struct ccs_domain_info" for current thread.
++ *
++ * If current thread does not belong to a domain (which is true for initial
++ * init_task in order to hide ccs_kernel_domain from this module),
++ * current thread enters into ccs_kernel_domain.
++ */
++static inline struct ccs_domain_info *ccs_current_domain(void)
++{
++ struct task_struct *task = current;
++ if (!task->ccs_domain_info)
++ task->ccs_domain_info = &ccs_kernel_domain;
++ return task->ccs_domain_info;
++}
++
++/**
++ * ccs_task_flags - Get flags for specified thread.
++ *
++ * @task: Pointer to "struct task_struct".
++ *
++ * Returns flags for specified thread.
++ */
++static inline u32 ccs_task_flags(struct task_struct *task)
++{
++ return ccs_find_task_security(task)->ccs_flags;
++}
++
++/**
++ * ccs_current_flags - Get flags for current thread.
++ *
++ * Returns flags for current thread.
++ */
++static inline u32 ccs_current_flags(void)
++{
++ return ccs_find_task_security(current)->ccs_flags;
++}
++
++#endif
++
++/**
++ * ccs_current_namespace - Get "struct ccs_policy_namespace" for current thread.
++ *
++ * Returns pointer to "struct ccs_policy_namespace" for current thread.
++ */
++static inline struct ccs_policy_namespace *ccs_current_namespace(void)
++{
++ return ccs_current_domain()->ns;
++}
++
++#endif
+diff --git a/security/ccsecurity/load_policy.c b/security/ccsecurity/load_policy.c
+new file mode 100644
+index 0000000..fc4ae30
+--- /dev/null
++++ b/security/ccsecurity/load_policy.c
+@@ -0,0 +1,352 @@
++/*
++ * security/ccsecurity/load_policy.c
++ *
++ * Copyright (C) 2005-2012 NTT DATA CORPORATION
++ *
++ * Version: 1.8.4 2015/05/05
++ */
++
++#include <linux/version.h>
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/binfmts.h>
++#include <linux/sched.h>
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
++#include <linux/kmod.h>
++/*
++ * Regarding 2.4 kernels, we need to define __KERNEL_SYSCALLS__ in order to use
++ * waitpid() because call_usermodehelper() does not support UMH_WAIT_PROC.
++ */
++#define __KERNEL_SYSCALLS__
++#include <linux/unistd.h>
++#else
++#include <linux/fs.h>
++#include <linux/namei.h>
++#endif
++#ifndef LOOKUP_POSITIVE
++#define LOOKUP_POSITIVE 0
++#endif
++
++/*
++ * TOMOYO specific part start.
++ */
++
++#include <linux/ccsecurity.h>
++
++/**
++ * ccs_setup - Set enable/disable upon boot.
++ *
++ * @str: "off" to disable, "on" to enable.
++ *
++ * Returns 0.
++ */
++static int __init ccs_setup(char *str)
++{
++ if (!strcmp(str, "off"))
++ ccsecurity_ops.disabled = 1;
++ else if (!strcmp(str, "on"))
++ ccsecurity_ops.disabled = 0;
++ return 0;
++}
++
++__setup("ccsecurity=", ccs_setup);
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 0, 0)
++#include "lsm2ccsecurity.c"
++#endif
++
++#ifndef CONFIG_CCSECURITY_OMIT_USERSPACE_LOADER
++
++/* Path to the policy loader. (default = CONFIG_CCSECURITY_POLICY_LOADER) */
++static const char *ccs_loader;
++
++/**
++ * ccs_loader_setup - Set policy loader.
++ *
++ * @str: Program to use as a policy loader (e.g. /sbin/ccs-init ).
++ *
++ * Returns 0.
++ */
++static int __init ccs_loader_setup(char *str)
++{
++ ccs_loader = str;
++ return 0;
++}
++
++__setup("CCS_loader=", ccs_loader_setup);
++
++/**
++ * ccs_policy_loader_exists - Check whether /sbin/ccs-init exists.
++ *
++ * Returns true if /sbin/ccs-init exists, false otherwise.
++ */
++static _Bool ccs_policy_loader_exists(void)
++{
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
++ struct path path;
++ if (!ccs_loader)
++ ccs_loader = CONFIG_CCSECURITY_POLICY_LOADER;
++ if (kern_path(ccs_loader, LOOKUP_FOLLOW | LOOKUP_POSITIVE,
++ &path) == 0) {
++ path_put(&path);
++ return 1;
++ }
++#else
++ struct nameidata nd;
++ if (!ccs_loader)
++ ccs_loader = CONFIG_CCSECURITY_POLICY_LOADER;
++ if (path_lookup(ccs_loader, LOOKUP_FOLLOW | LOOKUP_POSITIVE,
++ &nd) == 0) {
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
++ path_put(&nd.path);
++#else
++ path_release(&nd);
++#endif
++ return 1;
++ }
++#endif
++ printk(KERN_INFO "Not activating Mandatory Access Control "
++ "as %s does not exist.\n", ccs_loader);
++ return 0;
++}
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
++
++/**
++ * ccs_run_loader - Start /sbin/ccs-init.
++ *
++ * @unused: Not used.
++ *
++ * Returns PID of /sbin/ccs-init on success, negative value otherwise.
++ */
++static int ccs_run_loader(void *unused)
++{
++ char *argv[2];
++ char *envp[3];
++ printk(KERN_INFO "Calling %s to load policy. Please wait.\n",
++ ccs_loader);
++ argv[0] = (char *) ccs_loader;
++ argv[1] = NULL;
++ envp[0] = "HOME=/";
++ envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
++ envp[2] = NULL;
++ return exec_usermodehelper(argv[0], argv, envp);
++}
++
++#endif
++
++/* Path to the trigger. (default = CONFIG_CCSECURITY_ACTIVATION_TRIGGER) */
++static const char *ccs_trigger;
++
++/**
++ * ccs_trigger_setup - Set trigger for activation.
++ *
++ * @str: Program to use as an activation trigger (e.g. /sbin/init ).
++ *
++ * Returns 0.
++ */
++static int __init ccs_trigger_setup(char *str)
++{
++ ccs_trigger = str;
++ return 0;
++}
++
++__setup("CCS_trigger=", ccs_trigger_setup);
++
++/**
++ * ccs_load_policy - Run external policy loader to load policy.
++ *
++ * @filename: The program about to start.
++ *
++ * Returns nothing.
++ *
++ * This function checks whether @filename is /sbin/init, and if so
++ * invoke /sbin/ccs-init and wait for the termination of /sbin/ccs-init
++ * and then continues invocation of /sbin/init.
++ * /sbin/ccs-init reads policy files in /etc/ccs/ directory and
++ * writes to /proc/ccs/ interfaces.
++ */
++static void ccs_load_policy(const char *filename)
++{
++ static _Bool done;
++ if (ccsecurity_ops.disabled || done)
++ return;
++ if (!ccs_trigger)
++ ccs_trigger = CONFIG_CCSECURITY_ACTIVATION_TRIGGER;
++ if (strcmp(filename, ccs_trigger))
++ return;
++ if (!ccs_policy_loader_exists())
++ return;
++ done = 1;
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0)
++ {
++ char *argv[2];
++ char *envp[3];
++ printk(KERN_INFO "Calling %s to load policy. Please wait.\n",
++ ccs_loader);
++ argv[0] = (char *) ccs_loader;
++ argv[1] = NULL;
++ envp[0] = "HOME=/";
++ envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
++ envp[2] = NULL;
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23) || defined(UMH_WAIT_PROC)
++ call_usermodehelper(argv[0], argv, envp, UMH_WAIT_PROC);
++#else
++ call_usermodehelper(argv[0], argv, envp, 1);
++#endif
++ }
++#elif defined(TASK_DEAD)
++ {
++ /* Copied from kernel/kmod.c */
++ struct task_struct *task = current;
++ pid_t pid = kernel_thread(ccs_run_loader, NULL, 0);
++ sigset_t tmpsig;
++ spin_lock_irq(&task->sighand->siglock);
++ tmpsig = task->blocked;
++ siginitsetinv(&task->blocked,
++ sigmask(SIGKILL) | sigmask(SIGSTOP));
++ recalc_sigpending();
++ spin_unlock_irq(&task->sighand->siglock);
++ if (pid >= 0)
++ waitpid(pid, NULL, __WCLONE);
++ spin_lock_irq(&task->sighand->siglock);
++ task->blocked = tmpsig;
++ recalc_sigpending();
++ spin_unlock_irq(&task->sighand->siglock);
++ }
++#else
++ {
++ /* Copied from kernel/kmod.c */
++ struct task_struct *task = current;
++ pid_t pid = kernel_thread(ccs_run_loader, NULL, 0);
++ sigset_t tmpsig;
++ spin_lock_irq(&task->sigmask_lock);
++ tmpsig = task->blocked;
++ siginitsetinv(&task->blocked,
++ sigmask(SIGKILL) | sigmask(SIGSTOP));
++ recalc_sigpending(task);
++ spin_unlock_irq(&task->sigmask_lock);
++ if (pid >= 0)
++ waitpid(pid, NULL, __WCLONE);
++ spin_lock_irq(&task->sigmask_lock);
++ task->blocked = tmpsig;
++ recalc_sigpending(task);
++ spin_unlock_irq(&task->sigmask_lock);
++ }
++#endif
++ if (ccsecurity_ops.check_profile)
++ ccsecurity_ops.check_profile();
++ else
++ panic("Failed to load policy.");
++}
++
++#endif
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 8, 0)
++
++/**
++ * __ccs_search_binary_handler - Load policy before calling search_binary_handler().
++ *
++ * @bprm: Pointer to "struct linux_binprm".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_search_binary_handler(struct linux_binprm *bprm)
++{
++#ifndef CONFIG_CCSECURITY_OMIT_USERSPACE_LOADER
++ ccs_load_policy(bprm->filename);
++#endif
++ /*
++ * ccs_load_policy() executes /sbin/ccs-init if bprm->filename is
++ * /sbin/init. /sbin/ccs-init executes /etc/ccs/ccs-load-module to
++ * load loadable kernel module. The loadable kernel module modifies
++ * "struct ccsecurity_ops". Thus, we need to transfer control to
++ * __ccs_search_binary_handler() in security/ccsecurity/permission.c
++ * if "struct ccsecurity_ops" was modified.
++ */
++ if (ccsecurity_ops.search_binary_handler
++ != __ccs_search_binary_handler)
++ return ccsecurity_ops.search_binary_handler(bprm);
++ return search_binary_handler(bprm);
++}
++
++#else
++
++/**
++ * __ccs_search_binary_handler - Load policy before calling search_binary_handler().
++ *
++ * @bprm: Pointer to "struct linux_binprm".
++ * @regs: Pointer to "struct pt_regs".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_search_binary_handler(struct linux_binprm *bprm,
++ struct pt_regs *regs)
++{
++#ifndef CONFIG_CCSECURITY_OMIT_USERSPACE_LOADER
++ ccs_load_policy(bprm->filename);
++#endif
++ /*
++ * ccs_load_policy() executes /sbin/ccs-init if bprm->filename is
++ * /sbin/init. /sbin/ccs-init executes /etc/ccs/ccs-load-module to
++ * load loadable kernel module. The loadable kernel module modifies
++ * "struct ccsecurity_ops". Thus, we need to transfer control to
++ * __ccs_search_binary_handler() in security/ccsecurity/permission.c
++ * if "struct ccsecurity_ops" was modified.
++ */
++ if (ccsecurity_ops.search_binary_handler
++ != __ccs_search_binary_handler)
++ return ccsecurity_ops.search_binary_handler(bprm, regs);
++ return search_binary_handler(bprm, regs);
++}
++
++#endif
++
++/*
++ * Some exports for loadable kernel module part.
++ *
++ * Although scripts/checkpatch.pl complains about use of "extern" in C file,
++ * we don't put these into security/ccsecurity/internal.h because we want to
++ * split built-in part and loadable kernel module part.
++ */
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) && LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 35)
++extern spinlock_t vfsmount_lock;
++#endif
++
++/* For exporting variables and functions. */
++const struct ccsecurity_exports ccsecurity_exports = {
++#ifndef CONFIG_CCSECURITY_OMIT_USERSPACE_LOADER
++ .load_policy = ccs_load_policy,
++#endif
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0) && defined(CONFIG_SECURITY)
++ .add_hooks = ccs_add_hooks,
++#endif
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 2, 0)
++ .d_absolute_path = d_absolute_path,
++#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36)
++ .__d_path = __d_path,
++#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0)
++ .vfsmount_lock = &vfsmount_lock,
++#endif
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24)
++ .find_task_by_vpid = find_task_by_vpid,
++ .find_task_by_pid_ns = find_task_by_pid_ns,
++#endif
++};
++#ifdef CONFIG_CCSECURITY_LKM
++/* Only ccsecurity module need to access this struct. */
++EXPORT_SYMBOL_GPL(ccsecurity_exports);
++#endif
++
++/* Members are updated by loadable kernel module. */
++struct ccsecurity_operations ccsecurity_ops = {
++ .search_binary_handler = __ccs_search_binary_handler,
++#ifdef CONFIG_CCSECURITY_DISABLE_BY_DEFAULT
++ .disabled = 1,
++#endif
++};
++/*
++ * Non-GPL modules might need to access this struct via inlined functions
++ * embedded into include/linux/security.h and include/net/ip.h
++ */
++EXPORT_SYMBOL(ccsecurity_ops);
+diff --git a/security/ccsecurity/lsm2ccsecurity.c b/security/ccsecurity/lsm2ccsecurity.c
+new file mode 100644
+index 0000000..b81d8ed
+--- /dev/null
++++ b/security/ccsecurity/lsm2ccsecurity.c
+@@ -0,0 +1,192 @@
++/*
++ * security/ccsecurity/lsm2ccsecurity.c
++ *
++ * Copyright (C) 2005-2012 NTT DATA CORPORATION
++ *
++ * Version: 1.8.4 2015/07/11
++ */
++
++#include <linux/path.h>
++#include <linux/security.h>
++#include <linux/ccsecurity.h>
++
++int ccs_settime(const struct timespec *ts, const struct timezone *tz)
++{
++ return ccs_capable(CCS_SYS_SETTIME) ? 0 : -EPERM;
++}
++
++int ccs_sb_mount(const char *dev_name, struct path *path, const char *type,
++ unsigned long flags, void *data)
++{
++ return ccs_mount_permission(dev_name, path, type, flags, data);
++}
++
++int ccs_sb_umount(struct vfsmount *mnt, int flags)
++{
++ return ccs_umount_permission(mnt, flags);
++}
++
++int ccs_sb_pivotroot(struct path *old_path, struct path *new_path)
++{
++ return ccs_pivot_root_permission(old_path, new_path);
++}
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 1, 0)
++int ccs_inode_getattr(struct vfsmount *mnt, struct dentry *dentry)
++{
++ return ccs_getattr_permission(mnt, dentry);
++}
++#else
++int ccs_inode_getattr(const struct path *path)
++{
++ return ccs_getattr_permission(path->mnt, path->dentry);
++}
++#endif
++
++int ccs_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
++{
++ return ccs_ioctl_permission(file, cmd, arg);
++}
++
++int ccs_file_fcntl(struct file *file, unsigned int cmd, unsigned long arg)
++{
++ return ccs_fcntl_permission(file, cmd, arg);
++}
++
++int ccs_file_open(struct file *file, const struct cred *cred)
++{
++ return ccs_open_permission(file);
++}
++
++int ccs_socket_create(int family, int type, int protocol, int kern)
++{
++ return ccs_socket_create_permission(family, type, protocol);
++}
++
++int ccs_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
++{
++ return ccs_socket_bind_permission(sock, address, addrlen);
++}
++
++int ccs_socket_connect(struct socket *sock, struct sockaddr *address,
++ int addrlen)
++{
++ return ccs_socket_connect_permission(sock, address, addrlen);
++}
++
++int ccs_socket_listen(struct socket *sock, int backlog)
++{
++ return ccs_socket_listen_permission(sock);
++}
++
++int ccs_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
++{
++ return ccs_socket_sendmsg_permission(sock, msg, size);
++}
++
++int ccs_path_unlink(struct path *dir, struct dentry *dentry)
++{
++ return ccs_unlink_permission(dentry, dir->mnt);
++}
++
++int ccs_path_mkdir(struct path *dir, struct dentry *dentry, umode_t mode)
++{
++ return ccs_mkdir_permission(dentry, dir->mnt, mode);
++}
++
++int ccs_path_rmdir(struct path *dir, struct dentry *dentry)
++{
++ return ccs_rmdir_permission(dentry, dir->mnt);
++}
++
++int ccs_path_mknod(struct path *dir, struct dentry *dentry, umode_t mode,
++ unsigned int dev)
++{
++ return ccs_mknod_permission(dentry, dir->mnt, mode, dev);
++}
++
++int ccs_path_truncate(struct path *path)
++{
++ return ccs_truncate_permission(path->dentry, path->mnt);
++}
++
++int ccs_path_symlink(struct path *dir, struct dentry *dentry,
++ const char *old_name)
++{
++ return ccs_symlink_permission(dentry, dir->mnt, old_name);
++}
++
++int ccs_path_link(struct dentry *old_dentry, struct path *new_dir,
++ struct dentry *new_dentry)
++{
++ return ccs_link_permission(old_dentry, new_dentry, new_dir->mnt);
++}
++
++int ccs_path_rename(struct path *old_dir, struct dentry *old_dentry,
++ struct path *new_dir, struct dentry *new_dentry)
++{
++ return ccs_rename_permission(old_dentry, new_dentry, new_dir->mnt);
++}
++
++int ccs_path_chmod(struct path *path, umode_t mode)
++{
++ return ccs_chmod_permission(path->dentry, path->mnt, mode);
++}
++
++int ccs_path_chown(struct path *path, kuid_t uid, kgid_t gid)
++{
++ return ccs_chown_permission(path->dentry, path->mnt, uid, gid);
++}
++
++int ccs_path_chroot(struct path *path)
++{
++ return ccs_chroot_permission(path);
++}
++
++#if !defined(CONFIG_SECURITY_PATH)
++EXPORT_SYMBOL(ccs_path_mkdir);
++EXPORT_SYMBOL(ccs_path_mknod);
++EXPORT_SYMBOL(ccs_path_unlink);
++EXPORT_SYMBOL(ccs_path_rename);
++#endif
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0) && defined(CONFIG_SECURITY)
++
++#include <linux/lsm_hooks.h>
++
++static struct security_hook_list ccsecurity_hooks[] = {
++ LSM_HOOK_INIT(settime, ccs_settime),
++ LSM_HOOK_INIT(sb_mount, ccs_sb_mount),
++ LSM_HOOK_INIT(sb_umount, ccs_sb_umount),
++ LSM_HOOK_INIT(sb_pivotroot, ccs_sb_pivotroot),
++ LSM_HOOK_INIT(inode_getattr, ccs_inode_getattr),
++ LSM_HOOK_INIT(file_ioctl, ccs_file_ioctl),
++ LSM_HOOK_INIT(file_fcntl, ccs_file_fcntl),
++ LSM_HOOK_INIT(file_open, ccs_file_open),
++#if defined(CONFIG_SECURITY_NETWORK)
++ LSM_HOOK_INIT(socket_create, ccs_socket_create),
++ LSM_HOOK_INIT(socket_bind, ccs_socket_bind),
++ LSM_HOOK_INIT(socket_connect, ccs_socket_connect),
++ LSM_HOOK_INIT(socket_listen, ccs_socket_listen),
++ LSM_HOOK_INIT(socket_sendmsg, ccs_socket_sendmsg),
++#endif
++#if defined(CONFIG_SECURITY_PATH)
++ LSM_HOOK_INIT(path_unlink, ccs_path_unlink),
++ LSM_HOOK_INIT(path_mkdir, ccs_path_mkdir),
++ LSM_HOOK_INIT(path_rmdir, ccs_path_rmdir),
++ LSM_HOOK_INIT(path_mknod, ccs_path_mknod),
++ LSM_HOOK_INIT(path_truncate, ccs_path_truncate),
++ LSM_HOOK_INIT(path_symlink, ccs_path_symlink),
++ LSM_HOOK_INIT(path_link, ccs_path_link),
++ LSM_HOOK_INIT(path_rename, ccs_path_rename),
++ LSM_HOOK_INIT(path_chmod, ccs_path_chmod),
++ LSM_HOOK_INIT(path_chown, ccs_path_chown),
++ LSM_HOOK_INIT(path_chroot, ccs_path_chroot),
++#endif
++};
++
++static void ccs_add_hooks(void)
++{
++ security_add_hooks(ccsecurity_hooks, ARRAY_SIZE(ccsecurity_hooks));
++}
++#endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0) && defined(CONFIG_SECURITY) */
+diff --git a/security/ccsecurity/memory.c b/security/ccsecurity/memory.c
+new file mode 100644
+index 0000000..6514a26
+--- /dev/null
++++ b/security/ccsecurity/memory.c
+@@ -0,0 +1,356 @@
++/*
++ * security/ccsecurity/memory.c
++ *
++ * Copyright (C) 2005-2012 NTT DATA CORPORATION
++ *
++ * Version: 1.8.4 2015/05/05
++ */
++
++#include "internal.h"
++
++/***** SECTION1: Constants definition *****/
++
++/***** SECTION2: Structure definition *****/
++
++/***** SECTION3: Prototype definition section *****/
++
++bool ccs_memory_ok(const void *ptr, const unsigned int size);
++const struct ccs_path_info *ccs_get_name(const char *name);
++#ifdef CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY
++struct ccs_security *ccs_find_task_security(const struct task_struct *task);
++#endif
++void *ccs_commit_ok(void *data, const unsigned int size);
++void __init ccs_mm_init(void);
++void ccs_warn_oom(const char *function);
++
++#ifdef CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY
++static int __ccs_alloc_task_security(const struct task_struct *task);
++static void __ccs_free_task_security(const struct task_struct *task);
++static void ccs_add_task_security(struct ccs_security *ptr,
++ struct list_head *list);
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 8)
++static void ccs_rcu_free(struct rcu_head *rcu);
++#else
++static void ccs_rcu_free(void *arg);
++#endif
++#endif
++
++/***** SECTION4: Standalone functions section *****/
++
++/***** SECTION5: Variables definition section *****/
++
++/* Memoy currently used by policy/audit log/query. */
++unsigned int ccs_memory_used[CCS_MAX_MEMORY_STAT];
++
++/* Memory quota for "policy"/"audit log"/"query". */
++unsigned int ccs_memory_quota[CCS_MAX_MEMORY_STAT];
++
++/* The list for "struct ccs_name". */
++struct list_head ccs_name_list[CCS_MAX_HASH];
++
++#ifdef CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY
++
++/* Dummy security context for avoiding NULL pointer dereference. */
++static struct ccs_security ccs_oom_security = {
++ .ccs_domain_info = &ccs_kernel_domain
++};
++
++/* Dummy security context for avoiding NULL pointer dereference. */
++static struct ccs_security ccs_default_security = {
++ .ccs_domain_info = &ccs_kernel_domain
++};
++
++/* List of "struct ccs_security". */
++struct list_head ccs_task_security_list[CCS_MAX_TASK_SECURITY_HASH];
++/* Lock for protecting ccs_task_security_list[]. */
++static DEFINE_SPINLOCK(ccs_task_security_list_lock);
++
++#endif
++
++/***** SECTION6: Dependent functions section *****/
++
++/**
++ * ccs_warn_oom - Print out of memory warning message.
++ *
++ * @function: Function's name.
++ *
++ * Returns nothing.
++ */
++void ccs_warn_oom(const char *function)
++{
++ /* Reduce error messages. */
++ static pid_t ccs_last_pid;
++ const pid_t pid = current->pid;
++ if (ccs_last_pid != pid) {
++ printk(KERN_WARNING "ERROR: Out of memory at %s.\n",
++ function);
++ ccs_last_pid = pid;
++ }
++ if (!ccs_policy_loaded)
++ panic("MAC Initialization failed.\n");
++}
++
++/**
++ * ccs_memory_ok - Check memory quota.
++ *
++ * @ptr: Pointer to allocated memory. Maybe NULL.
++ * @size: Size in byte. Not used if @ptr is NULL.
++ *
++ * Returns true if @ptr is not NULL and quota not exceeded, false otherwise.
++ *
++ * Caller holds ccs_policy_lock mutex.
++ */
++bool ccs_memory_ok(const void *ptr, const unsigned int size)
++{
++ if (ptr) {
++ const size_t s = ccs_round2(size);
++ ccs_memory_used[CCS_MEMORY_POLICY] += s;
++ if (!ccs_memory_quota[CCS_MEMORY_POLICY] ||
++ ccs_memory_used[CCS_MEMORY_POLICY] <=
++ ccs_memory_quota[CCS_MEMORY_POLICY])
++ return true;
++ ccs_memory_used[CCS_MEMORY_POLICY] -= s;
++ }
++ ccs_warn_oom(__func__);
++ return false;
++}
++
++/**
++ * ccs_commit_ok - Allocate memory and check memory quota.
++ *
++ * @data: Data to copy from.
++ * @size: Size in byte.
++ *
++ * Returns pointer to allocated memory on success, NULL otherwise.
++ * @data is zero-cleared on success.
++ *
++ * Caller holds ccs_policy_lock mutex.
++ */
++void *ccs_commit_ok(void *data, const unsigned int size)
++{
++ void *ptr = kmalloc(size, CCS_GFP_FLAGS);
++ if (ccs_memory_ok(ptr, size)) {
++ memmove(ptr, data, size);
++ memset(data, 0, size);
++ return ptr;
++ }
++ kfree(ptr);
++ return NULL;
++}
++
++/**
++ * ccs_get_name - Allocate memory for string data.
++ *
++ * @name: The string to store into the permernent memory.
++ *
++ * Returns pointer to "struct ccs_path_info" on success, NULL otherwise.
++ */
++const struct ccs_path_info *ccs_get_name(const char *name)
++{
++ struct ccs_name *ptr;
++ unsigned int hash;
++ int len;
++ int allocated_len;
++ struct list_head *head;
++
++ if (!name)
++ return NULL;
++ len = strlen(name) + 1;
++ hash = full_name_hash((const unsigned char *) name, len - 1);
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) || defined(RHEL_MAJOR)
++ head = &ccs_name_list[hash_long(hash, CCS_HASH_BITS)];
++#else
++ head = &ccs_name_list[hash % CCS_MAX_HASH];
++#endif
++ if (mutex_lock_interruptible(&ccs_policy_lock))
++ return NULL;
++ list_for_each_entry(ptr, head, head.list) {
++ if (hash != ptr->entry.hash || strcmp(name, ptr->entry.name) ||
++ atomic_read(&ptr->head.users) == CCS_GC_IN_PROGRESS)
++ continue;
++ atomic_inc(&ptr->head.users);
++ goto out;
++ }
++ allocated_len = sizeof(*ptr) + len;
++ ptr = kzalloc(allocated_len, CCS_GFP_FLAGS);
++ if (ccs_memory_ok(ptr, allocated_len)) {
++ ptr->entry.name = ((char *) ptr) + sizeof(*ptr);
++ memmove((char *) ptr->entry.name, name, len);
++ atomic_set(&ptr->head.users, 1);
++ ccs_fill_path_info(&ptr->entry);
++ ptr->size = allocated_len;
++ list_add_tail(&ptr->head.list, head);
++ } else {
++ kfree(ptr);
++ ptr = NULL;
++ }
++out:
++ mutex_unlock(&ccs_policy_lock);
++ return ptr ? &ptr->entry : NULL;
++}
++
++#ifdef CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY
++
++/**
++ * ccs_add_task_security - Add "struct ccs_security" to list.
++ *
++ * @ptr: Pointer to "struct ccs_security".
++ * @list: Pointer to "struct list_head".
++ *
++ * Returns nothing.
++ */
++static void ccs_add_task_security(struct ccs_security *ptr,
++ struct list_head *list)
++{
++ unsigned long flags;
++ spin_lock_irqsave(&ccs_task_security_list_lock, flags);
++ list_add_rcu(&ptr->list, list);
++ spin_unlock_irqrestore(&ccs_task_security_list_lock, flags);
++}
++
++/**
++ * __ccs_alloc_task_security - Allocate memory for new tasks.
++ *
++ * @task: Pointer to "struct task_struct".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_alloc_task_security(const struct task_struct *task)
++{
++ struct ccs_security *old_security = ccs_current_security();
++ struct ccs_security *new_security = kzalloc(sizeof(*new_security),
++ GFP_KERNEL);
++ struct list_head *list = &ccs_task_security_list
++ [hash_ptr((void *) task, CCS_TASK_SECURITY_HASH_BITS)];
++ if (!new_security)
++ return -ENOMEM;
++ new_security->task = task;
++ new_security->ccs_domain_info = old_security->ccs_domain_info;
++ new_security->ccs_flags = old_security->ccs_flags;
++ ccs_add_task_security(new_security, list);
++ return 0;
++}
++
++/**
++ * ccs_find_task_security - Find "struct ccs_security" for given task.
++ *
++ * @task: Pointer to "struct task_struct".
++ *
++ * Returns pointer to "struct ccs_security" on success, &ccs_oom_security on
++ * out of memory, &ccs_default_security otherwise.
++ *
++ * If @task is current thread and "struct ccs_security" for current thread was
++ * not found, I try to allocate it. But if allocation failed, current thread
++ * will be killed by SIGKILL. Note that if current->pid == 1, sending SIGKILL
++ * won't work.
++ */
++struct ccs_security *ccs_find_task_security(const struct task_struct *task)
++{
++ struct ccs_security *ptr;
++ struct list_head *list = &ccs_task_security_list
++ [hash_ptr((void *) task, CCS_TASK_SECURITY_HASH_BITS)];
++ /* Make sure INIT_LIST_HEAD() in ccs_mm_init() takes effect. */
++ while (!list->next);
++ rcu_read_lock();
++ list_for_each_entry_rcu(ptr, list, list) {
++ if (ptr->task != task)
++ continue;
++ rcu_read_unlock();
++ return ptr;
++ }
++ rcu_read_unlock();
++ if (task != current)
++ return &ccs_default_security;
++ /* Use GFP_ATOMIC because caller may have called rcu_read_lock(). */
++ ptr = kzalloc(sizeof(*ptr), GFP_ATOMIC);
++ if (!ptr) {
++ printk(KERN_WARNING "Unable to allocate memory for pid=%u\n",
++ task->pid);
++ send_sig(SIGKILL, current, 0);
++ return &ccs_oom_security;
++ }
++ *ptr = ccs_default_security;
++ ptr->task = task;
++ ccs_add_task_security(ptr, list);
++ return ptr;
++}
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 8)
++
++/**
++ * ccs_rcu_free - RCU callback for releasing "struct ccs_security".
++ *
++ * @rcu: Pointer to "struct rcu_head".
++ *
++ * Returns nothing.
++ */
++static void ccs_rcu_free(struct rcu_head *rcu)
++{
++ struct ccs_security *ptr = container_of(rcu, typeof(*ptr), rcu);
++ kfree(ptr);
++}
++
++#else
++
++/**
++ * ccs_rcu_free - RCU callback for releasing "struct ccs_security".
++ *
++ * @arg: Pointer to "void".
++ *
++ * Returns nothing.
++ */
++static void ccs_rcu_free(void *arg)
++{
++ struct ccs_security *ptr = arg;
++ kfree(ptr);
++}
++
++#endif
++
++/**
++ * __ccs_free_task_security - Release memory associated with "struct task_struct".
++ *
++ * @task: Pointer to "struct task_struct".
++ *
++ * Returns nothing.
++ */
++static void __ccs_free_task_security(const struct task_struct *task)
++{
++ unsigned long flags;
++ struct ccs_security *ptr = ccs_find_task_security(task);
++ if (ptr == &ccs_default_security || ptr == &ccs_oom_security)
++ return;
++ spin_lock_irqsave(&ccs_task_security_list_lock, flags);
++ list_del_rcu(&ptr->list);
++ spin_unlock_irqrestore(&ccs_task_security_list_lock, flags);
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 8)
++ call_rcu(&ptr->rcu, ccs_rcu_free);
++#else
++ call_rcu(&ptr->rcu, ccs_rcu_free, ptr);
++#endif
++}
++
++#endif
++
++/**
++ * ccs_mm_init - Initialize mm related code.
++ *
++ * Returns nothing.
++ */
++void __init ccs_mm_init(void)
++{
++ int idx;
++ for (idx = 0; idx < CCS_MAX_HASH; idx++)
++ INIT_LIST_HEAD(&ccs_name_list[idx]);
++#ifdef CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY
++ for (idx = 0; idx < CCS_MAX_TASK_SECURITY_HASH; idx++)
++ INIT_LIST_HEAD(&ccs_task_security_list[idx]);
++#endif
++ smp_wmb(); /* Avoid out of order execution. */
++#ifdef CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY
++ ccsecurity_ops.alloc_task_security = __ccs_alloc_task_security;
++ ccsecurity_ops.free_task_security = __ccs_free_task_security;
++#endif
++ ccs_kernel_domain.domainname = ccs_get_name("<kernel>");
++ list_add_tail_rcu(&ccs_kernel_domain.list, &ccs_domain_list);
++}
+diff --git a/security/ccsecurity/permission.c b/security/ccsecurity/permission.c
+new file mode 100644
+index 0000000..d73c237
+--- /dev/null
++++ b/security/ccsecurity/permission.c
+@@ -0,0 +1,5025 @@
++/*
++ * security/ccsecurity/permission.c
++ *
++ * Copyright (C) 2005-2012 NTT DATA CORPORATION
++ *
++ * Version: 1.8.4 2015/05/05
++ */
++
++#include "internal.h"
++
++/***** SECTION1: Constants definition *****/
++
++#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 32)
++
++/*
++ * may_open() receives open flags modified by open_to_namei_flags() until
++ * 2.6.32. We stop here in case some distributions backported ACC_MODE changes,
++ * for we can't determine whether may_open() receives open flags modified by
++ * open_to_namei_flags() or not.
++ */
++#ifdef ACC_MODE
++#error ACC_MODE already defined.
++#endif
++#define ACC_MODE(x) ("\000\004\002\006"[(x)&O_ACCMODE])
++
++#if defined(RHEL_MAJOR) && RHEL_MAJOR == 6
++/* RHEL6 passes unmodified flags since 2.6.32-71.14.1.el6 . */
++#undef ACC_MODE
++#define ACC_MODE(x) ("\004\002\006"[(x)&O_ACCMODE])
++#endif
++
++#endif
++
++/* String table for special mount operations. */
++static const char * const ccs_mounts[CCS_MAX_SPECIAL_MOUNT] = {
++ [CCS_MOUNT_BIND] = "--bind",
++ [CCS_MOUNT_MOVE] = "--move",
++ [CCS_MOUNT_REMOUNT] = "--remount",
++ [CCS_MOUNT_MAKE_UNBINDABLE] = "--make-unbindable",
++ [CCS_MOUNT_MAKE_PRIVATE] = "--make-private",
++ [CCS_MOUNT_MAKE_SLAVE] = "--make-slave",
++ [CCS_MOUNT_MAKE_SHARED] = "--make-shared",
++};
++
++/* Mapping table from "enum ccs_path_acl_index" to "enum ccs_mac_index". */
++static const u8 ccs_p2mac[CCS_MAX_PATH_OPERATION] = {
++ [CCS_TYPE_EXECUTE] = CCS_MAC_FILE_EXECUTE,
++ [CCS_TYPE_READ] = CCS_MAC_FILE_OPEN,
++ [CCS_TYPE_WRITE] = CCS_MAC_FILE_OPEN,
++ [CCS_TYPE_APPEND] = CCS_MAC_FILE_OPEN,
++ [CCS_TYPE_UNLINK] = CCS_MAC_FILE_UNLINK,
++#ifdef CONFIG_CCSECURITY_FILE_GETATTR
++ [CCS_TYPE_GETATTR] = CCS_MAC_FILE_GETATTR,
++#endif
++ [CCS_TYPE_RMDIR] = CCS_MAC_FILE_RMDIR,
++ [CCS_TYPE_TRUNCATE] = CCS_MAC_FILE_TRUNCATE,
++ [CCS_TYPE_SYMLINK] = CCS_MAC_FILE_SYMLINK,
++ [CCS_TYPE_CHROOT] = CCS_MAC_FILE_CHROOT,
++ [CCS_TYPE_UMOUNT] = CCS_MAC_FILE_UMOUNT,
++};
++
++/* Mapping table from "enum ccs_mkdev_acl_index" to "enum ccs_mac_index". */
++const u8 ccs_pnnn2mac[CCS_MAX_MKDEV_OPERATION] = {
++ [CCS_TYPE_MKBLOCK] = CCS_MAC_FILE_MKBLOCK,
++ [CCS_TYPE_MKCHAR] = CCS_MAC_FILE_MKCHAR,
++};
++
++/* Mapping table from "enum ccs_path2_acl_index" to "enum ccs_mac_index". */
++const u8 ccs_pp2mac[CCS_MAX_PATH2_OPERATION] = {
++ [CCS_TYPE_LINK] = CCS_MAC_FILE_LINK,
++ [CCS_TYPE_RENAME] = CCS_MAC_FILE_RENAME,
++ [CCS_TYPE_PIVOT_ROOT] = CCS_MAC_FILE_PIVOT_ROOT,
++};
++
++/*
++ * Mapping table from "enum ccs_path_number_acl_index" to "enum ccs_mac_index".
++ */
++const u8 ccs_pn2mac[CCS_MAX_PATH_NUMBER_OPERATION] = {
++ [CCS_TYPE_CREATE] = CCS_MAC_FILE_CREATE,
++ [CCS_TYPE_MKDIR] = CCS_MAC_FILE_MKDIR,
++ [CCS_TYPE_MKFIFO] = CCS_MAC_FILE_MKFIFO,
++ [CCS_TYPE_MKSOCK] = CCS_MAC_FILE_MKSOCK,
++ [CCS_TYPE_IOCTL] = CCS_MAC_FILE_IOCTL,
++ [CCS_TYPE_CHMOD] = CCS_MAC_FILE_CHMOD,
++ [CCS_TYPE_CHOWN] = CCS_MAC_FILE_CHOWN,
++ [CCS_TYPE_CHGRP] = CCS_MAC_FILE_CHGRP,
++};
++
++#ifdef CONFIG_CCSECURITY_NETWORK
++
++/*
++ * Mapping table from "enum ccs_network_acl_index" to "enum ccs_mac_index" for
++ * inet domain socket.
++ */
++static const u8 ccs_inet2mac[CCS_SOCK_MAX][CCS_MAX_NETWORK_OPERATION] = {
++ [SOCK_STREAM] = {
++ [CCS_NETWORK_BIND] = CCS_MAC_NETWORK_INET_STREAM_BIND,
++ [CCS_NETWORK_LISTEN] = CCS_MAC_NETWORK_INET_STREAM_LISTEN,
++ [CCS_NETWORK_CONNECT] = CCS_MAC_NETWORK_INET_STREAM_CONNECT,
++ [CCS_NETWORK_ACCEPT] = CCS_MAC_NETWORK_INET_STREAM_ACCEPT,
++ },
++ [SOCK_DGRAM] = {
++ [CCS_NETWORK_BIND] = CCS_MAC_NETWORK_INET_DGRAM_BIND,
++ [CCS_NETWORK_SEND] = CCS_MAC_NETWORK_INET_DGRAM_SEND,
++#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
++ [CCS_NETWORK_RECV] = CCS_MAC_NETWORK_INET_DGRAM_RECV,
++#endif
++ },
++ [SOCK_RAW] = {
++ [CCS_NETWORK_BIND] = CCS_MAC_NETWORK_INET_RAW_BIND,
++ [CCS_NETWORK_SEND] = CCS_MAC_NETWORK_INET_RAW_SEND,
++#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
++ [CCS_NETWORK_RECV] = CCS_MAC_NETWORK_INET_RAW_RECV,
++#endif
++ },
++};
++
++/*
++ * Mapping table from "enum ccs_network_acl_index" to "enum ccs_mac_index" for
++ * unix domain socket.
++ */
++static const u8 ccs_unix2mac[CCS_SOCK_MAX][CCS_MAX_NETWORK_OPERATION] = {
++ [SOCK_STREAM] = {
++ [CCS_NETWORK_BIND] = CCS_MAC_NETWORK_UNIX_STREAM_BIND,
++ [CCS_NETWORK_LISTEN] = CCS_MAC_NETWORK_UNIX_STREAM_LISTEN,
++ [CCS_NETWORK_CONNECT] = CCS_MAC_NETWORK_UNIX_STREAM_CONNECT,
++ [CCS_NETWORK_ACCEPT] = CCS_MAC_NETWORK_UNIX_STREAM_ACCEPT,
++ },
++ [SOCK_DGRAM] = {
++ [CCS_NETWORK_BIND] = CCS_MAC_NETWORK_UNIX_DGRAM_BIND,
++ [CCS_NETWORK_SEND] = CCS_MAC_NETWORK_UNIX_DGRAM_SEND,
++#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
++ [CCS_NETWORK_RECV] = CCS_MAC_NETWORK_UNIX_DGRAM_RECV,
++#endif
++ },
++ [SOCK_SEQPACKET] = {
++ [CCS_NETWORK_BIND] = CCS_MAC_NETWORK_UNIX_SEQPACKET_BIND,
++ [CCS_NETWORK_LISTEN] = CCS_MAC_NETWORK_UNIX_SEQPACKET_LISTEN,
++ [CCS_NETWORK_CONNECT] = CCS_MAC_NETWORK_UNIX_SEQPACKET_CONNECT,
++ [CCS_NETWORK_ACCEPT] = CCS_MAC_NETWORK_UNIX_SEQPACKET_ACCEPT,
++ },
++};
++
++#endif
++
++#ifdef CONFIG_CCSECURITY_CAPABILITY
++
++/*
++ * Mapping table from "enum ccs_capability_acl_index" to "enum ccs_mac_index".
++ */
++const u8 ccs_c2mac[CCS_MAX_CAPABILITY_INDEX] = {
++ [CCS_USE_ROUTE_SOCKET] = CCS_MAC_CAPABILITY_USE_ROUTE_SOCKET,
++ [CCS_USE_PACKET_SOCKET] = CCS_MAC_CAPABILITY_USE_PACKET_SOCKET,
++ [CCS_SYS_REBOOT] = CCS_MAC_CAPABILITY_SYS_REBOOT,
++ [CCS_SYS_VHANGUP] = CCS_MAC_CAPABILITY_SYS_VHANGUP,
++ [CCS_SYS_SETTIME] = CCS_MAC_CAPABILITY_SYS_SETTIME,
++ [CCS_SYS_NICE] = CCS_MAC_CAPABILITY_SYS_NICE,
++ [CCS_SYS_SETHOSTNAME] = CCS_MAC_CAPABILITY_SYS_SETHOSTNAME,
++ [CCS_USE_KERNEL_MODULE] = CCS_MAC_CAPABILITY_USE_KERNEL_MODULE,
++ [CCS_SYS_KEXEC_LOAD] = CCS_MAC_CAPABILITY_SYS_KEXEC_LOAD,
++ [CCS_SYS_PTRACE] = CCS_MAC_CAPABILITY_SYS_PTRACE,
++};
++
++#endif
++
++/***** SECTION2: Structure definition *****/
++
++/* Structure for holding inet domain socket's address. */
++struct ccs_inet_addr_info {
++ u16 port; /* In network byte order. */
++ const u32 *address; /* In network byte order. */
++ bool is_ipv6;
++};
++
++/* Structure for holding unix domain socket's address. */
++struct ccs_unix_addr_info {
++ u8 *addr; /* This may not be '\0' terminated string. */
++ unsigned int addr_len;
++};
++
++/* Structure for holding socket address. */
++struct ccs_addr_info {
++ u8 protocol;
++ u8 operation;
++ struct ccs_inet_addr_info inet;
++ struct ccs_unix_addr_info unix0;
++};
++
++/***** SECTION3: Prototype definition section *****/
++
++bool ccs_dump_page(struct linux_binprm *bprm, unsigned long pos,
++ struct ccs_page_dump *dump);
++void ccs_get_attributes(struct ccs_obj_info *obj);
++
++static bool ccs_alphabet_char(const char c);
++static bool ccs_argv(const unsigned int index, const char *arg_ptr,
++ const int argc, const struct ccs_argv *argv, u8 *checked);
++static bool ccs_byte_range(const char *str);
++static bool ccs_check_entry(struct ccs_request_info *r,
++ struct ccs_acl_info *ptr);
++static bool ccs_check_mkdev_acl(struct ccs_request_info *r,
++ const struct ccs_acl_info *ptr);
++static bool ccs_check_mount_acl(struct ccs_request_info *r,
++ const struct ccs_acl_info *ptr);
++static bool ccs_check_path2_acl(struct ccs_request_info *r,
++ const struct ccs_acl_info *ptr);
++static bool ccs_check_path_acl(struct ccs_request_info *r,
++ const struct ccs_acl_info *ptr);
++static bool ccs_check_path_number_acl(struct ccs_request_info *r,
++ const struct ccs_acl_info *ptr);
++static bool ccs_compare_number_union(const unsigned long value,
++ const struct ccs_number_union *ptr);
++static bool ccs_condition(struct ccs_request_info *r,
++ const struct ccs_condition *cond);
++static bool ccs_decimal(const char c);
++static bool ccs_envp(const char *env_name, const char *env_value,
++ const int envc, const struct ccs_envp *envp, u8 *checked);
++static bool ccs_file_matches_pattern(const char *filename,
++ const char *filename_end,
++ const char *pattern,
++ const char *pattern_end);
++static bool ccs_file_matches_pattern2(const char *filename,
++ const char *filename_end,
++ const char *pattern,
++ const char *pattern_end);
++static bool ccs_get_realpath(struct ccs_path_info *buf, struct path *path);
++static bool ccs_hexadecimal(const char c);
++static bool ccs_number_matches_group(const unsigned long min,
++ const unsigned long max,
++ const struct ccs_group *group);
++static bool ccs_path_matches_pattern(const struct ccs_path_info *filename,
++ const struct ccs_path_info *pattern);
++static bool ccs_path_matches_pattern2(const char *f, const char *p);
++static bool ccs_scan_bprm(struct ccs_execve *ee, const u16 argc,
++ const struct ccs_argv *argv, const u16 envc,
++ const struct ccs_envp *envp);
++static bool ccs_scan_exec_realpath(struct file *file,
++ const struct ccs_name_union *ptr,
++ const bool match);
++static bool ccs_scan_transition(const struct list_head *list,
++ const struct ccs_path_info *domainname,
++ const struct ccs_path_info *program,
++ const char *last_name,
++ const enum ccs_transition_type type);
++static const char *ccs_last_word(const char *name);
++static const struct ccs_path_info *ccs_compare_name_union
++(const struct ccs_path_info *name, const struct ccs_name_union *ptr);
++static const struct ccs_path_info *ccs_path_matches_group
++(const struct ccs_path_info *pathname, const struct ccs_group *group);
++static enum ccs_transition_type ccs_transition_type
++(const struct ccs_policy_namespace *ns, const struct ccs_path_info *domainname,
++ const struct ccs_path_info *program);
++static int __ccs_chmod_permission(struct dentry *dentry,
++ struct vfsmount *vfsmnt, mode_t mode);
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0)
++static int __ccs_chown_permission(struct dentry *dentry,
++ struct vfsmount *vfsmnt, kuid_t user,
++ kgid_t group);
++#else
++static int __ccs_chown_permission(struct dentry *dentry,
++ struct vfsmount *vfsmnt, uid_t user,
++ gid_t group);
++#endif
++static int __ccs_chroot_permission(struct path *path);
++static int __ccs_fcntl_permission(struct file *file, unsigned int cmd,
++ unsigned long arg);
++static int __ccs_ioctl_permission(struct file *filp, unsigned int cmd,
++ unsigned long arg);
++static int __ccs_link_permission(struct dentry *old_dentry,
++ struct dentry *new_dentry,
++ struct vfsmount *mnt);
++static int __ccs_mkdir_permission(struct dentry *dentry, struct vfsmount *mnt,
++ unsigned int mode);
++static int __ccs_mknod_permission(struct dentry *dentry, struct vfsmount *mnt,
++ const unsigned int mode, unsigned int dev);
++static int __ccs_mount_permission(const char *dev_name, struct path *path,
++ const char *type, unsigned long flags,
++ void *data_page);
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30)
++static int __ccs_open_exec_permission(struct dentry *dentry,
++ struct vfsmount *mnt);
++#endif
++static int __ccs_open_permission(struct dentry *dentry, struct vfsmount *mnt,
++ const int flag);
++#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 18) || (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33) && defined(CONFIG_SYSCTL_SYSCALL))
++static int __ccs_parse_table(int __user *name, int nlen, void __user *oldval,
++ void __user *newval, struct ctl_table *table);
++#endif
++static int __ccs_pivot_root_permission(struct path *old_path,
++ struct path *new_path);
++static int __ccs_rename_permission(struct dentry *old_dentry,
++ struct dentry *new_dentry,
++ struct vfsmount *mnt);
++static int __ccs_rmdir_permission(struct dentry *dentry, struct vfsmount *mnt);
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 8, 0)
++static int __ccs_search_binary_handler(struct linux_binprm *bprm);
++#else
++static int __ccs_search_binary_handler(struct linux_binprm *bprm,
++ struct pt_regs *regs);
++#endif
++static int __ccs_symlink_permission(struct dentry *dentry,
++ struct vfsmount *mnt, const char *from);
++static int __ccs_truncate_permission(struct dentry *dentry,
++ struct vfsmount *mnt);
++static int __ccs_umount_permission(struct vfsmount *mnt, int flags);
++static int __ccs_unlink_permission(struct dentry *dentry,
++ struct vfsmount *mnt);
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30)
++static int __ccs_uselib_permission(struct dentry *dentry,
++ struct vfsmount *mnt);
++#endif
++static int ccs_execute_permission(struct ccs_request_info *r,
++ const struct ccs_path_info *filename);
++static int ccs_find_next_domain(struct ccs_execve *ee);
++static int ccs_get_path(const char *pathname, struct path *path);
++static int ccs_kern_path(const char *pathname, int flags, struct path *path);
++static int ccs_mkdev_perm(const u8 operation, struct dentry *dentry,
++ struct vfsmount *mnt, const unsigned int mode,
++ unsigned int dev);
++static int ccs_mount_acl(struct ccs_request_info *r, const char *dev_name,
++ struct path *dir, const char *type,
++ unsigned long flags);
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 33)
++static int ccs_new_open_permission(struct file *filp);
++#endif
++#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 24)
++static int ccs_old_chroot_permission(struct nameidata *nd);
++static int ccs_old_mount_permission(const char *dev_name, struct nameidata *nd,
++ const char *type, unsigned long flags,
++ void *data_page);
++static int ccs_old_pivot_root_permission(struct nameidata *old_nd,
++ struct nameidata *new_nd);
++#endif
++static int ccs_path2_perm(const u8 operation, struct dentry *dentry1,
++ struct vfsmount *mnt1, struct dentry *dentry2,
++ struct vfsmount *mnt2);
++static int ccs_path_number_perm(const u8 type, struct dentry *dentry,
++ struct vfsmount *vfsmnt, unsigned long number);
++static int ccs_path_perm(const u8 operation, struct dentry *dentry,
++ struct vfsmount *mnt, const char *target);
++static int ccs_path_permission(struct ccs_request_info *r, u8 operation,
++ const struct ccs_path_info *filename);
++static int ccs_start_execve(struct linux_binprm *bprm,
++ struct ccs_execve **eep);
++static int ccs_symlink_path(const char *pathname, struct ccs_path_info *name);
++#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 32)
++static void __ccs_clear_open_mode(void);
++static void __ccs_save_open_mode(int mode);
++#endif
++static void ccs_add_slash(struct ccs_path_info *buf);
++static void ccs_finish_execve(int retval, struct ccs_execve *ee);
++
++#ifdef CONFIG_CCSECURITY_MISC
++static bool ccs_check_env_acl(struct ccs_request_info *r,
++ const struct ccs_acl_info *ptr);
++static int ccs_env_perm(struct ccs_request_info *r, const char *env);
++static int ccs_environ(struct ccs_execve *ee);
++#endif
++
++#ifdef CONFIG_CCSECURITY_CAPABILITY
++static bool __ccs_capable(const u8 operation);
++static bool ccs_check_capability_acl(struct ccs_request_info *r,
++ const struct ccs_acl_info *ptr);
++static bool ccs_kernel_service(void);
++static int __ccs_ptrace_permission(long request, long pid);
++static int __ccs_socket_create_permission(int family, int type, int protocol);
++#endif
++
++#ifdef CONFIG_CCSECURITY_NETWORK
++static bool ccs_address_matches_group(const bool is_ipv6, const u32 *address,
++ const struct ccs_group *group);
++static bool ccs_check_inet_acl(struct ccs_request_info *r,
++ const struct ccs_acl_info *ptr);
++static bool ccs_check_unix_acl(struct ccs_request_info *r,
++ const struct ccs_acl_info *ptr);
++static bool ccs_kernel_service(void);
++static int __ccs_socket_bind_permission(struct socket *sock,
++ struct sockaddr *addr, int addr_len);
++static int __ccs_socket_connect_permission(struct socket *sock,
++ struct sockaddr *addr,
++ int addr_len);
++static int __ccs_socket_listen_permission(struct socket *sock);
++static int __ccs_socket_post_accept_permission(struct socket *sock,
++ struct socket *newsock);
++static int __ccs_socket_sendmsg_permission(struct socket *sock,
++ struct msghdr *msg, int size);
++static int ccs_check_inet_address(const struct sockaddr *addr,
++ const unsigned int addr_len, const u16 port,
++ struct ccs_addr_info *address);
++static int ccs_check_unix_address(struct sockaddr *addr,
++ const unsigned int addr_len,
++ struct ccs_addr_info *address);
++static int ccs_inet_entry(const struct ccs_addr_info *address);
++static int ccs_unix_entry(const struct ccs_addr_info *address);
++static u8 ccs_sock_family(struct sock *sk);
++#endif
++
++#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
++static int __ccs_socket_post_recvmsg_permission(struct sock *sk,
++ struct sk_buff *skb,
++ int flags);
++#endif
++
++#ifdef CONFIG_CCSECURITY_IPC
++static bool ccs_check_signal_acl(struct ccs_request_info *r,
++ const struct ccs_acl_info *ptr);
++static int ccs_signal_acl(const int pid, const int sig);
++static int ccs_signal_acl0(pid_t tgid, pid_t pid, int sig);
++static int ccs_signal_acl2(const int sig, const int pid);
++#endif
++
++#ifdef CONFIG_CCSECURITY_FILE_GETATTR
++static int __ccs_getattr_permission(struct vfsmount *mnt,
++ struct dentry *dentry);
++#endif
++
++#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
++static bool ccs_find_execute_handler(struct ccs_execve *ee, const u8 type);
++static int ccs_try_alt_exec(struct ccs_execve *ee);
++static void ccs_unescape(unsigned char *dest);
++#endif
++
++#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
++static bool ccs_check_task_acl(struct ccs_request_info *r,
++ const struct ccs_acl_info *ptr);
++#endif
++
++/***** SECTION4: Standalone functions section *****/
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36)
++
++/**
++ * ccs_copy_argv - Wrapper for copy_strings_kernel().
++ *
++ * @arg: String to copy.
++ * @bprm: Pointer to "struct linux_binprm".
++ *
++ * Returns return value of copy_strings_kernel().
++ */
++static inline int ccs_copy_argv(const char *arg, struct linux_binprm *bprm)
++{
++ const int ret = copy_strings_kernel(1, &arg, bprm);
++ if (ret >= 0)
++ bprm->argc++;
++ return ret;
++}
++
++#else
++
++/**
++ * ccs_copy_argv - Wrapper for copy_strings_kernel().
++ *
++ * @arg: String to copy.
++ * @bprm: Pointer to "struct linux_binprm".
++ *
++ * Returns return value of copy_strings_kernel().
++ */
++static inline int ccs_copy_argv(char *arg, struct linux_binprm *bprm)
++{
++ const int ret = copy_strings_kernel(1, &arg, bprm);
++ if (ret >= 0)
++ bprm->argc++;
++ return ret;
++}
++
++#endif
++
++#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 35)
++
++/**
++ * get_fs_root - Get reference on root directory.
++ *
++ * @fs: Pointer to "struct fs_struct".
++ * @root: Pointer to "struct path".
++ *
++ * Returns nothing.
++ *
++ * This is for compatibility with older kernels.
++ */
++static inline void get_fs_root(struct fs_struct *fs, struct path *root)
++{
++ read_lock(&fs->lock);
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
++ *root = fs->root;
++ path_get(root);
++#else
++ root->dentry = dget(fs->root);
++ root->mnt = mntget(fs->rootmnt);
++#endif
++ read_unlock(&fs->lock);
++}
++
++#endif
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
++
++/**
++ * module_put - Put a reference on module.
++ *
++ * @module: Pointer to "struct module". Maybe NULL.
++ *
++ * Returns nothing.
++ *
++ * This is for compatibility with older kernels.
++ */
++static inline void module_put(struct module *module)
++{
++ if (module)
++ __MOD_DEC_USE_COUNT(module);
++}
++
++#endif
++
++/**
++ * ccs_put_filesystem - Wrapper for put_filesystem().
++ *
++ * @fstype: Pointer to "struct file_system_type".
++ *
++ * Returns nothing.
++ *
++ * Since put_filesystem() is not exported, I embed put_filesystem() here.
++ */
++static inline void ccs_put_filesystem(struct file_system_type *fstype)
++{
++ module_put(fstype->owner);
++}
++
++#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 22)
++#if !defined(RHEL_MAJOR) || RHEL_MAJOR != 5
++#if !defined(AX_MAJOR) || AX_MAJOR != 3
++
++/**
++ * ip_hdr - Get "struct iphdr".
++ *
++ * @skb: Pointer to "struct sk_buff".
++ *
++ * Returns pointer to "struct iphdr".
++ *
++ * This is for compatibility with older kernels.
++ */
++static inline struct iphdr *ip_hdr(const struct sk_buff *skb)
++{
++ return skb->nh.iph;
++}
++
++/**
++ * udp_hdr - Get "struct udphdr".
++ *
++ * @skb: Pointer to "struct sk_buff".
++ *
++ * Returns pointer to "struct udphdr".
++ *
++ * This is for compatibility with older kernels.
++ */
++static inline struct udphdr *udp_hdr(const struct sk_buff *skb)
++{
++ return skb->h.uh;
++}
++
++/**
++ * ipv6_hdr - Get "struct ipv6hdr".
++ *
++ * @skb: Pointer to "struct sk_buff".
++ *
++ * Returns pointer to "struct ipv6hdr".
++ *
++ * This is for compatibility with older kernels.
++ */
++static inline struct ipv6hdr *ipv6_hdr(const struct sk_buff *skb)
++{
++ return skb->nh.ipv6h;
++}
++
++#endif
++#endif
++#endif
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
++
++/**
++ * skb_kill_datagram - Kill a datagram forcibly.
++ *
++ * @sk: Pointer to "struct sock".
++ * @skb: Pointer to "struct sk_buff".
++ * @flags: Flags passed to skb_recv_datagram().
++ *
++ * Returns nothing.
++ */
++static inline void skb_kill_datagram(struct sock *sk, struct sk_buff *skb,
++ int flags)
++{
++ /* Clear queue. */
++ if (flags & MSG_PEEK) {
++ int clear = 0;
++ spin_lock_irq(&sk->receive_queue.lock);
++ if (skb == skb_peek(&sk->receive_queue)) {
++ __skb_unlink(skb, &sk->receive_queue);
++ clear = 1;
++ }
++ spin_unlock_irq(&sk->receive_queue.lock);
++ if (clear)
++ kfree_skb(skb);
++ }
++ skb_free_datagram(sk, skb);
++}
++
++#elif LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 16)
++
++/**
++ * skb_kill_datagram - Kill a datagram forcibly.
++ *
++ * @sk: Pointer to "struct sock".
++ * @skb: Pointer to "struct sk_buff".
++ * @flags: Flags passed to skb_recv_datagram().
++ *
++ * Returns nothing.
++ */
++static inline void skb_kill_datagram(struct sock *sk, struct sk_buff *skb,
++ int flags)
++{
++ /* Clear queue. */
++ if (flags & MSG_PEEK) {
++ int clear = 0;
++ spin_lock_bh(&sk->sk_receive_queue.lock);
++ if (skb == skb_peek(&sk->sk_receive_queue)) {
++ __skb_unlink(skb, &sk->sk_receive_queue);
++ clear = 1;
++ }
++ spin_unlock_bh(&sk->sk_receive_queue.lock);
++ if (clear)
++ kfree_skb(skb);
++ }
++ skb_free_datagram(sk, skb);
++}
++
++#endif
++
++#endif
++
++/***** SECTION5: Variables definition section *****/
++
++/* The initial domain. */
++struct ccs_domain_info ccs_kernel_domain;
++
++/* The list for "struct ccs_domain_info". */
++LIST_HEAD(ccs_domain_list);
++
++/***** SECTION6: Dependent functions section *****/
++
++/**
++ * ccs_path_matches_group - Check whether the given pathname matches members of the given pathname group.
++ *
++ * @pathname: The name of pathname.
++ * @group: Pointer to "struct ccs_path_group".
++ *
++ * Returns matched member's pathname if @pathname matches pathnames in @group,
++ * NULL otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static const struct ccs_path_info *ccs_path_matches_group
++(const struct ccs_path_info *pathname, const struct ccs_group *group)
++{
++ struct ccs_path_group *member;
++ list_for_each_entry_srcu(member, &group->member_list, head.list,
++ &ccs_ss) {
++ if (member->head.is_deleted)
++ continue;
++ if (!ccs_path_matches_pattern(pathname, member->member_name))
++ continue;
++ return member->member_name;
++ }
++ return NULL;
++}
++
++/**
++ * ccs_number_matches_group - Check whether the given number matches members of the given number group.
++ *
++ * @min: Min number.
++ * @max: Max number.
++ * @group: Pointer to "struct ccs_number_group".
++ *
++ * Returns true if @min and @max partially overlaps @group, false otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static bool ccs_number_matches_group(const unsigned long min,
++ const unsigned long max,
++ const struct ccs_group *group)
++{
++ struct ccs_number_group *member;
++ bool matched = false;
++ list_for_each_entry_srcu(member, &group->member_list, head.list,
++ &ccs_ss) {
++ if (member->head.is_deleted)
++ continue;
++ if (min > member->number.values[1] ||
++ max < member->number.values[0])
++ continue;
++ matched = true;
++ break;
++ }
++ return matched;
++}
++
++/**
++ * ccs_check_entry - Do permission check.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ * @ptr: Pointer to "struct ccs_acl_info".
++ *
++ * Returns true on match, false otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static bool ccs_check_entry(struct ccs_request_info *r,
++ struct ccs_acl_info *ptr)
++{
++ if (ptr->is_deleted || ptr->type != r->param_type)
++ return false;
++ switch (r->param_type) {
++ case CCS_TYPE_PATH_ACL:
++ return ccs_check_path_acl(r, ptr);
++ case CCS_TYPE_PATH2_ACL:
++ return ccs_check_path2_acl(r, ptr);
++ case CCS_TYPE_PATH_NUMBER_ACL:
++ return ccs_check_path_number_acl(r, ptr);
++ case CCS_TYPE_MKDEV_ACL:
++ return ccs_check_mkdev_acl(r, ptr);
++ case CCS_TYPE_MOUNT_ACL:
++ return ccs_check_mount_acl(r, ptr);
++#ifdef CONFIG_CCSECURITY_MISC
++ case CCS_TYPE_ENV_ACL:
++ return ccs_check_env_acl(r, ptr);
++#endif
++#ifdef CONFIG_CCSECURITY_CAPABILITY
++ case CCS_TYPE_CAPABILITY_ACL:
++ return ccs_check_capability_acl(r, ptr);
++#endif
++#ifdef CONFIG_CCSECURITY_NETWORK
++ case CCS_TYPE_INET_ACL:
++ return ccs_check_inet_acl(r, ptr);
++ case CCS_TYPE_UNIX_ACL:
++ return ccs_check_unix_acl(r, ptr);
++#endif
++#ifdef CONFIG_CCSECURITY_IPC
++ case CCS_TYPE_SIGNAL_ACL:
++ return ccs_check_signal_acl(r, ptr);
++#endif
++#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
++ case CCS_TYPE_MANUAL_TASK_ACL:
++ return ccs_check_task_acl(r, ptr);
++#endif
++ }
++ return true;
++}
++
++/**
++ * ccs_check_acl - Do permission check.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ *
++ * Returns 0 on success, negative value otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++int ccs_check_acl(struct ccs_request_info *r)
++{
++ const struct ccs_domain_info *domain = ccs_current_domain();
++ int error;
++ do {
++ struct ccs_acl_info *ptr;
++ const struct list_head *list = &domain->acl_info_list;
++ u16 i = 0;
++retry:
++ list_for_each_entry_srcu(ptr, list, list, &ccs_ss) {
++ if (!ccs_check_entry(r, ptr))
++ continue;
++ if (!ccs_condition(r, ptr->cond))
++ continue;
++ r->matched_acl = ptr;
++ r->granted = true;
++ ccs_audit_log(r);
++ return 0;
++ }
++ for (; i < CCS_MAX_ACL_GROUPS; i++) {
++ if (!test_bit(i, domain->group))
++ continue;
++ list = &domain->ns->acl_group[i++];
++ goto retry;
++ }
++ r->granted = false;
++ error = ccs_audit_log(r);
++ } while (error == CCS_RETRY_REQUEST &&
++ r->type != CCS_MAC_FILE_EXECUTE);
++ return error;
++}
++
++/**
++ * ccs_last_word - Get last component of a domainname.
++ *
++ * @name: Domainname to check.
++ *
++ * Returns the last word of @name.
++ */
++static const char *ccs_last_word(const char *name)
++{
++ const char *cp = strrchr(name, ' ');
++ if (cp)
++ return cp + 1;
++ return name;
++}
++
++/**
++ * ccs_scan_transition - Try to find specific domain transition type.
++ *
++ * @list: Pointer to "struct list_head".
++ * @domainname: The name of current domain.
++ * @program: The name of requested program.
++ * @last_name: The last component of @domainname.
++ * @type: One of values in "enum ccs_transition_type".
++ *
++ * Returns true if found one, false otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static bool ccs_scan_transition(const struct list_head *list,
++ const struct ccs_path_info *domainname,
++ const struct ccs_path_info *program,
++ const char *last_name,
++ const enum ccs_transition_type type)
++{
++ const struct ccs_transition_control *ptr;
++ list_for_each_entry_srcu(ptr, list, head.list, &ccs_ss) {
++ if (ptr->head.is_deleted || ptr->type != type)
++ continue;
++ if (ptr->domainname) {
++ if (!ptr->is_last_name) {
++ if (ptr->domainname != domainname)
++ continue;
++ } else {
++ /*
++ * Use direct strcmp() since this is
++ * unlikely used.
++ */
++ if (strcmp(ptr->domainname->name, last_name))
++ continue;
++ }
++ }
++ if (ptr->program && ccs_pathcmp(ptr->program, program))
++ continue;
++ return true;
++ }
++ return false;
++}
++
++/**
++ * ccs_transition_type - Get domain transition type.
++ *
++ * @ns: Pointer to "struct ccs_policy_namespace".
++ * @domainname: The name of current domain.
++ * @program: The name of requested program.
++ *
++ * Returns CCS_TRANSITION_CONTROL_TRANSIT if executing @program causes domain
++ * transition across namespaces, CCS_TRANSITION_CONTROL_INITIALIZE if executing
++ * @program reinitializes domain transition within that namespace,
++ * CCS_TRANSITION_CONTROL_KEEP if executing @program stays at @domainname ,
++ * others otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static enum ccs_transition_type ccs_transition_type
++(const struct ccs_policy_namespace *ns, const struct ccs_path_info *domainname,
++ const struct ccs_path_info *program)
++{
++ const char *last_name = ccs_last_word(domainname->name);
++ enum ccs_transition_type type = CCS_TRANSITION_CONTROL_NO_RESET;
++ while (type < CCS_MAX_TRANSITION_TYPE) {
++ const struct list_head * const list =
++ &ns->policy_list[CCS_ID_TRANSITION_CONTROL];
++ if (!ccs_scan_transition(list, domainname, program, last_name,
++ type)) {
++ type++;
++ continue;
++ }
++ if (type != CCS_TRANSITION_CONTROL_NO_RESET &&
++ type != CCS_TRANSITION_CONTROL_NO_INITIALIZE)
++ break;
++ /*
++ * Do not check for reset_domain if no_reset_domain matched.
++ * Do not check for initialize_domain if no_initialize_domain
++ * matched.
++ */
++ type++;
++ type++;
++ }
++ return type;
++}
++
++/**
++ * ccs_find_next_domain - Find a domain.
++ *
++ * @ee: Pointer to "struct ccs_execve".
++ *
++ * Returns 0 on success, negative value otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static int ccs_find_next_domain(struct ccs_execve *ee)
++{
++ struct ccs_request_info *r = &ee->r;
++#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
++ const struct ccs_path_info *handler = ee->handler;
++#endif
++ struct ccs_domain_info *domain = NULL;
++ struct ccs_domain_info * const old_domain = ccs_current_domain();
++ struct linux_binprm *bprm = ee->bprm;
++ struct ccs_security *task = ccs_current_security();
++ const struct ccs_path_info *candidate;
++ struct ccs_path_info exename;
++ int retval;
++ bool reject_on_transition_failure = false;
++
++ /* Get symlink's pathname of program. */
++ retval = ccs_symlink_path(bprm->filename, &exename);
++ if (retval < 0)
++ return retval;
++
++#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
++ if (handler) {
++ /* No permission check for execute handler. */
++ candidate = &exename;
++ if (ccs_pathcmp(candidate, handler)) {
++ /* Failed to verify execute handler. */
++ static u8 counter = 20;
++ if (counter) {
++ counter--;
++ printk(KERN_WARNING "Failed to verify: %s\n",
++ handler->name);
++ }
++ goto out;
++ }
++ } else
++#endif
++ {
++ struct ccs_aggregator *ptr;
++ struct list_head *list;
++retry:
++ /* Check 'aggregator' directive. */
++ candidate = &exename;
++ list = &old_domain->ns->policy_list[CCS_ID_AGGREGATOR];
++ list_for_each_entry_srcu(ptr, list, head.list, &ccs_ss) {
++ if (ptr->head.is_deleted ||
++ !ccs_path_matches_pattern(candidate,
++ ptr->original_name))
++ continue;
++ candidate = ptr->aggregated_name;
++ break;
++ }
++
++ /* Check execute permission. */
++ retval = ccs_execute_permission(r, candidate);
++ if (retval == CCS_RETRY_REQUEST)
++ goto retry;
++ if (retval < 0)
++ goto out;
++ /*
++ * To be able to specify domainnames with wildcards, use the
++ * pathname specified in the policy (which may contain
++ * wildcard) rather than the pathname passed to execve()
++ * (which never contains wildcard).
++ */
++ if (r->param.path.matched_path)
++ candidate = r->param.path.matched_path;
++ }
++ /*
++ * Check for domain transition preference if "file execute" matched.
++ * If preference is given, make do_execve() fail if domain transition
++ * has failed, for domain transition preference should be used with
++ * destination domain defined.
++ */
++ if (r->ee->transition) {
++ const char *domainname = r->ee->transition->name;
++ reject_on_transition_failure = true;
++ if (!strcmp(domainname, "keep"))
++ goto force_keep_domain;
++ if (!strcmp(domainname, "child"))
++ goto force_child_domain;
++ if (!strcmp(domainname, "reset"))
++ goto force_reset_domain;
++ if (!strcmp(domainname, "initialize"))
++ goto force_initialize_domain;
++ if (!strcmp(domainname, "parent")) {
++ char *cp;
++ strncpy(ee->tmp, old_domain->domainname->name,
++ CCS_EXEC_TMPSIZE - 1);
++ cp = strrchr(ee->tmp, ' ');
++ if (cp)
++ *cp = '\0';
++ } else if (*domainname == '<')
++ strncpy(ee->tmp, domainname, CCS_EXEC_TMPSIZE - 1);
++ else
++ snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, "%s %s",
++ old_domain->domainname->name, domainname);
++ goto force_jump_domain;
++ }
++ /*
++ * No domain transition preference specified.
++ * Calculate domain to transit to.
++ */
++ switch (ccs_transition_type(old_domain->ns, old_domain->domainname,
++ candidate)) {
++ case CCS_TRANSITION_CONTROL_RESET:
++force_reset_domain:
++ /* Transit to the root of specified namespace. */
++ snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, "<%s>",
++ candidate->name);
++ /*
++ * Make do_execve() fail if domain transition across namespaces
++ * has failed.
++ */
++ reject_on_transition_failure = true;
++ break;
++ case CCS_TRANSITION_CONTROL_INITIALIZE:
++force_initialize_domain:
++ /* Transit to the child of current namespace's root. */
++ snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, "%s %s",
++ old_domain->ns->name, candidate->name);
++ break;
++ case CCS_TRANSITION_CONTROL_KEEP:
++force_keep_domain:
++ /* Keep current domain. */
++ domain = old_domain;
++ break;
++ default:
++ if (old_domain == &ccs_kernel_domain && !ccs_policy_loaded) {
++ /*
++ * Needn't to transit from kernel domain before
++ * starting /sbin/init. But transit from kernel domain
++ * if executing initializers because they might start
++ * before /sbin/init.
++ */
++ domain = old_domain;
++ break;
++ }
++force_child_domain:
++ /* Normal domain transition. */
++ snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, "%s %s",
++ old_domain->domainname->name, candidate->name);
++ break;
++ }
++force_jump_domain:
++ /*
++ * Tell GC that I started execve().
++ * Also, tell open_exec() to check read permission.
++ */
++ task->ccs_flags |= CCS_TASK_IS_IN_EXECVE;
++ /*
++ * Make task->ccs_flags visible to GC before changing
++ * task->ccs_domain_info.
++ */
++ smp_wmb();
++ /*
++ * Proceed to the next domain in order to allow reaching via PID.
++ * It will be reverted if execve() failed. Reverting is not good.
++ * But it is better than being unable to reach via PID in interactive
++ * enforcing mode.
++ */
++ if (!domain)
++ domain = ccs_assign_domain(ee->tmp, true);
++ if (domain)
++ retval = 0;
++ else if (reject_on_transition_failure) {
++ printk(KERN_WARNING
++ "ERROR: Domain '%s' not ready.\n", ee->tmp);
++ retval = -ENOMEM;
++ } else if (r->mode == CCS_CONFIG_ENFORCING)
++ retval = -ENOMEM;
++ else {
++ retval = 0;
++ if (!old_domain->flags[CCS_DIF_TRANSITION_FAILED]) {
++ old_domain->flags[CCS_DIF_TRANSITION_FAILED] = true;
++ r->granted = false;
++ ccs_write_log(r, "%s",
++ ccs_dif[CCS_DIF_TRANSITION_FAILED]);
++ printk(KERN_WARNING
++ "ERROR: Domain '%s' not defined.\n", ee->tmp);
++ }
++ }
++out:
++ kfree(exename.name);
++ return retval;
++}
++
++#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
++
++/**
++ * ccs_unescape - Unescape escaped string.
++ *
++ * @dest: String to unescape.
++ *
++ * Returns nothing.
++ */
++static void ccs_unescape(unsigned char *dest)
++{
++ unsigned char *src = dest;
++ unsigned char c;
++ unsigned char d;
++ unsigned char e;
++ while (1) {
++ c = *src++;
++ if (!c)
++ break;
++ if (c != '\\') {
++ *dest++ = c;
++ continue;
++ }
++ c = *src++;
++ if (c == '\\') {
++ *dest++ = c;
++ continue;
++ }
++ if (c < '0' || c > '3')
++ break;
++ d = *src++;
++ if (d < '0' || d > '7')
++ break;
++ e = *src++;
++ if (e < '0' || e > '7')
++ break;
++ *dest++ = ((c - '0') << 6) + ((d - '0') << 3) + (e - '0');
++ }
++ *dest = '\0';
++}
++
++/**
++ * ccs_try_alt_exec - Try to start execute handler.
++ *
++ * @ee: Pointer to "struct ccs_execve".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_try_alt_exec(struct ccs_execve *ee)
++{
++ /*
++ * Contents of modified bprm.
++ * The envp[] in original bprm is moved to argv[] so that
++ * the alternatively executed program won't be affected by
++ * some dangerous environment variables like LD_PRELOAD.
++ *
++ * modified bprm->argc
++ * = original bprm->argc + original bprm->envc + 7
++ * modified bprm->envc
++ * = 0
++ *
++ * modified bprm->argv[0]
++ * = the program's name specified by *_execute_handler
++ * modified bprm->argv[1]
++ * = ccs_current_domain()->domainname->name
++ * modified bprm->argv[2]
++ * = the current process's name
++ * modified bprm->argv[3]
++ * = the current process's information (e.g. uid/gid).
++ * modified bprm->argv[4]
++ * = original bprm->filename
++ * modified bprm->argv[5]
++ * = original bprm->argc in string expression
++ * modified bprm->argv[6]
++ * = original bprm->envc in string expression
++ * modified bprm->argv[7]
++ * = original bprm->argv[0]
++ * ...
++ * modified bprm->argv[bprm->argc + 6]
++ * = original bprm->argv[bprm->argc - 1]
++ * modified bprm->argv[bprm->argc + 7]
++ * = original bprm->envp[0]
++ * ...
++ * modified bprm->argv[bprm->envc + bprm->argc + 6]
++ * = original bprm->envp[bprm->envc - 1]
++ */
++ struct linux_binprm *bprm = ee->bprm;
++ struct file *filp;
++ int retval;
++ const int original_argc = bprm->argc;
++ const int original_envc = bprm->envc;
++
++ /* Close the requested program's dentry. */
++ ee->obj.path1.dentry = NULL;
++ ee->obj.path1.mnt = NULL;
++ ee->obj.stat_valid[CCS_PATH1] = false;
++ ee->obj.stat_valid[CCS_PATH1_PARENT] = false;
++ ee->obj.validate_done = false;
++ allow_write_access(bprm->file);
++ fput(bprm->file);
++ bprm->file = NULL;
++
++ /* Invalidate page dump cache. */
++ ee->dump.page = NULL;
++
++ /* Move envp[] to argv[] */
++ bprm->argc += bprm->envc;
++ bprm->envc = 0;
++
++ /* Set argv[6] */
++ {
++ snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, "%d", original_envc);
++ retval = ccs_copy_argv(ee->tmp, bprm);
++ if (retval < 0)
++ goto out;
++ }
++
++ /* Set argv[5] */
++ {
++ snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, "%d", original_argc);
++ retval = ccs_copy_argv(ee->tmp, bprm);
++ if (retval < 0)
++ goto out;
++ }
++
++ /* Set argv[4] */
++ {
++ retval = ccs_copy_argv(bprm->filename, bprm);
++ if (retval < 0)
++ goto out;
++ }
++
++ /* Set argv[3] */
++ {
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0)
++ /*
++ * Pass uid/gid seen from current user namespace, for these
++ * values are used by programs in current user namespace in
++ * order to decide whether to execve() or not (rather than by
++ * auditing daemon in init's user namespace).
++ */
++ snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1,
++ "pid=%d uid=%d gid=%d euid=%d egid=%d suid=%d "
++ "sgid=%d fsuid=%d fsgid=%d", ccs_sys_getpid(),
++ __kuid_val(current_uid()), __kgid_val(current_gid()),
++ __kuid_val(current_euid()),
++ __kgid_val(current_egid()),
++ __kuid_val(current_suid()),
++ __kgid_val(current_sgid()),
++ __kuid_val(current_fsuid()),
++ __kgid_val(current_fsgid()));
++#else
++ snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1,
++ "pid=%d uid=%d gid=%d euid=%d egid=%d suid=%d "
++ "sgid=%d fsuid=%d fsgid=%d", ccs_sys_getpid(),
++ current_uid(), current_gid(), current_euid(),
++ current_egid(), current_suid(), current_sgid(),
++ current_fsuid(), current_fsgid());
++#endif
++ retval = ccs_copy_argv(ee->tmp, bprm);
++ if (retval < 0)
++ goto out;
++ }
++
++ /* Set argv[2] */
++ {
++ char *exe = (char *) ccs_get_exe();
++ if (exe) {
++ retval = ccs_copy_argv(exe, bprm);
++ kfree(exe);
++ } else {
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36)
++ retval = ccs_copy_argv("<unknown>", bprm);
++#else
++ snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, "<unknown>");
++ retval = ccs_copy_argv(ee->tmp, bprm);
++#endif
++ }
++ if (retval < 0)
++ goto out;
++ }
++
++ /* Set argv[1] */
++ {
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36)
++ retval = ccs_copy_argv(ccs_current_domain()->domainname->name,
++ bprm);
++#else
++ snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, "%s",
++ ccs_current_domain()->domainname->name);
++ retval = ccs_copy_argv(ee->tmp, bprm);
++#endif
++ if (retval < 0)
++ goto out;
++ }
++
++ /* Set argv[0] */
++ {
++ struct path root;
++ char *cp;
++ int root_len;
++ int handler_len;
++ get_fs_root(current->fs, &root);
++ cp = ccs_realpath(&root);
++ path_put(&root);
++ if (!cp) {
++ retval = -ENOMEM;
++ goto out;
++ }
++ root_len = strlen(cp);
++ retval = strncmp(ee->handler->name, cp, root_len);
++ root_len--;
++ kfree(cp);
++ if (retval) {
++ retval = -ENOENT;
++ goto out;
++ }
++ handler_len = ee->handler->total_len + 1;
++ cp = kmalloc(handler_len, CCS_GFP_FLAGS);
++ if (!cp) {
++ retval = -ENOMEM;
++ goto out;
++ }
++ /* ee->handler_path is released by ccs_finish_execve(). */
++ ee->handler_path = cp;
++ /* Adjust root directory for open_exec(). */
++ memmove(cp, ee->handler->name + root_len,
++ handler_len - root_len);
++ ccs_unescape(cp);
++ retval = -ENOENT;
++ if (*cp != '/')
++ goto out;
++ retval = ccs_copy_argv(cp, bprm);
++ if (retval < 0)
++ goto out;
++ }
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23)
++#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 24)
++ bprm->argv_len = bprm->exec - bprm->p;
++#endif
++#endif
++
++ /*
++ * OK, now restart the process with execute handler program's dentry.
++ */
++ filp = open_exec(ee->handler_path);
++ if (IS_ERR(filp)) {
++ retval = PTR_ERR(filp);
++ goto out;
++ }
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
++ ee->obj.path1 = filp->f_path;
++#else
++ ee->obj.path1.dentry = filp->f_dentry;
++ ee->obj.path1.mnt = filp->f_vfsmnt;
++#endif
++ bprm->file = filp;
++ bprm->filename = ee->handler_path;
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0)
++ bprm->interp = bprm->filename;
++#endif
++ retval = prepare_binprm(bprm);
++ if (retval < 0)
++ goto out;
++ ee->r.dont_sleep_on_enforce_error = true;
++ retval = ccs_find_next_domain(ee);
++ ee->r.dont_sleep_on_enforce_error = false;
++out:
++ return retval;
++}
++
++/**
++ * ccs_find_execute_handler - Find an execute handler.
++ *
++ * @ee: Pointer to "struct ccs_execve".
++ * @type: Type of execute handler.
++ *
++ * Returns true if found, false otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static bool ccs_find_execute_handler(struct ccs_execve *ee, const u8 type)
++{
++ struct ccs_request_info *r = &ee->r;
++ /*
++ * To avoid infinite execute handler loop, don't use execute handler
++ * if the current process is marked as execute handler.
++ */
++ if (ccs_current_flags() & CCS_TASK_IS_EXECUTE_HANDLER)
++ return false;
++ r->param_type = type;
++ ccs_check_acl(r);
++ if (!r->granted)
++ return false;
++ ee->handler = container_of(r->matched_acl, struct ccs_handler_acl,
++ head)->handler;
++ ee->transition = r->matched_acl && r->matched_acl->cond &&
++ r->matched_acl->cond->exec_transit ?
++ r->matched_acl->cond->transit : NULL;
++ return true;
++}
++
++#endif
++
++#ifdef CONFIG_MMU
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23)
++#define CCS_BPRM_MMU
++#elif defined(RHEL_MAJOR) && RHEL_MAJOR == 5 && defined(RHEL_MINOR) && RHEL_MINOR >= 3
++#define CCS_BPRM_MMU
++#elif defined(AX_MAJOR) && AX_MAJOR == 3 && defined(AX_MINOR) && AX_MINOR >= 2
++#define CCS_BPRM_MMU
++#endif
++#endif
++
++/**
++ * ccs_dump_page - Dump a page to buffer.
++ *
++ * @bprm: Pointer to "struct linux_binprm".
++ * @pos: Location to dump.
++ * @dump: Poiner to "struct ccs_page_dump".
++ *
++ * Returns true on success, false otherwise.
++ */
++bool ccs_dump_page(struct linux_binprm *bprm, unsigned long pos,
++ struct ccs_page_dump *dump)
++{
++ struct page *page;
++ /* dump->data is released by ccs_start_execve(). */
++ if (!dump->data) {
++ dump->data = kzalloc(PAGE_SIZE, CCS_GFP_FLAGS);
++ if (!dump->data)
++ return false;
++ }
++ /* Same with get_arg_page(bprm, pos, 0) in fs/exec.c */
++#ifdef CCS_BPRM_MMU
++ if (get_user_pages(current, bprm->mm, pos, 1, 0, 1, &page, NULL) <= 0)
++ return false;
++#else
++ page = bprm->page[pos / PAGE_SIZE];
++#endif
++ if (page != dump->page) {
++ const unsigned int offset = pos % PAGE_SIZE;
++ /*
++ * Maybe kmap()/kunmap() should be used here.
++ * But remove_arg_zero() uses kmap_atomic()/kunmap_atomic().
++ * So do I.
++ */
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 37)
++ char *kaddr = kmap_atomic(page);
++#else
++ char *kaddr = kmap_atomic(page, KM_USER0);
++#endif
++ dump->page = page;
++ memcpy(dump->data + offset, kaddr + offset,
++ PAGE_SIZE - offset);
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 37)
++ kunmap_atomic(kaddr);
++#else
++ kunmap_atomic(kaddr, KM_USER0);
++#endif
++ }
++ /* Same with put_arg_page(page) in fs/exec.c */
++#ifdef CCS_BPRM_MMU
++ put_page(page);
++#endif
++ return true;
++}
++
++/**
++ * ccs_start_execve - Prepare for execve() operation.
++ *
++ * @bprm: Pointer to "struct linux_binprm".
++ * @eep: Pointer to "struct ccs_execve *".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_start_execve(struct linux_binprm *bprm,
++ struct ccs_execve **eep)
++{
++ int retval;
++ struct ccs_security *task = ccs_current_security();
++ struct ccs_execve *ee;
++ int idx;
++ *eep = NULL;
++ ee = kzalloc(sizeof(*ee), CCS_GFP_FLAGS);
++ if (!ee)
++ return -ENOMEM;
++ ee->tmp = kzalloc(CCS_EXEC_TMPSIZE, CCS_GFP_FLAGS);
++ if (!ee->tmp) {
++ kfree(ee);
++ return -ENOMEM;
++ }
++ idx = ccs_read_lock();
++ /* ee->dump->data is allocated by ccs_dump_page(). */
++ ee->previous_domain = task->ccs_domain_info;
++ /* Clear manager flag. */
++ task->ccs_flags &= ~CCS_TASK_IS_MANAGER;
++ *eep = ee;
++ ccs_init_request_info(&ee->r, CCS_MAC_FILE_EXECUTE);
++ ee->r.ee = ee;
++ ee->bprm = bprm;
++ ee->r.obj = &ee->obj;
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
++ ee->obj.path1 = bprm->file->f_path;
++#else
++ ee->obj.path1.dentry = bprm->file->f_dentry;
++ ee->obj.path1.mnt = bprm->file->f_vfsmnt;
++#endif
++#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
++ /*
++ * No need to call ccs_environ() for execute handler because envp[] is
++ * moved to argv[].
++ */
++ if (ccs_find_execute_handler(ee, CCS_TYPE_AUTO_EXECUTE_HANDLER)) {
++ retval = ccs_try_alt_exec(ee);
++ goto done;
++ }
++#endif
++ retval = ccs_find_next_domain(ee);
++#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
++ if (retval == -EPERM &&
++ ccs_find_execute_handler(ee, CCS_TYPE_DENIED_EXECUTE_HANDLER)) {
++ retval = ccs_try_alt_exec(ee);
++ goto done;
++ }
++#endif
++#ifdef CONFIG_CCSECURITY_MISC
++ if (!retval)
++ retval = ccs_environ(ee);
++#endif
++#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
++done:
++#endif
++ ccs_read_unlock(idx);
++ kfree(ee->tmp);
++ ee->tmp = NULL;
++ kfree(ee->dump.data);
++ ee->dump.data = NULL;
++ return retval;
++}
++
++/**
++ * ccs_finish_execve - Clean up execve() operation.
++ *
++ * @retval: Return code of an execve() operation.
++ * @ee: Pointer to "struct ccs_execve".
++ *
++ * Returns nothing.
++ */
++static void ccs_finish_execve(int retval, struct ccs_execve *ee)
++{
++ struct ccs_security *task = ccs_current_security();
++ if (!ee)
++ return;
++ if (retval < 0) {
++ task->ccs_domain_info = ee->previous_domain;
++ /*
++ * Make task->ccs_domain_info visible to GC before changing
++ * task->ccs_flags.
++ */
++ smp_wmb();
++ } else {
++ /* Mark the current process as execute handler. */
++ if (ee->handler)
++ task->ccs_flags |= CCS_TASK_IS_EXECUTE_HANDLER;
++ /* Mark the current process as normal process. */
++ else
++ task->ccs_flags &= ~CCS_TASK_IS_EXECUTE_HANDLER;
++ }
++ /* Tell GC that I finished execve(). */
++ task->ccs_flags &= ~CCS_TASK_IS_IN_EXECVE;
++ kfree(ee->handler_path);
++ kfree(ee);
++}
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 8, 0)
++
++/**
++ * __ccs_search_binary_handler - Main routine for do_execve().
++ *
++ * @bprm: Pointer to "struct linux_binprm".
++ *
++ * Returns 0 on success, negative value otherwise.
++ *
++ * Performs permission checks for do_execve() and domain transition.
++ * Domain transition by "struct ccs_domain_transition_control" and
++ * "auto_domain_transition=" parameter of "struct ccs_condition" are reverted
++ * if do_execve() failed.
++ * Garbage collector does not remove "struct ccs_domain_info" from
++ * ccs_domain_list nor kfree("struct ccs_domain_info") if the current thread is
++ * marked as CCS_TASK_IS_IN_EXECVE.
++ */
++static int __ccs_search_binary_handler(struct linux_binprm *bprm)
++{
++ struct ccs_execve *ee;
++ int retval;
++#ifndef CONFIG_CCSECURITY_OMIT_USERSPACE_LOADER
++ if (!ccs_policy_loaded)
++ ccsecurity_exports.load_policy(bprm->filename);
++#endif
++ retval = ccs_start_execve(bprm, &ee);
++ if (!retval)
++ retval = search_binary_handler(bprm);
++ ccs_finish_execve(retval, ee);
++ return retval;
++}
++
++#else
++
++/**
++ * __ccs_search_binary_handler - Main routine for do_execve().
++ *
++ * @bprm: Pointer to "struct linux_binprm".
++ * @regs: Pointer to "struct pt_regs".
++ *
++ * Returns 0 on success, negative value otherwise.
++ *
++ * Performs permission checks for do_execve() and domain transition.
++ * Domain transition by "struct ccs_domain_transition_control" and
++ * "auto_domain_transition=" parameter of "struct ccs_condition" are reverted
++ * if do_execve() failed.
++ * Garbage collector does not remove "struct ccs_domain_info" from
++ * ccs_domain_list nor kfree("struct ccs_domain_info") if the current thread is
++ * marked as CCS_TASK_IS_IN_EXECVE.
++ */
++static int __ccs_search_binary_handler(struct linux_binprm *bprm,
++ struct pt_regs *regs)
++{
++ struct ccs_execve *ee;
++ int retval;
++#ifndef CONFIG_CCSECURITY_OMIT_USERSPACE_LOADER
++ if (!ccs_policy_loaded)
++ ccsecurity_exports.load_policy(bprm->filename);
++#endif
++ retval = ccs_start_execve(bprm, &ee);
++ if (!retval)
++ retval = search_binary_handler(bprm, regs);
++ ccs_finish_execve(retval, ee);
++ return retval;
++}
++
++#endif
++
++/**
++ * ccs_permission_init - Register permission check hooks.
++ *
++ * Returns nothing.
++ */
++void __init ccs_permission_init(void)
++{
++#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 32)
++ ccsecurity_ops.save_open_mode = __ccs_save_open_mode;
++ ccsecurity_ops.clear_open_mode = __ccs_clear_open_mode;
++ ccsecurity_ops.open_permission = __ccs_open_permission;
++#else
++ ccsecurity_ops.open_permission = ccs_new_open_permission;
++#endif
++ ccsecurity_ops.fcntl_permission = __ccs_fcntl_permission;
++ ccsecurity_ops.ioctl_permission = __ccs_ioctl_permission;
++ ccsecurity_ops.chmod_permission = __ccs_chmod_permission;
++ ccsecurity_ops.chown_permission = __ccs_chown_permission;
++#ifdef CONFIG_CCSECURITY_FILE_GETATTR
++ ccsecurity_ops.getattr_permission = __ccs_getattr_permission;
++#endif
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
++ ccsecurity_ops.pivot_root_permission = __ccs_pivot_root_permission;
++ ccsecurity_ops.chroot_permission = __ccs_chroot_permission;
++#else
++ ccsecurity_ops.pivot_root_permission = ccs_old_pivot_root_permission;
++ ccsecurity_ops.chroot_permission = ccs_old_chroot_permission;
++#endif
++ ccsecurity_ops.umount_permission = __ccs_umount_permission;
++ ccsecurity_ops.mknod_permission = __ccs_mknod_permission;
++ ccsecurity_ops.mkdir_permission = __ccs_mkdir_permission;
++ ccsecurity_ops.rmdir_permission = __ccs_rmdir_permission;
++ ccsecurity_ops.unlink_permission = __ccs_unlink_permission;
++ ccsecurity_ops.symlink_permission = __ccs_symlink_permission;
++ ccsecurity_ops.truncate_permission = __ccs_truncate_permission;
++ ccsecurity_ops.rename_permission = __ccs_rename_permission;
++ ccsecurity_ops.link_permission = __ccs_link_permission;
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30)
++ ccsecurity_ops.open_exec_permission = __ccs_open_exec_permission;
++ ccsecurity_ops.uselib_permission = __ccs_uselib_permission;
++#endif
++#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 18) || (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33) && defined(CONFIG_SYSCTL_SYSCALL))
++ ccsecurity_ops.parse_table = __ccs_parse_table;
++#endif
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
++ ccsecurity_ops.mount_permission = __ccs_mount_permission;
++#else
++ ccsecurity_ops.mount_permission = ccs_old_mount_permission;
++#endif
++#ifdef CONFIG_CCSECURITY_CAPABILITY
++ ccsecurity_ops.socket_create_permission =
++ __ccs_socket_create_permission;
++#endif
++#ifdef CONFIG_CCSECURITY_NETWORK
++ ccsecurity_ops.socket_listen_permission =
++ __ccs_socket_listen_permission;
++ ccsecurity_ops.socket_connect_permission =
++ __ccs_socket_connect_permission;
++ ccsecurity_ops.socket_bind_permission = __ccs_socket_bind_permission;
++ ccsecurity_ops.socket_post_accept_permission =
++ __ccs_socket_post_accept_permission;
++ ccsecurity_ops.socket_sendmsg_permission =
++ __ccs_socket_sendmsg_permission;
++#endif
++#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
++ ccsecurity_ops.socket_post_recvmsg_permission =
++ __ccs_socket_post_recvmsg_permission;
++#endif
++#ifdef CONFIG_CCSECURITY_IPC
++ ccsecurity_ops.kill_permission = ccs_signal_acl;
++ ccsecurity_ops.tgkill_permission = ccs_signal_acl0;
++ ccsecurity_ops.tkill_permission = ccs_signal_acl;
++ ccsecurity_ops.sigqueue_permission = ccs_signal_acl;
++ ccsecurity_ops.tgsigqueue_permission = ccs_signal_acl0;
++#endif
++#ifdef CONFIG_CCSECURITY_CAPABILITY
++ ccsecurity_ops.capable = __ccs_capable;
++ ccsecurity_ops.ptrace_permission = __ccs_ptrace_permission;
++#endif
++ ccsecurity_ops.search_binary_handler = __ccs_search_binary_handler;
++}
++
++/**
++ * ccs_kern_path - Wrapper for kern_path().
++ *
++ * @pathname: Pathname to resolve. Maybe NULL.
++ * @flags: Lookup flags.
++ * @path: Pointer to "struct path".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_kern_path(const char *pathname, int flags, struct path *path)
++{
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
++ if (!pathname || kern_path(pathname, flags, path))
++ return -ENOENT;
++#else
++ struct nameidata nd;
++ if (!pathname || path_lookup(pathname, flags, &nd))
++ return -ENOENT;
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
++ *path = nd.path;
++#else
++ path->dentry = nd.dentry;
++ path->mnt = nd.mnt;
++#endif
++#endif
++ return 0;
++}
++
++/**
++ * ccs_get_path - Get dentry/vfsmmount of a pathname.
++ *
++ * @pathname: The pathname to solve. Maybe NULL.
++ * @path: Pointer to "struct path".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_get_path(const char *pathname, struct path *path)
++{
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0)
++ return ccs_kern_path(pathname, LOOKUP_FOLLOW, path);
++#else
++ return ccs_kern_path(pathname, LOOKUP_FOLLOW | LOOKUP_POSITIVE, path);
++#endif
++}
++
++/**
++ * ccs_symlink_path - Get symlink's pathname.
++ *
++ * @pathname: The pathname to solve. Maybe NULL.
++ * @name: Pointer to "struct ccs_path_info".
++ *
++ * Returns 0 on success, negative value otherwise.
++ *
++ * This function uses kzalloc(), so caller must kfree() if this function
++ * didn't return NULL.
++ */
++static int ccs_symlink_path(const char *pathname, struct ccs_path_info *name)
++{
++ char *buf;
++ struct path path;
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0)
++ if (ccs_kern_path(pathname, 0, &path))
++ return -ENOENT;
++#else
++ if (ccs_kern_path(pathname, LOOKUP_POSITIVE, &path))
++ return -ENOENT;
++#endif
++ buf = ccs_realpath(&path);
++ path_put(&path);
++ if (buf) {
++ name->name = buf;
++ ccs_fill_path_info(name);
++ return 0;
++ }
++ return -ENOMEM;
++}
++
++/**
++ * ccs_check_mount_acl - Check permission for path path path number operation.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ * @ptr: Pointer to "struct ccs_acl_info".
++ *
++ * Returns true if granted, false otherwise.
++ */
++static bool ccs_check_mount_acl(struct ccs_request_info *r,
++ const struct ccs_acl_info *ptr)
++{
++ const struct ccs_mount_acl *acl =
++ container_of(ptr, typeof(*acl), head);
++ return ccs_compare_number_union(r->param.mount.flags, &acl->flags) &&
++ ccs_compare_name_union(r->param.mount.type, &acl->fs_type) &&
++ ccs_compare_name_union(r->param.mount.dir, &acl->dir_name) &&
++ (!r->param.mount.need_dev ||
++ ccs_compare_name_union(r->param.mount.dev, &acl->dev_name));
++}
++
++/**
++ * ccs_mount_acl - Check permission for mount() operation.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ * @dev_name: Name of device file. Maybe NULL.
++ * @dir: Pointer to "struct path".
++ * @type: Name of filesystem type.
++ * @flags: Mount options.
++ *
++ * Returns 0 on success, negative value otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static int ccs_mount_acl(struct ccs_request_info *r, const char *dev_name,
++ struct path *dir, const char *type,
++ unsigned long flags)
++{
++ struct ccs_obj_info obj = { };
++ struct file_system_type *fstype = NULL;
++ const char *requested_type = NULL;
++ const char *requested_dir_name = NULL;
++ const char *requested_dev_name = NULL;
++ struct ccs_path_info rtype;
++ struct ccs_path_info rdev;
++ struct ccs_path_info rdir;
++ int need_dev = 0;
++ int error = -ENOMEM;
++ r->obj = &obj;
++
++ /* Get fstype. */
++ requested_type = ccs_encode(type);
++ if (!requested_type)
++ goto out;
++ rtype.name = requested_type;
++ ccs_fill_path_info(&rtype);
++
++ /* Get mount point. */
++ obj.path2 = *dir;
++ requested_dir_name = ccs_realpath(dir);
++ if (!requested_dir_name) {
++ error = -ENOMEM;
++ goto out;
++ }
++ rdir.name = requested_dir_name;
++ ccs_fill_path_info(&rdir);
++
++ /* Compare fs name. */
++ if (type == ccs_mounts[CCS_MOUNT_REMOUNT]) {
++ /* dev_name is ignored. */
++ } else if (type == ccs_mounts[CCS_MOUNT_MAKE_UNBINDABLE] ||
++ type == ccs_mounts[CCS_MOUNT_MAKE_PRIVATE] ||
++ type == ccs_mounts[CCS_MOUNT_MAKE_SLAVE] ||
++ type == ccs_mounts[CCS_MOUNT_MAKE_SHARED]) {
++ /* dev_name is ignored. */
++ } else if (type == ccs_mounts[CCS_MOUNT_BIND] ||
++ type == ccs_mounts[CCS_MOUNT_MOVE]) {
++ need_dev = -1; /* dev_name is a directory */
++ } else {
++ fstype = get_fs_type(type);
++ if (!fstype) {
++ error = -ENODEV;
++ goto out;
++ }
++ if (fstype->fs_flags & FS_REQUIRES_DEV)
++ /* dev_name is a block device file. */
++ need_dev = 1;
++ }
++ if (need_dev) {
++ /* Get mount point or device file. */
++ if (ccs_get_path(dev_name, &obj.path1)) {
++ error = -ENOENT;
++ goto out;
++ }
++ requested_dev_name = ccs_realpath(&obj.path1);
++ if (!requested_dev_name) {
++ error = -ENOENT;
++ goto out;
++ }
++ } else {
++ /* Map dev_name to "<NULL>" if no dev_name given. */
++ if (!dev_name)
++ dev_name = "<NULL>";
++ requested_dev_name = ccs_encode(dev_name);
++ if (!requested_dev_name) {
++ error = -ENOMEM;
++ goto out;
++ }
++ }
++ rdev.name = requested_dev_name;
++ ccs_fill_path_info(&rdev);
++ r->param_type = CCS_TYPE_MOUNT_ACL;
++ r->param.mount.need_dev = need_dev;
++ r->param.mount.dev = &rdev;
++ r->param.mount.dir = &rdir;
++ r->param.mount.type = &rtype;
++ r->param.mount.flags = flags;
++ error = ccs_check_acl(r);
++out:
++ kfree(requested_dev_name);
++ kfree(requested_dir_name);
++ if (fstype)
++ ccs_put_filesystem(fstype);
++ kfree(requested_type);
++ /* Drop refcount obtained by ccs_get_path(). */
++ if (obj.path1.dentry)
++ path_put(&obj.path1);
++ return error;
++}
++
++/**
++ * __ccs_mount_permission - Check permission for mount() operation.
++ *
++ * @dev_name: Name of device file. Maybe NULL.
++ * @path: Pointer to "struct path".
++ * @type: Name of filesystem type. Maybe NULL.
++ * @flags: Mount options.
++ * @data_page: Optional data. Maybe NULL.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_mount_permission(const char *dev_name, struct path *path,
++ const char *type, unsigned long flags,
++ void *data_page)
++{
++ struct ccs_request_info r;
++ int error = 0;
++ int idx;
++ if ((flags & MS_MGC_MSK) == MS_MGC_VAL)
++ flags &= ~MS_MGC_MSK;
++ if (flags & MS_REMOUNT) {
++ type = ccs_mounts[CCS_MOUNT_REMOUNT];
++ flags &= ~MS_REMOUNT;
++ } else if (flags & MS_BIND) {
++ type = ccs_mounts[CCS_MOUNT_BIND];
++ flags &= ~MS_BIND;
++ } else if (flags & MS_SHARED) {
++ if (flags & (MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE))
++ return -EINVAL;
++ type = ccs_mounts[CCS_MOUNT_MAKE_SHARED];
++ flags &= ~MS_SHARED;
++ } else if (flags & MS_PRIVATE) {
++ if (flags & (MS_SHARED | MS_SLAVE | MS_UNBINDABLE))
++ return -EINVAL;
++ type = ccs_mounts[CCS_MOUNT_MAKE_PRIVATE];
++ flags &= ~MS_PRIVATE;
++ } else if (flags & MS_SLAVE) {
++ if (flags & (MS_SHARED | MS_PRIVATE | MS_UNBINDABLE))
++ return -EINVAL;
++ type = ccs_mounts[CCS_MOUNT_MAKE_SLAVE];
++ flags &= ~MS_SLAVE;
++ } else if (flags & MS_UNBINDABLE) {
++ if (flags & (MS_SHARED | MS_PRIVATE | MS_SLAVE))
++ return -EINVAL;
++ type = ccs_mounts[CCS_MOUNT_MAKE_UNBINDABLE];
++ flags &= ~MS_UNBINDABLE;
++ } else if (flags & MS_MOVE) {
++ type = ccs_mounts[CCS_MOUNT_MOVE];
++ flags &= ~MS_MOVE;
++ }
++ if (!type)
++ type = "<NULL>";
++ idx = ccs_read_lock();
++ if (ccs_init_request_info(&r, CCS_MAC_FILE_MOUNT)
++ != CCS_CONFIG_DISABLED)
++ error = ccs_mount_acl(&r, dev_name, path, type, flags);
++ ccs_read_unlock(idx);
++ return error;
++}
++
++#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 24)
++
++/**
++ * ccs_old_mount_permission - Check permission for mount() operation.
++ *
++ * @dev_name: Name of device file.
++ * @nd: Pointer to "struct nameidata".
++ * @type: Name of filesystem type. Maybe NULL.
++ * @flags: Mount options.
++ * @data_page: Optional data. Maybe NULL.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_old_mount_permission(const char *dev_name, struct nameidata *nd,
++ const char *type, unsigned long flags,
++ void *data_page)
++{
++ struct path path = { nd->mnt, nd->dentry };
++ return __ccs_mount_permission(dev_name, &path, type, flags, data_page);
++}
++
++#endif
++
++/**
++ * ccs_compare_number_union - Check whether a value matches "struct ccs_number_union" or not.
++ *
++ * @value: Number to check.
++ * @ptr: Pointer to "struct ccs_number_union".
++ *
++ * Returns true if @value matches @ptr, false otherwise.
++ */
++static bool ccs_compare_number_union(const unsigned long value,
++ const struct ccs_number_union *ptr)
++{
++ if (ptr->group)
++ return ccs_number_matches_group(value, value, ptr->group);
++ return value >= ptr->values[0] && value <= ptr->values[1];
++}
++
++/**
++ * ccs_compare_name_union - Check whether a name matches "struct ccs_name_union" or not.
++ *
++ * @name: Pointer to "struct ccs_path_info".
++ * @ptr: Pointer to "struct ccs_name_union".
++ *
++ * Returns "struct ccs_path_info" if @name matches @ptr, NULL otherwise.
++ */
++static const struct ccs_path_info *ccs_compare_name_union
++(const struct ccs_path_info *name, const struct ccs_name_union *ptr)
++{
++ if (ptr->group)
++ return ccs_path_matches_group(name, ptr->group);
++ if (ccs_path_matches_pattern(name, ptr->filename))
++ return ptr->filename;
++ return NULL;
++}
++
++/**
++ * ccs_add_slash - Add trailing '/' if needed.
++ *
++ * @buf: Pointer to "struct ccs_path_info".
++ *
++ * Returns nothing.
++ *
++ * @buf must be generated by ccs_encode() because this function does not
++ * allocate memory for adding '/'.
++ */
++static void ccs_add_slash(struct ccs_path_info *buf)
++{
++ if (buf->is_dir)
++ return;
++ /* This is OK because ccs_encode() reserves space for appending "/". */
++ strcat((char *) buf->name, "/");
++ ccs_fill_path_info(buf);
++}
++
++/**
++ * ccs_get_realpath - Get realpath.
++ *
++ * @buf: Pointer to "struct ccs_path_info".
++ * @path: Pointer to "struct path". @path->mnt may be NULL.
++ *
++ * Returns true on success, false otherwise.
++ */
++static bool ccs_get_realpath(struct ccs_path_info *buf, struct path *path)
++{
++ buf->name = ccs_realpath(path);
++ if (buf->name) {
++ ccs_fill_path_info(buf);
++ return true;
++ }
++ return false;
++}
++
++/**
++ * ccs_check_path_acl - Check permission for path operation.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ * @ptr: Pointer to "struct ccs_acl_info".
++ *
++ * Returns true if granted, false otherwise.
++ *
++ * To be able to use wildcard for domain transition, this function sets
++ * matching entry on success. Since the caller holds ccs_read_lock(),
++ * it is safe to set matching entry.
++ */
++static bool ccs_check_path_acl(struct ccs_request_info *r,
++ const struct ccs_acl_info *ptr)
++{
++ const struct ccs_path_acl *acl = container_of(ptr, typeof(*acl), head);
++ if (ptr->perm & (1 << r->param.path.operation)) {
++ r->param.path.matched_path =
++ ccs_compare_name_union(r->param.path.filename,
++ &acl->name);
++ return r->param.path.matched_path != NULL;
++ }
++ return false;
++}
++
++/**
++ * ccs_check_path_number_acl - Check permission for path number operation.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ * @ptr: Pointer to "struct ccs_acl_info".
++ *
++ * Returns true if granted, false otherwise.
++ */
++static bool ccs_check_path_number_acl(struct ccs_request_info *r,
++ const struct ccs_acl_info *ptr)
++{
++ const struct ccs_path_number_acl *acl =
++ container_of(ptr, typeof(*acl), head);
++ return (ptr->perm & (1 << r->param.path_number.operation)) &&
++ ccs_compare_number_union(r->param.path_number.number,
++ &acl->number) &&
++ ccs_compare_name_union(r->param.path_number.filename,
++ &acl->name);
++}
++
++/**
++ * ccs_check_path2_acl - Check permission for path path operation.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ * @ptr: Pointer to "struct ccs_acl_info".
++ *
++ * Returns true if granted, false otherwise.
++ */
++static bool ccs_check_path2_acl(struct ccs_request_info *r,
++ const struct ccs_acl_info *ptr)
++{
++ const struct ccs_path2_acl *acl =
++ container_of(ptr, typeof(*acl), head);
++ return (ptr->perm & (1 << r->param.path2.operation)) &&
++ ccs_compare_name_union(r->param.path2.filename1, &acl->name1)
++ && ccs_compare_name_union(r->param.path2.filename2,
++ &acl->name2);
++}
++
++/**
++ * ccs_check_mkdev_acl - Check permission for path number number number operation.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ * @ptr: Pointer to "struct ccs_acl_info".
++ *
++ * Returns true if granted, false otherwise.
++ */
++static bool ccs_check_mkdev_acl(struct ccs_request_info *r,
++ const struct ccs_acl_info *ptr)
++{
++ const struct ccs_mkdev_acl *acl =
++ container_of(ptr, typeof(*acl), head);
++ return (ptr->perm & (1 << r->param.mkdev.operation)) &&
++ ccs_compare_number_union(r->param.mkdev.mode, &acl->mode) &&
++ ccs_compare_number_union(r->param.mkdev.major, &acl->major) &&
++ ccs_compare_number_union(r->param.mkdev.minor, &acl->minor) &&
++ ccs_compare_name_union(r->param.mkdev.filename, &acl->name);
++}
++
++/**
++ * ccs_path_permission - Check permission for path operation.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ * @operation: Type of operation.
++ * @filename: Filename to check.
++ *
++ * Returns 0 on success, negative value otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static int ccs_path_permission(struct ccs_request_info *r, u8 operation,
++ const struct ccs_path_info *filename)
++{
++ r->type = ccs_p2mac[operation];
++ r->mode = ccs_get_mode(r->profile, r->type);
++ if (r->mode == CCS_CONFIG_DISABLED)
++ return 0;
++ r->param_type = CCS_TYPE_PATH_ACL;
++ r->param.path.filename = filename;
++ r->param.path.operation = operation;
++ return ccs_check_acl(r);
++}
++
++/**
++ * ccs_execute_permission - Check permission for execute operation.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ * @filename: Filename to check.
++ *
++ * Returns 0 on success, CCS_RETRY_REQUEST on retry, negative value otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static int ccs_execute_permission(struct ccs_request_info *r,
++ const struct ccs_path_info *filename)
++{
++ int error;
++ /*
++ * Unlike other permission checks, this check is done regardless of
++ * profile mode settings in order to check for domain transition
++ * preference.
++ */
++ r->type = CCS_MAC_FILE_EXECUTE;
++ r->mode = ccs_get_mode(r->profile, r->type);
++ r->param_type = CCS_TYPE_PATH_ACL;
++ r->param.path.filename = filename;
++ r->param.path.operation = CCS_TYPE_EXECUTE;
++ error = ccs_check_acl(r);
++ r->ee->transition = r->matched_acl && r->matched_acl->cond &&
++ r->matched_acl->cond->exec_transit ?
++ r->matched_acl->cond->transit : NULL;
++ return error;
++}
++
++#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 32)
++
++/**
++ * __ccs_save_open_mode - Remember original flags passed to sys_open().
++ *
++ * @mode: Flags passed to sys_open().
++ *
++ * Returns nothing.
++ *
++ * TOMOYO does not check "file write" if open(path, O_TRUNC | O_RDONLY) was
++ * requested because write() is not permitted. Instead, TOMOYO checks
++ * "file truncate" if O_TRUNC is passed.
++ *
++ * TOMOYO does not check "file read" and "file write" if open(path, 3) was
++ * requested because read()/write() are not permitted. Instead, TOMOYO checks
++ * "file ioctl" when ioctl() is requested.
++ */
++static void __ccs_save_open_mode(int mode)
++{
++ if ((mode & 3) == 3)
++ ccs_current_security()->ccs_flags |= CCS_OPEN_FOR_IOCTL_ONLY;
++#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 14)
++ /* O_TRUNC passes MAY_WRITE to ccs_open_permission(). */
++ else if (!(mode & 3) && (mode & O_TRUNC))
++ ccs_current_security()->ccs_flags |=
++ CCS_OPEN_FOR_READ_TRUNCATE;
++#endif
++}
++
++/**
++ * __ccs_clear_open_mode - Forget original flags passed to sys_open().
++ *
++ * Returns nothing.
++ */
++static void __ccs_clear_open_mode(void)
++{
++ ccs_current_security()->ccs_flags &= ~(CCS_OPEN_FOR_IOCTL_ONLY |
++ CCS_OPEN_FOR_READ_TRUNCATE);
++}
++
++#endif
++
++/**
++ * __ccs_open_permission - Check permission for "read" and "write".
++ *
++ * @dentry: Pointer to "struct dentry".
++ * @mnt: Pointer to "struct vfsmount". Maybe NULL.
++ * @flag: Flags for open().
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_open_permission(struct dentry *dentry, struct vfsmount *mnt,
++ const int flag)
++{
++ struct ccs_request_info r;
++ struct ccs_obj_info obj = {
++ .path1.dentry = dentry,
++ .path1.mnt = mnt,
++ };
++ const u32 ccs_flags = ccs_current_flags();
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 33)
++ const u8 acc_mode = (flag & 3) == 3 ? 0 : ACC_MODE(flag);
++#else
++ const u8 acc_mode = (ccs_flags & CCS_OPEN_FOR_IOCTL_ONLY) ? 0 :
++#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 14)
++ (ccs_flags & CCS_OPEN_FOR_READ_TRUNCATE) ? 4 :
++#endif
++ ACC_MODE(flag);
++#endif
++ int error = 0;
++ struct ccs_path_info buf;
++ int idx;
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 30)
++ if (current->in_execve && !(ccs_flags & CCS_TASK_IS_IN_EXECVE))
++ return 0;
++#endif
++#ifndef CONFIG_CCSECURITY_FILE_READDIR
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 0)
++ if (d_is_dir(dentry))
++ return 0;
++#else
++ if (dentry->d_inode && S_ISDIR(dentry->d_inode->i_mode))
++ return 0;
++#endif
++#endif
++ buf.name = NULL;
++ r.mode = CCS_CONFIG_DISABLED;
++ idx = ccs_read_lock();
++ if (acc_mode && ccs_init_request_info(&r, CCS_MAC_FILE_OPEN)
++ != CCS_CONFIG_DISABLED) {
++ if (!ccs_get_realpath(&buf, &obj.path1)) {
++ error = -ENOMEM;
++ goto out;
++ }
++ r.obj = &obj;
++ if (acc_mode & MAY_READ)
++ error = ccs_path_permission(&r, CCS_TYPE_READ, &buf);
++ if (!error && (acc_mode & MAY_WRITE))
++ error = ccs_path_permission(&r, (flag & O_APPEND) ?
++ CCS_TYPE_APPEND :
++ CCS_TYPE_WRITE, &buf);
++ }
++#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 32)
++ if (!error && (flag & O_TRUNC) &&
++ ccs_init_request_info(&r, CCS_MAC_FILE_TRUNCATE)
++ != CCS_CONFIG_DISABLED) {
++ if (!buf.name && !ccs_get_realpath(&buf, &obj.path1)) {
++ error = -ENOMEM;
++ goto out;
++ }
++ r.obj = &obj;
++ error = ccs_path_permission(&r, CCS_TYPE_TRUNCATE, &buf);
++ }
++#endif
++out:
++ kfree(buf.name);
++ ccs_read_unlock(idx);
++ if (r.mode != CCS_CONFIG_ENFORCING)
++ error = 0;
++ return error;
++}
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 33)
++
++/**
++ * ccs_new_open_permission - Check permission for "read" and "write".
++ *
++ * @filp: Pointer to "struct file".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_new_open_permission(struct file *filp)
++{
++ return __ccs_open_permission(filp->f_path.dentry, filp->f_path.mnt,
++ filp->f_flags);
++}
++
++#endif
++
++/**
++ * ccs_path_perm - Check permission for "unlink", "rmdir", "truncate", "symlink", "append", "getattr", "chroot" and "unmount".
++ *
++ * @operation: Type of operation.
++ * @dentry: Pointer to "struct dentry".
++ * @mnt: Pointer to "struct vfsmount". Maybe NULL.
++ * @target: Symlink's target if @operation is CCS_TYPE_SYMLINK,
++ * NULL otherwise.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_path_perm(const u8 operation, struct dentry *dentry,
++ struct vfsmount *mnt, const char *target)
++{
++ struct ccs_request_info r;
++ struct ccs_obj_info obj = {
++ .path1.dentry = dentry,
++ .path1.mnt = mnt,
++ };
++ int error = 0;
++ struct ccs_path_info buf;
++ bool is_enforce = false;
++ struct ccs_path_info symlink_target;
++ int idx;
++ buf.name = NULL;
++ symlink_target.name = NULL;
++ idx = ccs_read_lock();
++ if (ccs_init_request_info(&r, ccs_p2mac[operation])
++ == CCS_CONFIG_DISABLED)
++ goto out;
++ is_enforce = (r.mode == CCS_CONFIG_ENFORCING);
++ error = -ENOMEM;
++ if (!ccs_get_realpath(&buf, &obj.path1))
++ goto out;
++ r.obj = &obj;
++ switch (operation) {
++ case CCS_TYPE_RMDIR:
++ case CCS_TYPE_CHROOT:
++ ccs_add_slash(&buf);
++ break;
++ case CCS_TYPE_SYMLINK:
++ symlink_target.name = ccs_encode(target);
++ if (!symlink_target.name)
++ goto out;
++ ccs_fill_path_info(&symlink_target);
++ obj.symlink_target = &symlink_target;
++ break;
++ }
++ error = ccs_path_permission(&r, operation, &buf);
++ if (operation == CCS_TYPE_SYMLINK)
++ kfree(symlink_target.name);
++out:
++ kfree(buf.name);
++ ccs_read_unlock(idx);
++ if (!is_enforce)
++ error = 0;
++ return error;
++}
++
++/**
++ * ccs_mkdev_perm - Check permission for "mkblock" and "mkchar".
++ *
++ * @operation: Type of operation. (CCS_TYPE_MKCHAR or CCS_TYPE_MKBLOCK)
++ * @dentry: Pointer to "struct dentry".
++ * @mnt: Pointer to "struct vfsmount". Maybe NULL.
++ * @mode: Create mode.
++ * @dev: Device number.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_mkdev_perm(const u8 operation, struct dentry *dentry,
++ struct vfsmount *mnt, const unsigned int mode,
++ unsigned int dev)
++{
++ struct ccs_request_info r;
++ struct ccs_obj_info obj = {
++ .path1.dentry = dentry,
++ .path1.mnt = mnt,
++ };
++ int error = 0;
++ struct ccs_path_info buf;
++ bool is_enforce = false;
++ int idx;
++ idx = ccs_read_lock();
++ if (ccs_init_request_info(&r, ccs_pnnn2mac[operation])
++ == CCS_CONFIG_DISABLED)
++ goto out;
++ is_enforce = (r.mode == CCS_CONFIG_ENFORCING);
++ error = -EPERM;
++ if (!capable(CAP_MKNOD))
++ goto out;
++ error = -ENOMEM;
++ if (!ccs_get_realpath(&buf, &obj.path1))
++ goto out;
++ r.obj = &obj;
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0)
++ dev = new_decode_dev(dev);
++#endif
++ r.param_type = CCS_TYPE_MKDEV_ACL;
++ r.param.mkdev.filename = &buf;
++ r.param.mkdev.operation = operation;
++ r.param.mkdev.mode = mode;
++ r.param.mkdev.major = MAJOR(dev);
++ r.param.mkdev.minor = MINOR(dev);
++ error = ccs_check_acl(&r);
++ kfree(buf.name);
++out:
++ ccs_read_unlock(idx);
++ if (!is_enforce)
++ error = 0;
++ return error;
++}
++
++/**
++ * ccs_path2_perm - Check permission for "rename", "link" and "pivot_root".
++ *
++ * @operation: Type of operation.
++ * @dentry1: Pointer to "struct dentry".
++ * @mnt1: Pointer to "struct vfsmount". Maybe NULL.
++ * @dentry2: Pointer to "struct dentry".
++ * @mnt2: Pointer to "struct vfsmount". Maybe NULL.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_path2_perm(const u8 operation, struct dentry *dentry1,
++ struct vfsmount *mnt1, struct dentry *dentry2,
++ struct vfsmount *mnt2)
++{
++ struct ccs_request_info r;
++ int error = 0;
++ struct ccs_path_info buf1;
++ struct ccs_path_info buf2;
++ bool is_enforce = false;
++ struct ccs_obj_info obj = {
++ .path1.dentry = dentry1,
++ .path1.mnt = mnt1,
++ .path2.dentry = dentry2,
++ .path2.mnt = mnt2,
++ };
++ int idx;
++ buf1.name = NULL;
++ buf2.name = NULL;
++ idx = ccs_read_lock();
++ if (ccs_init_request_info(&r, ccs_pp2mac[operation])
++ == CCS_CONFIG_DISABLED)
++ goto out;
++ is_enforce = (r.mode == CCS_CONFIG_ENFORCING);
++ error = -ENOMEM;
++ if (!ccs_get_realpath(&buf1, &obj.path1) ||
++ !ccs_get_realpath(&buf2, &obj.path2))
++ goto out;
++ switch (operation) {
++ case CCS_TYPE_RENAME:
++ case CCS_TYPE_LINK:
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 0)
++ if (!d_is_dir(dentry1))
++ break;
++#else
++ if (!dentry1->d_inode || !S_ISDIR(dentry1->d_inode->i_mode))
++ break;
++#endif
++ /* fall through */
++ case CCS_TYPE_PIVOT_ROOT:
++ ccs_add_slash(&buf1);
++ ccs_add_slash(&buf2);
++ break;
++ }
++ r.obj = &obj;
++ r.param_type = CCS_TYPE_PATH2_ACL;
++ r.param.path2.operation = operation;
++ r.param.path2.filename1 = &buf1;
++ r.param.path2.filename2 = &buf2;
++ error = ccs_check_acl(&r);
++out:
++ kfree(buf1.name);
++ kfree(buf2.name);
++ ccs_read_unlock(idx);
++ if (!is_enforce)
++ error = 0;
++ return error;
++}
++
++/**
++ * ccs_path_number_perm - Check permission for "create", "mkdir", "mkfifo", "mksock", "ioctl", "chmod", "chown", "chgrp".
++ *
++ * @type: Type of operation.
++ * @dentry: Pointer to "struct dentry".
++ * @vfsmnt: Pointer to "struct vfsmount". Maybe NULL.
++ * @number: Number.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_path_number_perm(const u8 type, struct dentry *dentry,
++ struct vfsmount *vfsmnt, unsigned long number)
++{
++ struct ccs_request_info r;
++ struct ccs_obj_info obj = {
++ .path1.dentry = dentry,
++ .path1.mnt = vfsmnt,
++ };
++ int error = 0;
++ struct ccs_path_info buf;
++ int idx;
++ if (!dentry)
++ return 0;
++ idx = ccs_read_lock();
++ if (ccs_init_request_info(&r, ccs_pn2mac[type]) == CCS_CONFIG_DISABLED)
++ goto out;
++ error = -ENOMEM;
++ if (!ccs_get_realpath(&buf, &obj.path1))
++ goto out;
++ r.obj = &obj;
++ if (type == CCS_TYPE_MKDIR)
++ ccs_add_slash(&buf);
++ r.param_type = CCS_TYPE_PATH_NUMBER_ACL;
++ r.param.path_number.operation = type;
++ r.param.path_number.filename = &buf;
++ r.param.path_number.number = number;
++ error = ccs_check_acl(&r);
++ kfree(buf.name);
++out:
++ ccs_read_unlock(idx);
++ if (r.mode != CCS_CONFIG_ENFORCING)
++ error = 0;
++ return error;
++}
++
++/**
++ * __ccs_ioctl_permission - Check permission for "ioctl".
++ *
++ * @filp: Pointer to "struct file".
++ * @cmd: Ioctl command number.
++ * @arg: Param for @cmd.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_ioctl_permission(struct file *filp, unsigned int cmd,
++ unsigned long arg)
++{
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
++ return ccs_path_number_perm(CCS_TYPE_IOCTL, filp->f_path.dentry,
++ filp->f_path.mnt, cmd);
++#else
++ return ccs_path_number_perm(CCS_TYPE_IOCTL, filp->f_dentry,
++ filp->f_vfsmnt, cmd);
++#endif
++}
++
++/**
++ * __ccs_chmod_permission - Check permission for "chmod".
++ *
++ * @dentry: Pointer to "struct dentry".
++ * @vfsmnt: Pointer to "struct vfsmount". Maybe NULL.
++ * @mode: Mode.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_chmod_permission(struct dentry *dentry,
++ struct vfsmount *vfsmnt, mode_t mode)
++{
++ return ccs_path_number_perm(CCS_TYPE_CHMOD, dentry, vfsmnt,
++ mode & S_IALLUGO);
++}
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 5, 0)
++
++/**
++ * __ccs_chown_permission - Check permission for "chown/chgrp".
++ *
++ * @dentry: Pointer to "struct dentry".
++ * @vfsmnt: Pointer to "struct vfsmount". Maybe NULL.
++ * @user: User ID.
++ * @group: Group ID.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_chown_permission(struct dentry *dentry,
++ struct vfsmount *vfsmnt, kuid_t user,
++ kgid_t group)
++{
++ int error = 0;
++ if (uid_valid(user))
++ error = ccs_path_number_perm(CCS_TYPE_CHOWN, dentry, vfsmnt,
++ from_kuid(&init_user_ns, user));
++ if (!error && gid_valid(group))
++ error = ccs_path_number_perm(CCS_TYPE_CHGRP, dentry, vfsmnt,
++ from_kgid(&init_user_ns, group));
++ return error;
++}
++
++#else
++
++/**
++ * __ccs_chown_permission - Check permission for "chown/chgrp".
++ *
++ * @dentry: Pointer to "struct dentry".
++ * @vfsmnt: Pointer to "struct vfsmount". Maybe NULL.
++ * @user: User ID.
++ * @group: Group ID.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_chown_permission(struct dentry *dentry,
++ struct vfsmount *vfsmnt, uid_t user,
++ gid_t group)
++{
++ int error = 0;
++ if (user == (uid_t) -1 && group == (gid_t) -1)
++ return 0;
++ if (user != (uid_t) -1)
++ error = ccs_path_number_perm(CCS_TYPE_CHOWN, dentry, vfsmnt,
++ user);
++ if (!error && group != (gid_t) -1)
++ error = ccs_path_number_perm(CCS_TYPE_CHGRP, dentry, vfsmnt,
++ group);
++ return error;
++}
++
++#endif
++
++/**
++ * __ccs_fcntl_permission - Check permission for changing O_APPEND flag.
++ *
++ * @file: Pointer to "struct file".
++ * @cmd: Command number.
++ * @arg: Value for @cmd.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_fcntl_permission(struct file *file, unsigned int cmd,
++ unsigned long arg)
++{
++ if (!(cmd == F_SETFL && ((arg ^ file->f_flags) & O_APPEND)))
++ return 0;
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 33)
++ return __ccs_open_permission(file->f_path.dentry, file->f_path.mnt,
++ O_WRONLY | (arg & O_APPEND));
++#elif defined(RHEL_MAJOR) && RHEL_MAJOR == 6
++ return __ccs_open_permission(file->f_dentry, file->f_vfsmnt,
++ O_WRONLY | (arg & O_APPEND));
++#else
++ return __ccs_open_permission(file->f_dentry, file->f_vfsmnt,
++ (O_WRONLY + 1) | (arg & O_APPEND));
++#endif
++}
++
++/**
++ * __ccs_pivot_root_permission - Check permission for pivot_root().
++ *
++ * @old_path: Pointer to "struct path".
++ * @new_path: Pointer to "struct path".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_pivot_root_permission(struct path *old_path,
++ struct path *new_path)
++{
++ return ccs_path2_perm(CCS_TYPE_PIVOT_ROOT, new_path->dentry,
++ new_path->mnt, old_path->dentry, old_path->mnt);
++}
++
++/**
++ * __ccs_chroot_permission - Check permission for chroot().
++ *
++ * @path: Pointer to "struct path".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_chroot_permission(struct path *path)
++{
++ return ccs_path_perm(CCS_TYPE_CHROOT, path->dentry, path->mnt, NULL);
++}
++
++/**
++ * __ccs_umount_permission - Check permission for unmount.
++ *
++ * @mnt: Pointer to "struct vfsmount".
++ * @flags: Unused.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_umount_permission(struct vfsmount *mnt, int flags)
++{
++ return ccs_path_perm(CCS_TYPE_UMOUNT, mnt->mnt_root, mnt, NULL);
++}
++
++/**
++ * __ccs_mknod_permission - Check permission for vfs_mknod().
++ *
++ * @dentry: Pointer to "struct dentry".
++ * @mnt: Pointer to "struct vfsmount". Maybe NULL.
++ * @mode: Device type and permission.
++ * @dev: Device number for block or character device.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_mknod_permission(struct dentry *dentry, struct vfsmount *mnt,
++ const unsigned int mode, unsigned int dev)
++{
++ int error = 0;
++ const unsigned int perm = mode & S_IALLUGO;
++ switch (mode & S_IFMT) {
++ case S_IFCHR:
++ error = ccs_mkdev_perm(CCS_TYPE_MKCHAR, dentry, mnt, perm,
++ dev);
++ break;
++ case S_IFBLK:
++ error = ccs_mkdev_perm(CCS_TYPE_MKBLOCK, dentry, mnt, perm,
++ dev);
++ break;
++ case S_IFIFO:
++ error = ccs_path_number_perm(CCS_TYPE_MKFIFO, dentry, mnt,
++ perm);
++ break;
++ case S_IFSOCK:
++ error = ccs_path_number_perm(CCS_TYPE_MKSOCK, dentry, mnt,
++ perm);
++ break;
++ case 0:
++ case S_IFREG:
++ error = ccs_path_number_perm(CCS_TYPE_CREATE, dentry, mnt,
++ perm);
++ break;
++ }
++ return error;
++}
++
++/**
++ * __ccs_mkdir_permission - Check permission for vfs_mkdir().
++ *
++ * @dentry: Pointer to "struct dentry".
++ * @mnt: Pointer to "struct vfsmount". Maybe NULL.
++ * @mode: Create mode.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_mkdir_permission(struct dentry *dentry, struct vfsmount *mnt,
++ unsigned int mode)
++{
++ return ccs_path_number_perm(CCS_TYPE_MKDIR, dentry, mnt, mode);
++}
++
++/**
++ * __ccs_rmdir_permission - Check permission for vfs_rmdir().
++ *
++ * @dentry: Pointer to "struct dentry".
++ * @mnt: Pointer to "struct vfsmount". Maybe NULL.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_rmdir_permission(struct dentry *dentry, struct vfsmount *mnt)
++{
++ return ccs_path_perm(CCS_TYPE_RMDIR, dentry, mnt, NULL);
++}
++
++/**
++ * __ccs_unlink_permission - Check permission for vfs_unlink().
++ *
++ * @dentry: Pointer to "struct dentry".
++ * @mnt: Pointer to "struct vfsmount". Maybe NULL.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_unlink_permission(struct dentry *dentry, struct vfsmount *mnt)
++{
++ return ccs_path_perm(CCS_TYPE_UNLINK, dentry, mnt, NULL);
++}
++
++#ifdef CONFIG_CCSECURITY_FILE_GETATTR
++
++/**
++ * __ccs_getattr_permission - Check permission for vfs_getattr().
++ *
++ * @mnt: Pointer to "struct vfsmount". Maybe NULL.
++ * @dentry: Pointer to "struct dentry".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_getattr_permission(struct vfsmount *mnt,
++ struct dentry *dentry)
++{
++ return ccs_path_perm(CCS_TYPE_GETATTR, dentry, mnt, NULL);
++}
++
++#endif
++
++/**
++ * __ccs_symlink_permission - Check permission for vfs_symlink().
++ *
++ * @dentry: Pointer to "struct dentry".
++ * @mnt: Pointer to "struct vfsmount". Maybe NULL.
++ * @from: Content of symlink.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_symlink_permission(struct dentry *dentry,
++ struct vfsmount *mnt, const char *from)
++{
++ return ccs_path_perm(CCS_TYPE_SYMLINK, dentry, mnt, from);
++}
++
++/**
++ * __ccs_truncate_permission - Check permission for notify_change().
++ *
++ * @dentry: Pointer to "struct dentry".
++ * @mnt: Pointer to "struct vfsmount". Maybe NULL.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_truncate_permission(struct dentry *dentry,
++ struct vfsmount *mnt)
++{
++ return ccs_path_perm(CCS_TYPE_TRUNCATE, dentry, mnt, NULL);
++}
++
++/**
++ * __ccs_rename_permission - Check permission for vfs_rename().
++ *
++ * @old_dentry: Pointer to "struct dentry".
++ * @new_dentry: Pointer to "struct dentry".
++ * @mnt: Pointer to "struct vfsmount". Maybe NULL.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_rename_permission(struct dentry *old_dentry,
++ struct dentry *new_dentry,
++ struct vfsmount *mnt)
++{
++ return ccs_path2_perm(CCS_TYPE_RENAME, old_dentry, mnt, new_dentry,
++ mnt);
++}
++
++/**
++ * __ccs_link_permission - Check permission for vfs_link().
++ *
++ * @old_dentry: Pointer to "struct dentry".
++ * @new_dentry: Pointer to "struct dentry".
++ * @mnt: Pointer to "struct vfsmount". Maybe NULL.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_link_permission(struct dentry *old_dentry,
++ struct dentry *new_dentry,
++ struct vfsmount *mnt)
++{
++ return ccs_path2_perm(CCS_TYPE_LINK, old_dentry, mnt, new_dentry, mnt);
++}
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30)
++
++/**
++ * __ccs_open_exec_permission - Check permission for open_exec().
++ *
++ * @dentry: Pointer to "struct dentry".
++ * @mnt: Pointer to "struct vfsmount".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_open_exec_permission(struct dentry *dentry,
++ struct vfsmount *mnt)
++{
++ return (ccs_current_flags() & CCS_TASK_IS_IN_EXECVE) ?
++ __ccs_open_permission(dentry, mnt, O_RDONLY + 1) : 0;
++}
++
++/**
++ * __ccs_uselib_permission - Check permission for sys_uselib().
++ *
++ * @dentry: Pointer to "struct dentry".
++ * @mnt: Pointer to "struct vfsmount".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_uselib_permission(struct dentry *dentry, struct vfsmount *mnt)
++{
++ return __ccs_open_permission(dentry, mnt, O_RDONLY + 1);
++}
++
++#endif
++
++#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 18) || (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33) && defined(CONFIG_SYSCTL_SYSCALL))
++
++/**
++ * __ccs_parse_table - Check permission for parse_table().
++ *
++ * @name: Pointer to "int __user".
++ * @nlen: Number of elements in @name.
++ * @oldval: Pointer to "void __user".
++ * @newval: Pointer to "void __user".
++ * @table: Pointer to "struct ctl_table".
++ *
++ * Returns 0 on success, negative value otherwise.
++ *
++ * Note that this function is racy because this function checks values in
++ * userspace memory which could be changed after permission check.
++ */
++static int __ccs_parse_table(int __user *name, int nlen, void __user *oldval,
++ void __user *newval, struct ctl_table *table)
++{
++ int n;
++ int error = -ENOMEM;
++ int op = 0;
++ struct ccs_path_info buf;
++ char *buffer = NULL;
++ struct ccs_request_info r;
++ int idx;
++ if (oldval)
++ op |= 004;
++ if (newval)
++ op |= 002;
++ if (!op) /* Neither read nor write */
++ return 0;
++ idx = ccs_read_lock();
++ if (ccs_init_request_info(&r, CCS_MAC_FILE_OPEN)
++ == CCS_CONFIG_DISABLED) {
++ error = 0;
++ goto out;
++ }
++ buffer = kmalloc(PAGE_SIZE, CCS_GFP_FLAGS);
++ if (!buffer)
++ goto out;
++ snprintf(buffer, PAGE_SIZE - 1, "proc:/sys");
++repeat:
++ if (!nlen) {
++ error = -ENOTDIR;
++ goto out;
++ }
++ if (get_user(n, name)) {
++ error = -EFAULT;
++ goto out;
++ }
++ for ( ; table->ctl_name
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 21)
++ || table->procname
++#endif
++ ; table++) {
++ int pos;
++ const char *cp;
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 21)
++ if (n != table->ctl_name && table->ctl_name != CTL_ANY)
++ continue;
++#else
++ if (!n || n != table->ctl_name)
++ continue;
++#endif
++ pos = strlen(buffer);
++ cp = table->procname;
++ error = -ENOMEM;
++ if (cp) {
++ int len = strlen(cp);
++ if (len + 2 > PAGE_SIZE - 1)
++ goto out;
++ buffer[pos++] = '/';
++ memmove(buffer + pos, cp, len + 1);
++ } else {
++ /* Assume nobody assigns "=\$=" for procname. */
++ snprintf(buffer + pos, PAGE_SIZE - pos - 1,
++ "/=%d=", table->ctl_name);
++ if (!memchr(buffer, '\0', PAGE_SIZE - 2))
++ goto out;
++ }
++ if (!table->child)
++ goto no_child;
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 21)
++ if (!table->strategy)
++ goto no_strategy;
++ /* printk("sysctl='%s'\n", buffer); */
++ buf.name = ccs_encode(buffer);
++ if (!buf.name)
++ goto out;
++ ccs_fill_path_info(&buf);
++ if (op & MAY_READ)
++ error = ccs_path_permission(&r, CCS_TYPE_READ, &buf);
++ else
++ error = 0;
++ if (!error && (op & MAY_WRITE))
++ error = ccs_path_permission(&r, CCS_TYPE_WRITE, &buf);
++ kfree(buf.name);
++ if (error)
++ goto out;
++no_strategy:
++#endif
++ name++;
++ nlen--;
++ table = table->child;
++ goto repeat;
++no_child:
++ /* printk("sysctl='%s'\n", buffer); */
++ buf.name = ccs_encode(buffer);
++ if (!buf.name)
++ goto out;
++ ccs_fill_path_info(&buf);
++ if (op & MAY_READ)
++ error = ccs_path_permission(&r, CCS_TYPE_READ, &buf);
++ else
++ error = 0;
++ if (!error && (op & MAY_WRITE))
++ error = ccs_path_permission(&r, CCS_TYPE_WRITE, &buf);
++ kfree(buf.name);
++ goto out;
++ }
++ error = -ENOTDIR;
++out:
++ ccs_read_unlock(idx);
++ kfree(buffer);
++ return error;
++}
++
++#endif
++
++#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 24)
++
++/**
++ * ccs_old_pivot_root_permission - Check permission for pivot_root().
++ *
++ * @old_nd: Pointer to "struct nameidata".
++ * @new_nd: Pointer to "struct nameidata".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_old_pivot_root_permission(struct nameidata *old_nd,
++ struct nameidata *new_nd)
++{
++ struct path old_path = { old_nd->mnt, old_nd->dentry };
++ struct path new_path = { new_nd->mnt, new_nd->dentry };
++ return __ccs_pivot_root_permission(&old_path, &new_path);
++}
++
++/**
++ * ccs_old_chroot_permission - Check permission for chroot().
++ *
++ * @nd: Pointer to "struct nameidata".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_old_chroot_permission(struct nameidata *nd)
++{
++ struct path path = { nd->mnt, nd->dentry };
++ return __ccs_chroot_permission(&path);
++}
++
++#endif
++
++#ifdef CONFIG_CCSECURITY_NETWORK
++
++/**
++ * ccs_address_matches_group - Check whether the given address matches members of the given address group.
++ *
++ * @is_ipv6: True if @address is an IPv6 address.
++ * @address: An IPv4 or IPv6 address.
++ * @group: Pointer to "struct ccs_address_group".
++ *
++ * Returns true if @address matches addresses in @group group, false otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static bool ccs_address_matches_group(const bool is_ipv6, const u32 *address,
++ const struct ccs_group *group)
++{
++ struct ccs_address_group *member;
++ bool matched = false;
++ const u8 size = is_ipv6 ? 16 : 4;
++ list_for_each_entry_srcu(member, &group->member_list, head.list,
++ &ccs_ss) {
++ if (member->head.is_deleted)
++ continue;
++ if (member->address.is_ipv6 != is_ipv6)
++ continue;
++ if (memcmp(&member->address.ip[0], address, size) > 0 ||
++ memcmp(address, &member->address.ip[1], size) > 0)
++ continue;
++ matched = true;
++ break;
++ }
++ return matched;
++}
++
++/**
++ * ccs_check_inet_acl - Check permission for inet domain socket operation.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ * @ptr: Pointer to "struct ccs_acl_info".
++ *
++ * Returns true if granted, false otherwise.
++ */
++static bool ccs_check_inet_acl(struct ccs_request_info *r,
++ const struct ccs_acl_info *ptr)
++{
++ const struct ccs_inet_acl *acl = container_of(ptr, typeof(*acl), head);
++ const u8 size = r->param.inet_network.is_ipv6 ? 16 : 4;
++ if (!(ptr->perm & (1 << r->param.inet_network.operation)) ||
++ !ccs_compare_number_union(r->param.inet_network.port, &acl->port))
++ return false;
++ if (acl->address.group)
++ return ccs_address_matches_group(r->param.inet_network.is_ipv6,
++ r->param.inet_network.address,
++ acl->address.group);
++ return acl->address.is_ipv6 == r->param.inet_network.is_ipv6 &&
++ memcmp(&acl->address.ip[0],
++ r->param.inet_network.address, size) <= 0 &&
++ memcmp(r->param.inet_network.address,
++ &acl->address.ip[1], size) <= 0;
++}
++
++/**
++ * ccs_check_unix_acl - Check permission for unix domain socket operation.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ * @ptr: Pointer to "struct ccs_acl_info".
++ *
++ * Returns true if granted, false otherwise.
++ */
++static bool ccs_check_unix_acl(struct ccs_request_info *r,
++ const struct ccs_acl_info *ptr)
++{
++ const struct ccs_unix_acl *acl = container_of(ptr, typeof(*acl), head);
++ return (ptr->perm & (1 << r->param.unix_network.operation)) &&
++ ccs_compare_name_union(r->param.unix_network.address,
++ &acl->name);
++}
++
++/**
++ * ccs_inet_entry - Check permission for INET network operation.
++ *
++ * @address: Pointer to "struct ccs_addr_info".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_inet_entry(const struct ccs_addr_info *address)
++{
++ const int idx = ccs_read_lock();
++ struct ccs_request_info r;
++ int error = 0;
++ const u8 type = ccs_inet2mac[address->protocol][address->operation];
++ if (type && ccs_init_request_info(&r, type) != CCS_CONFIG_DISABLED) {
++ r.param_type = CCS_TYPE_INET_ACL;
++ r.param.inet_network.protocol = address->protocol;
++ r.param.inet_network.operation = address->operation;
++ r.param.inet_network.is_ipv6 = address->inet.is_ipv6;
++ r.param.inet_network.address = address->inet.address;
++ r.param.inet_network.port = ntohs(address->inet.port);
++ r.dont_sleep_on_enforce_error =
++ address->operation == CCS_NETWORK_ACCEPT
++#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
++ || address->operation == CCS_NETWORK_RECV
++#endif
++ ;
++ error = ccs_check_acl(&r);
++ }
++ ccs_read_unlock(idx);
++ return error;
++}
++
++/**
++ * ccs_check_inet_address - Check permission for inet domain socket's operation.
++ *
++ * @addr: Pointer to "struct sockaddr".
++ * @addr_len: Size of @addr.
++ * @port: Port number.
++ * @address: Pointer to "struct ccs_addr_info".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_check_inet_address(const struct sockaddr *addr,
++ const unsigned int addr_len, const u16 port,
++ struct ccs_addr_info *address)
++{
++ struct ccs_inet_addr_info *i = &address->inet;
++ switch (addr->sa_family) {
++ case AF_INET6:
++ if (addr_len < SIN6_LEN_RFC2133)
++ goto skip;
++ i->is_ipv6 = true;
++ i->address = (u32 *)
++ ((struct sockaddr_in6 *) addr)->sin6_addr.s6_addr;
++ i->port = ((struct sockaddr_in6 *) addr)->sin6_port;
++ break;
++ case AF_INET:
++ if (addr_len < sizeof(struct sockaddr_in))
++ goto skip;
++ i->is_ipv6 = false;
++ i->address = (u32 *) &((struct sockaddr_in *) addr)->sin_addr;
++ i->port = ((struct sockaddr_in *) addr)->sin_port;
++ break;
++ default:
++ goto skip;
++ }
++ if (address->protocol == SOCK_RAW)
++ i->port = htons(port);
++ return ccs_inet_entry(address);
++skip:
++ return 0;
++}
++
++/**
++ * ccs_unix_entry - Check permission for UNIX network operation.
++ *
++ * @address: Pointer to "struct ccs_addr_info".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_unix_entry(const struct ccs_addr_info *address)
++{
++ const int idx = ccs_read_lock();
++ struct ccs_request_info r;
++ int error = 0;
++ const u8 type = ccs_unix2mac[address->protocol][address->operation];
++ if (type && ccs_init_request_info(&r, type) != CCS_CONFIG_DISABLED) {
++ char *buf = address->unix0.addr;
++ int len = address->unix0.addr_len - sizeof(sa_family_t);
++ if (len <= 0) {
++ buf = "anonymous";
++ len = 9;
++ } else if (buf[0]) {
++ len = strnlen(buf, len);
++ }
++ buf = ccs_encode2(buf, len);
++ if (buf) {
++ struct ccs_path_info addr;
++ addr.name = buf;
++ ccs_fill_path_info(&addr);
++ r.param_type = CCS_TYPE_UNIX_ACL;
++ r.param.unix_network.protocol = address->protocol;
++ r.param.unix_network.operation = address->operation;
++ r.param.unix_network.address = &addr;
++ r.dont_sleep_on_enforce_error =
++ address->operation == CCS_NETWORK_ACCEPT
++#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
++ || address->operation == CCS_NETWORK_RECV
++#endif
++ ;
++ error = ccs_check_acl(&r);
++ kfree(buf);
++ } else
++ error = -ENOMEM;
++ }
++ ccs_read_unlock(idx);
++ return error;
++}
++
++/**
++ * ccs_check_unix_address - Check permission for unix domain socket's operation.
++ *
++ * @addr: Pointer to "struct sockaddr".
++ * @addr_len: Size of @addr.
++ * @address: Pointer to "struct ccs_addr_info".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_check_unix_address(struct sockaddr *addr,
++ const unsigned int addr_len,
++ struct ccs_addr_info *address)
++{
++ struct ccs_unix_addr_info *u = &address->unix0;
++ if (addr->sa_family != AF_UNIX)
++ return 0;
++ u->addr = ((struct sockaddr_un *) addr)->sun_path;
++ u->addr_len = addr_len;
++ return ccs_unix_entry(address);
++}
++
++/**
++ * ccs_sock_family - Get socket's family.
++ *
++ * @sk: Pointer to "struct sock".
++ *
++ * Returns one of PF_INET, PF_INET6, PF_UNIX or 0.
++ */
++static u8 ccs_sock_family(struct sock *sk)
++{
++ u8 family;
++ if (ccs_kernel_service())
++ return 0;
++ family = sk->sk_family;
++ switch (family) {
++ case PF_INET:
++ case PF_INET6:
++ case PF_UNIX:
++ return family;
++ default:
++ return 0;
++ }
++}
++
++/**
++ * __ccs_socket_listen_permission - Check permission for listening a socket.
++ *
++ * @sock: Pointer to "struct socket".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_socket_listen_permission(struct socket *sock)
++{
++ struct ccs_addr_info address;
++ const u8 family = ccs_sock_family(sock->sk);
++ const unsigned int type = sock->type;
++ struct sockaddr_storage addr;
++ int addr_len;
++ if (!family || (type != SOCK_STREAM && type != SOCK_SEQPACKET))
++ return 0;
++ {
++ const int error = sock->ops->getname(sock, (struct sockaddr *)
++ &addr, &addr_len, 0);
++ if (error)
++ return error;
++ }
++ address.protocol = type;
++ address.operation = CCS_NETWORK_LISTEN;
++ if (family == PF_UNIX)
++ return ccs_check_unix_address((struct sockaddr *) &addr,
++ addr_len, &address);
++ return ccs_check_inet_address((struct sockaddr *) &addr, addr_len, 0,
++ &address);
++}
++
++/**
++ * __ccs_socket_connect_permission - Check permission for setting the remote address of a socket.
++ *
++ * @sock: Pointer to "struct socket".
++ * @addr: Pointer to "struct sockaddr".
++ * @addr_len: Size of @addr.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_socket_connect_permission(struct socket *sock,
++ struct sockaddr *addr, int addr_len)
++{
++ struct ccs_addr_info address;
++ const u8 family = ccs_sock_family(sock->sk);
++ const unsigned int type = sock->type;
++ if (!family)
++ return 0;
++ address.protocol = type;
++ switch (type) {
++ case SOCK_DGRAM:
++ case SOCK_RAW:
++ address.operation = CCS_NETWORK_SEND;
++ break;
++ case SOCK_STREAM:
++ case SOCK_SEQPACKET:
++ address.operation = CCS_NETWORK_CONNECT;
++ break;
++ default:
++ return 0;
++ }
++ if (family == PF_UNIX)
++ return ccs_check_unix_address(addr, addr_len, &address);
++ return ccs_check_inet_address(addr, addr_len, sock->sk->sk_protocol,
++ &address);
++}
++
++/**
++ * __ccs_socket_bind_permission - Check permission for setting the local address of a socket.
++ *
++ * @sock: Pointer to "struct socket".
++ * @addr: Pointer to "struct sockaddr".
++ * @addr_len: Size of @addr.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_socket_bind_permission(struct socket *sock,
++ struct sockaddr *addr, int addr_len)
++{
++ struct ccs_addr_info address;
++ const u8 family = ccs_sock_family(sock->sk);
++ const unsigned int type = sock->type;
++ if (!family)
++ return 0;
++ switch (type) {
++ case SOCK_STREAM:
++ case SOCK_DGRAM:
++ case SOCK_RAW:
++ case SOCK_SEQPACKET:
++ address.protocol = type;
++ address.operation = CCS_NETWORK_BIND;
++ break;
++ default:
++ return 0;
++ }
++ if (family == PF_UNIX)
++ return ccs_check_unix_address(addr, addr_len, &address);
++ return ccs_check_inet_address(addr, addr_len, sock->sk->sk_protocol,
++ &address);
++}
++
++/**
++ * __ccs_socket_sendmsg_permission - Check permission for sending a datagram.
++ *
++ * @sock: Pointer to "struct socket".
++ * @msg: Pointer to "struct msghdr".
++ * @size: Unused.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_socket_sendmsg_permission(struct socket *sock,
++ struct msghdr *msg, int size)
++{
++ struct ccs_addr_info address;
++ const u8 family = ccs_sock_family(sock->sk);
++ const unsigned int type = sock->type;
++ if (!msg->msg_name || !family ||
++ (type != SOCK_DGRAM && type != SOCK_RAW))
++ return 0;
++ address.protocol = type;
++ address.operation = CCS_NETWORK_SEND;
++ if (family == PF_UNIX)
++ return ccs_check_unix_address((struct sockaddr *)
++ msg->msg_name, msg->msg_namelen,
++ &address);
++ return ccs_check_inet_address((struct sockaddr *) msg->msg_name,
++ msg->msg_namelen, sock->sk->sk_protocol,
++ &address);
++}
++
++/**
++ * __ccs_socket_post_accept_permission - Check permission for accepting a socket.
++ *
++ * @sock: Pointer to "struct socket".
++ * @newsock: Pointer to "struct socket".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_socket_post_accept_permission(struct socket *sock,
++ struct socket *newsock)
++{
++ struct ccs_addr_info address;
++ const u8 family = ccs_sock_family(sock->sk);
++ const unsigned int type = sock->type;
++ struct sockaddr_storage addr;
++ int addr_len;
++ if (!family || (type != SOCK_STREAM && type != SOCK_SEQPACKET))
++ return 0;
++ {
++ const int error = newsock->ops->getname(newsock,
++ (struct sockaddr *)
++ &addr, &addr_len, 2);
++ if (error)
++ return error;
++ }
++ address.protocol = type;
++ address.operation = CCS_NETWORK_ACCEPT;
++ if (family == PF_UNIX)
++ return ccs_check_unix_address((struct sockaddr *) &addr,
++ addr_len, &address);
++ return ccs_check_inet_address((struct sockaddr *) &addr, addr_len, 0,
++ &address);
++}
++
++#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
++
++/**
++ * __ccs_socket_post_recvmsg_permission - Check permission for receiving a datagram.
++ *
++ * @sk: Pointer to "struct sock".
++ * @skb: Pointer to "struct sk_buff".
++ * @flags: Flags passed to skb_recv_datagram().
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_socket_post_recvmsg_permission(struct sock *sk,
++ struct sk_buff *skb, int flags)
++{
++ struct ccs_addr_info address;
++ const u8 family = ccs_sock_family(sk);
++ const unsigned int type = sk->sk_type;
++ struct sockaddr_storage addr;
++ if (!family)
++ return 0;
++ switch (type) {
++ case SOCK_DGRAM:
++ case SOCK_RAW:
++ address.protocol = type;
++ break;
++ default:
++ return 0;
++ }
++ address.operation = CCS_NETWORK_RECV;
++ switch (family) {
++ case PF_INET6:
++ {
++ struct in6_addr *sin6 = (struct in6_addr *) &addr;
++ address.inet.is_ipv6 = true;
++ if (type == SOCK_DGRAM &&
++ skb->protocol == htons(ETH_P_IP))
++ ipv6_addr_set(sin6, 0, 0, htonl(0xffff),
++ ip_hdr(skb)->saddr);
++ else
++ *sin6 = ipv6_hdr(skb)->saddr;
++ break;
++ }
++ case PF_INET:
++ {
++ struct in_addr *sin4 = (struct in_addr *) &addr;
++ address.inet.is_ipv6 = false;
++ sin4->s_addr = ip_hdr(skb)->saddr;
++ break;
++ }
++ default: /* == PF_UNIX */
++ {
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0)
++ struct unix_address *u = unix_sk(skb->sk)->addr;
++#else
++ struct unix_address *u =
++ skb->sk->protinfo.af_unix.addr;
++#endif
++ unsigned int addr_len;
++ if (u && u->len <= sizeof(addr)) {
++ addr_len = u->len;
++ memcpy(&addr, u->name, addr_len);
++ } else {
++ addr_len = 0;
++ addr.ss_family = AF_UNIX;
++ }
++ if (ccs_check_unix_address((struct sockaddr *) &addr,
++ addr_len, &address))
++ goto out;
++ return 0;
++ }
++ }
++ address.inet.address = (u32 *) &addr;
++ if (type == SOCK_DGRAM)
++ address.inet.port = udp_hdr(skb)->source;
++ else
++ address.inet.port = htons(sk->sk_protocol);
++ if (ccs_inet_entry(&address))
++ goto out;
++ return 0;
++out:
++ /*
++ * Remove from queue if MSG_PEEK is used so that
++ * the head message from unwanted source in receive queue will not
++ * prevent the caller from picking up next message from wanted source
++ * when the caller is using MSG_PEEK flag for picking up.
++ */
++ {
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 35)
++ bool slow = false;
++ if (type == SOCK_DGRAM && family != PF_UNIX)
++ slow = lock_sock_fast(sk);
++#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
++ if (type == SOCK_DGRAM && family != PF_UNIX)
++ lock_sock(sk);
++#elif defined(RHEL_MAJOR) && RHEL_MAJOR == 5 && defined(RHEL_MINOR) && RHEL_MINOR >= 2
++ if (type == SOCK_DGRAM && family != PF_UNIX)
++ lock_sock(sk);
++#endif
++ skb_kill_datagram(sk, skb, flags);
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 35)
++ if (type == SOCK_DGRAM && family != PF_UNIX)
++ unlock_sock_fast(sk, slow);
++#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
++ if (type == SOCK_DGRAM && family != PF_UNIX)
++ release_sock(sk);
++#elif defined(RHEL_MAJOR) && RHEL_MAJOR == 5 && defined(RHEL_MINOR) && RHEL_MINOR >= 2
++ if (type == SOCK_DGRAM && family != PF_UNIX)
++ release_sock(sk);
++#endif
++ }
++ return -EPERM;
++}
++
++#endif
++
++#endif
++
++#if defined(CONFIG_CCSECURITY_CAPABILITY) || defined(CONFIG_CCSECURITY_NETWORK)
++
++/**
++ * ccs_kernel_service - Check whether I'm kernel service or not.
++ *
++ * Returns true if I'm kernel service, false otherwise.
++ */
++static bool ccs_kernel_service(void)
++{
++ /* Nothing to do if I am a kernel service. */
++ return segment_eq(get_fs(), KERNEL_DS);
++}
++
++#endif
++
++#ifdef CONFIG_CCSECURITY_CAPABILITY
++
++/**
++ * ccs_check_capability_acl - Check permission for capability operation.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ * @ptr: Pointer to "struct ccs_acl_info".
++ *
++ * Returns true if granted, false otherwise.
++ */
++static bool ccs_check_capability_acl(struct ccs_request_info *r,
++ const struct ccs_acl_info *ptr)
++{
++ const struct ccs_capability_acl *acl =
++ container_of(ptr, typeof(*acl), head);
++ return acl->operation == r->param.capability.operation;
++}
++
++/**
++ * ccs_capable - Check permission for capability.
++ *
++ * @operation: Type of operation.
++ *
++ * Returns true on success, false otherwise.
++ */
++static bool __ccs_capable(const u8 operation)
++{
++ struct ccs_request_info r;
++ int error = 0;
++ const int idx = ccs_read_lock();
++ if (ccs_init_request_info(&r, ccs_c2mac[operation])
++ != CCS_CONFIG_DISABLED) {
++ r.param_type = CCS_TYPE_CAPABILITY_ACL;
++ r.param.capability.operation = operation;
++ error = ccs_check_acl(&r);
++ }
++ ccs_read_unlock(idx);
++ return !error;
++}
++
++/**
++ * __ccs_socket_create_permission - Check permission for creating a socket.
++ *
++ * @family: Protocol family.
++ * @type: Unused.
++ * @protocol: Unused.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __ccs_socket_create_permission(int family, int type, int protocol)
++{
++ if (ccs_kernel_service())
++ return 0;
++ if (family == PF_PACKET && !ccs_capable(CCS_USE_PACKET_SOCKET))
++ return -EPERM;
++ if (family == PF_ROUTE && !ccs_capable(CCS_USE_ROUTE_SOCKET))
++ return -EPERM;
++ return 0;
++}
++
++/**
++ * __ccs_ptrace_permission - Check permission for ptrace().
++ *
++ * @request: Unused.
++ * @pid: Unused.
++ *
++ * Returns 0 on success, negative value otherwise.
++ *
++ * Since this function is called from location where it is permitted to sleep,
++ * it is racy to check target process's domainname anyway. Therefore, we don't
++ * use target process's domainname.
++ */
++static int __ccs_ptrace_permission(long request, long pid)
++{
++ return __ccs_capable(CCS_SYS_PTRACE) ? 0 : -EPERM;
++}
++
++#endif
++
++#ifdef CONFIG_CCSECURITY_IPC
++
++/**
++ * ccs_check_signal_acl - Check permission for signal operation.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ * @ptr: Pointer to "struct ccs_acl_info".
++ *
++ * Returns true if granted, false otherwise.
++ */
++static bool ccs_check_signal_acl(struct ccs_request_info *r,
++ const struct ccs_acl_info *ptr)
++{
++ const struct ccs_signal_acl *acl =
++ container_of(ptr, typeof(*acl), head);
++ if (ccs_compare_number_union(r->param.signal.sig, &acl->sig)) {
++ const int len = acl->domainname->total_len;
++ if (!strncmp(acl->domainname->name,
++ r->param.signal.dest_pattern, len)) {
++ switch (r->param.signal.dest_pattern[len]) {
++ case ' ':
++ case '\0':
++ return true;
++ }
++ }
++ }
++ return false;
++}
++
++/**
++ * ccs_signal_acl2 - Check permission for signal.
++ *
++ * @sig: Signal number.
++ * @pid: Target's PID.
++ *
++ * Returns 0 on success, negative value otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static int ccs_signal_acl2(const int sig, const int pid)
++{
++ struct ccs_request_info r;
++ struct ccs_domain_info *dest = NULL;
++ const struct ccs_domain_info * const domain = ccs_current_domain();
++ if (ccs_init_request_info(&r, CCS_MAC_SIGNAL) == CCS_CONFIG_DISABLED)
++ return 0;
++ if (!sig)
++ return 0; /* No check for NULL signal. */
++ r.param_type = CCS_TYPE_SIGNAL_ACL;
++ r.param.signal.sig = sig;
++ r.param.signal.dest_pattern = domain->domainname->name;
++ r.granted = true;
++ if (ccs_sys_getpid() == pid) {
++ ccs_audit_log(&r);
++ return 0; /* No check for self process. */
++ }
++ { /* Simplified checking. */
++ struct task_struct *p = NULL;
++ ccs_tasklist_lock();
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24)
++ if (pid > 0)
++ p = ccsecurity_exports.find_task_by_vpid((pid_t) pid);
++ else if (pid == 0)
++ p = current;
++ else if (pid == -1)
++ dest = &ccs_kernel_domain;
++ else
++ p = ccsecurity_exports.find_task_by_vpid((pid_t) -pid);
++#else
++ if (pid > 0)
++ p = find_task_by_pid((pid_t) pid);
++ else if (pid == 0)
++ p = current;
++ else if (pid == -1)
++ dest = &ccs_kernel_domain;
++ else
++ p = find_task_by_pid((pid_t) -pid);
++#endif
++ if (p)
++ dest = ccs_task_domain(p);
++ ccs_tasklist_unlock();
++ }
++ if (!dest)
++ return 0; /* I can't find destinatioin. */
++ if (domain == dest) {
++ ccs_audit_log(&r);
++ return 0; /* No check for self domain. */
++ }
++ r.param.signal.dest_pattern = dest->domainname->name;
++ return ccs_check_acl(&r);
++}
++
++/**
++ * ccs_signal_acl - Check permission for signal.
++ *
++ * @pid: Target's PID.
++ * @sig: Signal number.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_signal_acl(const int pid, const int sig)
++{
++ int error;
++ if (!sig)
++ error = 0;
++ else {
++ const int idx = ccs_read_lock();
++ error = ccs_signal_acl2(sig, pid);
++ ccs_read_unlock(idx);
++ }
++ return error;
++}
++
++/**
++ * ccs_signal_acl0 - Permission check for signal().
++ *
++ * @tgid: Unused.
++ * @pid: Target's PID.
++ * @sig: Signal number.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_signal_acl0(pid_t tgid, pid_t pid, int sig)
++{
++ return ccs_signal_acl(pid, sig);
++}
++
++#endif
++
++#ifdef CONFIG_CCSECURITY_MISC
++
++/**
++ * ccs_check_env_acl - Check permission for environment variable's name.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ * @ptr: Pointer to "struct ccs_acl_info".
++ *
++ * Returns true if granted, false otherwise.
++ */
++static bool ccs_check_env_acl(struct ccs_request_info *r,
++ const struct ccs_acl_info *ptr)
++{
++ const struct ccs_env_acl *acl = container_of(ptr, typeof(*acl), head);
++ return ccs_path_matches_pattern(r->param.environ.name, acl->env);
++}
++
++/**
++ * ccs_env_perm - Check permission for environment variable's name.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ * @env: The name of environment variable.
++ *
++ * Returns 0 on success, negative value otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static int ccs_env_perm(struct ccs_request_info *r, const char *env)
++{
++ struct ccs_path_info environ;
++ if (!env || !*env)
++ return 0;
++ environ.name = env;
++ ccs_fill_path_info(&environ);
++ r->param_type = CCS_TYPE_ENV_ACL;
++ r->param.environ.name = &environ;
++ return ccs_check_acl(r);
++}
++
++/**
++ * ccs_environ - Check permission for environment variable names.
++ *
++ * @ee: Pointer to "struct ccs_execve".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_environ(struct ccs_execve *ee)
++{
++ struct ccs_request_info *r = &ee->r;
++ struct linux_binprm *bprm = ee->bprm;
++ /* env_page.data is allocated by ccs_dump_page(). */
++ struct ccs_page_dump env_page = { };
++ char *arg_ptr; /* Size is CCS_EXEC_TMPSIZE bytes */
++ int arg_len = 0;
++ unsigned long pos = bprm->p;
++ int offset = pos % PAGE_SIZE;
++ int argv_count = bprm->argc;
++ int envp_count = bprm->envc;
++ /* printk(KERN_DEBUG "start %d %d\n", argv_count, envp_count); */
++ int error = -ENOMEM;
++ ee->r.type = CCS_MAC_ENVIRON;
++ ee->r.profile = ccs_current_domain()->profile;
++ ee->r.mode = ccs_get_mode(ee->r.profile, CCS_MAC_ENVIRON);
++ if (!r->mode || !envp_count)
++ return 0;
++ arg_ptr = kzalloc(CCS_EXEC_TMPSIZE, CCS_GFP_FLAGS);
++ if (!arg_ptr)
++ goto out;
++ while (error == -ENOMEM) {
++ if (!ccs_dump_page(bprm, pos, &env_page))
++ goto out;
++ pos += PAGE_SIZE - offset;
++ /* Read. */
++ while (argv_count && offset < PAGE_SIZE) {
++ if (!env_page.data[offset++])
++ argv_count--;
++ }
++ if (argv_count) {
++ offset = 0;
++ continue;
++ }
++ while (offset < PAGE_SIZE) {
++ const unsigned char c = env_page.data[offset++];
++ if (c && arg_len < CCS_EXEC_TMPSIZE - 10) {
++ if (c == '=') {
++ arg_ptr[arg_len++] = '\0';
++ } else if (c == '\\') {
++ arg_ptr[arg_len++] = '\\';
++ arg_ptr[arg_len++] = '\\';
++ } else if (c > ' ' && c < 127) {
++ arg_ptr[arg_len++] = c;
++ } else {
++ arg_ptr[arg_len++] = '\\';
++ arg_ptr[arg_len++] = (c >> 6) + '0';
++ arg_ptr[arg_len++]
++ = ((c >> 3) & 7) + '0';
++ arg_ptr[arg_len++] = (c & 7) + '0';
++ }
++ } else {
++ arg_ptr[arg_len] = '\0';
++ }
++ if (c)
++ continue;
++ if (ccs_env_perm(r, arg_ptr)) {
++ error = -EPERM;
++ break;
++ }
++ if (!--envp_count) {
++ error = 0;
++ break;
++ }
++ arg_len = 0;
++ }
++ offset = 0;
++ }
++out:
++ if (r->mode != CCS_CONFIG_ENFORCING)
++ error = 0;
++ kfree(env_page.data);
++ kfree(arg_ptr);
++ return error;
++}
++
++#endif
++
++/**
++ * ccs_argv - Check argv[] in "struct linux_binbrm".
++ *
++ * @index: Index number of @arg_ptr.
++ * @arg_ptr: Contents of argv[@index].
++ * @argc: Length of @argv.
++ * @argv: Pointer to "struct ccs_argv".
++ * @checked: Set to true if @argv[@index] was found.
++ *
++ * Returns true on success, false otherwise.
++ */
++static bool ccs_argv(const unsigned int index, const char *arg_ptr,
++ const int argc, const struct ccs_argv *argv,
++ u8 *checked)
++{
++ int i;
++ struct ccs_path_info arg;
++ arg.name = arg_ptr;
++ for (i = 0; i < argc; argv++, checked++, i++) {
++ bool result;
++ if (index != argv->index)
++ continue;
++ *checked = 1;
++ ccs_fill_path_info(&arg);
++ result = ccs_path_matches_pattern(&arg, argv->value);
++ if (argv->is_not)
++ result = !result;
++ if (!result)
++ return false;
++ }
++ return true;
++}
++
++/**
++ * ccs_envp - Check envp[] in "struct linux_binbrm".
++ *
++ * @env_name: The name of environment variable.
++ * @env_value: The value of environment variable.
++ * @envc: Length of @envp.
++ * @envp: Pointer to "struct ccs_envp".
++ * @checked: Set to true if @envp[@env_name] was found.
++ *
++ * Returns true on success, false otherwise.
++ */
++static bool ccs_envp(const char *env_name, const char *env_value,
++ const int envc, const struct ccs_envp *envp,
++ u8 *checked)
++{
++ int i;
++ struct ccs_path_info name;
++ struct ccs_path_info value;
++ name.name = env_name;
++ ccs_fill_path_info(&name);
++ value.name = env_value;
++ ccs_fill_path_info(&value);
++ for (i = 0; i < envc; envp++, checked++, i++) {
++ bool result;
++ if (!ccs_path_matches_pattern(&name, envp->name))
++ continue;
++ *checked = 1;
++ if (envp->value) {
++ result = ccs_path_matches_pattern(&value, envp->value);
++ if (envp->is_not)
++ result = !result;
++ } else {
++ result = true;
++ if (!envp->is_not)
++ result = !result;
++ }
++ if (!result)
++ return false;
++ }
++ return true;
++}
++
++/**
++ * ccs_scan_bprm - Scan "struct linux_binprm".
++ *
++ * @ee: Pointer to "struct ccs_execve".
++ * @argc: Length of @argc.
++ * @argv: Pointer to "struct ccs_argv".
++ * @envc: Length of @envp.
++ * @envp: Poiner to "struct ccs_envp".
++ *
++ * Returns true on success, false otherwise.
++ */
++static bool ccs_scan_bprm(struct ccs_execve *ee,
++ const u16 argc, const struct ccs_argv *argv,
++ const u16 envc, const struct ccs_envp *envp)
++{
++ struct linux_binprm *bprm = ee->bprm;
++ struct ccs_page_dump *dump = &ee->dump;
++ char *arg_ptr = ee->tmp;
++ int arg_len = 0;
++ unsigned long pos = bprm->p;
++ int offset = pos % PAGE_SIZE;
++ int argv_count = bprm->argc;
++ int envp_count = bprm->envc;
++ bool result = true;
++ u8 local_checked[32];
++ u8 *checked;
++ if (argc + envc <= sizeof(local_checked)) {
++ checked = local_checked;
++ memset(local_checked, 0, sizeof(local_checked));
++ } else {
++ checked = kzalloc(argc + envc, CCS_GFP_FLAGS);
++ if (!checked)
++ return false;
++ }
++ while (argv_count || envp_count) {
++ if (!ccs_dump_page(bprm, pos, dump)) {
++ result = false;
++ goto out;
++ }
++ pos += PAGE_SIZE - offset;
++ while (offset < PAGE_SIZE) {
++ /* Read. */
++ const char *kaddr = dump->data;
++ const unsigned char c = kaddr[offset++];
++ if (c && arg_len < CCS_EXEC_TMPSIZE - 10) {
++ if (c == '\\') {
++ arg_ptr[arg_len++] = '\\';
++ arg_ptr[arg_len++] = '\\';
++ } else if (c > ' ' && c < 127) {
++ arg_ptr[arg_len++] = c;
++ } else {
++ arg_ptr[arg_len++] = '\\';
++ arg_ptr[arg_len++] = (c >> 6) + '0';
++ arg_ptr[arg_len++] =
++ ((c >> 3) & 7) + '0';
++ arg_ptr[arg_len++] = (c & 7) + '0';
++ }
++ } else {
++ arg_ptr[arg_len] = '\0';
++ }
++ if (c)
++ continue;
++ /* Check. */
++ if (argv_count) {
++ if (!ccs_argv(bprm->argc - argv_count,
++ arg_ptr, argc, argv,
++ checked)) {
++ result = false;
++ break;
++ }
++ argv_count--;
++ } else if (envp_count) {
++ char *cp = strchr(arg_ptr, '=');
++ if (cp) {
++ *cp = '\0';
++ if (!ccs_envp(arg_ptr, cp + 1,
++ envc, envp,
++ checked + argc)) {
++ result = false;
++ break;
++ }
++ }
++ envp_count--;
++ } else {
++ break;
++ }
++ arg_len = 0;
++ }
++ offset = 0;
++ if (!result)
++ break;
++ }
++out:
++ if (result) {
++ int i;
++ /* Check not-yet-checked entries. */
++ for (i = 0; i < argc; i++) {
++ if (checked[i])
++ continue;
++ /*
++ * Return true only if all unchecked indexes in
++ * bprm->argv[] are not matched.
++ */
++ if (argv[i].is_not)
++ continue;
++ result = false;
++ break;
++ }
++ for (i = 0; i < envc; envp++, i++) {
++ if (checked[argc + i])
++ continue;
++ /*
++ * Return true only if all unchecked environ variables
++ * in bprm->envp[] are either undefined or not matched.
++ */
++ if ((!envp->value && !envp->is_not) ||
++ (envp->value && envp->is_not))
++ continue;
++ result = false;
++ break;
++ }
++ }
++ if (checked != local_checked)
++ kfree(checked);
++ return result;
++}
++
++/**
++ * ccs_scan_exec_realpath - Check "exec.realpath" parameter of "struct ccs_condition".
++ *
++ * @file: Pointer to "struct file".
++ * @ptr: Pointer to "struct ccs_name_union".
++ * @match: True if "exec.realpath=", false if "exec.realpath!=".
++ *
++ * Returns true on success, false otherwise.
++ */
++static bool ccs_scan_exec_realpath(struct file *file,
++ const struct ccs_name_union *ptr,
++ const bool match)
++{
++ bool result;
++ struct ccs_path_info exe;
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
++ struct path path;
++#endif
++ if (!file)
++ return false;
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
++ exe.name = ccs_realpath(&file->f_path);
++#else
++ path.mnt = file->f_vfsmnt;
++ path.dentry = file->f_dentry;
++ exe.name = ccs_realpath(&path);
++#endif
++ if (!exe.name)
++ return false;
++ ccs_fill_path_info(&exe);
++ result = ccs_compare_name_union(&exe, ptr);
++ kfree(exe.name);
++ return result == match;
++}
++
++/**
++ * ccs_get_attributes - Revalidate "struct inode".
++ *
++ * @obj: Pointer to "struct ccs_obj_info".
++ *
++ * Returns nothing.
++ */
++void ccs_get_attributes(struct ccs_obj_info *obj)
++{
++ u8 i;
++ struct dentry *dentry = NULL;
++
++ for (i = 0; i < CCS_MAX_PATH_STAT; i++) {
++ struct inode *inode;
++ switch (i) {
++ case CCS_PATH1:
++ dentry = obj->path1.dentry;
++ if (!dentry)
++ continue;
++ break;
++ case CCS_PATH2:
++ dentry = obj->path2.dentry;
++ if (!dentry)
++ continue;
++ break;
++ default:
++ if (!dentry)
++ continue;
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
++ spin_lock(&dcache_lock);
++ dentry = dget(dentry->d_parent);
++ spin_unlock(&dcache_lock);
++#else
++ dentry = dget_parent(dentry);
++#endif
++ break;
++ }
++ inode = dentry->d_inode;
++ if (inode) {
++ struct ccs_mini_stat *stat = &obj->stat[i];
++ stat->uid = inode->i_uid;
++ stat->gid = inode->i_gid;
++ stat->ino = inode->i_ino;
++ stat->mode = inode->i_mode;
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
++ stat->dev = inode->i_dev;
++#else
++ stat->dev = inode->i_sb->s_dev;
++#endif
++ stat->rdev = inode->i_rdev;
++ obj->stat_valid[i] = true;
++ }
++ if (i & 1) /* i == CCS_PATH1_PARENT || i == CCS_PATH2_PARENT */
++ dput(dentry);
++ }
++}
++
++/**
++ * ccs_condition - Check condition part.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ * @cond: Pointer to "struct ccs_condition". Maybe NULL.
++ *
++ * Returns true on success, false otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static bool ccs_condition(struct ccs_request_info *r,
++ const struct ccs_condition *cond)
++{
++ const u32 ccs_flags = ccs_current_flags();
++ u32 i;
++ unsigned long min_v[2] = { 0, 0 };
++ unsigned long max_v[2] = { 0, 0 };
++ const struct ccs_condition_element *condp;
++ const struct ccs_number_union *numbers_p;
++ const struct ccs_name_union *names_p;
++ const struct ccs_argv *argv;
++ const struct ccs_envp *envp;
++ struct ccs_obj_info *obj;
++ u16 condc;
++ u16 argc;
++ u16 envc;
++ struct linux_binprm *bprm = NULL;
++ if (!cond)
++ return true;
++ condc = cond->condc;
++ argc = cond->argc;
++ envc = cond->envc;
++ obj = r->obj;
++ if (r->ee)
++ bprm = r->ee->bprm;
++ if (!bprm && (argc || envc))
++ return false;
++ condp = (struct ccs_condition_element *) (cond + 1);
++ numbers_p = (const struct ccs_number_union *) (condp + condc);
++ names_p = (const struct ccs_name_union *)
++ (numbers_p + cond->numbers_count);
++ argv = (const struct ccs_argv *) (names_p + cond->names_count);
++ envp = (const struct ccs_envp *) (argv + argc);
++ for (i = 0; i < condc; i++) {
++ const bool match = condp->equals;
++ const u8 left = condp->left;
++ const u8 right = condp->right;
++ bool is_bitop[2] = { false, false };
++ u8 j;
++ condp++;
++ /* Check argv[] and envp[] later. */
++ if (left == CCS_ARGV_ENTRY || left == CCS_ENVP_ENTRY)
++ continue;
++ /* Check string expressions. */
++ if (right == CCS_NAME_UNION) {
++ const struct ccs_name_union *ptr = names_p++;
++ switch (left) {
++ struct ccs_path_info *symlink;
++ struct ccs_execve *ee;
++ struct file *file;
++ case CCS_SYMLINK_TARGET:
++ symlink = obj ? obj->symlink_target : NULL;
++ if (!symlink ||
++ !ccs_compare_name_union(symlink, ptr)
++ == match)
++ goto out;
++ break;
++ case CCS_EXEC_REALPATH:
++ ee = r->ee;
++ file = ee ? ee->bprm->file : NULL;
++ if (!ccs_scan_exec_realpath(file, ptr, match))
++ goto out;
++ break;
++ }
++ continue;
++ }
++ /* Check numeric or bit-op expressions. */
++ for (j = 0; j < 2; j++) {
++ const u8 index = j ? right : left;
++ unsigned long value = 0;
++ switch (index) {
++ case CCS_TASK_UID:
++ value = from_kuid(&init_user_ns,
++ current_uid());
++ break;
++ case CCS_TASK_EUID:
++ value = from_kuid(&init_user_ns,
++ current_euid());
++ break;
++ case CCS_TASK_SUID:
++ value = from_kuid(&init_user_ns,
++ current_suid());
++ break;
++ case CCS_TASK_FSUID:
++ value = from_kuid(&init_user_ns,
++ current_fsuid());
++ break;
++ case CCS_TASK_GID:
++ value = from_kgid(&init_user_ns,
++ current_gid());
++ break;
++ case CCS_TASK_EGID:
++ value = from_kgid(&init_user_ns,
++ current_egid());
++ break;
++ case CCS_TASK_SGID:
++ value = from_kgid(&init_user_ns,
++ current_sgid());
++ break;
++ case CCS_TASK_FSGID:
++ value = from_kgid(&init_user_ns,
++ current_fsgid());
++ break;
++ case CCS_TASK_PID:
++ value = ccs_sys_getpid();
++ break;
++ case CCS_TASK_PPID:
++ value = ccs_sys_getppid();
++ break;
++ case CCS_TYPE_IS_SOCKET:
++ value = S_IFSOCK;
++ break;
++ case CCS_TYPE_IS_SYMLINK:
++ value = S_IFLNK;
++ break;
++ case CCS_TYPE_IS_FILE:
++ value = S_IFREG;
++ break;
++ case CCS_TYPE_IS_BLOCK_DEV:
++ value = S_IFBLK;
++ break;
++ case CCS_TYPE_IS_DIRECTORY:
++ value = S_IFDIR;
++ break;
++ case CCS_TYPE_IS_CHAR_DEV:
++ value = S_IFCHR;
++ break;
++ case CCS_TYPE_IS_FIFO:
++ value = S_IFIFO;
++ break;
++ case CCS_MODE_SETUID:
++ value = S_ISUID;
++ break;
++ case CCS_MODE_SETGID:
++ value = S_ISGID;
++ break;
++ case CCS_MODE_STICKY:
++ value = S_ISVTX;
++ break;
++ case CCS_MODE_OWNER_READ:
++ value = S_IRUSR;
++ break;
++ case CCS_MODE_OWNER_WRITE:
++ value = S_IWUSR;
++ break;
++ case CCS_MODE_OWNER_EXECUTE:
++ value = S_IXUSR;
++ break;
++ case CCS_MODE_GROUP_READ:
++ value = S_IRGRP;
++ break;
++ case CCS_MODE_GROUP_WRITE:
++ value = S_IWGRP;
++ break;
++ case CCS_MODE_GROUP_EXECUTE:
++ value = S_IXGRP;
++ break;
++ case CCS_MODE_OTHERS_READ:
++ value = S_IROTH;
++ break;
++ case CCS_MODE_OTHERS_WRITE:
++ value = S_IWOTH;
++ break;
++ case CCS_MODE_OTHERS_EXECUTE:
++ value = S_IXOTH;
++ break;
++ case CCS_EXEC_ARGC:
++ if (!bprm)
++ goto out;
++ value = bprm->argc;
++ break;
++ case CCS_EXEC_ENVC:
++ if (!bprm)
++ goto out;
++ value = bprm->envc;
++ break;
++ case CCS_TASK_TYPE:
++ value = ((u8) ccs_flags)
++ & CCS_TASK_IS_EXECUTE_HANDLER;
++ break;
++ case CCS_TASK_EXECUTE_HANDLER:
++ value = CCS_TASK_IS_EXECUTE_HANDLER;
++ break;
++ case CCS_NUMBER_UNION:
++ /* Fetch values later. */
++ break;
++ default:
++ if (!obj)
++ goto out;
++ if (!obj->validate_done) {
++ ccs_get_attributes(obj);
++ obj->validate_done = true;
++ }
++ {
++ u8 stat_index;
++ struct ccs_mini_stat *stat;
++ switch (index) {
++ case CCS_PATH1_UID:
++ case CCS_PATH1_GID:
++ case CCS_PATH1_INO:
++ case CCS_PATH1_MAJOR:
++ case CCS_PATH1_MINOR:
++ case CCS_PATH1_TYPE:
++ case CCS_PATH1_DEV_MAJOR:
++ case CCS_PATH1_DEV_MINOR:
++ case CCS_PATH1_PERM:
++ stat_index = CCS_PATH1;
++ break;
++ case CCS_PATH2_UID:
++ case CCS_PATH2_GID:
++ case CCS_PATH2_INO:
++ case CCS_PATH2_MAJOR:
++ case CCS_PATH2_MINOR:
++ case CCS_PATH2_TYPE:
++ case CCS_PATH2_DEV_MAJOR:
++ case CCS_PATH2_DEV_MINOR:
++ case CCS_PATH2_PERM:
++ stat_index = CCS_PATH2;
++ break;
++ case CCS_PATH1_PARENT_UID:
++ case CCS_PATH1_PARENT_GID:
++ case CCS_PATH1_PARENT_INO:
++ case CCS_PATH1_PARENT_PERM:
++ stat_index = CCS_PATH1_PARENT;
++ break;
++ case CCS_PATH2_PARENT_UID:
++ case CCS_PATH2_PARENT_GID:
++ case CCS_PATH2_PARENT_INO:
++ case CCS_PATH2_PARENT_PERM:
++ stat_index = CCS_PATH2_PARENT;
++ break;
++ default:
++ goto out;
++ }
++ if (!obj->stat_valid[stat_index])
++ goto out;
++ stat = &obj->stat[stat_index];
++ switch (index) {
++ case CCS_PATH1_UID:
++ case CCS_PATH2_UID:
++ case CCS_PATH1_PARENT_UID:
++ case CCS_PATH2_PARENT_UID:
++ value = from_kuid
++ (&init_user_ns,
++ stat->uid);
++ break;
++ case CCS_PATH1_GID:
++ case CCS_PATH2_GID:
++ case CCS_PATH1_PARENT_GID:
++ case CCS_PATH2_PARENT_GID:
++ value = from_kgid
++ (&init_user_ns,
++ stat->gid);
++ break;
++ case CCS_PATH1_INO:
++ case CCS_PATH2_INO:
++ case CCS_PATH1_PARENT_INO:
++ case CCS_PATH2_PARENT_INO:
++ value = stat->ino;
++ break;
++ case CCS_PATH1_MAJOR:
++ case CCS_PATH2_MAJOR:
++ value = MAJOR(stat->dev);
++ break;
++ case CCS_PATH1_MINOR:
++ case CCS_PATH2_MINOR:
++ value = MINOR(stat->dev);
++ break;
++ case CCS_PATH1_TYPE:
++ case CCS_PATH2_TYPE:
++ value = stat->mode & S_IFMT;
++ break;
++ case CCS_PATH1_DEV_MAJOR:
++ case CCS_PATH2_DEV_MAJOR:
++ value = MAJOR(stat->rdev);
++ break;
++ case CCS_PATH1_DEV_MINOR:
++ case CCS_PATH2_DEV_MINOR:
++ value = MINOR(stat->rdev);
++ break;
++ case CCS_PATH1_PERM:
++ case CCS_PATH2_PERM:
++ case CCS_PATH1_PARENT_PERM:
++ case CCS_PATH2_PARENT_PERM:
++ value = stat->mode & S_IALLUGO;
++ break;
++ }
++ }
++ break;
++ }
++ max_v[j] = value;
++ min_v[j] = value;
++ switch (index) {
++ case CCS_MODE_SETUID:
++ case CCS_MODE_SETGID:
++ case CCS_MODE_STICKY:
++ case CCS_MODE_OWNER_READ:
++ case CCS_MODE_OWNER_WRITE:
++ case CCS_MODE_OWNER_EXECUTE:
++ case CCS_MODE_GROUP_READ:
++ case CCS_MODE_GROUP_WRITE:
++ case CCS_MODE_GROUP_EXECUTE:
++ case CCS_MODE_OTHERS_READ:
++ case CCS_MODE_OTHERS_WRITE:
++ case CCS_MODE_OTHERS_EXECUTE:
++ is_bitop[j] = true;
++ }
++ }
++ if (left == CCS_NUMBER_UNION) {
++ /* Fetch values now. */
++ const struct ccs_number_union *ptr = numbers_p++;
++ min_v[0] = ptr->values[0];
++ max_v[0] = ptr->values[1];
++ }
++ if (right == CCS_NUMBER_UNION) {
++ /* Fetch values now. */
++ const struct ccs_number_union *ptr = numbers_p++;
++ if (ptr->group) {
++ if (ccs_number_matches_group(min_v[0],
++ max_v[0],
++ ptr->group)
++ == match)
++ continue;
++ } else {
++ if ((min_v[0] <= ptr->values[1] &&
++ max_v[0] >= ptr->values[0]) == match)
++ continue;
++ }
++ goto out;
++ }
++ /*
++ * Bit operation is valid only when counterpart value
++ * represents permission.
++ */
++ if (is_bitop[0] && is_bitop[1]) {
++ goto out;
++ } else if (is_bitop[0]) {
++ switch (right) {
++ case CCS_PATH1_PERM:
++ case CCS_PATH1_PARENT_PERM:
++ case CCS_PATH2_PERM:
++ case CCS_PATH2_PARENT_PERM:
++ if (!(max_v[0] & max_v[1]) == !match)
++ continue;
++ }
++ goto out;
++ } else if (is_bitop[1]) {
++ switch (left) {
++ case CCS_PATH1_PERM:
++ case CCS_PATH1_PARENT_PERM:
++ case CCS_PATH2_PERM:
++ case CCS_PATH2_PARENT_PERM:
++ if (!(max_v[0] & max_v[1]) == !match)
++ continue;
++ }
++ goto out;
++ }
++ /* Normal value range comparison. */
++ if ((min_v[0] <= max_v[1] && max_v[0] >= min_v[1]) == match)
++ continue;
++out:
++ return false;
++ }
++ /* Check argv[] and envp[] now. */
++ if (r->ee && (argc || envc))
++ return ccs_scan_bprm(r->ee, argc, argv, envc, envp);
++ return true;
++}
++
++#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
++
++/**
++ * ccs_check_task_acl - Check permission for task operation.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ * @ptr: Pointer to "struct ccs_acl_info".
++ *
++ * Returns true if granted, false otherwise.
++ */
++static bool ccs_check_task_acl(struct ccs_request_info *r,
++ const struct ccs_acl_info *ptr)
++{
++ const struct ccs_task_acl *acl = container_of(ptr, typeof(*acl), head);
++ return !ccs_pathcmp(r->param.task.domainname, acl->domainname);
++}
++
++#endif
++
++/**
++ * ccs_init_request_info - Initialize "struct ccs_request_info" members.
++ *
++ * @r: Pointer to "struct ccs_request_info" to initialize.
++ * @index: Index number of functionality.
++ *
++ * Returns mode.
++ *
++ * "task auto_domain_transition" keyword is evaluated before returning mode for
++ * @index. If "task auto_domain_transition" keyword was specified and
++ * transition to that domain failed, the current thread will be killed by
++ * SIGKILL. Note that if current->pid == 1, sending SIGKILL won't work.
++ */
++int ccs_init_request_info(struct ccs_request_info *r, const u8 index)
++{
++#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
++ u8 i;
++ const char *buf;
++ for (i = 0; i < 255; i++) {
++ const u8 profile = ccs_current_domain()->profile;
++ memset(r, 0, sizeof(*r));
++ r->profile = profile;
++ r->type = index;
++ r->mode = ccs_get_mode(profile, index);
++ r->param_type = CCS_TYPE_AUTO_TASK_ACL;
++ ccs_check_acl(r);
++ if (!r->granted)
++ return r->mode;
++ buf = container_of(r->matched_acl, typeof(struct ccs_task_acl),
++ head)->domainname->name;
++ if (!ccs_assign_domain(buf, true))
++ break;
++ }
++ ccs_transition_failed(buf);
++ return CCS_CONFIG_DISABLED;
++#else
++ const u8 profile = ccs_current_domain()->profile;
++ memset(r, 0, sizeof(*r));
++ r->profile = profile;
++ r->type = index;
++ r->mode = ccs_get_mode(profile, index);
++ return r->mode;
++#endif
++}
++
++/**
++ * ccs_byte_range - Check whether the string is a \ooo style octal value.
++ *
++ * @str: Pointer to the string.
++ *
++ * Returns true if @str is a \ooo style octal value, false otherwise.
++ */
++static bool ccs_byte_range(const char *str)
++{
++ return *str >= '0' && *str++ <= '3' &&
++ *str >= '0' && *str++ <= '7' &&
++ *str >= '0' && *str <= '7';
++}
++
++/**
++ * ccs_decimal - Check whether the character is a decimal character.
++ *
++ * @c: The character to check.
++ *
++ * Returns true if @c is a decimal character, false otherwise.
++ */
++static bool ccs_decimal(const char c)
++{
++ return c >= '0' && c <= '9';
++}
++
++/**
++ * ccs_hexadecimal - Check whether the character is a hexadecimal character.
++ *
++ * @c: The character to check.
++ *
++ * Returns true if @c is a hexadecimal character, false otherwise.
++ */
++static bool ccs_hexadecimal(const char c)
++{
++ return (c >= '0' && c <= '9') ||
++ (c >= 'A' && c <= 'F') ||
++ (c >= 'a' && c <= 'f');
++}
++
++/**
++ * ccs_alphabet_char - Check whether the character is an alphabet.
++ *
++ * @c: The character to check.
++ *
++ * Returns true if @c is an alphabet character, false otherwise.
++ */
++static bool ccs_alphabet_char(const char c)
++{
++ return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z');
++}
++
++/**
++ * ccs_file_matches_pattern2 - Pattern matching without '/' character and "\-" pattern.
++ *
++ * @filename: The start of string to check.
++ * @filename_end: The end of string to check.
++ * @pattern: The start of pattern to compare.
++ * @pattern_end: The end of pattern to compare.
++ *
++ * Returns true if @filename matches @pattern, false otherwise.
++ */
++static bool ccs_file_matches_pattern2(const char *filename,
++ const char *filename_end,
++ const char *pattern,
++ const char *pattern_end)
++{
++ while (filename < filename_end && pattern < pattern_end) {
++ char c;
++ if (*pattern != '\\') {
++ if (*filename++ != *pattern++)
++ return false;
++ continue;
++ }
++ c = *filename;
++ pattern++;
++ switch (*pattern) {
++ int i;
++ int j;
++ case '?':
++ if (c == '/') {
++ return false;
++ } else if (c == '\\') {
++ if (filename[1] == '\\')
++ filename++;
++ else if (ccs_byte_range(filename + 1))
++ filename += 3;
++ else
++ return false;
++ }
++ break;
++ case '\\':
++ if (c != '\\')
++ return false;
++ if (*++filename != '\\')
++ return false;
++ break;
++ case '+':
++ if (!ccs_decimal(c))
++ return false;
++ break;
++ case 'x':
++ if (!ccs_hexadecimal(c))
++ return false;
++ break;
++ case 'a':
++ if (!ccs_alphabet_char(c))
++ return false;
++ break;
++ case '0':
++ case '1':
++ case '2':
++ case '3':
++ if (c == '\\' && ccs_byte_range(filename + 1)
++ && !strncmp(filename + 1, pattern, 3)) {
++ filename += 3;
++ pattern += 2;
++ break;
++ }
++ return false; /* Not matched. */
++ case '*':
++ case '@':
++ for (i = 0; i <= filename_end - filename; i++) {
++ if (ccs_file_matches_pattern2(filename + i,
++ filename_end,
++ pattern + 1,
++ pattern_end))
++ return true;
++ c = filename[i];
++ if (c == '.' && *pattern == '@')
++ break;
++ if (c != '\\')
++ continue;
++ if (filename[i + 1] == '\\')
++ i++;
++ else if (ccs_byte_range(filename + i + 1))
++ i += 3;
++ else
++ break; /* Bad pattern. */
++ }
++ return false; /* Not matched. */
++ default:
++ j = 0;
++ c = *pattern;
++ if (c == '$') {
++ while (ccs_decimal(filename[j]))
++ j++;
++ } else if (c == 'X') {
++ while (ccs_hexadecimal(filename[j]))
++ j++;
++ } else if (c == 'A') {
++ while (ccs_alphabet_char(filename[j]))
++ j++;
++ }
++ for (i = 1; i <= j; i++) {
++ if (ccs_file_matches_pattern2(filename + i,
++ filename_end,
++ pattern + 1,
++ pattern_end))
++ return true;
++ }
++ return false; /* Not matched or bad pattern. */
++ }
++ filename++;
++ pattern++;
++ }
++ while (*pattern == '\\' &&
++ (*(pattern + 1) == '*' || *(pattern + 1) == '@'))
++ pattern += 2;
++ return filename == filename_end && pattern == pattern_end;
++}
++
++/**
++ * ccs_file_matches_pattern - Pattern matching without '/' character.
++ *
++ * @filename: The start of string to check.
++ * @filename_end: The end of string to check.
++ * @pattern: The start of pattern to compare.
++ * @pattern_end: The end of pattern to compare.
++ *
++ * Returns true if @filename matches @pattern, false otherwise.
++ */
++static bool ccs_file_matches_pattern(const char *filename,
++ const char *filename_end,
++ const char *pattern,
++ const char *pattern_end)
++{
++ const char *pattern_start = pattern;
++ bool first = true;
++ bool result;
++ while (pattern < pattern_end - 1) {
++ /* Split at "\-" pattern. */
++ if (*pattern++ != '\\' || *pattern++ != '-')
++ continue;
++ result = ccs_file_matches_pattern2(filename, filename_end,
++ pattern_start, pattern - 2);
++ if (first)
++ result = !result;
++ if (result)
++ return false;
++ first = false;
++ pattern_start = pattern;
++ }
++ result = ccs_file_matches_pattern2(filename, filename_end,
++ pattern_start, pattern_end);
++ return first ? result : !result;
++}
++
++/**
++ * ccs_path_matches_pattern2 - Do pathname pattern matching.
++ *
++ * @f: The start of string to check.
++ * @p: The start of pattern to compare.
++ *
++ * Returns true if @f matches @p, false otherwise.
++ */
++static bool ccs_path_matches_pattern2(const char *f, const char *p)
++{
++ const char *f_delimiter;
++ const char *p_delimiter;
++ while (*f && *p) {
++ f_delimiter = strchr(f, '/');
++ if (!f_delimiter)
++ f_delimiter = f + strlen(f);
++ p_delimiter = strchr(p, '/');
++ if (!p_delimiter)
++ p_delimiter = p + strlen(p);
++ if (*p == '\\' && *(p + 1) == '{')
++ goto recursive;
++ if (!ccs_file_matches_pattern(f, f_delimiter, p, p_delimiter))
++ return false;
++ f = f_delimiter;
++ if (*f)
++ f++;
++ p = p_delimiter;
++ if (*p)
++ p++;
++ }
++ /* Ignore trailing "\*" and "\@" in @pattern. */
++ while (*p == '\\' &&
++ (*(p + 1) == '*' || *(p + 1) == '@'))
++ p += 2;
++ return !*f && !*p;
++recursive:
++ /*
++ * The "\{" pattern is permitted only after '/' character.
++ * This guarantees that below "*(p - 1)" is safe.
++ * Also, the "\}" pattern is permitted only before '/' character
++ * so that "\{" + "\}" pair will not break the "\-" operator.
++ */
++ if (*(p - 1) != '/' || p_delimiter <= p + 3 || *p_delimiter != '/' ||
++ *(p_delimiter - 1) != '}' || *(p_delimiter - 2) != '\\')
++ return false; /* Bad pattern. */
++ do {
++ /* Compare current component with pattern. */
++ if (!ccs_file_matches_pattern(f, f_delimiter, p + 2,
++ p_delimiter - 2))
++ break;
++ /* Proceed to next component. */
++ f = f_delimiter;
++ if (!*f)
++ break;
++ f++;
++ /* Continue comparison. */
++ if (ccs_path_matches_pattern2(f, p_delimiter + 1))
++ return true;
++ f_delimiter = strchr(f, '/');
++ } while (f_delimiter);
++ return false; /* Not matched. */
++}
++
++/**
++ * ccs_path_matches_pattern - Check whether the given filename matches the given pattern.
++ *
++ * @filename: The filename to check.
++ * @pattern: The pattern to compare.
++ *
++ * Returns true if matches, false otherwise.
++ *
++ * The following patterns are available.
++ * \\ \ itself.
++ * \ooo Octal representation of a byte.
++ * \* Zero or more repetitions of characters other than '/'.
++ * \@ Zero or more repetitions of characters other than '/' or '.'.
++ * \? 1 byte character other than '/'.
++ * \$ One or more repetitions of decimal digits.
++ * \+ 1 decimal digit.
++ * \X One or more repetitions of hexadecimal digits.
++ * \x 1 hexadecimal digit.
++ * \A One or more repetitions of alphabet characters.
++ * \a 1 alphabet character.
++ *
++ * \- Subtraction operator.
++ *
++ * /\{dir\}/ '/' + 'One or more repetitions of dir/' (e.g. /dir/ /dir/dir/
++ * /dir/dir/dir/ ).
++ */
++static bool ccs_path_matches_pattern(const struct ccs_path_info *filename,
++ const struct ccs_path_info *pattern)
++{
++ const char *f = filename->name;
++ const char *p = pattern->name;
++ const int len = pattern->const_len;
++ /* If @pattern doesn't contain pattern, I can use strcmp(). */
++ if (!pattern->is_patterned)
++ return !ccs_pathcmp(filename, pattern);
++ /* Don't compare directory and non-directory. */
++ if (filename->is_dir != pattern->is_dir)
++ return false;
++ /* Compare the initial length without patterns. */
++ if (strncmp(f, p, len))
++ return false;
++ f += len;
++ p += len;
++ return ccs_path_matches_pattern2(f, p);
++}
+diff --git a/security/ccsecurity/policy_io.c b/security/ccsecurity/policy_io.c
+new file mode 100644
+index 0000000..67adb50
+--- /dev/null
++++ b/security/ccsecurity/policy_io.c
+@@ -0,0 +1,6484 @@
++/*
++ * security/ccsecurity/policy_io.c
++ *
++ * Copyright (C) 2005-2012 NTT DATA CORPORATION
++ *
++ * Version: 1.8.4 2015/05/05
++ */
++
++#include "internal.h"
++
++/***** SECTION1: Constants definition *****/
++
++/* Define this to enable debug mode. */
++/* #define DEBUG_CONDITION */
++
++#ifdef DEBUG_CONDITION
++#define dprintk printk
++#else
++#define dprintk(...) do { } while (0)
++#endif
++
++/* Mapping table from "enum ccs_mac_index" to "enum ccs_mac_category_index". */
++static const u8 ccs_index2category[CCS_MAX_MAC_INDEX] = {
++ /* CONFIG::file group */
++ [CCS_MAC_FILE_EXECUTE] = CCS_MAC_CATEGORY_FILE,
++ [CCS_MAC_FILE_OPEN] = CCS_MAC_CATEGORY_FILE,
++ [CCS_MAC_FILE_CREATE] = CCS_MAC_CATEGORY_FILE,
++ [CCS_MAC_FILE_UNLINK] = CCS_MAC_CATEGORY_FILE,
++#ifdef CONFIG_CCSECURITY_FILE_GETATTR
++ [CCS_MAC_FILE_GETATTR] = CCS_MAC_CATEGORY_FILE,
++#endif
++ [CCS_MAC_FILE_MKDIR] = CCS_MAC_CATEGORY_FILE,
++ [CCS_MAC_FILE_RMDIR] = CCS_MAC_CATEGORY_FILE,
++ [CCS_MAC_FILE_MKFIFO] = CCS_MAC_CATEGORY_FILE,
++ [CCS_MAC_FILE_MKSOCK] = CCS_MAC_CATEGORY_FILE,
++ [CCS_MAC_FILE_TRUNCATE] = CCS_MAC_CATEGORY_FILE,
++ [CCS_MAC_FILE_SYMLINK] = CCS_MAC_CATEGORY_FILE,
++ [CCS_MAC_FILE_MKBLOCK] = CCS_MAC_CATEGORY_FILE,
++ [CCS_MAC_FILE_MKCHAR] = CCS_MAC_CATEGORY_FILE,
++ [CCS_MAC_FILE_LINK] = CCS_MAC_CATEGORY_FILE,
++ [CCS_MAC_FILE_RENAME] = CCS_MAC_CATEGORY_FILE,
++ [CCS_MAC_FILE_CHMOD] = CCS_MAC_CATEGORY_FILE,
++ [CCS_MAC_FILE_CHOWN] = CCS_MAC_CATEGORY_FILE,
++ [CCS_MAC_FILE_CHGRP] = CCS_MAC_CATEGORY_FILE,
++ [CCS_MAC_FILE_IOCTL] = CCS_MAC_CATEGORY_FILE,
++ [CCS_MAC_FILE_CHROOT] = CCS_MAC_CATEGORY_FILE,
++ [CCS_MAC_FILE_MOUNT] = CCS_MAC_CATEGORY_FILE,
++ [CCS_MAC_FILE_UMOUNT] = CCS_MAC_CATEGORY_FILE,
++ [CCS_MAC_FILE_PIVOT_ROOT] = CCS_MAC_CATEGORY_FILE,
++#ifdef CONFIG_CCSECURITY_MISC
++ /* CONFIG::misc group */
++ [CCS_MAC_ENVIRON] = CCS_MAC_CATEGORY_MISC,
++#endif
++#ifdef CONFIG_CCSECURITY_NETWORK
++ /* CONFIG::network group */
++ [CCS_MAC_NETWORK_INET_STREAM_BIND] = CCS_MAC_CATEGORY_NETWORK,
++ [CCS_MAC_NETWORK_INET_STREAM_LISTEN] = CCS_MAC_CATEGORY_NETWORK,
++ [CCS_MAC_NETWORK_INET_STREAM_CONNECT] = CCS_MAC_CATEGORY_NETWORK,
++ [CCS_MAC_NETWORK_INET_STREAM_ACCEPT] = CCS_MAC_CATEGORY_NETWORK,
++ [CCS_MAC_NETWORK_INET_DGRAM_BIND] = CCS_MAC_CATEGORY_NETWORK,
++ [CCS_MAC_NETWORK_INET_DGRAM_SEND] = CCS_MAC_CATEGORY_NETWORK,
++#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
++ [CCS_MAC_NETWORK_INET_DGRAM_RECV] = CCS_MAC_CATEGORY_NETWORK,
++#endif
++ [CCS_MAC_NETWORK_INET_RAW_BIND] = CCS_MAC_CATEGORY_NETWORK,
++ [CCS_MAC_NETWORK_INET_RAW_SEND] = CCS_MAC_CATEGORY_NETWORK,
++#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
++ [CCS_MAC_NETWORK_INET_RAW_RECV] = CCS_MAC_CATEGORY_NETWORK,
++#endif
++ [CCS_MAC_NETWORK_UNIX_STREAM_BIND] = CCS_MAC_CATEGORY_NETWORK,
++ [CCS_MAC_NETWORK_UNIX_STREAM_LISTEN] = CCS_MAC_CATEGORY_NETWORK,
++ [CCS_MAC_NETWORK_UNIX_STREAM_CONNECT] = CCS_MAC_CATEGORY_NETWORK,
++ [CCS_MAC_NETWORK_UNIX_STREAM_ACCEPT] = CCS_MAC_CATEGORY_NETWORK,
++ [CCS_MAC_NETWORK_UNIX_DGRAM_BIND] = CCS_MAC_CATEGORY_NETWORK,
++ [CCS_MAC_NETWORK_UNIX_DGRAM_SEND] = CCS_MAC_CATEGORY_NETWORK,
++#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
++ [CCS_MAC_NETWORK_UNIX_DGRAM_RECV] = CCS_MAC_CATEGORY_NETWORK,
++#endif
++ [CCS_MAC_NETWORK_UNIX_SEQPACKET_BIND] = CCS_MAC_CATEGORY_NETWORK,
++ [CCS_MAC_NETWORK_UNIX_SEQPACKET_LISTEN] = CCS_MAC_CATEGORY_NETWORK,
++ [CCS_MAC_NETWORK_UNIX_SEQPACKET_CONNECT] = CCS_MAC_CATEGORY_NETWORK,
++ [CCS_MAC_NETWORK_UNIX_SEQPACKET_ACCEPT] = CCS_MAC_CATEGORY_NETWORK,
++#endif
++#ifdef CONFIG_CCSECURITY_IPC
++ /* CONFIG::ipc group */
++ [CCS_MAC_SIGNAL] = CCS_MAC_CATEGORY_IPC,
++#endif
++#ifdef CONFIG_CCSECURITY_CAPABILITY
++ /* CONFIG::capability group */
++ [CCS_MAC_CAPABILITY_USE_ROUTE_SOCKET] = CCS_MAC_CATEGORY_CAPABILITY,
++ [CCS_MAC_CAPABILITY_USE_PACKET_SOCKET] = CCS_MAC_CATEGORY_CAPABILITY,
++ [CCS_MAC_CAPABILITY_SYS_REBOOT] = CCS_MAC_CATEGORY_CAPABILITY,
++ [CCS_MAC_CAPABILITY_SYS_VHANGUP] = CCS_MAC_CATEGORY_CAPABILITY,
++ [CCS_MAC_CAPABILITY_SYS_SETTIME] = CCS_MAC_CATEGORY_CAPABILITY,
++ [CCS_MAC_CAPABILITY_SYS_NICE] = CCS_MAC_CATEGORY_CAPABILITY,
++ [CCS_MAC_CAPABILITY_SYS_SETHOSTNAME] = CCS_MAC_CATEGORY_CAPABILITY,
++ [CCS_MAC_CAPABILITY_USE_KERNEL_MODULE] = CCS_MAC_CATEGORY_CAPABILITY,
++ [CCS_MAC_CAPABILITY_SYS_KEXEC_LOAD] = CCS_MAC_CATEGORY_CAPABILITY,
++ [CCS_MAC_CAPABILITY_SYS_PTRACE] = CCS_MAC_CATEGORY_CAPABILITY,
++#endif
++};
++
++/* String table for operation mode. */
++static const char * const ccs_mode[CCS_CONFIG_MAX_MODE] = {
++ [CCS_CONFIG_DISABLED] = "disabled",
++ [CCS_CONFIG_LEARNING] = "learning",
++ [CCS_CONFIG_PERMISSIVE] = "permissive",
++ [CCS_CONFIG_ENFORCING] = "enforcing"
++};
++
++/* String table for /proc/ccs/profile interface. */
++static const char * const ccs_mac_keywords[CCS_MAX_MAC_INDEX
++ + CCS_MAX_MAC_CATEGORY_INDEX] = {
++ /* CONFIG::file group */
++ [CCS_MAC_FILE_EXECUTE] = "execute",
++ [CCS_MAC_FILE_OPEN] = "open",
++ [CCS_MAC_FILE_CREATE] = "create",
++ [CCS_MAC_FILE_UNLINK] = "unlink",
++#ifdef CONFIG_CCSECURITY_FILE_GETATTR
++ [CCS_MAC_FILE_GETATTR] = "getattr",
++#endif
++ [CCS_MAC_FILE_MKDIR] = "mkdir",
++ [CCS_MAC_FILE_RMDIR] = "rmdir",
++ [CCS_MAC_FILE_MKFIFO] = "mkfifo",
++ [CCS_MAC_FILE_MKSOCK] = "mksock",
++ [CCS_MAC_FILE_TRUNCATE] = "truncate",
++ [CCS_MAC_FILE_SYMLINK] = "symlink",
++ [CCS_MAC_FILE_MKBLOCK] = "mkblock",
++ [CCS_MAC_FILE_MKCHAR] = "mkchar",
++ [CCS_MAC_FILE_LINK] = "link",
++ [CCS_MAC_FILE_RENAME] = "rename",
++ [CCS_MAC_FILE_CHMOD] = "chmod",
++ [CCS_MAC_FILE_CHOWN] = "chown",
++ [CCS_MAC_FILE_CHGRP] = "chgrp",
++ [CCS_MAC_FILE_IOCTL] = "ioctl",
++ [CCS_MAC_FILE_CHROOT] = "chroot",
++ [CCS_MAC_FILE_MOUNT] = "mount",
++ [CCS_MAC_FILE_UMOUNT] = "unmount",
++ [CCS_MAC_FILE_PIVOT_ROOT] = "pivot_root",
++#ifdef CONFIG_CCSECURITY_MISC
++ /* CONFIG::misc group */
++ [CCS_MAC_ENVIRON] = "env",
++#endif
++#ifdef CONFIG_CCSECURITY_NETWORK
++ /* CONFIG::network group */
++ [CCS_MAC_NETWORK_INET_STREAM_BIND] = "inet_stream_bind",
++ [CCS_MAC_NETWORK_INET_STREAM_LISTEN] = "inet_stream_listen",
++ [CCS_MAC_NETWORK_INET_STREAM_CONNECT] = "inet_stream_connect",
++ [CCS_MAC_NETWORK_INET_STREAM_ACCEPT] = "inet_stream_accept",
++ [CCS_MAC_NETWORK_INET_DGRAM_BIND] = "inet_dgram_bind",
++ [CCS_MAC_NETWORK_INET_DGRAM_SEND] = "inet_dgram_send",
++#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
++ [CCS_MAC_NETWORK_INET_DGRAM_RECV] = "inet_dgram_recv",
++#endif
++ [CCS_MAC_NETWORK_INET_RAW_BIND] = "inet_raw_bind",
++ [CCS_MAC_NETWORK_INET_RAW_SEND] = "inet_raw_send",
++#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
++ [CCS_MAC_NETWORK_INET_RAW_RECV] = "inet_raw_recv",
++#endif
++ [CCS_MAC_NETWORK_UNIX_STREAM_BIND] = "unix_stream_bind",
++ [CCS_MAC_NETWORK_UNIX_STREAM_LISTEN] = "unix_stream_listen",
++ [CCS_MAC_NETWORK_UNIX_STREAM_CONNECT] = "unix_stream_connect",
++ [CCS_MAC_NETWORK_UNIX_STREAM_ACCEPT] = "unix_stream_accept",
++ [CCS_MAC_NETWORK_UNIX_DGRAM_BIND] = "unix_dgram_bind",
++ [CCS_MAC_NETWORK_UNIX_DGRAM_SEND] = "unix_dgram_send",
++#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
++ [CCS_MAC_NETWORK_UNIX_DGRAM_RECV] = "unix_dgram_recv",
++#endif
++ [CCS_MAC_NETWORK_UNIX_SEQPACKET_BIND] = "unix_seqpacket_bind",
++ [CCS_MAC_NETWORK_UNIX_SEQPACKET_LISTEN] = "unix_seqpacket_listen",
++ [CCS_MAC_NETWORK_UNIX_SEQPACKET_CONNECT] = "unix_seqpacket_connect",
++ [CCS_MAC_NETWORK_UNIX_SEQPACKET_ACCEPT] = "unix_seqpacket_accept",
++#endif
++#ifdef CONFIG_CCSECURITY_IPC
++ /* CONFIG::ipc group */
++ [CCS_MAC_SIGNAL] = "signal",
++#endif
++#ifdef CONFIG_CCSECURITY_CAPABILITY
++ /* CONFIG::capability group */
++ [CCS_MAC_CAPABILITY_USE_ROUTE_SOCKET] = "use_route",
++ [CCS_MAC_CAPABILITY_USE_PACKET_SOCKET] = "use_packet",
++ [CCS_MAC_CAPABILITY_SYS_REBOOT] = "SYS_REBOOT",
++ [CCS_MAC_CAPABILITY_SYS_VHANGUP] = "SYS_VHANGUP",
++ [CCS_MAC_CAPABILITY_SYS_SETTIME] = "SYS_TIME",
++ [CCS_MAC_CAPABILITY_SYS_NICE] = "SYS_NICE",
++ [CCS_MAC_CAPABILITY_SYS_SETHOSTNAME] = "SYS_SETHOSTNAME",
++ [CCS_MAC_CAPABILITY_USE_KERNEL_MODULE] = "use_kernel_module",
++ [CCS_MAC_CAPABILITY_SYS_KEXEC_LOAD] = "SYS_KEXEC_LOAD",
++ [CCS_MAC_CAPABILITY_SYS_PTRACE] = "SYS_PTRACE",
++#endif
++ /* CONFIG group */
++ [CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_FILE] = "file",
++#ifdef CONFIG_CCSECURITY_NETWORK
++ [CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_NETWORK] = "network",
++#endif
++#ifdef CONFIG_CCSECURITY_MISC
++ [CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_MISC] = "misc",
++#endif
++#ifdef CONFIG_CCSECURITY_IPC
++ [CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_IPC] = "ipc",
++#endif
++#ifdef CONFIG_CCSECURITY_CAPABILITY
++ [CCS_MAX_MAC_INDEX + CCS_MAC_CATEGORY_CAPABILITY] = "capability",
++#endif
++};
++
++/* String table for path operation. */
++static const char * const ccs_path_keyword[CCS_MAX_PATH_OPERATION] = {
++ [CCS_TYPE_EXECUTE] = "execute",
++ [CCS_TYPE_READ] = "read",
++ [CCS_TYPE_WRITE] = "write",
++ [CCS_TYPE_APPEND] = "append",
++ [CCS_TYPE_UNLINK] = "unlink",
++#ifdef CONFIG_CCSECURITY_FILE_GETATTR
++ [CCS_TYPE_GETATTR] = "getattr",
++#endif
++ [CCS_TYPE_RMDIR] = "rmdir",
++ [CCS_TYPE_TRUNCATE] = "truncate",
++ [CCS_TYPE_SYMLINK] = "symlink",
++ [CCS_TYPE_CHROOT] = "chroot",
++ [CCS_TYPE_UMOUNT] = "unmount",
++};
++
++#ifdef CONFIG_CCSECURITY_NETWORK
++
++/* String table for socket's operation. */
++static const char * const ccs_socket_keyword[CCS_MAX_NETWORK_OPERATION] = {
++ [CCS_NETWORK_BIND] = "bind",
++ [CCS_NETWORK_LISTEN] = "listen",
++ [CCS_NETWORK_CONNECT] = "connect",
++ [CCS_NETWORK_ACCEPT] = "accept",
++ [CCS_NETWORK_SEND] = "send",
++#ifdef CONFIG_CCSECURITY_NETWORK_RECVMSG
++ [CCS_NETWORK_RECV] = "recv",
++#endif
++};
++
++/* String table for socket's protocols. */
++static const char * const ccs_proto_keyword[CCS_SOCK_MAX] = {
++ [SOCK_STREAM] = "stream",
++ [SOCK_DGRAM] = "dgram",
++ [SOCK_RAW] = "raw",
++ [SOCK_SEQPACKET] = "seqpacket",
++ [0] = " ", /* Dummy for avoiding NULL pointer dereference. */
++ [4] = " ", /* Dummy for avoiding NULL pointer dereference. */
++};
++
++#endif
++
++/* String table for categories. */
++static const char * const ccs_category_keywords[CCS_MAX_MAC_CATEGORY_INDEX] = {
++ [CCS_MAC_CATEGORY_FILE] = "file",
++#ifdef CONFIG_CCSECURITY_NETWORK
++ [CCS_MAC_CATEGORY_NETWORK] = "network",
++#endif
++#ifdef CONFIG_CCSECURITY_MISC
++ [CCS_MAC_CATEGORY_MISC] = "misc",
++#endif
++#ifdef CONFIG_CCSECURITY_IPC
++ [CCS_MAC_CATEGORY_IPC] = "ipc",
++#endif
++#ifdef CONFIG_CCSECURITY_CAPABILITY
++ [CCS_MAC_CATEGORY_CAPABILITY] = "capability",
++#endif
++};
++
++/* String table for conditions. */
++static const char * const ccs_condition_keyword[CCS_MAX_CONDITION_KEYWORD] = {
++ [CCS_TASK_UID] = "task.uid",
++ [CCS_TASK_EUID] = "task.euid",
++ [CCS_TASK_SUID] = "task.suid",
++ [CCS_TASK_FSUID] = "task.fsuid",
++ [CCS_TASK_GID] = "task.gid",
++ [CCS_TASK_EGID] = "task.egid",
++ [CCS_TASK_SGID] = "task.sgid",
++ [CCS_TASK_FSGID] = "task.fsgid",
++ [CCS_TASK_PID] = "task.pid",
++ [CCS_TASK_PPID] = "task.ppid",
++ [CCS_EXEC_ARGC] = "exec.argc",
++ [CCS_EXEC_ENVC] = "exec.envc",
++ [CCS_TYPE_IS_SOCKET] = "socket",
++ [CCS_TYPE_IS_SYMLINK] = "symlink",
++ [CCS_TYPE_IS_FILE] = "file",
++ [CCS_TYPE_IS_BLOCK_DEV] = "block",
++ [CCS_TYPE_IS_DIRECTORY] = "directory",
++ [CCS_TYPE_IS_CHAR_DEV] = "char",
++ [CCS_TYPE_IS_FIFO] = "fifo",
++ [CCS_MODE_SETUID] = "setuid",
++ [CCS_MODE_SETGID] = "setgid",
++ [CCS_MODE_STICKY] = "sticky",
++ [CCS_MODE_OWNER_READ] = "owner_read",
++ [CCS_MODE_OWNER_WRITE] = "owner_write",
++ [CCS_MODE_OWNER_EXECUTE] = "owner_execute",
++ [CCS_MODE_GROUP_READ] = "group_read",
++ [CCS_MODE_GROUP_WRITE] = "group_write",
++ [CCS_MODE_GROUP_EXECUTE] = "group_execute",
++ [CCS_MODE_OTHERS_READ] = "others_read",
++ [CCS_MODE_OTHERS_WRITE] = "others_write",
++ [CCS_MODE_OTHERS_EXECUTE] = "others_execute",
++ [CCS_TASK_TYPE] = "task.type",
++ [CCS_TASK_EXECUTE_HANDLER] = "execute_handler",
++ [CCS_EXEC_REALPATH] = "exec.realpath",
++ [CCS_SYMLINK_TARGET] = "symlink.target",
++ [CCS_PATH1_UID] = "path1.uid",
++ [CCS_PATH1_GID] = "path1.gid",
++ [CCS_PATH1_INO] = "path1.ino",
++ [CCS_PATH1_MAJOR] = "path1.major",
++ [CCS_PATH1_MINOR] = "path1.minor",
++ [CCS_PATH1_PERM] = "path1.perm",
++ [CCS_PATH1_TYPE] = "path1.type",
++ [CCS_PATH1_DEV_MAJOR] = "path1.dev_major",
++ [CCS_PATH1_DEV_MINOR] = "path1.dev_minor",
++ [CCS_PATH2_UID] = "path2.uid",
++ [CCS_PATH2_GID] = "path2.gid",
++ [CCS_PATH2_INO] = "path2.ino",
++ [CCS_PATH2_MAJOR] = "path2.major",
++ [CCS_PATH2_MINOR] = "path2.minor",
++ [CCS_PATH2_PERM] = "path2.perm",
++ [CCS_PATH2_TYPE] = "path2.type",
++ [CCS_PATH2_DEV_MAJOR] = "path2.dev_major",
++ [CCS_PATH2_DEV_MINOR] = "path2.dev_minor",
++ [CCS_PATH1_PARENT_UID] = "path1.parent.uid",
++ [CCS_PATH1_PARENT_GID] = "path1.parent.gid",
++ [CCS_PATH1_PARENT_INO] = "path1.parent.ino",
++ [CCS_PATH1_PARENT_PERM] = "path1.parent.perm",
++ [CCS_PATH2_PARENT_UID] = "path2.parent.uid",
++ [CCS_PATH2_PARENT_GID] = "path2.parent.gid",
++ [CCS_PATH2_PARENT_INO] = "path2.parent.ino",
++ [CCS_PATH2_PARENT_PERM] = "path2.parent.perm",
++};
++
++/* String table for PREFERENCE keyword. */
++static const char * const ccs_pref_keywords[CCS_MAX_PREF] = {
++ [CCS_PREF_MAX_AUDIT_LOG] = "max_audit_log",
++ [CCS_PREF_MAX_LEARNING_ENTRY] = "max_learning_entry",
++ [CCS_PREF_ENFORCING_PENALTY] = "enforcing_penalty",
++};
++
++/* String table for domain flags. */
++const char * const ccs_dif[CCS_MAX_DOMAIN_INFO_FLAGS] = {
++ [CCS_DIF_QUOTA_WARNED] = "quota_exceeded\n",
++ [CCS_DIF_TRANSITION_FAILED] = "transition_failed\n",
++};
++
++/* String table for domain transition control keywords. */
++static const char * const ccs_transition_type[CCS_MAX_TRANSITION_TYPE] = {
++ [CCS_TRANSITION_CONTROL_NO_RESET] = "no_reset_domain ",
++ [CCS_TRANSITION_CONTROL_RESET] = "reset_domain ",
++ [CCS_TRANSITION_CONTROL_NO_INITIALIZE] = "no_initialize_domain ",
++ [CCS_TRANSITION_CONTROL_INITIALIZE] = "initialize_domain ",
++ [CCS_TRANSITION_CONTROL_NO_KEEP] = "no_keep_domain ",
++ [CCS_TRANSITION_CONTROL_KEEP] = "keep_domain ",
++};
++
++/* String table for grouping keywords. */
++static const char * const ccs_group_name[CCS_MAX_GROUP] = {
++ [CCS_PATH_GROUP] = "path_group ",
++ [CCS_NUMBER_GROUP] = "number_group ",
++#ifdef CONFIG_CCSECURITY_NETWORK
++ [CCS_ADDRESS_GROUP] = "address_group ",
++#endif
++};
++
++/* String table for /proc/ccs/stat interface. */
++static const char * const ccs_policy_headers[CCS_MAX_POLICY_STAT] = {
++ [CCS_STAT_POLICY_UPDATES] = "update:",
++ [CCS_STAT_POLICY_LEARNING] = "violation in learning mode:",
++ [CCS_STAT_POLICY_PERMISSIVE] = "violation in permissive mode:",
++ [CCS_STAT_POLICY_ENFORCING] = "violation in enforcing mode:",
++};
++
++/* String table for /proc/ccs/stat interface. */
++static const char * const ccs_memory_headers[CCS_MAX_MEMORY_STAT] = {
++ [CCS_MEMORY_POLICY] = "policy:",
++ [CCS_MEMORY_AUDIT] = "audit log:",
++ [CCS_MEMORY_QUERY] = "query message:",
++};
++
++/***** SECTION2: Structure definition *****/
++
++struct iattr;
++
++/* Structure for query. */
++struct ccs_query {
++ struct list_head list;
++ struct ccs_domain_info *domain;
++ char *query;
++ size_t query_len;
++ unsigned int serial;
++ u8 timer;
++ u8 answer;
++ u8 retry;
++};
++
++/* Structure for audit log. */
++struct ccs_log {
++ struct list_head list;
++ char *log;
++ int size;
++};
++
++/***** SECTION3: Prototype definition section *****/
++
++int ccs_audit_log(struct ccs_request_info *r);
++struct ccs_domain_info *ccs_assign_domain(const char *domainname,
++ const bool transit);
++u8 ccs_get_config(const u8 profile, const u8 index);
++void ccs_transition_failed(const char *domainname);
++void ccs_write_log(struct ccs_request_info *r, const char *fmt, ...);
++
++static bool ccs_correct_domain(const unsigned char *domainname);
++static bool ccs_correct_path(const char *filename);
++static bool ccs_correct_word(const char *string);
++static bool ccs_correct_word2(const char *string, size_t len);
++static bool ccs_domain_def(const unsigned char *buffer);
++static bool ccs_domain_quota_ok(struct ccs_request_info *r);
++static bool ccs_flush(struct ccs_io_buffer *head);
++static bool ccs_get_audit(const struct ccs_request_info *r);
++static bool ccs_has_more_namespace(struct ccs_io_buffer *head);
++static bool ccs_manager(void);
++static bool ccs_namespace_jump(const char *domainname);
++static bool ccs_parse_argv(char *left, char *right, struct ccs_argv *argv);
++static bool ccs_parse_envp(char *left, char *right, struct ccs_envp *envp);
++static bool ccs_parse_name_union(struct ccs_acl_param *param,
++ struct ccs_name_union *ptr);
++static bool ccs_parse_name_union_quoted(struct ccs_acl_param *param,
++ struct ccs_name_union *ptr);
++static bool ccs_parse_number_union(struct ccs_acl_param *param,
++ struct ccs_number_union *ptr);
++static bool ccs_permstr(const char *string, const char *keyword);
++static bool ccs_print_condition(struct ccs_io_buffer *head,
++ const struct ccs_condition *cond);
++static bool ccs_print_entry(struct ccs_io_buffer *head,
++ const struct ccs_acl_info *acl);
++static bool ccs_print_group(struct ccs_io_buffer *head,
++ const struct ccs_group *group);
++static bool ccs_read_acl(struct ccs_io_buffer *head, struct list_head *list);
++static bool ccs_read_group(struct ccs_io_buffer *head, const int idx);
++static bool ccs_read_policy(struct ccs_io_buffer *head, const int idx);
++static bool ccs_same_condition(const struct ccs_condition *a,
++ const struct ccs_condition *b);
++static bool ccs_select_domain(struct ccs_io_buffer *head, const char *data);
++static bool ccs_set_lf(struct ccs_io_buffer *head);
++static bool ccs_str_starts(char **src, const char *find);
++static char *ccs_get_transit_preference(struct ccs_acl_param *param,
++ struct ccs_condition *e);
++static char *ccs_init_log(struct ccs_request_info *r, int len, const char *fmt,
++ va_list args);
++static char *ccs_print_bprm(struct linux_binprm *bprm,
++ struct ccs_page_dump *dump);
++static char *ccs_print_header(struct ccs_request_info *r);
++static char *ccs_read_token(struct ccs_acl_param *param);
++static const char *ccs_yesno(const unsigned int value);
++static const struct ccs_path_info *ccs_get_domainname
++(struct ccs_acl_param *param);
++static const struct ccs_path_info *ccs_get_dqword(char *start);
++static int __init ccs_init_module(void);
++static int ccs_delete_domain(char *domainname);
++static int ccs_open(struct inode *inode, struct file *file);
++static int ccs_parse_policy(struct ccs_io_buffer *head, char *line);
++static int ccs_release(struct inode *inode, struct file *file);
++static int ccs_set_mode(char *name, const char *value,
++ struct ccs_profile *profile);
++static int ccs_supervisor(struct ccs_request_info *r, const char *fmt, ...)
++ __printf(2, 3);
++static int ccs_truncate(char *str);
++static int ccs_update_acl(const int size, struct ccs_acl_param *param);
++static int ccs_update_manager_entry(const char *manager, const bool is_delete);
++static int ccs_update_policy(const int size, struct ccs_acl_param *param);
++static int ccs_write_acl(struct ccs_policy_namespace *ns,
++ struct list_head *list, char *data,
++ const bool is_delete);
++static int ccs_write_aggregator(struct ccs_acl_param *param);
++static int ccs_write_answer(struct ccs_io_buffer *head);
++static int ccs_write_domain(struct ccs_io_buffer *head);
++static int ccs_write_exception(struct ccs_io_buffer *head);
++static int ccs_write_file(struct ccs_acl_param *param);
++static int ccs_write_group(struct ccs_acl_param *param, const u8 type);
++static int ccs_write_manager(struct ccs_io_buffer *head);
++static int ccs_write_pid(struct ccs_io_buffer *head);
++static int ccs_write_profile(struct ccs_io_buffer *head);
++static int ccs_write_stat(struct ccs_io_buffer *head);
++static int ccs_write_task(struct ccs_acl_param *param);
++static int ccs_write_transition_control(struct ccs_acl_param *param,
++ const u8 type);
++static s8 ccs_find_yesno(const char *string, const char *find);
++static ssize_t ccs_read(struct file *file, char __user *buf, size_t count,
++ loff_t *ppos);
++static ssize_t ccs_read_self(struct file *file, char __user *buf, size_t count,
++ loff_t *ppos);
++static ssize_t ccs_write(struct file *file, const char __user *buf,
++ size_t count, loff_t *ppos);
++static struct ccs_condition *ccs_commit_condition(struct ccs_condition *entry);
++static struct ccs_condition *ccs_get_condition(struct ccs_acl_param *param);
++static struct ccs_domain_info *ccs_find_domain(const char *domainname);
++static struct ccs_domain_info *ccs_find_domain_by_qid(unsigned int serial);
++static struct ccs_group *ccs_get_group(struct ccs_acl_param *param,
++ const u8 idx);
++static struct ccs_policy_namespace *ccs_assign_namespace
++(const char *domainname);
++static struct ccs_policy_namespace *ccs_find_namespace(const char *name,
++ const unsigned int len);
++static struct ccs_profile *ccs_assign_profile(struct ccs_policy_namespace *ns,
++ const unsigned int profile);
++static struct ccs_profile *ccs_profile(const u8 profile);
++static u8 ccs_condition_type(const char *word);
++static u8 ccs_make_byte(const u8 c1, const u8 c2, const u8 c3);
++static u8 ccs_parse_ulong(unsigned long *result, char **str);
++static unsigned int ccs_poll(struct file *file, poll_table *wait);
++static void __init ccs_create_entry(const char *name, const umode_t mode,
++ struct proc_dir_entry *parent,
++ const u8 key);
++static void __init ccs_load_builtin_policy(void);
++static void __init ccs_policy_io_init(void);
++static void __init ccs_proc_init(void);
++static void ccs_add_entry(char *header);
++static void ccs_addprintf(char *buffer, int len, const char *fmt, ...)
++ __printf(3, 4);
++static void ccs_addprintf(char *buffer, int len, const char *fmt, ...);
++static void ccs_check_profile(void);
++static void ccs_convert_time(time_t time, struct ccs_time *stamp);
++static void ccs_init_policy_namespace(struct ccs_policy_namespace *ns);
++static void ccs_io_printf(struct ccs_io_buffer *head, const char *fmt, ...)
++ __printf(2, 3);
++static void ccs_normalize_line(unsigned char *buffer);
++static void ccs_print_config(struct ccs_io_buffer *head, const u8 config);
++static void ccs_print_name_union(struct ccs_io_buffer *head,
++ const struct ccs_name_union *ptr);
++static void ccs_print_name_union_quoted(struct ccs_io_buffer *head,
++ const struct ccs_name_union *ptr);
++static void ccs_print_namespace(struct ccs_io_buffer *head);
++static void ccs_print_number_union(struct ccs_io_buffer *head,
++ const struct ccs_number_union *ptr);
++static void ccs_print_number_union_nospace(struct ccs_io_buffer *head,
++ const struct ccs_number_union *ptr);
++static void ccs_read_domain(struct ccs_io_buffer *head);
++static void ccs_read_exception(struct ccs_io_buffer *head);
++static void ccs_read_log(struct ccs_io_buffer *head);
++static void ccs_read_manager(struct ccs_io_buffer *head);
++static void ccs_read_pid(struct ccs_io_buffer *head);
++static void ccs_read_profile(struct ccs_io_buffer *head);
++static void ccs_read_query(struct ccs_io_buffer *head);
++static void ccs_read_stat(struct ccs_io_buffer *head);
++static void ccs_read_version(struct ccs_io_buffer *head);
++static void ccs_set_group(struct ccs_io_buffer *head, const char *category);
++static void ccs_set_namespace_cursor(struct ccs_io_buffer *head);
++static void ccs_set_slash(struct ccs_io_buffer *head);
++static void ccs_set_space(struct ccs_io_buffer *head);
++static void ccs_set_string(struct ccs_io_buffer *head, const char *string);
++static void ccs_set_uint(unsigned int *i, const char *string,
++ const char *find);
++static void ccs_update_stat(const u8 index);
++static void ccs_update_task_domain(struct ccs_request_info *r);
++static void ccs_write_log2(struct ccs_request_info *r, int len,
++ const char *fmt, va_list args);
++
++#ifdef CONFIG_CCSECURITY_PORTRESERVE
++static bool __ccs_lport_reserved(const u16 port);
++static int ccs_write_reserved_port(struct ccs_acl_param *param);
++#endif
++
++#ifdef CONFIG_CCSECURITY_NETWORK
++static bool ccs_parse_ipaddr_union(struct ccs_acl_param *param,
++ struct ccs_ipaddr_union *ptr);
++static int ccs_print_ipv4(char *buffer, const unsigned int buffer_len,
++ const u32 *ip);
++static int ccs_print_ipv6(char *buffer, const unsigned int buffer_len,
++ const struct in6_addr *ip);
++static int ccs_write_inet_network(struct ccs_acl_param *param);
++static int ccs_write_unix_network(struct ccs_acl_param *param);
++static void ccs_print_ip(char *buf, const unsigned int size,
++ const struct ccs_ipaddr_union *ptr);
++#endif
++
++#ifdef CONFIG_CCSECURITY_CAPABILITY
++static int ccs_write_capability(struct ccs_acl_param *param);
++#endif
++
++#ifdef CONFIG_CCSECURITY_MISC
++static int ccs_write_misc(struct ccs_acl_param *param);
++#endif
++
++#ifdef CONFIG_CCSECURITY_IPC
++static int ccs_write_ipc(struct ccs_acl_param *param);
++#endif
++
++#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
++static ssize_t ccs_write_self(struct file *file, const char __user *buf,
++ size_t count, loff_t *ppos);
++#endif
++
++/***** SECTION4: Standalone functions section *****/
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25)
++
++/**
++ * fatal_signal_pending - Check whether SIGKILL is pending or not.
++ *
++ * @p: Pointer to "struct task_struct".
++ *
++ * Returns true if SIGKILL is pending on @p, false otherwise.
++ *
++ * This is for compatibility with older kernels.
++ */
++#define fatal_signal_pending(p) (signal_pending(p) && \
++ sigismember(&p->pending.signal, SIGKILL))
++
++#endif
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
++
++/**
++ * __wait_event_interruptible_timeout - Sleep until a condition gets true or a timeout elapses.
++ *
++ * @wq: The waitqueue to wait on.
++ * @condition: A C expression for the event to wait for.
++ * @ret: Timeout, in jiffies.
++ *
++ * Returns 0 if the @timeout elapsed, -ERESTARTSYS if it was interrupted by a
++ * signal, and the remaining jiffies otherwise if the condition evaluated to
++ * true before the timeout elapsed.
++ *
++ * This is for compatibility with older kernels.
++ */
++#define __wait_event_interruptible_timeout(wq, condition, ret) \
++do { \
++ wait_queue_t __wait; \
++ init_waitqueue_entry(&__wait, current); \
++ \
++ add_wait_queue(&wq, &__wait); \
++ for (;;) { \
++ set_current_state(TASK_INTERRUPTIBLE); \
++ if (condition) \
++ break; \
++ if (!signal_pending(current)) { \
++ ret = schedule_timeout(ret); \
++ if (!ret) \
++ break; \
++ continue; \
++ } \
++ ret = -ERESTARTSYS; \
++ break; \
++ } \
++ current->state = TASK_RUNNING; \
++ remove_wait_queue(&wq, &__wait); \
++} while (0)
++
++/**
++ * wait_event_interruptible_timeout - Sleep until a condition gets true or a timeout elapses.
++ *
++ * @wq: The waitqueue to wait on.
++ * @condition: A C expression for the event to wait for.
++ * @timeout: Timeout, in jiffies.
++ *
++ * Returns 0 if the @timeout elapsed, -ERESTARTSYS if it was interrupted by a
++ * signal, and the remaining jiffies otherwise if the condition evaluated to
++ * true before the timeout elapsed.
++ *
++ * This is for compatibility with older kernels.
++ */
++#define wait_event_interruptible_timeout(wq, condition, timeout) \
++({ \
++ long __ret = timeout; \
++ if (!(condition)) \
++ __wait_event_interruptible_timeout(wq, condition, __ret); \
++ __ret; \
++})
++
++#endif
++
++/**
++ * ccs_convert_time - Convert time_t to YYYY/MM/DD hh/mm/ss.
++ *
++ * @time: Seconds since 1970/01/01 00:00:00.
++ * @stamp: Pointer to "struct ccs_time".
++ *
++ * Returns nothing.
++ *
++ * This function does not handle Y2038 problem.
++ */
++static void ccs_convert_time(time_t time, struct ccs_time *stamp)
++{
++ static const u16 ccs_eom[2][12] = {
++ { 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
++ { 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
++ };
++ u16 y;
++ u8 m;
++ bool r;
++ stamp->sec = time % 60;
++ time /= 60;
++ stamp->min = time % 60;
++ time /= 60;
++ stamp->hour = time % 24;
++ time /= 24;
++ for (y = 1970; ; y++) {
++ const unsigned short days = (y & 3) ? 365 : 366;
++ if (time < days)
++ break;
++ time -= days;
++ }
++ r = (y & 3) == 0;
++ for (m = 0; m < 11 && time >= ccs_eom[r][m]; m++);
++ if (m)
++ time -= ccs_eom[r][m - 1];
++ stamp->year = y;
++ stamp->month = ++m;
++ stamp->day = ++time;
++}
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 4, 23)
++#if !defined(RHEL_VERSION) || RHEL_VERSION != 3
++
++/**
++ * PDE - Get "struct proc_dir_entry".
++ *
++ * @inode: Pointer to "struct inode".
++ *
++ * Returns pointer to "struct proc_dir_entry".
++ *
++ * This is for compatibility with older kernels.
++ */
++static inline struct proc_dir_entry *PDE(const struct inode *inode)
++{
++ return (struct proc_dir_entry *) inode->u.generic_ip;
++}
++
++#endif
++#endif
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
++
++/**
++ * proc_notify_change - Update inode's attributes and reflect to the dentry.
++ *
++ * @dentry: Pointer to "struct dentry".
++ * @iattr: Pointer to "struct iattr".
++ *
++ * Returns 0 on success, negative value otherwise.
++ *
++ * The 2.4 kernels don't allow chmod()/chown() for files in /proc,
++ * while the 2.6 kernels allow.
++ * To permit management of /proc/ccs/ interface by non-root user,
++ * I modified to allow chmod()/chown() of /proc/ccs/ interface like 2.6 kernels
++ * by adding "struct inode_operations"->setattr hook.
++ */
++static int proc_notify_change(struct dentry *dentry, struct iattr *iattr)
++{
++ struct inode *inode = dentry->d_inode;
++ struct proc_dir_entry *de = PDE(inode);
++ int error;
++
++ error = inode_change_ok(inode, iattr);
++ if (error)
++ goto out;
++
++ error = inode_setattr(inode, iattr);
++ if (error)
++ goto out;
++
++ de->uid = inode->i_uid;
++ de->gid = inode->i_gid;
++ de->mode = inode->i_mode;
++out:
++ return error;
++}
++
++#endif
++
++#ifdef CONFIG_CCSECURITY_NETWORK
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19) && defined(CONFIG_NET)
++#define ccs_in4_pton in4_pton
++#define ccs_in6_pton in6_pton
++#else
++/*
++ * Routines for parsing IPv4 or IPv6 address.
++ * These are copied from lib/hexdump.c net/core/utils.c .
++ */
++#include <linux/ctype.h>
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 35)
++static int hex_to_bin(char ch)
++{
++ if ((ch >= '0') && (ch <= '9'))
++ return ch - '0';
++ ch = tolower(ch);
++ if ((ch >= 'a') && (ch <= 'f'))
++ return ch - 'a' + 10;
++ return -1;
++}
++#endif
++
++#define IN6PTON_XDIGIT 0x00010000
++#define IN6PTON_DIGIT 0x00020000
++#define IN6PTON_COLON_MASK 0x00700000
++#define IN6PTON_COLON_1 0x00100000 /* single : requested */
++#define IN6PTON_COLON_2 0x00200000 /* second : requested */
++#define IN6PTON_COLON_1_2 0x00400000 /* :: requested */
++#define IN6PTON_DOT 0x00800000 /* . */
++#define IN6PTON_DELIM 0x10000000
++#define IN6PTON_NULL 0x20000000 /* first/tail */
++#define IN6PTON_UNKNOWN 0x40000000
++
++static inline int xdigit2bin(char c, int delim)
++{
++ int val;
++
++ if (c == delim || c == '\0')
++ return IN6PTON_DELIM;
++ if (c == ':')
++ return IN6PTON_COLON_MASK;
++ if (c == '.')
++ return IN6PTON_DOT;
++
++ val = hex_to_bin(c);
++ if (val >= 0)
++ return val | IN6PTON_XDIGIT | (val < 10 ? IN6PTON_DIGIT : 0);
++
++ if (delim == -1)
++ return IN6PTON_DELIM;
++ return IN6PTON_UNKNOWN;
++}
++
++static int ccs_in4_pton(const char *src, int srclen, u8 *dst, int delim,
++ const char **end)
++{
++ const char *s;
++ u8 *d;
++ u8 dbuf[4];
++ int ret = 0;
++ int i;
++ int w = 0;
++
++ if (srclen < 0)
++ srclen = strlen(src);
++ s = src;
++ d = dbuf;
++ i = 0;
++ while (1) {
++ int c;
++ c = xdigit2bin(srclen > 0 ? *s : '\0', delim);
++ if (!(c & (IN6PTON_DIGIT | IN6PTON_DOT | IN6PTON_DELIM |
++ IN6PTON_COLON_MASK)))
++ goto out;
++ if (c & (IN6PTON_DOT | IN6PTON_DELIM | IN6PTON_COLON_MASK)) {
++ if (w == 0)
++ goto out;
++ *d++ = w & 0xff;
++ w = 0;
++ i++;
++ if (c & (IN6PTON_DELIM | IN6PTON_COLON_MASK)) {
++ if (i != 4)
++ goto out;
++ break;
++ }
++ goto cont;
++ }
++ w = (w * 10) + c;
++ if ((w & 0xffff) > 255)
++ goto out;
++cont:
++ if (i >= 4)
++ goto out;
++ s++;
++ srclen--;
++ }
++ ret = 1;
++ memcpy(dst, dbuf, sizeof(dbuf));
++out:
++ if (end)
++ *end = s;
++ return ret;
++}
++
++static int ccs_in6_pton(const char *src, int srclen, u8 *dst, int delim,
++ const char **end)
++{
++ const char *s, *tok = NULL;
++ u8 *d, *dc = NULL;
++ u8 dbuf[16];
++ int ret = 0;
++ int i;
++ int state = IN6PTON_COLON_1_2 | IN6PTON_XDIGIT | IN6PTON_NULL;
++ int w = 0;
++
++ memset(dbuf, 0, sizeof(dbuf));
++
++ s = src;
++ d = dbuf;
++ if (srclen < 0)
++ srclen = strlen(src);
++
++ while (1) {
++ int c;
++
++ c = xdigit2bin(srclen > 0 ? *s : '\0', delim);
++ if (!(c & state))
++ goto out;
++ if (c & (IN6PTON_DELIM | IN6PTON_COLON_MASK)) {
++ /* process one 16-bit word */
++ if (!(state & IN6PTON_NULL)) {
++ *d++ = (w >> 8) & 0xff;
++ *d++ = w & 0xff;
++ }
++ w = 0;
++ if (c & IN6PTON_DELIM) {
++ /* We've processed last word */
++ break;
++ }
++ /*
++ * COLON_1 => XDIGIT
++ * COLON_2 => XDIGIT|DELIM
++ * COLON_1_2 => COLON_2
++ */
++ switch (state & IN6PTON_COLON_MASK) {
++ case IN6PTON_COLON_2:
++ dc = d;
++ state = IN6PTON_XDIGIT | IN6PTON_DELIM;
++ if (dc - dbuf >= sizeof(dbuf))
++ state |= IN6PTON_NULL;
++ break;
++ case IN6PTON_COLON_1|IN6PTON_COLON_1_2:
++ state = IN6PTON_XDIGIT | IN6PTON_COLON_2;
++ break;
++ case IN6PTON_COLON_1:
++ state = IN6PTON_XDIGIT;
++ break;
++ case IN6PTON_COLON_1_2:
++ state = IN6PTON_COLON_2;
++ break;
++ default:
++ state = 0;
++ }
++ tok = s + 1;
++ goto cont;
++ }
++
++ if (c & IN6PTON_DOT) {
++ ret = ccs_in4_pton(tok ? tok : s, srclen +
++ (int)(s - tok), d, delim, &s);
++ if (ret > 0) {
++ d += 4;
++ break;
++ }
++ goto out;
++ }
++
++ w = (w << 4) | (0xff & c);
++ state = IN6PTON_COLON_1 | IN6PTON_DELIM;
++ if (!(w & 0xf000))
++ state |= IN6PTON_XDIGIT;
++ if (!dc && d + 2 < dbuf + sizeof(dbuf)) {
++ state |= IN6PTON_COLON_1_2;
++ state &= ~IN6PTON_DELIM;
++ }
++ if (d + 2 >= dbuf + sizeof(dbuf))
++ state &= ~(IN6PTON_COLON_1|IN6PTON_COLON_1_2);
++cont:
++ if ((dc && d + 4 < dbuf + sizeof(dbuf)) ||
++ d + 4 == dbuf + sizeof(dbuf))
++ state |= IN6PTON_DOT;
++ if (d >= dbuf + sizeof(dbuf))
++ state &= ~(IN6PTON_XDIGIT|IN6PTON_COLON_MASK);
++ s++;
++ srclen--;
++ }
++
++ i = 15; d--;
++
++ if (dc) {
++ while (d >= dc)
++ dst[i--] = *d--;
++ while (i >= dc - dbuf)
++ dst[i--] = 0;
++ while (i >= 0)
++ dst[i--] = *d--;
++ } else
++ memcpy(dst, dbuf, sizeof(dbuf));
++
++ ret = 1;
++out:
++ if (end)
++ *end = s;
++ return ret;
++}
++#endif
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 32)
++
++/*
++ * Routines for printing IPv4 or IPv6 address.
++ * These are copied from include/linux/kernel.h include/net/ipv6.h
++ * include/net/addrconf.h lib/hexdump.c lib/vsprintf.c and simplified.
++ */
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26)
++#if !defined(RHEL_MAJOR) || RHEL_MAJOR != 5 || !defined(RHEL_MINOR) || RHEL_MINOR < 9
++static const char hex_asc[] = "0123456789abcdef";
++#define hex_asc_lo(x) hex_asc[((x) & 0x0f)]
++#define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4]
++
++static inline char *pack_hex_byte(char *buf, u8 byte)
++{
++ *buf++ = hex_asc_hi(byte);
++ *buf++ = hex_asc_lo(byte);
++ return buf;
++}
++#endif
++#endif
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 24)
++static inline int ipv6_addr_v4mapped(const struct in6_addr *a)
++{
++ return (a->s6_addr32[0] | a->s6_addr32[1] |
++ (a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0;
++}
++#endif
++
++static inline int ipv6_addr_is_isatap(const struct in6_addr *addr)
++{
++ return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
++}
++
++static char *ip4_string(char *p, const u8 *addr)
++{
++ /*
++ * Since this function is called outside vsnprintf(), I can use
++ * sprintf() here.
++ */
++ return p +
++ sprintf(p, "%u.%u.%u.%u", addr[0], addr[1], addr[2], addr[3]);
++}
++
++static char *ip6_compressed_string(char *p, const char *addr)
++{
++ int i, j, range;
++ unsigned char zerolength[8];
++ int longest = 1;
++ int colonpos = -1;
++ u16 word;
++ u8 hi, lo;
++ bool needcolon = false;
++ bool useIPv4;
++ struct in6_addr in6;
++
++ memcpy(&in6, addr, sizeof(struct in6_addr));
++
++ useIPv4 = ipv6_addr_v4mapped(&in6) || ipv6_addr_is_isatap(&in6);
++
++ memset(zerolength, 0, sizeof(zerolength));
++
++ if (useIPv4)
++ range = 6;
++ else
++ range = 8;
++
++ /* find position of longest 0 run */
++ for (i = 0; i < range; i++) {
++ for (j = i; j < range; j++) {
++ if (in6.s6_addr16[j] != 0)
++ break;
++ zerolength[i]++;
++ }
++ }
++ for (i = 0; i < range; i++) {
++ if (zerolength[i] > longest) {
++ longest = zerolength[i];
++ colonpos = i;
++ }
++ }
++ if (longest == 1) /* don't compress a single 0 */
++ colonpos = -1;
++
++ /* emit address */
++ for (i = 0; i < range; i++) {
++ if (i == colonpos) {
++ if (needcolon || i == 0)
++ *p++ = ':';
++ *p++ = ':';
++ needcolon = false;
++ i += longest - 1;
++ continue;
++ }
++ if (needcolon) {
++ *p++ = ':';
++ needcolon = false;
++ }
++ /* hex u16 without leading 0s */
++ word = ntohs(in6.s6_addr16[i]);
++ hi = word >> 8;
++ lo = word & 0xff;
++ if (hi) {
++ if (hi > 0x0f)
++ p = pack_hex_byte(p, hi);
++ else
++ *p++ = hex_asc_lo(hi);
++ p = pack_hex_byte(p, lo);
++ } else if (lo > 0x0f)
++ p = pack_hex_byte(p, lo);
++ else
++ *p++ = hex_asc_lo(lo);
++ needcolon = true;
++ }
++
++ if (useIPv4) {
++ if (needcolon)
++ *p++ = ':';
++ p = ip4_string(p, &in6.s6_addr[12]);
++ }
++ *p = '\0';
++
++ return p;
++}
++#endif
++
++/**
++ * ccs_print_ipv4 - Print an IPv4 address.
++ *
++ * @buffer: Buffer to write to.
++ * @buffer_len: Size of @buffer.
++ * @ip: Pointer to "u32 in network byte order".
++ *
++ * Returns written length.
++ */
++static int ccs_print_ipv4(char *buffer, const unsigned int buffer_len,
++ const u32 *ip)
++{
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 32)
++ return snprintf(buffer, buffer_len, "%pI4", ip);
++#else
++ char addr[sizeof("255.255.255.255")];
++ ip4_string(addr, (const u8 *) ip);
++ return snprintf(buffer, buffer_len, "%s", addr);
++#endif
++}
++
++/**
++ * ccs_print_ipv6 - Print an IPv6 address.
++ *
++ * @buffer: Buffer to write to.
++ * @buffer_len: Size of @buffer.
++ * @ip: Pointer to "struct in6_addr".
++ *
++ * Returns written length.
++ */
++static int ccs_print_ipv6(char *buffer, const unsigned int buffer_len,
++ const struct in6_addr *ip)
++{
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 32)
++ return snprintf(buffer, buffer_len, "%pI6c", ip);
++#else
++ char addr[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255")];
++ ip6_compressed_string(addr, (const u8 *) ip);
++ return snprintf(buffer, buffer_len, "%s", addr);
++#endif
++}
++
++/**
++ * ccs_print_ip - Print an IP address.
++ *
++ * @buf: Buffer to write to.
++ * @size: Size of @buf.
++ * @ptr: Pointer to "struct ipaddr_union".
++ *
++ * Returns nothing.
++ */
++static void ccs_print_ip(char *buf, const unsigned int size,
++ const struct ccs_ipaddr_union *ptr)
++{
++ int len;
++ if (ptr->is_ipv6)
++ len = ccs_print_ipv6(buf, size, &ptr->ip[0]);
++ else
++ len = ccs_print_ipv4(buf, size, &ptr->ip[0].s6_addr32[0]);
++ if (!memcmp(&ptr->ip[0], &ptr->ip[1], 16) || len >= size / 2)
++ return;
++ buf[len++] = '-';
++ if (ptr->is_ipv6)
++ ccs_print_ipv6(buf + len, size - len, &ptr->ip[1]);
++ else
++ ccs_print_ipv4(buf + len, size - len,
++ &ptr->ip[1].s6_addr32[0]);
++}
++
++#endif
++
++/***** SECTION5: Variables definition section *****/
++
++/* Permit policy management by non-root user? */
++static bool ccs_manage_by_non_root;
++
++/* Lock for protecting policy. */
++DEFINE_MUTEX(ccs_policy_lock);
++
++/* Has /sbin/init started? */
++bool ccs_policy_loaded;
++
++/* List of namespaces. */
++LIST_HEAD(ccs_namespace_list);
++/* True if namespace other than ccs_kernel_namespace is defined. */
++static bool ccs_namespace_enabled;
++
++/* Initial namespace.*/
++static struct ccs_policy_namespace ccs_kernel_namespace;
++
++/* List of "struct ccs_condition". */
++LIST_HEAD(ccs_condition_list);
++
++#ifdef CONFIG_CCSECURITY_PORTRESERVE
++/* Bitmap for reserved local port numbers.*/
++static u8 ccs_reserved_port_map[8192];
++#endif
++
++/* Wait queue for kernel -> userspace notification. */
++static DECLARE_WAIT_QUEUE_HEAD(ccs_query_wait);
++/* Wait queue for userspace -> kernel notification. */
++static DECLARE_WAIT_QUEUE_HEAD(ccs_answer_wait);
++
++/* The list for "struct ccs_query". */
++static LIST_HEAD(ccs_query_list);
++
++/* Lock for manipulating ccs_query_list. */
++static DEFINE_SPINLOCK(ccs_query_list_lock);
++
++/* Number of "struct file" referring /proc/ccs/query interface. */
++static atomic_t ccs_query_observers = ATOMIC_INIT(0);
++
++/* Wait queue for /proc/ccs/audit. */
++static DECLARE_WAIT_QUEUE_HEAD(ccs_log_wait);
++
++/* The list for "struct ccs_log". */
++static LIST_HEAD(ccs_log);
++
++/* Lock for "struct list_head ccs_log". */
++static DEFINE_SPINLOCK(ccs_log_lock);
++
++/* Length of "stuct list_head ccs_log". */
++static unsigned int ccs_log_count;
++
++/* Timestamp counter for last updated. */
++static unsigned int ccs_stat_updated[CCS_MAX_POLICY_STAT];
++
++/* Counter for number of updates. */
++static unsigned int ccs_stat_modified[CCS_MAX_POLICY_STAT];
++
++/* Operations for /proc/ccs/self_domain interface. */
++static
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 17)
++const
++#endif
++struct file_operations ccs_self_operations = {
++#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
++ .write = ccs_write_self,
++#endif
++ .read = ccs_read_self,
++};
++
++/* Operations for /proc/ccs/ interface. */
++static
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 17)
++const
++#endif
++struct file_operations ccs_operations = {
++ .open = ccs_open,
++ .release = ccs_release,
++ .poll = ccs_poll,
++ .read = ccs_read,
++ .write = ccs_write,
++};
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
++
++/* The inode operations for /proc/ccs/ directory. */
++static struct inode_operations ccs_dir_inode_operations;
++
++/* The inode operations for files under /proc/ccs/ directory. */
++static struct inode_operations ccs_file_inode_operations;
++
++#endif
++
++/***** SECTION6: Dependent functions section *****/
++
++/**
++ * list_for_each_cookie - iterate over a list with cookie.
++ *
++ * @pos: Pointer to "struct list_head".
++ * @head: Pointer to "struct list_head".
++ */
++#define list_for_each_cookie(pos, head) \
++ for (pos = pos ? pos : srcu_dereference((head)->next, &ccs_ss); \
++ pos != (head); pos = srcu_dereference(pos->next, &ccs_ss))
++
++/**
++ * ccs_read_token - Read a word from a line.
++ *
++ * @param: Pointer to "struct ccs_acl_param".
++ *
++ * Returns a word on success, "" otherwise.
++ *
++ * To allow the caller to skip NULL check, this function returns "" rather than
++ * NULL if there is no more words to read.
++ */
++static char *ccs_read_token(struct ccs_acl_param *param)
++{
++ char *pos = param->data;
++ char *del = strchr(pos, ' ');
++ if (del)
++ *del++ = '\0';
++ else
++ del = pos + strlen(pos);
++ param->data = del;
++ return pos;
++}
++
++/**
++ * ccs_make_byte - Make byte value from three octal characters.
++ *
++ * @c1: The first character.
++ * @c2: The second character.
++ * @c3: The third character.
++ *
++ * Returns byte value.
++ */
++static u8 ccs_make_byte(const u8 c1, const u8 c2, const u8 c3)
++{
++ return ((c1 - '0') << 6) + ((c2 - '0') << 3) + (c3 - '0');
++}
++
++/**
++ * ccs_correct_word2 - Check whether the given string follows the naming rules.
++ *
++ * @string: The byte sequence to check. Not '\0'-terminated.
++ * @len: Length of @string.
++ *
++ * Returns true if @string follows the naming rules, false otherwise.
++ */
++static bool ccs_correct_word2(const char *string, size_t len)
++{
++ const char *const start = string;
++ bool in_repetition = false;
++ unsigned char c;
++ unsigned char d;
++ unsigned char e;
++ if (!len)
++ goto out;
++ while (len--) {
++ c = *string++;
++ if (c == '\\') {
++ if (!len--)
++ goto out;
++ c = *string++;
++ switch (c) {
++ case '\\': /* "\\" */
++ continue;
++ case '$': /* "\$" */
++ case '+': /* "\+" */
++ case '?': /* "\?" */
++ case '*': /* "\*" */
++ case '@': /* "\@" */
++ case 'x': /* "\x" */
++ case 'X': /* "\X" */
++ case 'a': /* "\a" */
++ case 'A': /* "\A" */
++ case '-': /* "\-" */
++ continue;
++ case '{': /* "/\{" */
++ if (string - 3 < start || *(string - 3) != '/')
++ break;
++ in_repetition = true;
++ continue;
++ case '}': /* "\}/" */
++ if (*string != '/')
++ break;
++ if (!in_repetition)
++ break;
++ in_repetition = false;
++ continue;
++ case '0': /* "\ooo" */
++ case '1':
++ case '2':
++ case '3':
++ if (!len-- || !len--)
++ break;
++ d = *string++;
++ e = *string++;
++ if (d < '0' || d > '7' || e < '0' || e > '7')
++ break;
++ c = ccs_make_byte(c, d, e);
++ if (c <= ' ' || c >= 127)
++ continue;
++ }
++ goto out;
++ } else if (in_repetition && c == '/') {
++ goto out;
++ } else if (c <= ' ' || c >= 127) {
++ goto out;
++ }
++ }
++ if (in_repetition)
++ goto out;
++ return true;
++out:
++ return false;
++}
++
++/**
++ * ccs_correct_word - Check whether the given string follows the naming rules.
++ *
++ * @string: The string to check.
++ *
++ * Returns true if @string follows the naming rules, false otherwise.
++ */
++static bool ccs_correct_word(const char *string)
++{
++ return ccs_correct_word2(string, strlen(string));
++}
++
++/**
++ * ccs_get_group - Allocate memory for "struct ccs_path_group"/"struct ccs_number_group"/"struct ccs_address_group".
++ *
++ * @param: Pointer to "struct ccs_acl_param".
++ * @idx: Index number.
++ *
++ * Returns pointer to "struct ccs_group" on success, NULL otherwise.
++ */
++static struct ccs_group *ccs_get_group(struct ccs_acl_param *param,
++ const u8 idx)
++{
++ struct ccs_group e = { };
++ struct ccs_group *group = NULL;
++ struct list_head *list;
++ const char *group_name = ccs_read_token(param);
++ bool found = false;
++ if (!ccs_correct_word(group_name) || idx >= CCS_MAX_GROUP)
++ return NULL;
++ e.group_name = ccs_get_name(group_name);
++ if (!e.group_name)
++ return NULL;
++ if (mutex_lock_interruptible(&ccs_policy_lock))
++ goto out;
++ list = ¶m->ns->group_list[idx];
++ list_for_each_entry(group, list, head.list) {
++ if (e.group_name != group->group_name ||
++ atomic_read(&group->head.users) == CCS_GC_IN_PROGRESS)
++ continue;
++ atomic_inc(&group->head.users);
++ found = true;
++ break;
++ }
++ if (!found) {
++ struct ccs_group *entry = ccs_commit_ok(&e, sizeof(e));
++ if (entry) {
++ INIT_LIST_HEAD(&entry->member_list);
++ atomic_set(&entry->head.users, 1);
++ list_add_tail_rcu(&entry->head.list, list);
++ group = entry;
++ found = true;
++ }
++ }
++ mutex_unlock(&ccs_policy_lock);
++out:
++ ccs_put_name(e.group_name);
++ return found ? group : NULL;
++}
++
++/**
++ * ccs_parse_name_union - Parse a ccs_name_union.
++ *
++ * @param: Pointer to "struct ccs_acl_param".
++ * @ptr: Pointer to "struct ccs_name_union".
++ *
++ * Returns true on success, false otherwise.
++ */
++static bool ccs_parse_name_union(struct ccs_acl_param *param,
++ struct ccs_name_union *ptr)
++{
++ char *filename;
++ if (param->data[0] == '@') {
++ param->data++;
++ ptr->group = ccs_get_group(param, CCS_PATH_GROUP);
++ return ptr->group != NULL;
++ }
++ filename = ccs_read_token(param);
++ if (!ccs_correct_word(filename))
++ return false;
++ ptr->filename = ccs_get_name(filename);
++ return ptr->filename != NULL;
++}
++
++/**
++ * ccs_parse_ulong - Parse an "unsigned long" value.
++ *
++ * @result: Pointer to "unsigned long".
++ * @str: Pointer to string to parse.
++ *
++ * Returns one of values in "enum ccs_value_type".
++ *
++ * The @src is updated to point the first character after the value
++ * on success.
++ */
++static u8 ccs_parse_ulong(unsigned long *result, char **str)
++{
++ const char *cp = *str;
++ char *ep;
++ int base = 10;
++ if (*cp == '0') {
++ char c = *(cp + 1);
++ if (c == 'x' || c == 'X') {
++ base = 16;
++ cp += 2;
++ } else if (c >= '0' && c <= '7') {
++ base = 8;
++ cp++;
++ }
++ }
++ *result = simple_strtoul(cp, &ep, base);
++ if (cp == ep)
++ return CCS_VALUE_TYPE_INVALID;
++ *str = ep;
++ switch (base) {
++ case 16:
++ return CCS_VALUE_TYPE_HEXADECIMAL;
++ case 8:
++ return CCS_VALUE_TYPE_OCTAL;
++ default:
++ return CCS_VALUE_TYPE_DECIMAL;
++ }
++}
++
++/**
++ * ccs_parse_number_union - Parse a ccs_number_union.
++ *
++ * @param: Pointer to "struct ccs_acl_param".
++ * @ptr: Pointer to "struct ccs_number_union".
++ *
++ * Returns true on success, false otherwise.
++ */
++static bool ccs_parse_number_union(struct ccs_acl_param *param,
++ struct ccs_number_union *ptr)
++{
++ char *data;
++ u8 type;
++ unsigned long v;
++ memset(ptr, 0, sizeof(*ptr));
++ if (param->data[0] == '@') {
++ param->data++;
++ ptr->group = ccs_get_group(param, CCS_NUMBER_GROUP);
++ return ptr->group != NULL;
++ }
++ data = ccs_read_token(param);
++ type = ccs_parse_ulong(&v, &data);
++ if (type == CCS_VALUE_TYPE_INVALID)
++ return false;
++ ptr->values[0] = v;
++ ptr->value_type[0] = type;
++ if (!*data) {
++ ptr->values[1] = v;
++ ptr->value_type[1] = type;
++ return true;
++ }
++ if (*data++ != '-')
++ return false;
++ type = ccs_parse_ulong(&v, &data);
++ if (type == CCS_VALUE_TYPE_INVALID || *data || ptr->values[0] > v)
++ return false;
++ ptr->values[1] = v;
++ ptr->value_type[1] = type;
++ return true;
++}
++
++#ifdef CONFIG_CCSECURITY_NETWORK
++
++/**
++ * ccs_parse_ipaddr_union - Parse an IP address.
++ *
++ * @param: Pointer to "struct ccs_acl_param".
++ * @ptr: Pointer to "struct ccs_ipaddr_union".
++ *
++ * Returns true on success, false otherwise.
++ */
++static bool ccs_parse_ipaddr_union(struct ccs_acl_param *param,
++ struct ccs_ipaddr_union *ptr)
++{
++ u8 * const min = ptr->ip[0].in6_u.u6_addr8;
++ u8 * const max = ptr->ip[1].in6_u.u6_addr8;
++ char *address = ccs_read_token(param);
++ const char *end;
++ if (!strchr(address, ':') &&
++ ccs_in4_pton(address, -1, min, '-', &end) > 0) {
++ ptr->is_ipv6 = false;
++ if (!*end)
++ ptr->ip[1].s6_addr32[0] = ptr->ip[0].s6_addr32[0];
++ else if (*end++ != '-' ||
++ ccs_in4_pton(end, -1, max, '\0', &end) <= 0 || *end)
++ return false;
++ return true;
++ }
++ if (ccs_in6_pton(address, -1, min, '-', &end) > 0) {
++ ptr->is_ipv6 = true;
++ if (!*end)
++ memmove(max, min, sizeof(u16) * 8);
++ else if (*end++ != '-' ||
++ ccs_in6_pton(end, -1, max, '\0', &end) <= 0 || *end)
++ return false;
++ return true;
++ }
++ return false;
++}
++
++#endif
++
++/**
++ * ccs_get_dqword - ccs_get_name() for a quoted string.
++ *
++ * @start: String to save.
++ *
++ * Returns pointer to "struct ccs_path_info" on success, NULL otherwise.
++ */
++static const struct ccs_path_info *ccs_get_dqword(char *start)
++{
++ char *cp = start + strlen(start) - 1;
++ if (cp == start || *start++ != '"' || *cp != '"')
++ return NULL;
++ *cp = '\0';
++ if (*start && !ccs_correct_word(start))
++ return NULL;
++ return ccs_get_name(start);
++}
++
++/**
++ * ccs_parse_name_union_quoted - Parse a quoted word.
++ *
++ * @param: Pointer to "struct ccs_acl_param".
++ * @ptr: Pointer to "struct ccs_name_union".
++ *
++ * Returns true on success, false otherwise.
++ */
++static bool ccs_parse_name_union_quoted(struct ccs_acl_param *param,
++ struct ccs_name_union *ptr)
++{
++ char *filename = param->data;
++ if (*filename == '@')
++ return ccs_parse_name_union(param, ptr);
++ ptr->filename = ccs_get_dqword(filename);
++ return ptr->filename != NULL;
++}
++
++/**
++ * ccs_parse_argv - Parse an argv[] condition part.
++ *
++ * @left: Lefthand value.
++ * @right: Righthand value.
++ * @argv: Pointer to "struct ccs_argv".
++ *
++ * Returns true on success, false otherwise.
++ */
++static bool ccs_parse_argv(char *left, char *right, struct ccs_argv *argv)
++{
++ if (ccs_parse_ulong(&argv->index, &left) != CCS_VALUE_TYPE_DECIMAL ||
++ *left++ != ']' || *left)
++ return false;
++ argv->value = ccs_get_dqword(right);
++ return argv->value != NULL;
++}
++
++/**
++ * ccs_parse_envp - Parse an envp[] condition part.
++ *
++ * @left: Lefthand value.
++ * @right: Righthand value.
++ * @envp: Pointer to "struct ccs_envp".
++ *
++ * Returns true on success, false otherwise.
++ */
++static bool ccs_parse_envp(char *left, char *right, struct ccs_envp *envp)
++{
++ const struct ccs_path_info *name;
++ const struct ccs_path_info *value;
++ char *cp = left + strlen(left) - 1;
++ if (*cp-- != ']' || *cp != '"')
++ goto out;
++ *cp = '\0';
++ if (!ccs_correct_word(left))
++ goto out;
++ name = ccs_get_name(left);
++ if (!name)
++ goto out;
++ if (!strcmp(right, "NULL")) {
++ value = NULL;
++ } else {
++ value = ccs_get_dqword(right);
++ if (!value) {
++ ccs_put_name(name);
++ goto out;
++ }
++ }
++ envp->name = name;
++ envp->value = value;
++ return true;
++out:
++ return false;
++}
++
++/**
++ * ccs_same_condition - Check for duplicated "struct ccs_condition" entry.
++ *
++ * @a: Pointer to "struct ccs_condition".
++ * @b: Pointer to "struct ccs_condition".
++ *
++ * Returns true if @a == @b, false otherwise.
++ */
++static bool ccs_same_condition(const struct ccs_condition *a,
++ const struct ccs_condition *b)
++{
++ return a->size == b->size && a->condc == b->condc &&
++ a->numbers_count == b->numbers_count &&
++ a->names_count == b->names_count &&
++ a->argc == b->argc && a->envc == b->envc &&
++ a->grant_log == b->grant_log &&
++ a->exec_transit == b->exec_transit && a->transit == b->transit
++ && !memcmp(a + 1, b + 1, a->size - sizeof(*a));
++}
++
++/**
++ * ccs_condition_type - Get condition type.
++ *
++ * @word: Keyword string.
++ *
++ * Returns one of values in "enum ccs_conditions_index" on success,
++ * CCS_MAX_CONDITION_KEYWORD otherwise.
++ */
++static u8 ccs_condition_type(const char *word)
++{
++ u8 i;
++ for (i = 0; i < CCS_MAX_CONDITION_KEYWORD; i++) {
++ if (!strcmp(word, ccs_condition_keyword[i]))
++ break;
++ }
++ return i;
++}
++
++/**
++ * ccs_commit_condition - Commit "struct ccs_condition".
++ *
++ * @entry: Pointer to "struct ccs_condition".
++ *
++ * Returns pointer to "struct ccs_condition" on success, NULL otherwise.
++ *
++ * This function merges duplicated entries. This function returns NULL if
++ * @entry is not duplicated but memory quota for policy has exceeded.
++ */
++static struct ccs_condition *ccs_commit_condition(struct ccs_condition *entry)
++{
++ struct ccs_condition *ptr;
++ bool found = false;
++ if (mutex_lock_interruptible(&ccs_policy_lock)) {
++ dprintk(KERN_WARNING "%u: %s failed\n", __LINE__, __func__);
++ ptr = NULL;
++ found = true;
++ goto out;
++ }
++ list_for_each_entry(ptr, &ccs_condition_list, head.list) {
++ if (!ccs_same_condition(ptr, entry) ||
++ atomic_read(&ptr->head.users) == CCS_GC_IN_PROGRESS)
++ continue;
++ /* Same entry found. Share this entry. */
++ atomic_inc(&ptr->head.users);
++ found = true;
++ break;
++ }
++ if (!found) {
++ if (ccs_memory_ok(entry, entry->size)) {
++ atomic_set(&entry->head.users, 1);
++ list_add(&entry->head.list, &ccs_condition_list);
++ } else {
++ found = true;
++ ptr = NULL;
++ }
++ }
++ mutex_unlock(&ccs_policy_lock);
++out:
++ if (found) {
++ ccs_del_condition(&entry->head.list);
++ kfree(entry);
++ entry = ptr;
++ }
++ return entry;
++}
++
++/**
++ * ccs_correct_path - Check whether the given pathname follows the naming rules.
++ *
++ * @filename: The pathname to check.
++ *
++ * Returns true if @filename follows the naming rules, false otherwise.
++ */
++static bool ccs_correct_path(const char *filename)
++{
++ return *filename == '/' && ccs_correct_word(filename);
++}
++
++/**
++ * ccs_domain_def - Check whether the given token can be a domainname.
++ *
++ * @buffer: The token to check.
++ *
++ * Returns true if @buffer possibly be a domainname, false otherwise.
++ */
++static bool ccs_domain_def(const unsigned char *buffer)
++{
++ const unsigned char *cp;
++ int len;
++ if (*buffer != '<')
++ return false;
++ cp = strchr(buffer, ' ');
++ if (!cp)
++ len = strlen(buffer);
++ else
++ len = cp - buffer;
++ if (buffer[len - 1] != '>' || !ccs_correct_word2(buffer + 1, len - 2))
++ return false;
++ return true;
++}
++
++/**
++ * ccs_correct_domain - Check whether the given domainname follows the naming rules.
++ *
++ * @domainname: The domainname to check.
++ *
++ * Returns true if @domainname follows the naming rules, false otherwise.
++ */
++static bool ccs_correct_domain(const unsigned char *domainname)
++{
++ if (!domainname || !ccs_domain_def(domainname))
++ return false;
++ domainname = strchr(domainname, ' ');
++ if (!domainname++)
++ return true;
++ while (1) {
++ const unsigned char *cp = strchr(domainname, ' ');
++ if (!cp)
++ break;
++ if (*domainname != '/' ||
++ !ccs_correct_word2(domainname, cp - domainname))
++ return false;
++ domainname = cp + 1;
++ }
++ return ccs_correct_path(domainname);
++}
++
++/**
++ * ccs_normalize_line - Format string.
++ *
++ * @buffer: The line to normalize.
++ *
++ * Returns nothing.
++ *
++ * Leading and trailing whitespaces are removed.
++ * Multiple whitespaces are packed into single space.
++ */
++static void ccs_normalize_line(unsigned char *buffer)
++{
++ unsigned char *sp = buffer;
++ unsigned char *dp = buffer;
++ bool first = true;
++ while (*sp && (*sp <= ' ' || *sp >= 127))
++ sp++;
++ while (*sp) {
++ if (!first)
++ *dp++ = ' ';
++ first = false;
++ while (*sp > ' ' && *sp < 127)
++ *dp++ = *sp++;
++ while (*sp && (*sp <= ' ' || *sp >= 127))
++ sp++;
++ }
++ *dp = '\0';
++}
++
++/**
++ * ccs_get_domainname - Read a domainname from a line.
++ *
++ * @param: Pointer to "struct ccs_acl_param".
++ *
++ * Returns a domainname on success, NULL otherwise.
++ */
++static const struct ccs_path_info *ccs_get_domainname
++(struct ccs_acl_param *param)
++{
++ char *start = param->data;
++ char *pos = start;
++ while (*pos) {
++ if (*pos++ != ' ' || *pos++ == '/')
++ continue;
++ pos -= 2;
++ *pos++ = '\0';
++ break;
++ }
++ param->data = pos;
++ if (ccs_correct_domain(start))
++ return ccs_get_name(start);
++ return NULL;
++}
++
++/**
++ * ccs_get_transit_preference - Parse domain transition preference for execve().
++ *
++ * @param: Pointer to "struct ccs_acl_param".
++ * @e: Pointer to "struct ccs_condition".
++ *
++ * Returns the condition string part.
++ */
++static char *ccs_get_transit_preference(struct ccs_acl_param *param,
++ struct ccs_condition *e)
++{
++ char * const pos = param->data;
++ bool flag;
++ if (*pos == '<') {
++ e->transit = ccs_get_domainname(param);
++ goto done;
++ }
++ {
++ char *cp = strchr(pos, ' ');
++ if (cp)
++ *cp = '\0';
++ flag = ccs_correct_path(pos) || !strcmp(pos, "keep") ||
++ !strcmp(pos, "initialize") || !strcmp(pos, "reset") ||
++ !strcmp(pos, "child") || !strcmp(pos, "parent");
++ if (cp)
++ *cp = ' ';
++ }
++ if (!flag)
++ return pos;
++ e->transit = ccs_get_name(ccs_read_token(param));
++done:
++ if (e->transit) {
++ e->exec_transit = true;
++ return param->data;
++ }
++ /*
++ * Return a bad read-only condition string that will let
++ * ccs_get_condition() return NULL.
++ */
++ return "/";
++}
++
++/**
++ * ccs_get_condition - Parse condition part.
++ *
++ * @param: Pointer to "struct ccs_acl_param".
++ *
++ * Returns pointer to "struct ccs_condition" on success, NULL otherwise.
++ */
++struct ccs_condition *ccs_get_condition(struct ccs_acl_param *param)
++{
++ struct ccs_condition *entry = NULL;
++ struct ccs_condition_element *condp = NULL;
++ struct ccs_number_union *numbers_p = NULL;
++ struct ccs_name_union *names_p = NULL;
++ struct ccs_argv *argv = NULL;
++ struct ccs_envp *envp = NULL;
++ struct ccs_condition e = { };
++ char * const start_of_string = ccs_get_transit_preference(param, &e);
++ char * const end_of_string = start_of_string + strlen(start_of_string);
++ char *pos;
++rerun:
++ pos = start_of_string;
++ while (1) {
++ u8 left = -1;
++ u8 right = -1;
++ char *left_word = pos;
++ char *cp;
++ char *right_word;
++ bool is_not;
++ if (!*left_word)
++ break;
++ /*
++ * Since left-hand condition does not allow use of "path_group"
++ * or "number_group" and environment variable's names do not
++ * accept '=', it is guaranteed that the original line consists
++ * of one or more repetition of $left$operator$right blocks
++ * where "$left is free from '=' and ' '" and "$operator is
++ * either '=' or '!='" and "$right is free from ' '".
++ * Therefore, we can reconstruct the original line at the end
++ * of dry run even if we overwrite $operator with '\0'.
++ */
++ cp = strchr(pos, ' ');
++ if (cp) {
++ *cp = '\0'; /* Will restore later. */
++ pos = cp + 1;
++ } else {
++ pos = "";
++ }
++ right_word = strchr(left_word, '=');
++ if (!right_word || right_word == left_word)
++ goto out;
++ is_not = *(right_word - 1) == '!';
++ if (is_not)
++ *(right_word++ - 1) = '\0'; /* Will restore later. */
++ else if (*(right_word + 1) != '=')
++ *right_word++ = '\0'; /* Will restore later. */
++ else
++ goto out;
++ dprintk(KERN_WARNING "%u: <%s>%s=<%s>\n", __LINE__, left_word,
++ is_not ? "!" : "", right_word);
++ if (!strcmp(left_word, "grant_log")) {
++ if (entry) {
++ if (is_not ||
++ entry->grant_log != CCS_GRANTLOG_AUTO)
++ goto out;
++ else if (!strcmp(right_word, "yes"))
++ entry->grant_log = CCS_GRANTLOG_YES;
++ else if (!strcmp(right_word, "no"))
++ entry->grant_log = CCS_GRANTLOG_NO;
++ else
++ goto out;
++ }
++ continue;
++ }
++ if (!strcmp(left_word, "auto_domain_transition")) {
++ if (entry) {
++ if (is_not || entry->transit)
++ goto out;
++ entry->transit = ccs_get_dqword(right_word);
++ if (!entry->transit ||
++ (entry->transit->name[0] != '/' &&
++ !ccs_domain_def(entry->transit->name)))
++ goto out;
++ }
++ continue;
++ }
++ if (!strncmp(left_word, "exec.argv[", 10)) {
++ if (!argv) {
++ e.argc++;
++ e.condc++;
++ } else {
++ e.argc--;
++ e.condc--;
++ left = CCS_ARGV_ENTRY;
++ argv->is_not = is_not;
++ if (!ccs_parse_argv(left_word + 10,
++ right_word, argv++))
++ goto out;
++ }
++ goto store_value;
++ }
++ if (!strncmp(left_word, "exec.envp[\"", 11)) {
++ if (!envp) {
++ e.envc++;
++ e.condc++;
++ } else {
++ e.envc--;
++ e.condc--;
++ left = CCS_ENVP_ENTRY;
++ envp->is_not = is_not;
++ if (!ccs_parse_envp(left_word + 11,
++ right_word, envp++))
++ goto out;
++ }
++ goto store_value;
++ }
++ left = ccs_condition_type(left_word);
++ dprintk(KERN_WARNING "%u: <%s> left=%u\n", __LINE__, left_word,
++ left);
++ if (left == CCS_MAX_CONDITION_KEYWORD) {
++ if (!numbers_p) {
++ e.numbers_count++;
++ } else {
++ e.numbers_count--;
++ left = CCS_NUMBER_UNION;
++ param->data = left_word;
++ if (*left_word == '@' ||
++ !ccs_parse_number_union(param,
++ numbers_p++))
++ goto out;
++ }
++ }
++ if (!condp)
++ e.condc++;
++ else
++ e.condc--;
++ if (left == CCS_EXEC_REALPATH || left == CCS_SYMLINK_TARGET) {
++ if (!names_p) {
++ e.names_count++;
++ } else {
++ e.names_count--;
++ right = CCS_NAME_UNION;
++ param->data = right_word;
++ if (!ccs_parse_name_union_quoted(param,
++ names_p++))
++ goto out;
++ }
++ goto store_value;
++ }
++ right = ccs_condition_type(right_word);
++ if (right == CCS_MAX_CONDITION_KEYWORD) {
++ if (!numbers_p) {
++ e.numbers_count++;
++ } else {
++ e.numbers_count--;
++ right = CCS_NUMBER_UNION;
++ param->data = right_word;
++ if (!ccs_parse_number_union(param,
++ numbers_p++))
++ goto out;
++ }
++ }
++store_value:
++ if (!condp) {
++ dprintk(KERN_WARNING "%u: dry_run left=%u right=%u "
++ "match=%u\n", __LINE__, left, right, !is_not);
++ continue;
++ }
++ condp->left = left;
++ condp->right = right;
++ condp->equals = !is_not;
++ dprintk(KERN_WARNING "%u: left=%u right=%u match=%u\n",
++ __LINE__, condp->left, condp->right,
++ condp->equals);
++ condp++;
++ }
++ dprintk(KERN_INFO "%u: cond=%u numbers=%u names=%u ac=%u ec=%u\n",
++ __LINE__, e.condc, e.numbers_count, e.names_count, e.argc,
++ e.envc);
++ if (entry) {
++ BUG_ON(e.names_count | e.numbers_count | e.argc | e.envc |
++ e.condc);
++ return ccs_commit_condition(entry);
++ }
++ e.size = sizeof(*entry)
++ + e.condc * sizeof(struct ccs_condition_element)
++ + e.numbers_count * sizeof(struct ccs_number_union)
++ + e.names_count * sizeof(struct ccs_name_union)
++ + e.argc * sizeof(struct ccs_argv)
++ + e.envc * sizeof(struct ccs_envp);
++ entry = kzalloc(e.size, CCS_GFP_FLAGS);
++ if (!entry)
++ goto out2;
++ *entry = e;
++ e.transit = NULL;
++ condp = (struct ccs_condition_element *) (entry + 1);
++ numbers_p = (struct ccs_number_union *) (condp + e.condc);
++ names_p = (struct ccs_name_union *) (numbers_p + e.numbers_count);
++ argv = (struct ccs_argv *) (names_p + e.names_count);
++ envp = (struct ccs_envp *) (argv + e.argc);
++ {
++ bool flag = false;
++ for (pos = start_of_string; pos < end_of_string; pos++) {
++ if (*pos)
++ continue;
++ if (flag) /* Restore " ". */
++ *pos = ' ';
++ else if (*(pos + 1) == '=') /* Restore "!=". */
++ *pos = '!';
++ else /* Restore "=". */
++ *pos = '=';
++ flag = !flag;
++ }
++ }
++ goto rerun;
++out:
++ dprintk(KERN_WARNING "%u: %s failed\n", __LINE__, __func__);
++ if (entry) {
++ ccs_del_condition(&entry->head.list);
++ kfree(entry);
++ }
++out2:
++ ccs_put_name(e.transit);
++ return NULL;
++}
++
++/**
++ * ccs_yesno - Return "yes" or "no".
++ *
++ * @value: Bool value.
++ *
++ * Returns "yes" if @value is not 0, "no" otherwise.
++ */
++static const char *ccs_yesno(const unsigned int value)
++{
++ return value ? "yes" : "no";
++}
++
++/**
++ * ccs_addprintf - strncat()-like-snprintf().
++ *
++ * @buffer: Buffer to write to. Must be '\0'-terminated.
++ * @len: Size of @buffer.
++ * @fmt: The printf()'s format string, followed by parameters.
++ *
++ * Returns nothing.
++ */
++static void ccs_addprintf(char *buffer, int len, const char *fmt, ...)
++{
++ va_list args;
++ const int pos = strlen(buffer);
++ va_start(args, fmt);
++ vsnprintf(buffer + pos, len - pos - 1, fmt, args);
++ va_end(args);
++}
++
++/**
++ * ccs_flush - Flush queued string to userspace's buffer.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ *
++ * Returns true if all data was flushed, false otherwise.
++ */
++static bool ccs_flush(struct ccs_io_buffer *head)
++{
++ while (head->r.w_pos) {
++ const char *w = head->r.w[0];
++ size_t len = strlen(w);
++ if (len) {
++ if (len > head->read_user_buf_avail)
++ len = head->read_user_buf_avail;
++ if (!len)
++ return false;
++ if (copy_to_user(head->read_user_buf, w, len))
++ return false;
++ head->read_user_buf_avail -= len;
++ head->read_user_buf += len;
++ w += len;
++ }
++ head->r.w[0] = w;
++ if (*w)
++ return false;
++ /* Add '\0' for audit logs and query. */
++ if (head->type == CCS_AUDIT || head->type == CCS_QUERY) {
++ if (!head->read_user_buf_avail ||
++ copy_to_user(head->read_user_buf, "", 1))
++ return false;
++ head->read_user_buf_avail--;
++ head->read_user_buf++;
++ }
++ head->r.w_pos--;
++ for (len = 0; len < head->r.w_pos; len++)
++ head->r.w[len] = head->r.w[len + 1];
++ }
++ head->r.avail = 0;
++ return true;
++}
++
++/**
++ * ccs_set_string - Queue string to "struct ccs_io_buffer" structure.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ * @string: String to print.
++ *
++ * Returns nothing.
++ *
++ * Note that @string has to be kept valid until @head is kfree()d.
++ * This means that char[] allocated on stack memory cannot be passed to
++ * this function. Use ccs_io_printf() for char[] allocated on stack memory.
++ */
++static void ccs_set_string(struct ccs_io_buffer *head, const char *string)
++{
++ if (head->r.w_pos < CCS_MAX_IO_READ_QUEUE) {
++ head->r.w[head->r.w_pos++] = string;
++ ccs_flush(head);
++ } else
++ printk(KERN_WARNING "Too many words in a line.\n");
++}
++
++/**
++ * ccs_io_printf - printf() to "struct ccs_io_buffer" structure.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ * @fmt: The printf()'s format string, followed by parameters.
++ *
++ * Returns nothing.
++ */
++static void ccs_io_printf(struct ccs_io_buffer *head, const char *fmt, ...)
++{
++ va_list args;
++ size_t len;
++ size_t pos = head->r.avail;
++ int size = head->readbuf_size - pos;
++ if (size <= 0)
++ return;
++ va_start(args, fmt);
++ len = vsnprintf(head->read_buf + pos, size, fmt, args) + 1;
++ va_end(args);
++ if (pos + len >= head->readbuf_size) {
++ printk(KERN_WARNING "Too many words in a line.\n");
++ return;
++ }
++ head->r.avail += len;
++ ccs_set_string(head, head->read_buf + pos);
++}
++
++/**
++ * ccs_set_space - Put a space to "struct ccs_io_buffer" structure.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ *
++ * Returns nothing.
++ */
++static void ccs_set_space(struct ccs_io_buffer *head)
++{
++ ccs_set_string(head, " ");
++}
++
++/**
++ * ccs_set_lf - Put a line feed to "struct ccs_io_buffer" structure.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ *
++ * Returns true if all data was flushed, false otherwise.
++ */
++static bool ccs_set_lf(struct ccs_io_buffer *head)
++{
++ ccs_set_string(head, "\n");
++ return !head->r.w_pos;
++}
++
++/**
++ * ccs_set_slash - Put a shash to "struct ccs_io_buffer" structure.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ *
++ * Returns nothing.
++ */
++static void ccs_set_slash(struct ccs_io_buffer *head)
++{
++ ccs_set_string(head, "/");
++}
++
++/**
++ * ccs_init_policy_namespace - Initialize namespace.
++ *
++ * @ns: Pointer to "struct ccs_policy_namespace".
++ *
++ * Returns nothing.
++ */
++static void ccs_init_policy_namespace(struct ccs_policy_namespace *ns)
++{
++ unsigned int idx;
++ for (idx = 0; idx < CCS_MAX_ACL_GROUPS; idx++)
++ INIT_LIST_HEAD(&ns->acl_group[idx]);
++ for (idx = 0; idx < CCS_MAX_GROUP; idx++)
++ INIT_LIST_HEAD(&ns->group_list[idx]);
++ for (idx = 0; idx < CCS_MAX_POLICY; idx++)
++ INIT_LIST_HEAD(&ns->policy_list[idx]);
++ ns->profile_version = 20150505;
++ ccs_namespace_enabled = !list_empty(&ccs_namespace_list);
++ list_add_tail_rcu(&ns->namespace_list, &ccs_namespace_list);
++}
++
++/**
++ * ccs_print_namespace - Print namespace header.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ *
++ * Returns nothing.
++ */
++static void ccs_print_namespace(struct ccs_io_buffer *head)
++{
++ if (!ccs_namespace_enabled)
++ return;
++ ccs_set_string(head,
++ container_of(head->r.ns, struct ccs_policy_namespace,
++ namespace_list)->name);
++ ccs_set_space(head);
++}
++
++/**
++ * ccs_assign_profile - Create a new profile.
++ *
++ * @ns: Pointer to "struct ccs_policy_namespace".
++ * @profile: Profile number to create.
++ *
++ * Returns pointer to "struct ccs_profile" on success, NULL otherwise.
++ */
++static struct ccs_profile *ccs_assign_profile(struct ccs_policy_namespace *ns,
++ const unsigned int profile)
++{
++ struct ccs_profile *ptr;
++ struct ccs_profile *entry;
++ if (profile >= CCS_MAX_PROFILES)
++ return NULL;
++ ptr = ns->profile_ptr[profile];
++ if (ptr)
++ return ptr;
++ entry = kzalloc(sizeof(*entry), CCS_GFP_FLAGS);
++ if (mutex_lock_interruptible(&ccs_policy_lock))
++ goto out;
++ ptr = ns->profile_ptr[profile];
++ if (!ptr && ccs_memory_ok(entry, sizeof(*entry))) {
++ ptr = entry;
++ ptr->default_config = CCS_CONFIG_DISABLED |
++ CCS_CONFIG_WANT_GRANT_LOG | CCS_CONFIG_WANT_REJECT_LOG;
++ memset(ptr->config, CCS_CONFIG_USE_DEFAULT,
++ sizeof(ptr->config));
++ ptr->pref[CCS_PREF_MAX_AUDIT_LOG] =
++ CONFIG_CCSECURITY_MAX_AUDIT_LOG;
++ ptr->pref[CCS_PREF_MAX_LEARNING_ENTRY] =
++ CONFIG_CCSECURITY_MAX_ACCEPT_ENTRY;
++ mb(); /* Avoid out-of-order execution. */
++ ns->profile_ptr[profile] = ptr;
++ entry = NULL;
++ }
++ mutex_unlock(&ccs_policy_lock);
++out:
++ kfree(entry);
++ return ptr;
++}
++
++/**
++ * ccs_check_profile - Check all profiles currently assigned to domains are defined.
++ *
++ * Returns nothing.
++ */
++static void ccs_check_profile(void)
++{
++ struct ccs_domain_info *domain;
++ const int idx = ccs_read_lock();
++ ccs_policy_loaded = true;
++ printk(KERN_INFO "CCSecurity: 1.8.4 2015/05/05\n");
++ list_for_each_entry_srcu(domain, &ccs_domain_list, list, &ccs_ss) {
++ const u8 profile = domain->profile;
++ struct ccs_policy_namespace *ns = domain->ns;
++ if (ns->profile_version == 20100903) {
++ static bool done;
++ if (!done)
++ printk(KERN_INFO "Converting profile version "
++ "from %u to %u.\n", 20100903, 20150505);
++ done = true;
++ ns->profile_version = 20150505;
++ }
++ if (ns->profile_version != 20150505)
++ printk(KERN_ERR
++ "Profile version %u is not supported.\n",
++ ns->profile_version);
++ else if (!ns->profile_ptr[profile])
++ printk(KERN_ERR
++ "Profile %u (used by '%s') is not defined.\n",
++ profile, domain->domainname->name);
++ else
++ continue;
++ printk(KERN_ERR
++ "Userland tools for TOMOYO 1.8 must be installed and "
++ "policy must be initialized.\n");
++ printk(KERN_ERR "Please see http://tomoyo.osdn.jp/1.8/ "
++ "for more information.\n");
++ panic("STOP!");
++ }
++ ccs_read_unlock(idx);
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 2, 0) && defined(CONFIG_SECURITY)
++ ccsecurity_exports.add_hooks();
++#endif
++ printk(KERN_INFO "Mandatory Access Control activated.\n");
++}
++
++/**
++ * ccs_profile - Find a profile.
++ *
++ * @profile: Profile number to find.
++ *
++ * Returns pointer to "struct ccs_profile".
++ */
++static struct ccs_profile *ccs_profile(const u8 profile)
++{
++ static struct ccs_profile ccs_null_profile;
++ struct ccs_profile *ptr = ccs_current_namespace()->
++ profile_ptr[profile];
++ if (!ptr)
++ ptr = &ccs_null_profile;
++ return ptr;
++}
++
++/**
++ * ccs_get_config - Get config for specified profile's specified functionality.
++ *
++ * @profile: Profile number.
++ * @index: Index number of functionality.
++ *
++ * Returns config.
++ *
++ * First, check for CONFIG::category::functionality.
++ * If CONFIG::category::functionality is set to use default, then check
++ * CONFIG::category. If CONFIG::category is set to use default, then use
++ * CONFIG. CONFIG cannot be set to use default.
++ */
++u8 ccs_get_config(const u8 profile, const u8 index)
++{
++ u8 config;
++ const struct ccs_profile *p;
++ if (!ccs_policy_loaded)
++ return CCS_CONFIG_DISABLED;
++ p = ccs_profile(profile);
++ config = p->config[index];
++ if (config == CCS_CONFIG_USE_DEFAULT)
++ config = p->config[ccs_index2category[index]
++ + CCS_MAX_MAC_INDEX];
++ if (config == CCS_CONFIG_USE_DEFAULT)
++ config = p->default_config;
++ return config;
++}
++
++/**
++ * ccs_find_yesno - Find values for specified keyword.
++ *
++ * @string: String to check.
++ * @find: Name of keyword.
++ *
++ * Returns 1 if "@find=yes" was found, 0 if "@find=no" was found, -1 otherwise.
++ */
++static s8 ccs_find_yesno(const char *string, const char *find)
++{
++ const char *cp = strstr(string, find);
++ if (cp) {
++ cp += strlen(find);
++ if (!strncmp(cp, "=yes", 4))
++ return 1;
++ else if (!strncmp(cp, "=no", 3))
++ return 0;
++ }
++ return -1;
++}
++
++/**
++ * ccs_set_uint - Set value for specified preference.
++ *
++ * @i: Pointer to "unsigned int".
++ * @string: String to check.
++ * @find: Name of keyword.
++ *
++ * Returns nothing.
++ */
++static void ccs_set_uint(unsigned int *i, const char *string, const char *find)
++{
++ const char *cp = strstr(string, find);
++ if (cp)
++ sscanf(cp + strlen(find), "=%u", i);
++}
++
++/**
++ * ccs_str_starts - Check whether the given string starts with the given keyword.
++ *
++ * @src: Pointer to pointer to the string.
++ * @find: Pointer to the keyword.
++ *
++ * Returns true if @src starts with @find, false otherwise.
++ *
++ * The @src is updated to point the first character after the @find
++ * if @src starts with @find.
++ */
++static bool ccs_str_starts(char **src, const char *find)
++{
++ const int len = strlen(find);
++ char *tmp = *src;
++ if (strncmp(tmp, find, len))
++ return false;
++ tmp += len;
++ *src = tmp;
++ return true;
++}
++
++/**
++ * ccs_print_group - Print group's name.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ * @group: Pointer to "struct ccsgroup". Maybe NULL.
++ *
++ * Returns true if @group is not NULL. false otherwise.
++ */
++static bool ccs_print_group(struct ccs_io_buffer *head,
++ const struct ccs_group *group)
++{
++ if (group) {
++ ccs_set_string(head, "@");
++ ccs_set_string(head, group->group_name->name);
++ return true;
++ }
++ return false;
++}
++
++/**
++ * ccs_set_mode - Set mode for specified profile.
++ *
++ * @name: Name of functionality.
++ * @value: Mode for @name.
++ * @profile: Pointer to "struct ccs_profile".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_set_mode(char *name, const char *value,
++ struct ccs_profile *profile)
++{
++ u8 i;
++ u8 config;
++ if (!strcmp(name, "CONFIG")) {
++ i = CCS_MAX_MAC_INDEX + CCS_MAX_MAC_CATEGORY_INDEX;
++ config = profile->default_config;
++ } else if (ccs_str_starts(&name, "CONFIG::")) {
++ config = 0;
++ for (i = 0; i < CCS_MAX_MAC_INDEX + CCS_MAX_MAC_CATEGORY_INDEX;
++ i++) {
++ int len = 0;
++ if (i < CCS_MAX_MAC_INDEX) {
++ const u8 c = ccs_index2category[i];
++ const char *category =
++ ccs_category_keywords[c];
++ len = strlen(category);
++ if (strncmp(name, category, len) ||
++ name[len++] != ':' || name[len++] != ':')
++ continue;
++ }
++ if (strcmp(name + len, ccs_mac_keywords[i]))
++ continue;
++ config = profile->config[i];
++ break;
++ }
++ if (i == CCS_MAX_MAC_INDEX + CCS_MAX_MAC_CATEGORY_INDEX)
++ return -EINVAL;
++ } else {
++ return -EINVAL;
++ }
++ if (strstr(value, "use_default")) {
++ config = CCS_CONFIG_USE_DEFAULT;
++ } else {
++ u8 mode;
++ for (mode = 0; mode < CCS_CONFIG_MAX_MODE; mode++)
++ if (strstr(value, ccs_mode[mode]))
++ /*
++ * Update lower 3 bits in order to distinguish
++ * 'config' from 'CCS_CONFIG_USE_DEAFULT'.
++ */
++ config = (config & ~7) | mode;
++ if (config != CCS_CONFIG_USE_DEFAULT) {
++ switch (ccs_find_yesno(value, "grant_log")) {
++ case 1:
++ config |= CCS_CONFIG_WANT_GRANT_LOG;
++ break;
++ case 0:
++ config &= ~CCS_CONFIG_WANT_GRANT_LOG;
++ break;
++ }
++ switch (ccs_find_yesno(value, "reject_log")) {
++ case 1:
++ config |= CCS_CONFIG_WANT_REJECT_LOG;
++ break;
++ case 0:
++ config &= ~CCS_CONFIG_WANT_REJECT_LOG;
++ break;
++ }
++ }
++ }
++ if (i < CCS_MAX_MAC_INDEX + CCS_MAX_MAC_CATEGORY_INDEX)
++ profile->config[i] = config;
++ else if (config != CCS_CONFIG_USE_DEFAULT)
++ profile->default_config = config;
++ return 0;
++}
++
++/**
++ * ccs_write_profile - Write profile table.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_write_profile(struct ccs_io_buffer *head)
++{
++ char *data = head->write_buf;
++ unsigned int i;
++ char *cp;
++ struct ccs_profile *profile;
++ if (sscanf(data, "PROFILE_VERSION=%u", &head->w.ns->profile_version)
++ == 1)
++ return 0;
++ i = simple_strtoul(data, &cp, 10);
++ if (*cp != '-')
++ return -EINVAL;
++ data = cp + 1;
++ profile = ccs_assign_profile(head->w.ns, i);
++ if (!profile)
++ return -EINVAL;
++ cp = strchr(data, '=');
++ if (!cp)
++ return -EINVAL;
++ *cp++ = '\0';
++ if (!strcmp(data, "COMMENT")) {
++ static DEFINE_SPINLOCK(lock);
++ const struct ccs_path_info *new_comment = ccs_get_name(cp);
++ const struct ccs_path_info *old_comment;
++ if (!new_comment)
++ return -ENOMEM;
++ spin_lock(&lock);
++ old_comment = profile->comment;
++ profile->comment = new_comment;
++ spin_unlock(&lock);
++ ccs_put_name(old_comment);
++ return 0;
++ }
++ if (!strcmp(data, "PREFERENCE")) {
++ for (i = 0; i < CCS_MAX_PREF; i++)
++ ccs_set_uint(&profile->pref[i], cp,
++ ccs_pref_keywords[i]);
++ return 0;
++ }
++ return ccs_set_mode(data, cp, profile);
++}
++
++/**
++ * ccs_print_config - Print mode for specified functionality.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ * @config: Mode for that functionality.
++ *
++ * Returns nothing.
++ *
++ * Caller prints functionality's name.
++ */
++static void ccs_print_config(struct ccs_io_buffer *head, const u8 config)
++{
++ ccs_io_printf(head, "={ mode=%s grant_log=%s reject_log=%s }\n",
++ ccs_mode[config & 3],
++ ccs_yesno(config & CCS_CONFIG_WANT_GRANT_LOG),
++ ccs_yesno(config & CCS_CONFIG_WANT_REJECT_LOG));
++}
++
++/**
++ * ccs_read_profile - Read profile table.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ *
++ * Returns nothing.
++ */
++static void ccs_read_profile(struct ccs_io_buffer *head)
++{
++ u8 index;
++ struct ccs_policy_namespace *ns = container_of(head->r.ns, typeof(*ns),
++ namespace_list);
++ const struct ccs_profile *profile;
++ if (head->r.eof)
++ return;
++next:
++ index = head->r.index;
++ profile = ns->profile_ptr[index];
++ switch (head->r.step) {
++ case 0:
++ ccs_print_namespace(head);
++ ccs_io_printf(head, "PROFILE_VERSION=%u\n",
++ ns->profile_version);
++ head->r.step++;
++ break;
++ case 1:
++ for ( ; head->r.index < CCS_MAX_PROFILES; head->r.index++)
++ if (ns->profile_ptr[head->r.index])
++ break;
++ if (head->r.index == CCS_MAX_PROFILES) {
++ head->r.eof = true;
++ return;
++ }
++ head->r.step++;
++ break;
++ case 2:
++ {
++ u8 i;
++ const struct ccs_path_info *comment = profile->comment;
++ ccs_print_namespace(head);
++ ccs_io_printf(head, "%u-COMMENT=", index);
++ ccs_set_string(head, comment ? comment->name : "");
++ ccs_set_lf(head);
++ ccs_print_namespace(head);
++ ccs_io_printf(head, "%u-PREFERENCE={ ", index);
++ for (i = 0; i < CCS_MAX_PREF; i++)
++ ccs_io_printf(head, "%s=%u ",
++ ccs_pref_keywords[i],
++ profile->pref[i]);
++ ccs_set_string(head, "}\n");
++ head->r.step++;
++ }
++ break;
++ case 3:
++ {
++ ccs_print_namespace(head);
++ ccs_io_printf(head, "%u-%s", index, "CONFIG");
++ ccs_print_config(head, profile->default_config);
++ head->r.bit = 0;
++ head->r.step++;
++ }
++ break;
++ case 4:
++ for ( ; head->r.bit < CCS_MAX_MAC_INDEX
++ + CCS_MAX_MAC_CATEGORY_INDEX; head->r.bit++) {
++ const u8 i = head->r.bit;
++ const u8 config = profile->config[i];
++ if (config == CCS_CONFIG_USE_DEFAULT)
++ continue;
++ ccs_print_namespace(head);
++ if (i < CCS_MAX_MAC_INDEX)
++ ccs_io_printf(head, "%u-CONFIG::%s::%s", index,
++ ccs_category_keywords
++ [ccs_index2category[i]],
++ ccs_mac_keywords[i]);
++ else
++ ccs_io_printf(head, "%u-CONFIG::%s", index,
++ ccs_mac_keywords[i]);
++ ccs_print_config(head, config);
++ head->r.bit++;
++ break;
++ }
++ if (head->r.bit == CCS_MAX_MAC_INDEX
++ + CCS_MAX_MAC_CATEGORY_INDEX) {
++ head->r.index++;
++ head->r.step = 1;
++ }
++ break;
++ }
++ if (ccs_flush(head))
++ goto next;
++}
++
++/**
++ * ccs_update_policy - Update an entry for exception policy.
++ *
++ * @size: Size of new entry in bytes.
++ * @param: Pointer to "struct ccs_acl_param".
++ *
++ * Returns 0 on success, negative value otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static int ccs_update_policy(const int size, struct ccs_acl_param *param)
++{
++ struct ccs_acl_head *new_entry = ¶m->e.acl_head;
++ int error = param->is_delete ? -ENOENT : -ENOMEM;
++ struct ccs_acl_head *entry;
++ struct list_head *list = param->list;
++ BUG_ON(size < sizeof(*entry));
++ if (mutex_lock_interruptible(&ccs_policy_lock))
++ return -ENOMEM;
++ list_for_each_entry_srcu(entry, list, list, &ccs_ss) {
++ if (entry->is_deleted == CCS_GC_IN_PROGRESS)
++ continue;
++ if (memcmp(entry + 1, new_entry + 1, size - sizeof(*entry)))
++ continue;
++ entry->is_deleted = param->is_delete;
++ error = 0;
++ break;
++ }
++ if (error && !param->is_delete) {
++ entry = ccs_commit_ok(new_entry, size);
++ if (entry) {
++ list_add_tail_rcu(&entry->list, list);
++ error = 0;
++ }
++ }
++ mutex_unlock(&ccs_policy_lock);
++ return error;
++}
++
++/**
++ * ccs_update_manager_entry - Add a manager entry.
++ *
++ * @manager: The path to manager or the domainnamme.
++ * @is_delete: True if it is a delete request.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_update_manager_entry(const char *manager,
++ const bool is_delete)
++{
++ struct ccs_acl_param param = {
++ /* .ns = &ccs_kernel_namespace, */
++ .is_delete = is_delete,
++ .list = &ccs_kernel_namespace.policy_list[CCS_ID_MANAGER],
++ };
++ struct ccs_manager *e = ¶m.e.manager;
++ int error = is_delete ? -ENOENT : -ENOMEM;
++ /* Forced zero clear for using memcmp() at ccs_update_policy(). */
++ memset(¶m.e, 0, sizeof(param.e));
++ if (!ccs_correct_domain(manager) && !ccs_correct_word(manager))
++ return -EINVAL;
++ e->manager = ccs_get_name(manager);
++ if (e->manager) {
++ error = ccs_update_policy(sizeof(*e), ¶m);
++ ccs_put_name(e->manager);
++ }
++ return error;
++}
++
++/**
++ * ccs_write_manager - Write manager policy.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_write_manager(struct ccs_io_buffer *head)
++{
++ const char *data = head->write_buf;
++ if (!strcmp(data, "manage_by_non_root")) {
++ ccs_manage_by_non_root = !head->w.is_delete;
++ return 0;
++ }
++ return ccs_update_manager_entry(data, head->w.is_delete);
++}
++
++/**
++ * ccs_read_manager - Read manager policy.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ *
++ * Returns nothing.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static void ccs_read_manager(struct ccs_io_buffer *head)
++{
++ if (head->r.eof)
++ return;
++ list_for_each_cookie(head->r.acl, &ccs_kernel_namespace.
++ policy_list[CCS_ID_MANAGER]) {
++ struct ccs_manager *ptr =
++ list_entry(head->r.acl, typeof(*ptr), head.list);
++ if (ptr->head.is_deleted)
++ continue;
++ if (!ccs_flush(head))
++ return;
++ ccs_set_string(head, ptr->manager->name);
++ ccs_set_lf(head);
++ }
++ head->r.eof = true;
++}
++
++/**
++ * ccs_manager - Check whether the current process is a policy manager.
++ *
++ * Returns true if the current process is permitted to modify policy
++ * via /proc/ccs/ interface.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static bool ccs_manager(void)
++{
++ struct ccs_manager *ptr;
++ struct ccs_path_info exe;
++ struct ccs_security *task = ccs_current_security();
++ const struct ccs_path_info *domainname
++ = ccs_current_domain()->domainname;
++ bool found = false;
++ if (!ccs_policy_loaded)
++ return true;
++ if (task->ccs_flags & CCS_TASK_IS_MANAGER)
++ return true;
++ if (!ccs_manage_by_non_root &&
++ (!uid_eq(current_uid(), GLOBAL_ROOT_UID) ||
++ !uid_eq(current_euid(), GLOBAL_ROOT_UID)))
++ return false;
++ exe.name = ccs_get_exe();
++ if (!exe.name)
++ return false;
++ ccs_fill_path_info(&exe);
++ list_for_each_entry_srcu(ptr, &ccs_kernel_namespace.
++ policy_list[CCS_ID_MANAGER], head.list,
++ &ccs_ss) {
++ if (ptr->head.is_deleted)
++ continue;
++ if (ccs_pathcmp(domainname, ptr->manager) &&
++ ccs_pathcmp(&exe, ptr->manager))
++ continue;
++ /* Set manager flag. */
++ task->ccs_flags |= CCS_TASK_IS_MANAGER;
++ found = true;
++ break;
++ }
++ if (!found) { /* Reduce error messages. */
++ static pid_t ccs_last_pid;
++ const pid_t pid = current->pid;
++ if (ccs_last_pid != pid) {
++ printk(KERN_WARNING "%s ( %s ) is not permitted to "
++ "update policies.\n", domainname->name,
++ exe.name);
++ ccs_last_pid = pid;
++ }
++ }
++ kfree(exe.name);
++ return found;
++}
++
++/**
++ * ccs_find_domain - Find a domain by the given name.
++ *
++ * @domainname: The domainname to find.
++ *
++ * Returns pointer to "struct ccs_domain_info" if found, NULL otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static struct ccs_domain_info *ccs_find_domain(const char *domainname)
++{
++ struct ccs_domain_info *domain;
++ struct ccs_path_info name;
++ name.name = domainname;
++ ccs_fill_path_info(&name);
++ list_for_each_entry_srcu(domain, &ccs_domain_list, list, &ccs_ss) {
++ if (!domain->is_deleted &&
++ !ccs_pathcmp(&name, domain->domainname))
++ return domain;
++ }
++ return NULL;
++}
++
++/**
++ * ccs_select_domain - Parse select command.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ * @data: String to parse.
++ *
++ * Returns true on success, false otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static bool ccs_select_domain(struct ccs_io_buffer *head, const char *data)
++{
++ unsigned int pid;
++ struct ccs_domain_info *domain = NULL;
++ bool global_pid = false;
++ if (strncmp(data, "select ", 7))
++ return false;
++ data += 7;
++ if (sscanf(data, "pid=%u", &pid) == 1 ||
++ (global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) {
++ struct task_struct *p;
++ ccs_tasklist_lock();
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24)
++ if (global_pid)
++ p = ccsecurity_exports.find_task_by_pid_ns(pid,
++ &init_pid_ns);
++ else
++ p = ccsecurity_exports.find_task_by_vpid(pid);
++#else
++ p = find_task_by_pid(pid);
++#endif
++ if (p)
++ domain = ccs_task_domain(p);
++ ccs_tasklist_unlock();
++ } else if (!strncmp(data, "domain=", 7)) {
++ if (*(data + 7) == '<')
++ domain = ccs_find_domain(data + 7);
++ } else if (sscanf(data, "Q=%u", &pid) == 1) {
++ domain = ccs_find_domain_by_qid(pid);
++ } else
++ return false;
++ head->w.domain = domain;
++ /* Accessing read_buf is safe because head->io_sem is held. */
++ if (!head->read_buf)
++ return true; /* Do nothing if open(O_WRONLY). */
++ memset(&head->r, 0, sizeof(head->r));
++ head->r.print_this_domain_only = true;
++ if (domain)
++ head->r.domain = &domain->list;
++ else
++ head->r.eof = true;
++ ccs_io_printf(head, "# select %s\n", data);
++ if (domain && domain->is_deleted)
++ ccs_set_string(head, "# This is a deleted domain.\n");
++ return true;
++}
++
++/**
++ * ccs_update_acl - Update "struct ccs_acl_info" entry.
++ *
++ * @size: Size of new entry in bytes.
++ * @param: Pointer to "struct ccs_acl_param".
++ *
++ * Returns 0 on success, negative value otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static int ccs_update_acl(const int size, struct ccs_acl_param *param)
++{
++ struct ccs_acl_info *new_entry = ¶m->e.acl_info;
++ const bool is_delete = param->is_delete;
++ int error = is_delete ? -ENOENT : -ENOMEM;
++ struct ccs_acl_info *entry;
++ struct list_head * const list = param->list;
++ BUG_ON(size < sizeof(*entry));
++ if (param->data[0]) {
++ new_entry->cond = ccs_get_condition(param);
++ if (!new_entry->cond)
++ return -EINVAL;
++ /*
++ * Domain transition preference is allowed for only
++ * "file execute"/"task auto_execute_handler"/
++ * "task denied_auto_execute_handler" entries.
++ */
++ if (new_entry->cond->exec_transit &&
++ !(new_entry->type == CCS_TYPE_PATH_ACL &&
++ new_entry->perm == 1 << CCS_TYPE_EXECUTE)
++#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
++ && new_entry->type != CCS_TYPE_AUTO_EXECUTE_HANDLER &&
++ new_entry->type != CCS_TYPE_DENIED_EXECUTE_HANDLER
++#endif
++ )
++ return -EINVAL;
++ }
++ if (mutex_lock_interruptible(&ccs_policy_lock))
++ return -ENOMEM;
++ list_for_each_entry_srcu(entry, list, list, &ccs_ss) {
++ if (entry->is_deleted == CCS_GC_IN_PROGRESS)
++ continue;
++ if (entry->type != new_entry->type ||
++ entry->cond != new_entry->cond ||
++ memcmp(entry + 1, new_entry + 1, size - sizeof(*entry)))
++ continue;
++ if (is_delete)
++ entry->perm &= ~new_entry->perm;
++ else
++ entry->perm |= new_entry->perm;
++ entry->is_deleted = !entry->perm;
++ error = 0;
++ break;
++ }
++ if (error && !is_delete) {
++ entry = ccs_commit_ok(new_entry, size);
++ if (entry) {
++ list_add_tail_rcu(&entry->list, list);
++ error = 0;
++ }
++ }
++ mutex_unlock(&ccs_policy_lock);
++ return error;
++}
++
++/**
++ * ccs_permstr - Find permission keywords.
++ *
++ * @string: String representation for permissions in foo/bar/buz format.
++ * @keyword: Keyword to find from @string/
++ *
++ * Returns ture if @keyword was found in @string, false otherwise.
++ *
++ * This function assumes that strncmp(w1, w2, strlen(w1)) != 0 if w1 != w2.
++ */
++static bool ccs_permstr(const char *string, const char *keyword)
++{
++ const char *cp = strstr(string, keyword);
++ if (cp)
++ return cp == string || *(cp - 1) == '/';
++ return false;
++}
++
++/**
++ * ccs_write_task - Update task related list.
++ *
++ * @param: Pointer to "struct ccs_acl_param".
++ *
++ * Returns 0 on success, negative value otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static int ccs_write_task(struct ccs_acl_param *param)
++{
++ int error;
++ const bool is_auto = ccs_str_starts(¶m->data,
++ "auto_domain_transition ");
++ if (!is_auto && !ccs_str_starts(¶m->data,
++ "manual_domain_transition ")) {
++#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
++ struct ccs_handler_acl *e = ¶m->e.handler_acl;
++ char *handler;
++ if (ccs_str_starts(¶m->data, "auto_execute_handler "))
++ e->head.type = CCS_TYPE_AUTO_EXECUTE_HANDLER;
++ else if (ccs_str_starts(¶m->data,
++ "denied_execute_handler "))
++ e->head.type = CCS_TYPE_DENIED_EXECUTE_HANDLER;
++ else
++ return -EINVAL;
++ handler = ccs_read_token(param);
++ if (!ccs_correct_path(handler))
++ return -EINVAL;
++ e->handler = ccs_get_name(handler);
++ if (!e->handler)
++ return -ENOMEM;
++ if (e->handler->is_patterned)
++ return -EINVAL; /* No patterns allowed. */
++ return ccs_update_acl(sizeof(*e), param);
++#else
++ error = -EINVAL;
++#endif
++ } else {
++#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
++ struct ccs_task_acl *e = ¶m->e.task_acl;
++ e->head.type = is_auto ?
++ CCS_TYPE_AUTO_TASK_ACL : CCS_TYPE_MANUAL_TASK_ACL;
++ e->domainname = ccs_get_domainname(param);
++ if (!e->domainname)
++ return -EINVAL;
++ return ccs_update_acl(sizeof(*e), param);
++#else
++ error = -EINVAL;
++#endif
++ }
++ return error;
++}
++
++#ifdef CONFIG_CCSECURITY_NETWORK
++
++/**
++ * ccs_write_inet_network - Write "struct ccs_inet_acl" list.
++ *
++ * @param: Pointer to "struct ccs_acl_param".
++ *
++ * Returns 0 on success, negative value otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static int ccs_write_inet_network(struct ccs_acl_param *param)
++{
++ struct ccs_inet_acl *e = ¶m->e.inet_acl;
++ u8 type;
++ const char *protocol = ccs_read_token(param);
++ const char *operation = ccs_read_token(param);
++ e->head.type = CCS_TYPE_INET_ACL;
++ for (type = 0; type < CCS_SOCK_MAX; type++)
++ if (!strcmp(protocol, ccs_proto_keyword[type]))
++ break;
++ if (type == CCS_SOCK_MAX)
++ return -EINVAL;
++ e->protocol = type;
++ e->head.perm = 0;
++ for (type = 0; type < CCS_MAX_NETWORK_OPERATION; type++)
++ if (ccs_permstr(operation, ccs_socket_keyword[type]))
++ e->head.perm |= 1 << type;
++ if (!e->head.perm)
++ return -EINVAL;
++ if (param->data[0] == '@') {
++ param->data++;
++ e->address.group = ccs_get_group(param, CCS_ADDRESS_GROUP);
++ if (!e->address.group)
++ return -ENOMEM;
++ } else {
++ if (!ccs_parse_ipaddr_union(param, &e->address))
++ return -EINVAL;
++ }
++ if (!ccs_parse_number_union(param, &e->port) ||
++ e->port.values[1] > 65535)
++ return -EINVAL;
++ return ccs_update_acl(sizeof(*e), param);
++}
++
++/**
++ * ccs_write_unix_network - Write "struct ccs_unix_acl" list.
++ *
++ * @param: Pointer to "struct ccs_acl_param".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_write_unix_network(struct ccs_acl_param *param)
++{
++ struct ccs_unix_acl *e = ¶m->e.unix_acl;
++ u8 type;
++ const char *protocol = ccs_read_token(param);
++ const char *operation = ccs_read_token(param);
++ e->head.type = CCS_TYPE_UNIX_ACL;
++ for (type = 0; type < CCS_SOCK_MAX; type++)
++ if (!strcmp(protocol, ccs_proto_keyword[type]))
++ break;
++ if (type == CCS_SOCK_MAX)
++ return -EINVAL;
++ e->protocol = type;
++ e->head.perm = 0;
++ for (type = 0; type < CCS_MAX_NETWORK_OPERATION; type++)
++ if (ccs_permstr(operation, ccs_socket_keyword[type]))
++ e->head.perm |= 1 << type;
++ if (!e->head.perm)
++ return -EINVAL;
++ if (!ccs_parse_name_union(param, &e->name))
++ return -EINVAL;
++ return ccs_update_acl(sizeof(*e), param);
++}
++
++#endif
++
++/**
++ * ccs_write_file - Update file related list.
++ *
++ * @param: Pointer to "struct ccs_acl_param".
++ *
++ * Returns 0 on success, negative value otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static int ccs_write_file(struct ccs_acl_param *param)
++{
++ u16 perm = 0;
++ u8 type;
++ const char *operation = ccs_read_token(param);
++ for (type = 0; type < CCS_MAX_PATH_OPERATION; type++)
++ if (ccs_permstr(operation, ccs_path_keyword[type]))
++ perm |= 1 << type;
++ if (perm) {
++ struct ccs_path_acl *e = ¶m->e.path_acl;
++ e->head.type = CCS_TYPE_PATH_ACL;
++ e->head.perm = perm;
++ if (!ccs_parse_name_union(param, &e->name))
++ return -EINVAL;
++ return ccs_update_acl(sizeof(*e), param);
++ }
++ for (type = 0; type < CCS_MAX_PATH2_OPERATION; type++)
++ if (ccs_permstr(operation, ccs_mac_keywords[ccs_pp2mac[type]]))
++ perm |= 1 << type;
++ if (perm) {
++ struct ccs_path2_acl *e = ¶m->e.path2_acl;
++ e->head.type = CCS_TYPE_PATH2_ACL;
++ e->head.perm = perm;
++ if (!ccs_parse_name_union(param, &e->name1) ||
++ !ccs_parse_name_union(param, &e->name2))
++ return -EINVAL;
++ return ccs_update_acl(sizeof(*e), param);
++ }
++ for (type = 0; type < CCS_MAX_PATH_NUMBER_OPERATION; type++)
++ if (ccs_permstr(operation, ccs_mac_keywords[ccs_pn2mac[type]]))
++ perm |= 1 << type;
++ if (perm) {
++ struct ccs_path_number_acl *e = ¶m->e.path_number_acl;
++ e->head.type = CCS_TYPE_PATH_NUMBER_ACL;
++ e->head.perm = perm;
++ if (!ccs_parse_name_union(param, &e->name) ||
++ !ccs_parse_number_union(param, &e->number))
++ return -EINVAL;
++ return ccs_update_acl(sizeof(*e), param);
++ }
++ for (type = 0; type < CCS_MAX_MKDEV_OPERATION; type++)
++ if (ccs_permstr(operation,
++ ccs_mac_keywords[ccs_pnnn2mac[type]]))
++ perm |= 1 << type;
++ if (perm) {
++ struct ccs_mkdev_acl *e = ¶m->e.mkdev_acl;
++ e->head.type = CCS_TYPE_MKDEV_ACL;
++ e->head.perm = perm;
++ if (!ccs_parse_name_union(param, &e->name) ||
++ !ccs_parse_number_union(param, &e->mode) ||
++ !ccs_parse_number_union(param, &e->major) ||
++ !ccs_parse_number_union(param, &e->minor))
++ return -EINVAL;
++ return ccs_update_acl(sizeof(*e), param);
++ }
++ if (ccs_permstr(operation, ccs_mac_keywords[CCS_MAC_FILE_MOUNT])) {
++ struct ccs_mount_acl *e = ¶m->e.mount_acl;
++ e->head.type = CCS_TYPE_MOUNT_ACL;
++ if (!ccs_parse_name_union(param, &e->dev_name) ||
++ !ccs_parse_name_union(param, &e->dir_name) ||
++ !ccs_parse_name_union(param, &e->fs_type) ||
++ !ccs_parse_number_union(param, &e->flags))
++ return -EINVAL;
++ return ccs_update_acl(sizeof(*e), param);
++ }
++ return -EINVAL;
++}
++
++#ifdef CONFIG_CCSECURITY_MISC
++
++/**
++ * ccs_write_misc - Update environment variable list.
++ *
++ * @param: Pointer to "struct ccs_acl_param".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_write_misc(struct ccs_acl_param *param)
++{
++ if (ccs_str_starts(¶m->data, "env ")) {
++ struct ccs_env_acl *e = ¶m->e.env_acl;
++ const char *data = ccs_read_token(param);
++ e->head.type = CCS_TYPE_ENV_ACL;
++ if (!ccs_correct_word(data) || strchr(data, '='))
++ return -EINVAL;
++ e->env = ccs_get_name(data);
++ if (!e->env)
++ return -ENOMEM;
++ return ccs_update_acl(sizeof(*e), param);
++ }
++ return -EINVAL;
++}
++
++#endif
++
++#ifdef CONFIG_CCSECURITY_IPC
++
++/**
++ * ccs_write_ipc - Update "struct ccs_signal_acl" list.
++ *
++ * @param: Pointer to "struct ccs_acl_param".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_write_ipc(struct ccs_acl_param *param)
++{
++ struct ccs_signal_acl *e = ¶m->e.signal_acl;
++ e->head.type = CCS_TYPE_SIGNAL_ACL;
++ if (!ccs_parse_number_union(param, &e->sig))
++ return -EINVAL;
++ e->domainname = ccs_get_domainname(param);
++ if (!e->domainname)
++ return -EINVAL;
++ return ccs_update_acl(sizeof(*e), param);
++}
++
++#endif
++
++#ifdef CONFIG_CCSECURITY_CAPABILITY
++
++/**
++ * ccs_write_capability - Write "struct ccs_capability_acl" list.
++ *
++ * @param: Pointer to "struct ccs_acl_param".
++ *
++ * Returns 0 on success, negative value otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static int ccs_write_capability(struct ccs_acl_param *param)
++{
++ struct ccs_capability_acl *e = ¶m->e.capability_acl;
++ const char *operation = ccs_read_token(param);
++ u8 type;
++ e->head.type = CCS_TYPE_CAPABILITY_ACL;
++ for (type = 0; type < CCS_MAX_CAPABILITY_INDEX; type++) {
++ if (strcmp(operation, ccs_mac_keywords[ccs_c2mac[type]]))
++ continue;
++ e->operation = type;
++ return ccs_update_acl(sizeof(*e), param);
++ }
++ return -EINVAL;
++}
++
++#endif
++
++/**
++ * ccs_write_acl - Write "struct ccs_acl_info" list.
++ *
++ * @ns: Pointer to "struct ccs_policy_namespace".
++ * @list: Pointer to "struct list_head".
++ * @data: Policy to be interpreted.
++ * @is_delete: True if it is a delete request.
++ *
++ * Returns 0 on success, negative value otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static int ccs_write_acl(struct ccs_policy_namespace *ns,
++ struct list_head *list, char *data,
++ const bool is_delete)
++{
++ struct ccs_acl_param param = {
++ .ns = ns,
++ .list = list,
++ .data = data,
++ .is_delete = is_delete,
++ };
++ static const struct {
++ const char *keyword;
++ int (*write) (struct ccs_acl_param *);
++ } ccs_callback[] = {
++ { "file ", ccs_write_file },
++#ifdef CONFIG_CCSECURITY_NETWORK
++ { "network inet ", ccs_write_inet_network },
++ { "network unix ", ccs_write_unix_network },
++#endif
++#ifdef CONFIG_CCSECURITY_MISC
++ { "misc ", ccs_write_misc },
++#endif
++#ifdef CONFIG_CCSECURITY_CAPABILITY
++ { "capability ", ccs_write_capability },
++#endif
++#ifdef CONFIG_CCSECURITY_IPC
++ { "ipc signal ", ccs_write_ipc },
++#endif
++ { "task ", ccs_write_task },
++ };
++ u8 i;
++ /* Forced zero clear for using memcmp() at ccs_update_acl(). */
++ memset(¶m.e, 0, sizeof(param.e));
++ param.e.acl_info.perm = 1;
++ for (i = 0; i < ARRAY_SIZE(ccs_callback); i++) {
++ int error;
++ if (!ccs_str_starts(¶m.data, ccs_callback[i].keyword))
++ continue;
++ error = ccs_callback[i].write(¶m);
++ ccs_del_acl(¶m.e.acl_info.list);
++ return error;
++ }
++ return -EINVAL;
++}
++
++/**
++ * ccs_delete_domain - Delete a domain.
++ *
++ * @domainname: The name of domain.
++ *
++ * Returns 0.
++ */
++static int ccs_delete_domain(char *domainname)
++{
++ struct ccs_domain_info *domain;
++ struct ccs_path_info name;
++ name.name = domainname;
++ ccs_fill_path_info(&name);
++ if (mutex_lock_interruptible(&ccs_policy_lock))
++ return 0;
++ /* Is there an active domain? */
++ list_for_each_entry_srcu(domain, &ccs_domain_list, list, &ccs_ss) {
++ /* Never delete ccs_kernel_domain. */
++ if (domain == &ccs_kernel_domain)
++ continue;
++ if (domain->is_deleted ||
++ ccs_pathcmp(domain->domainname, &name))
++ continue;
++ domain->is_deleted = true;
++ break;
++ }
++ mutex_unlock(&ccs_policy_lock);
++ return 0;
++}
++
++/**
++ * ccs_write_domain - Write domain policy.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ *
++ * Returns 0 on success, negative value otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static int ccs_write_domain(struct ccs_io_buffer *head)
++{
++ char *data = head->write_buf;
++ struct ccs_policy_namespace *ns;
++ struct ccs_domain_info *domain = head->w.domain;
++ const bool is_delete = head->w.is_delete;
++ const bool is_select = !is_delete && ccs_str_starts(&data, "select ");
++ unsigned int idx;
++ if (*data == '<') {
++ domain = NULL;
++ if (is_delete)
++ ccs_delete_domain(data);
++ else if (is_select)
++ domain = ccs_find_domain(data);
++ else
++ domain = ccs_assign_domain(data, false);
++ head->w.domain = domain;
++ return 0;
++ }
++ if (!domain)
++ return -EINVAL;
++ ns = domain->ns;
++ if (sscanf(data, "use_profile %u\n", &idx) == 1 &&
++ idx < CCS_MAX_PROFILES) {
++ if (!ccs_policy_loaded || ns->profile_ptr[(u8) idx])
++ if (!is_delete)
++ domain->profile = (u8) idx;
++ return 0;
++ }
++ if (sscanf(data, "use_group %u\n", &idx) == 1 &&
++ idx < CCS_MAX_ACL_GROUPS) {
++ if (!is_delete)
++ set_bit(idx, domain->group);
++ else
++ clear_bit(idx, domain->group);
++ return 0;
++ }
++ for (idx = 0; idx < CCS_MAX_DOMAIN_INFO_FLAGS; idx++) {
++ const char *cp = ccs_dif[idx];
++ if (strncmp(data, cp, strlen(cp) - 1))
++ continue;
++ domain->flags[idx] = !is_delete;
++ return 0;
++ }
++ return ccs_write_acl(ns, &domain->acl_info_list, data, is_delete);
++}
++
++/**
++ * ccs_print_name_union - Print a ccs_name_union.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ * @ptr: Pointer to "struct ccs_name_union".
++ *
++ * Returns nothing.
++ */
++static void ccs_print_name_union(struct ccs_io_buffer *head,
++ const struct ccs_name_union *ptr)
++{
++ ccs_set_space(head);
++ if (!ccs_print_group(head, ptr->group))
++ ccs_set_string(head, ptr->filename->name);
++}
++
++/**
++ * ccs_print_name_union_quoted - Print a ccs_name_union with a quote.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ * @ptr: Pointer to "struct ccs_name_union".
++ *
++ * Returns nothing.
++ */
++static void ccs_print_name_union_quoted(struct ccs_io_buffer *head,
++ const struct ccs_name_union *ptr)
++{
++ if (!ccs_print_group(head, ptr->group)) {
++ ccs_set_string(head, "\"");
++ ccs_set_string(head, ptr->filename->name);
++ ccs_set_string(head, "\"");
++ }
++}
++
++/**
++ * ccs_print_number_union_nospace - Print a ccs_number_union without a space.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ * @ptr: Pointer to "struct ccs_number_union".
++ *
++ * Returns nothing.
++ */
++static void ccs_print_number_union_nospace(struct ccs_io_buffer *head,
++ const struct ccs_number_union *ptr)
++{
++ if (!ccs_print_group(head, ptr->group)) {
++ int i;
++ unsigned long min = ptr->values[0];
++ const unsigned long max = ptr->values[1];
++ u8 min_type = ptr->value_type[0];
++ const u8 max_type = ptr->value_type[1];
++ char buffer[128];
++ buffer[0] = '\0';
++ for (i = 0; i < 2; i++) {
++ switch (min_type) {
++ case CCS_VALUE_TYPE_HEXADECIMAL:
++ ccs_addprintf(buffer, sizeof(buffer), "0x%lX",
++ min);
++ break;
++ case CCS_VALUE_TYPE_OCTAL:
++ ccs_addprintf(buffer, sizeof(buffer), "0%lo",
++ min);
++ break;
++ default:
++ ccs_addprintf(buffer, sizeof(buffer), "%lu",
++ min);
++ break;
++ }
++ if (min == max && min_type == max_type)
++ break;
++ ccs_addprintf(buffer, sizeof(buffer), "-");
++ min_type = max_type;
++ min = max;
++ }
++ ccs_io_printf(head, "%s", buffer);
++ }
++}
++
++/**
++ * ccs_print_number_union - Print a ccs_number_union.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ * @ptr: Pointer to "struct ccs_number_union".
++ *
++ * Returns nothing.
++ */
++static void ccs_print_number_union(struct ccs_io_buffer *head,
++ const struct ccs_number_union *ptr)
++{
++ ccs_set_space(head);
++ ccs_print_number_union_nospace(head, ptr);
++}
++
++/**
++ * ccs_print_condition - Print condition part.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ * @cond: Pointer to "struct ccs_condition".
++ *
++ * Returns true on success, false otherwise.
++ */
++static bool ccs_print_condition(struct ccs_io_buffer *head,
++ const struct ccs_condition *cond)
++{
++ switch (head->r.cond_step) {
++ case 0:
++ head->r.cond_index = 0;
++ head->r.cond_step++;
++ if (cond->transit && cond->exec_transit) {
++ ccs_set_space(head);
++ ccs_set_string(head, cond->transit->name);
++ }
++ /* fall through */
++ case 1:
++ {
++ const u16 condc = cond->condc;
++ const struct ccs_condition_element *condp =
++ (typeof(condp)) (cond + 1);
++ const struct ccs_number_union *numbers_p =
++ (typeof(numbers_p)) (condp + condc);
++ const struct ccs_name_union *names_p =
++ (typeof(names_p))
++ (numbers_p + cond->numbers_count);
++ const struct ccs_argv *argv =
++ (typeof(argv)) (names_p + cond->names_count);
++ const struct ccs_envp *envp =
++ (typeof(envp)) (argv + cond->argc);
++ u16 skip;
++ for (skip = 0; skip < head->r.cond_index; skip++) {
++ const u8 left = condp->left;
++ const u8 right = condp->right;
++ condp++;
++ switch (left) {
++ case CCS_ARGV_ENTRY:
++ argv++;
++ continue;
++ case CCS_ENVP_ENTRY:
++ envp++;
++ continue;
++ case CCS_NUMBER_UNION:
++ numbers_p++;
++ break;
++ }
++ switch (right) {
++ case CCS_NAME_UNION:
++ names_p++;
++ break;
++ case CCS_NUMBER_UNION:
++ numbers_p++;
++ break;
++ }
++ }
++ while (head->r.cond_index < condc) {
++ const u8 match = condp->equals;
++ const u8 left = condp->left;
++ const u8 right = condp->right;
++ if (!ccs_flush(head))
++ return false;
++ condp++;
++ head->r.cond_index++;
++ ccs_set_space(head);
++ switch (left) {
++ case CCS_ARGV_ENTRY:
++ ccs_io_printf(head,
++ "exec.argv[%lu]%s=\"",
++ argv->index,
++ argv->is_not ? "!" : "");
++ ccs_set_string(head,
++ argv->value->name);
++ ccs_set_string(head, "\"");
++ argv++;
++ continue;
++ case CCS_ENVP_ENTRY:
++ ccs_set_string(head, "exec.envp[\"");
++ ccs_set_string(head, envp->name->name);
++ ccs_io_printf(head, "\"]%s=",
++ envp->is_not ? "!" : "");
++ if (envp->value) {
++ ccs_set_string(head, "\"");
++ ccs_set_string(head, envp->
++ value->name);
++ ccs_set_string(head, "\"");
++ } else {
++ ccs_set_string(head, "NULL");
++ }
++ envp++;
++ continue;
++ case CCS_NUMBER_UNION:
++ ccs_print_number_union_nospace
++ (head, numbers_p++);
++ break;
++ default:
++ ccs_set_string(head,
++ ccs_condition_keyword[left]);
++ break;
++ }
++ ccs_set_string(head, match ? "=" : "!=");
++ switch (right) {
++ case CCS_NAME_UNION:
++ ccs_print_name_union_quoted
++ (head, names_p++);
++ break;
++ case CCS_NUMBER_UNION:
++ ccs_print_number_union_nospace
++ (head, numbers_p++);
++ break;
++ default:
++ ccs_set_string(head,
++ ccs_condition_keyword[right]);
++ break;
++ }
++ }
++ }
++ head->r.cond_step++;
++ /* fall through */
++ case 2:
++ if (!ccs_flush(head))
++ break;
++ head->r.cond_step++;
++ /* fall through */
++ case 3:
++ if (cond->grant_log != CCS_GRANTLOG_AUTO)
++ ccs_io_printf(head, " grant_log=%s",
++ ccs_yesno(cond->grant_log ==
++ CCS_GRANTLOG_YES));
++ if (cond->transit && !cond->exec_transit) {
++ const char *name = cond->transit->name;
++ ccs_set_string(head, " auto_domain_transition=\"");
++ ccs_set_string(head, name);
++ ccs_set_string(head, "\"");
++ }
++ ccs_set_lf(head);
++ return true;
++ }
++ return false;
++}
++
++/**
++ * ccs_set_group - Print "acl_group " header keyword and category name.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ * @category: Category name.
++ *
++ * Returns nothing.
++ */
++static void ccs_set_group(struct ccs_io_buffer *head, const char *category)
++{
++ if (head->type == CCS_EXCEPTION_POLICY) {
++ ccs_print_namespace(head);
++ ccs_io_printf(head, "acl_group %u ", head->r.acl_group_index);
++ }
++ ccs_set_string(head, category);
++}
++
++/**
++ * ccs_print_entry - Print an ACL entry.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ * @acl: Pointer to an ACL entry.
++ *
++ * Returns true on success, false otherwise.
++ */
++static bool ccs_print_entry(struct ccs_io_buffer *head,
++ const struct ccs_acl_info *acl)
++{
++ const u8 acl_type = acl->type;
++ const bool may_trigger_transition = acl->cond && acl->cond->transit;
++ bool first = true;
++ u8 bit;
++ if (head->r.print_cond_part)
++ goto print_cond_part;
++ if (acl->is_deleted)
++ return true;
++ if (!ccs_flush(head))
++ return false;
++ else if (acl_type == CCS_TYPE_PATH_ACL) {
++ struct ccs_path_acl *ptr
++ = container_of(acl, typeof(*ptr), head);
++ for (bit = 0; bit < CCS_MAX_PATH_OPERATION; bit++) {
++ if (!(acl->perm & (1 << bit)))
++ continue;
++ if (head->r.print_transition_related_only &&
++ bit != CCS_TYPE_EXECUTE && !may_trigger_transition)
++ continue;
++ if (first) {
++ ccs_set_group(head, "file ");
++ first = false;
++ } else {
++ ccs_set_slash(head);
++ }
++ ccs_set_string(head, ccs_path_keyword[bit]);
++ }
++ if (first)
++ return true;
++ ccs_print_name_union(head, &ptr->name);
++#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
++ } else if (acl_type == CCS_TYPE_AUTO_EXECUTE_HANDLER ||
++ acl_type == CCS_TYPE_DENIED_EXECUTE_HANDLER) {
++ struct ccs_handler_acl *ptr
++ = container_of(acl, typeof(*ptr), head);
++ ccs_set_group(head, "task ");
++ ccs_set_string(head, acl_type == CCS_TYPE_AUTO_EXECUTE_HANDLER
++ ? "auto_execute_handler " :
++ "denied_execute_handler ");
++ ccs_set_string(head, ptr->handler->name);
++#endif
++#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
++ } else if (acl_type == CCS_TYPE_AUTO_TASK_ACL ||
++ acl_type == CCS_TYPE_MANUAL_TASK_ACL) {
++ struct ccs_task_acl *ptr =
++ container_of(acl, typeof(*ptr), head);
++ ccs_set_group(head, "task ");
++ ccs_set_string(head, acl_type == CCS_TYPE_AUTO_TASK_ACL ?
++ "auto_domain_transition " :
++ "manual_domain_transition ");
++ ccs_set_string(head, ptr->domainname->name);
++#endif
++ } else if (head->r.print_transition_related_only &&
++ !may_trigger_transition) {
++ return true;
++ } else if (acl_type == CCS_TYPE_MKDEV_ACL) {
++ struct ccs_mkdev_acl *ptr =
++ container_of(acl, typeof(*ptr), head);
++ for (bit = 0; bit < CCS_MAX_MKDEV_OPERATION; bit++) {
++ if (!(acl->perm & (1 << bit)))
++ continue;
++ if (first) {
++ ccs_set_group(head, "file ");
++ first = false;
++ } else {
++ ccs_set_slash(head);
++ }
++ ccs_set_string(head, ccs_mac_keywords
++ [ccs_pnnn2mac[bit]]);
++ }
++ if (first)
++ return true;
++ ccs_print_name_union(head, &ptr->name);
++ ccs_print_number_union(head, &ptr->mode);
++ ccs_print_number_union(head, &ptr->major);
++ ccs_print_number_union(head, &ptr->minor);
++ } else if (acl_type == CCS_TYPE_PATH2_ACL) {
++ struct ccs_path2_acl *ptr =
++ container_of(acl, typeof(*ptr), head);
++ for (bit = 0; bit < CCS_MAX_PATH2_OPERATION; bit++) {
++ if (!(acl->perm & (1 << bit)))
++ continue;
++ if (first) {
++ ccs_set_group(head, "file ");
++ first = false;
++ } else {
++ ccs_set_slash(head);
++ }
++ ccs_set_string(head, ccs_mac_keywords
++ [ccs_pp2mac[bit]]);
++ }
++ if (first)
++ return true;
++ ccs_print_name_union(head, &ptr->name1);
++ ccs_print_name_union(head, &ptr->name2);
++ } else if (acl_type == CCS_TYPE_PATH_NUMBER_ACL) {
++ struct ccs_path_number_acl *ptr =
++ container_of(acl, typeof(*ptr), head);
++ for (bit = 0; bit < CCS_MAX_PATH_NUMBER_OPERATION; bit++) {
++ if (!(acl->perm & (1 << bit)))
++ continue;
++ if (first) {
++ ccs_set_group(head, "file ");
++ first = false;
++ } else {
++ ccs_set_slash(head);
++ }
++ ccs_set_string(head, ccs_mac_keywords
++ [ccs_pn2mac[bit]]);
++ }
++ if (first)
++ return true;
++ ccs_print_name_union(head, &ptr->name);
++ ccs_print_number_union(head, &ptr->number);
++#ifdef CONFIG_CCSECURITY_MISC
++ } else if (acl_type == CCS_TYPE_ENV_ACL) {
++ struct ccs_env_acl *ptr =
++ container_of(acl, typeof(*ptr), head);
++ ccs_set_group(head, "misc env ");
++ ccs_set_string(head, ptr->env->name);
++#endif
++#ifdef CONFIG_CCSECURITY_CAPABILITY
++ } else if (acl_type == CCS_TYPE_CAPABILITY_ACL) {
++ struct ccs_capability_acl *ptr =
++ container_of(acl, typeof(*ptr), head);
++ ccs_set_group(head, "capability ");
++ ccs_set_string(head, ccs_mac_keywords
++ [ccs_c2mac[ptr->operation]]);
++#endif
++#ifdef CONFIG_CCSECURITY_NETWORK
++ } else if (acl_type == CCS_TYPE_INET_ACL) {
++ struct ccs_inet_acl *ptr =
++ container_of(acl, typeof(*ptr), head);
++ for (bit = 0; bit < CCS_MAX_NETWORK_OPERATION; bit++) {
++ if (!(acl->perm & (1 << bit)))
++ continue;
++ if (first) {
++ ccs_set_group(head, "network inet ");
++ ccs_set_string(head, ccs_proto_keyword
++ [ptr->protocol]);
++ ccs_set_space(head);
++ first = false;
++ } else {
++ ccs_set_slash(head);
++ }
++ ccs_set_string(head, ccs_socket_keyword[bit]);
++ }
++ if (first)
++ return true;
++ ccs_set_space(head);
++ if (!ccs_print_group(head, ptr->address.group)) {
++ char buf[128];
++ ccs_print_ip(buf, sizeof(buf), &ptr->address);
++ ccs_io_printf(head, "%s", buf);
++ }
++ ccs_print_number_union(head, &ptr->port);
++ } else if (acl_type == CCS_TYPE_UNIX_ACL) {
++ struct ccs_unix_acl *ptr =
++ container_of(acl, typeof(*ptr), head);
++ for (bit = 0; bit < CCS_MAX_NETWORK_OPERATION; bit++) {
++ if (!(acl->perm & (1 << bit)))
++ continue;
++ if (first) {
++ ccs_set_group(head, "network unix ");
++ ccs_set_string(head, ccs_proto_keyword
++ [ptr->protocol]);
++ ccs_set_space(head);
++ first = false;
++ } else {
++ ccs_set_slash(head);
++ }
++ ccs_set_string(head, ccs_socket_keyword[bit]);
++ }
++ if (first)
++ return true;
++ ccs_print_name_union(head, &ptr->name);
++#endif
++#ifdef CONFIG_CCSECURITY_IPC
++ } else if (acl_type == CCS_TYPE_SIGNAL_ACL) {
++ struct ccs_signal_acl *ptr =
++ container_of(acl, typeof(*ptr), head);
++ ccs_set_group(head, "ipc signal ");
++ ccs_print_number_union_nospace(head, &ptr->sig);
++ ccs_set_space(head);
++ ccs_set_string(head, ptr->domainname->name);
++#endif
++ } else if (acl_type == CCS_TYPE_MOUNT_ACL) {
++ struct ccs_mount_acl *ptr =
++ container_of(acl, typeof(*ptr), head);
++ ccs_set_group(head, "file mount");
++ ccs_print_name_union(head, &ptr->dev_name);
++ ccs_print_name_union(head, &ptr->dir_name);
++ ccs_print_name_union(head, &ptr->fs_type);
++ ccs_print_number_union(head, &ptr->flags);
++ }
++ if (acl->cond) {
++ head->r.print_cond_part = true;
++ head->r.cond_step = 0;
++ if (!ccs_flush(head))
++ return false;
++print_cond_part:
++ if (!ccs_print_condition(head, acl->cond))
++ return false;
++ head->r.print_cond_part = false;
++ } else {
++ ccs_set_lf(head);
++ }
++ return true;
++}
++
++/**
++ * ccs_read_acl - Read "struct ccs_acl_info" list.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ * @list: Pointer to "struct list_head".
++ *
++ * Returns true on success, false otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static bool ccs_read_acl(struct ccs_io_buffer *head, struct list_head *list)
++{
++ list_for_each_cookie(head->r.acl, list) {
++ struct ccs_acl_info *ptr =
++ list_entry(head->r.acl, typeof(*ptr), list);
++ if (!ccs_print_entry(head, ptr))
++ return false;
++ }
++ head->r.acl = NULL;
++ return true;
++}
++
++/**
++ * ccs_read_domain - Read domain policy.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ *
++ * Returns nothing.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static void ccs_read_domain(struct ccs_io_buffer *head)
++{
++ if (head->r.eof)
++ return;
++ list_for_each_cookie(head->r.domain, &ccs_domain_list) {
++ struct ccs_domain_info *domain =
++ list_entry(head->r.domain, typeof(*domain), list);
++ switch (head->r.step) {
++ u8 i;
++ case 0:
++ if (domain->is_deleted &&
++ !head->r.print_this_domain_only)
++ continue;
++ /* Print domainname and flags. */
++ ccs_set_string(head, domain->domainname->name);
++ ccs_set_lf(head);
++ ccs_io_printf(head, "use_profile %u\n",
++ domain->profile);
++ for (i = 0; i < CCS_MAX_DOMAIN_INFO_FLAGS; i++)
++ if (domain->flags[i])
++ ccs_set_string(head, ccs_dif[i]);
++ head->r.index = 0;
++ head->r.step++;
++ /* fall through */
++ case 1:
++ while (head->r.index < CCS_MAX_ACL_GROUPS) {
++ i = head->r.index++;
++ if (!test_bit(i, domain->group))
++ continue;
++ ccs_io_printf(head, "use_group %u\n", i);
++ if (!ccs_flush(head))
++ return;
++ }
++ head->r.index = 0;
++ head->r.step++;
++ ccs_set_lf(head);
++ /* fall through */
++ case 2:
++ if (!ccs_read_acl(head, &domain->acl_info_list))
++ return;
++ head->r.step++;
++ if (!ccs_set_lf(head))
++ return;
++ /* fall through */
++ case 3:
++ head->r.step = 0;
++ if (head->r.print_this_domain_only)
++ goto done;
++ }
++ }
++done:
++ head->r.eof = true;
++}
++
++/**
++ * ccs_write_pid - Specify PID to obtain domainname.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ *
++ * Returns 0.
++ */
++static int ccs_write_pid(struct ccs_io_buffer *head)
++{
++ head->r.eof = false;
++ return 0;
++}
++
++/**
++ * ccs_read_pid - Read information of a process.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ *
++ * Returns the domainname which the specified PID is in or
++ * process information of the specified PID on success,
++ * empty string otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static void ccs_read_pid(struct ccs_io_buffer *head)
++{
++ char *buf = head->write_buf;
++ bool task_info = false;
++ bool global_pid = false;
++ unsigned int pid;
++ struct task_struct *p;
++ struct ccs_domain_info *domain = NULL;
++ u32 ccs_flags = 0;
++ /* Accessing write_buf is safe because head->io_sem is held. */
++ if (!buf) {
++ head->r.eof = true;
++ return; /* Do nothing if open(O_RDONLY). */
++ }
++ if (head->r.w_pos || head->r.eof)
++ return;
++ head->r.eof = true;
++ if (ccs_str_starts(&buf, "info "))
++ task_info = true;
++ if (ccs_str_starts(&buf, "global-pid "))
++ global_pid = true;
++ pid = (unsigned int) simple_strtoul(buf, NULL, 10);
++ ccs_tasklist_lock();
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24)
++ if (global_pid)
++ p = ccsecurity_exports.find_task_by_pid_ns(pid, &init_pid_ns);
++ else
++ p = ccsecurity_exports.find_task_by_vpid(pid);
++#else
++ p = find_task_by_pid(pid);
++#endif
++ if (p) {
++ domain = ccs_task_domain(p);
++ ccs_flags = ccs_task_flags(p);
++ }
++ ccs_tasklist_unlock();
++ if (!domain)
++ return;
++ if (!task_info) {
++ ccs_io_printf(head, "%u %u ", pid, domain->profile);
++ ccs_set_string(head, domain->domainname->name);
++ } else {
++ ccs_io_printf(head, "%u manager=%s execute_handler=%s ", pid,
++ ccs_yesno(ccs_flags &
++ CCS_TASK_IS_MANAGER),
++ ccs_yesno(ccs_flags &
++ CCS_TASK_IS_EXECUTE_HANDLER));
++ }
++}
++
++/**
++ * ccs_write_group - Write "struct ccs_path_group"/"struct ccs_number_group"/"struct ccs_address_group" list.
++ *
++ * @param: Pointer to "struct ccs_acl_param".
++ * @type: Type of this group.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_write_group(struct ccs_acl_param *param, const u8 type)
++{
++ struct ccs_group *group = ccs_get_group(param, type);
++ int error = -EINVAL;
++ if (!group)
++ return -ENOMEM;
++ param->list = &group->member_list;
++ if (type == CCS_PATH_GROUP) {
++ struct ccs_path_group *e = ¶m->e.path_group;
++ e->member_name = ccs_get_name(ccs_read_token(param));
++ if (!e->member_name) {
++ error = -ENOMEM;
++ goto out;
++ }
++ error = ccs_update_policy(sizeof(*e), param);
++ ccs_put_name(e->member_name);
++ } else if (type == CCS_NUMBER_GROUP) {
++ struct ccs_number_group *e = ¶m->e.number_group;
++ if (param->data[0] == '@' ||
++ !ccs_parse_number_union(param, &e->number))
++ goto out;
++ error = ccs_update_policy(sizeof(*e), param);
++#ifdef CONFIG_CCSECURITY_NETWORK
++ } else {
++ struct ccs_address_group *e = ¶m->e.address_group;
++ if (param->data[0] == '@' ||
++ !ccs_parse_ipaddr_union(param, &e->address))
++ goto out;
++ error = ccs_update_policy(sizeof(*e), param);
++#endif
++ }
++out:
++ ccs_put_group(group);
++ return error;
++}
++
++#ifdef CONFIG_CCSECURITY_PORTRESERVE
++/**
++ * ccs_lport_reserved - Check whether local port is reserved or not.
++ *
++ * @port: Port number.
++ *
++ * Returns true if local port is reserved, false otherwise.
++ */
++static bool __ccs_lport_reserved(const u16 port)
++{
++ return ccs_reserved_port_map[port >> 3] & (1 << (port & 7))
++ ? true : false;
++}
++
++/**
++ * ccs_write_reserved_port - Update "struct ccs_reserved" list.
++ *
++ * @param: Pointer to "struct ccs_acl_param".
++ *
++ * Returns 0 on success, negative value otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static int ccs_write_reserved_port(struct ccs_acl_param *param)
++{
++ struct ccs_reserved *e = ¶m->e.reserved;
++ struct ccs_policy_namespace *ns = param->ns;
++ int error;
++ u8 *tmp;
++ if (param->data[0] == '@' ||
++ !ccs_parse_number_union(param, &e->port) ||
++ e->port.values[1] > 65535 || param->data[0])
++ return -EINVAL;
++ param->list = &ns->policy_list[CCS_ID_RESERVEDPORT];
++ error = ccs_update_policy(sizeof(*e), param);
++ if (error)
++ return error;
++ tmp = kzalloc(sizeof(ccs_reserved_port_map), CCS_GFP_FLAGS);
++ if (!tmp)
++ return -ENOMEM;
++ list_for_each_entry_srcu(ns, &ccs_namespace_list, namespace_list,
++ &ccs_ss) {
++ struct ccs_reserved *ptr;
++ struct list_head *list = &ns->policy_list[CCS_ID_RESERVEDPORT];
++ list_for_each_entry_srcu(ptr, list, head.list, &ccs_ss) {
++ unsigned int port;
++ if (ptr->head.is_deleted)
++ continue;
++ for (port = ptr->port.values[0];
++ port <= ptr->port.values[1]; port++)
++ tmp[port >> 3] |= 1 << (port & 7);
++ }
++ }
++ memmove(ccs_reserved_port_map, tmp, sizeof(ccs_reserved_port_map));
++ kfree(tmp);
++ /*
++ * Since this feature is no-op by default, we don't need to register
++ * this callback hook unless the first entry is added.
++ */
++ ccsecurity_ops.lport_reserved = __ccs_lport_reserved;
++ return 0;
++}
++#endif
++
++/**
++ * ccs_write_aggregator - Write "struct ccs_aggregator" list.
++ *
++ * @param: Pointer to "struct ccs_acl_param".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_write_aggregator(struct ccs_acl_param *param)
++{
++ struct ccs_aggregator *e = ¶m->e.aggregator;
++ int error = param->is_delete ? -ENOENT : -ENOMEM;
++ const char *original_name = ccs_read_token(param);
++ const char *aggregated_name = ccs_read_token(param);
++ if (!ccs_correct_word(original_name) ||
++ !ccs_correct_path(aggregated_name))
++ return -EINVAL;
++ e->original_name = ccs_get_name(original_name);
++ e->aggregated_name = ccs_get_name(aggregated_name);
++ if (!e->original_name || !e->aggregated_name ||
++ e->aggregated_name->is_patterned) /* No patterns allowed. */
++ goto out;
++ param->list = ¶m->ns->policy_list[CCS_ID_AGGREGATOR];
++ error = ccs_update_policy(sizeof(*e), param);
++out:
++ ccs_put_name(e->original_name);
++ ccs_put_name(e->aggregated_name);
++ return error;
++}
++
++/**
++ * ccs_write_transition_control - Write "struct ccs_transition_control" list.
++ *
++ * @param: Pointer to "struct ccs_acl_param".
++ * @type: Type of this entry.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_write_transition_control(struct ccs_acl_param *param,
++ const u8 type)
++{
++ struct ccs_transition_control *e = ¶m->e.transition_control;
++ int error = param->is_delete ? -ENOENT : -ENOMEM;
++ char *program = param->data;
++ char *domainname = strstr(program, " from ");
++ e->type = type;
++ if (domainname) {
++ *domainname = '\0';
++ domainname += 6;
++ } else if (type == CCS_TRANSITION_CONTROL_NO_KEEP ||
++ type == CCS_TRANSITION_CONTROL_KEEP) {
++ domainname = program;
++ program = NULL;
++ }
++ if (program && strcmp(program, "any")) {
++ if (!ccs_correct_path(program))
++ return -EINVAL;
++ e->program = ccs_get_name(program);
++ if (!e->program)
++ goto out;
++ }
++ if (domainname && strcmp(domainname, "any")) {
++ if (!ccs_correct_domain(domainname)) {
++ if (!ccs_correct_path(domainname))
++ goto out;
++ e->is_last_name = true;
++ }
++ e->domainname = ccs_get_name(domainname);
++ if (!e->domainname)
++ goto out;
++ }
++ param->list = ¶m->ns->policy_list[CCS_ID_TRANSITION_CONTROL];
++ error = ccs_update_policy(sizeof(*e), param);
++out:
++ ccs_put_name(e->domainname);
++ ccs_put_name(e->program);
++ return error;
++}
++
++/**
++ * ccs_write_exception - Write exception policy.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_write_exception(struct ccs_io_buffer *head)
++{
++ const bool is_delete = head->w.is_delete;
++ struct ccs_acl_param param = {
++ .ns = head->w.ns,
++ .is_delete = is_delete,
++ .data = head->write_buf,
++ };
++ u8 i;
++ /* Forced zero clear for using memcmp() at ccs_update_policy(). */
++ memset(¶m.e, 0, sizeof(param.e));
++ if (ccs_str_starts(¶m.data, "aggregator "))
++ return ccs_write_aggregator(¶m);
++#ifdef CONFIG_CCSECURITY_PORTRESERVE
++ if (ccs_str_starts(¶m.data, "deny_autobind "))
++ return ccs_write_reserved_port(¶m);
++#endif
++ for (i = 0; i < CCS_MAX_TRANSITION_TYPE; i++)
++ if (ccs_str_starts(¶m.data, ccs_transition_type[i]))
++ return ccs_write_transition_control(¶m, i);
++ for (i = 0; i < CCS_MAX_GROUP; i++)
++ if (ccs_str_starts(¶m.data, ccs_group_name[i]))
++ return ccs_write_group(¶m, i);
++ if (ccs_str_starts(¶m.data, "acl_group ")) {
++ unsigned int group;
++ char *data;
++ group = simple_strtoul(param.data, &data, 10);
++ if (group < CCS_MAX_ACL_GROUPS && *data++ == ' ')
++ return ccs_write_acl(head->w.ns,
++ &head->w.ns->acl_group[group],
++ data, is_delete);
++ }
++ return -EINVAL;
++}
++
++/**
++ * ccs_read_group - Read "struct ccs_path_group"/"struct ccs_number_group"/"struct ccs_address_group" list.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ * @idx: Index number.
++ *
++ * Returns true on success, false otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static bool ccs_read_group(struct ccs_io_buffer *head, const int idx)
++{
++ struct ccs_policy_namespace *ns = container_of(head->r.ns, typeof(*ns),
++ namespace_list);
++ struct list_head *list = &ns->group_list[idx];
++ list_for_each_cookie(head->r.group, list) {
++ struct ccs_group *group =
++ list_entry(head->r.group, typeof(*group), head.list);
++ list_for_each_cookie(head->r.acl, &group->member_list) {
++ struct ccs_acl_head *ptr =
++ list_entry(head->r.acl, typeof(*ptr), list);
++ if (ptr->is_deleted)
++ continue;
++ if (!ccs_flush(head))
++ return false;
++ ccs_print_namespace(head);
++ ccs_set_string(head, ccs_group_name[idx]);
++ ccs_set_string(head, group->group_name->name);
++ if (idx == CCS_PATH_GROUP) {
++ ccs_set_space(head);
++ ccs_set_string(head, container_of
++ (ptr, struct ccs_path_group,
++ head)->member_name->name);
++ } else if (idx == CCS_NUMBER_GROUP) {
++ ccs_print_number_union(head, &container_of
++ (ptr, struct ccs_number_group,
++ head)->number);
++#ifdef CONFIG_CCSECURITY_NETWORK
++ } else if (idx == CCS_ADDRESS_GROUP) {
++ char buffer[128];
++ struct ccs_address_group *member =
++ container_of(ptr, typeof(*member),
++ head);
++ ccs_print_ip(buffer, sizeof(buffer),
++ &member->address);
++ ccs_io_printf(head, " %s", buffer);
++#endif
++ }
++ ccs_set_lf(head);
++ }
++ head->r.acl = NULL;
++ }
++ head->r.group = NULL;
++ return true;
++}
++
++/**
++ * ccs_read_policy - Read "struct ccs_..._entry" list.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ * @idx: Index number.
++ *
++ * Returns true on success, false otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static bool ccs_read_policy(struct ccs_io_buffer *head, const int idx)
++{
++ struct ccs_policy_namespace *ns = container_of(head->r.ns, typeof(*ns),
++ namespace_list);
++ struct list_head *list = &ns->policy_list[idx];
++ list_for_each_cookie(head->r.acl, list) {
++ struct ccs_acl_head *acl =
++ container_of(head->r.acl, typeof(*acl), list);
++ if (acl->is_deleted)
++ continue;
++ if (head->r.print_transition_related_only &&
++ idx != CCS_ID_TRANSITION_CONTROL)
++ continue;
++ if (!ccs_flush(head))
++ return false;
++ switch (idx) {
++ case CCS_ID_TRANSITION_CONTROL:
++ {
++ struct ccs_transition_control *ptr =
++ container_of(acl, typeof(*ptr), head);
++ ccs_print_namespace(head);
++ ccs_set_string(head,
++ ccs_transition_type[ptr->type]);
++ ccs_set_string(head, ptr->program ?
++ ptr->program->name : "any");
++ ccs_set_string(head, " from ");
++ ccs_set_string(head, ptr->domainname ?
++ ptr->domainname->name : "any");
++ }
++ break;
++ case CCS_ID_AGGREGATOR:
++ {
++ struct ccs_aggregator *ptr =
++ container_of(acl, typeof(*ptr), head);
++ ccs_print_namespace(head);
++ ccs_set_string(head, "aggregator ");
++ ccs_set_string(head, ptr->original_name->name);
++ ccs_set_space(head);
++ ccs_set_string(head,
++ ptr->aggregated_name->name);
++ }
++ break;
++#ifdef CONFIG_CCSECURITY_PORTRESERVE
++ case CCS_ID_RESERVEDPORT:
++ {
++ struct ccs_reserved *ptr =
++ container_of(acl, typeof(*ptr), head);
++ ccs_print_namespace(head);
++ ccs_set_string(head, "deny_autobind ");
++ ccs_print_number_union_nospace(head,
++ &ptr->port);
++ }
++ break;
++#endif
++ default:
++ continue;
++ }
++ ccs_set_lf(head);
++ }
++ head->r.acl = NULL;
++ return true;
++}
++
++/**
++ * ccs_read_exception - Read exception policy.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ *
++ * Returns nothing.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static void ccs_read_exception(struct ccs_io_buffer *head)
++{
++ struct ccs_policy_namespace *ns = container_of(head->r.ns, typeof(*ns),
++ namespace_list);
++ if (head->r.eof)
++ return;
++ while (head->r.step < CCS_MAX_POLICY &&
++ ccs_read_policy(head, head->r.step))
++ head->r.step++;
++ if (head->r.step < CCS_MAX_POLICY)
++ return;
++ while (head->r.step < CCS_MAX_POLICY + CCS_MAX_GROUP &&
++ ccs_read_group(head, head->r.step - CCS_MAX_POLICY))
++ head->r.step++;
++ if (head->r.step < CCS_MAX_POLICY + CCS_MAX_GROUP)
++ return;
++ while (head->r.step < CCS_MAX_POLICY + CCS_MAX_GROUP
++ + CCS_MAX_ACL_GROUPS) {
++ head->r.acl_group_index =
++ head->r.step - CCS_MAX_POLICY - CCS_MAX_GROUP;
++ if (!ccs_read_acl(head, &ns->acl_group
++ [head->r.acl_group_index]))
++ return;
++ head->r.step++;
++ }
++ head->r.eof = true;
++}
++
++/**
++ * ccs_truncate - Truncate a line.
++ *
++ * @str: String to truncate.
++ *
++ * Returns length of truncated @str.
++ */
++static int ccs_truncate(char *str)
++{
++ char *start = str;
++ while (*(unsigned char *) str > (unsigned char) ' ')
++ str++;
++ *str = '\0';
++ return strlen(start) + 1;
++}
++
++/**
++ * ccs_add_entry - Add an ACL to current thread's domain. Used by learning mode.
++ *
++ * @header: Lines containing ACL.
++ *
++ * Returns nothing.
++ */
++static void ccs_add_entry(char *header)
++{
++ char *buffer;
++ char *realpath = NULL;
++ char *argv0 = NULL;
++ char *symlink = NULL;
++#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
++ char *handler;
++#endif
++ char *cp = strchr(header, '\n');
++ int len;
++ if (!cp)
++ return;
++ cp = strchr(cp + 1, '\n');
++ if (!cp)
++ return;
++ *cp++ = '\0';
++ len = strlen(cp) + 1;
++ /* strstr() will return NULL if ordering is wrong. */
++ if (*cp == 'f') {
++ argv0 = strstr(header, " argv[]={ \"");
++ if (argv0) {
++ argv0 += 10;
++ len += ccs_truncate(argv0) + 14;
++ }
++ realpath = strstr(header, " exec={ realpath=\"");
++ if (realpath) {
++ realpath += 8;
++ len += ccs_truncate(realpath) + 6;
++ }
++ symlink = strstr(header, " symlink.target=\"");
++ if (symlink)
++ len += ccs_truncate(symlink + 1) + 1;
++ }
++#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
++ handler = strstr(header, "type=execute_handler");
++ if (handler)
++ len += ccs_truncate(handler) + 6;
++#endif
++ buffer = kmalloc(len, CCS_GFP_FLAGS);
++ if (!buffer)
++ return;
++ snprintf(buffer, len - 1, "%s", cp);
++#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
++ if (handler)
++ ccs_addprintf(buffer, len, " task.%s", handler);
++#endif
++ if (realpath)
++ ccs_addprintf(buffer, len, " exec.%s", realpath);
++ if (argv0)
++ ccs_addprintf(buffer, len, " exec.argv[0]=%s", argv0);
++ if (symlink)
++ ccs_addprintf(buffer, len, "%s", symlink);
++ ccs_normalize_line(buffer);
++ {
++ struct ccs_domain_info *domain = ccs_current_domain();
++ if (!ccs_write_acl(domain->ns, &domain->acl_info_list,
++ buffer, false))
++ ccs_update_stat(CCS_STAT_POLICY_UPDATES);
++ }
++ kfree(buffer);
++}
++
++/**
++ * ccs_domain_quota_ok - Check for domain's quota.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ *
++ * Returns true if the domain is not exceeded quota, false otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static bool ccs_domain_quota_ok(struct ccs_request_info *r)
++{
++ unsigned int count = 0;
++ struct ccs_domain_info * const domain = ccs_current_domain();
++ struct ccs_acl_info *ptr;
++ if (r->mode != CCS_CONFIG_LEARNING)
++ return false;
++ if (!domain)
++ return true;
++ list_for_each_entry_srcu(ptr, &domain->acl_info_list, list, &ccs_ss) {
++ u16 perm;
++ u8 i;
++ if (ptr->is_deleted)
++ continue;
++ switch (ptr->type) {
++ case CCS_TYPE_PATH_ACL:
++ case CCS_TYPE_PATH2_ACL:
++ case CCS_TYPE_PATH_NUMBER_ACL:
++ case CCS_TYPE_MKDEV_ACL:
++#ifdef CONFIG_CCSECURITY_NETWORK
++ case CCS_TYPE_INET_ACL:
++ case CCS_TYPE_UNIX_ACL:
++#endif
++ perm = ptr->perm;
++ break;
++#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
++ case CCS_TYPE_AUTO_EXECUTE_HANDLER:
++ case CCS_TYPE_DENIED_EXECUTE_HANDLER:
++#endif
++#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
++ case CCS_TYPE_AUTO_TASK_ACL:
++ case CCS_TYPE_MANUAL_TASK_ACL:
++#endif
++ perm = 0;
++ break;
++ default:
++ perm = 1;
++ }
++ for (i = 0; i < 16; i++)
++ if (perm & (1 << i))
++ count++;
++ }
++ if (count < ccs_profile(r->profile)->pref[CCS_PREF_MAX_LEARNING_ENTRY])
++ return true;
++ if (!domain->flags[CCS_DIF_QUOTA_WARNED]) {
++ domain->flags[CCS_DIF_QUOTA_WARNED] = true;
++ /* r->granted = false; */
++ ccs_write_log(r, "%s", ccs_dif[CCS_DIF_QUOTA_WARNED]);
++ printk(KERN_WARNING "WARNING: "
++ "Domain '%s' has too many ACLs to hold. "
++ "Stopped learning mode.\n", domain->domainname->name);
++ }
++ return false;
++}
++
++/**
++ * ccs_supervisor - Ask for the supervisor's decision.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ * @fmt: The printf()'s format string, followed by parameters.
++ *
++ * Returns 0 if the supervisor decided to permit the access request which
++ * violated the policy in enforcing mode, CCS_RETRY_REQUEST if the supervisor
++ * decided to retry the access request which violated the policy in enforcing
++ * mode, 0 if it is not in enforcing mode, -EPERM otherwise.
++ */
++static int ccs_supervisor(struct ccs_request_info *r, const char *fmt, ...)
++{
++ va_list args;
++ int error;
++ int len;
++ static unsigned int ccs_serial;
++ struct ccs_query entry = { };
++ bool quota_exceeded = false;
++ va_start(args, fmt);
++ len = vsnprintf((char *) &len, 1, fmt, args) + 1;
++ va_end(args);
++ /* Write /proc/ccs/audit. */
++ va_start(args, fmt);
++ ccs_write_log2(r, len, fmt, args);
++ va_end(args);
++ /* Nothing more to do if granted. */
++ if (r->granted)
++ return 0;
++ if (r->mode)
++ ccs_update_stat(r->mode);
++ switch (r->mode) {
++ int i;
++ struct ccs_profile *p;
++ case CCS_CONFIG_ENFORCING:
++ error = -EPERM;
++ if (atomic_read(&ccs_query_observers))
++ break;
++ if (r->dont_sleep_on_enforce_error)
++ goto out;
++ p = ccs_profile(r->profile);
++ /* Check enforcing_penalty parameter. */
++ for (i = 0; i < p->pref[CCS_PREF_ENFORCING_PENALTY]; i++) {
++ set_current_state(TASK_INTERRUPTIBLE);
++ schedule_timeout(HZ / 10);
++ }
++ goto out;
++ case CCS_CONFIG_LEARNING:
++ error = 0;
++ /* Check max_learning_entry parameter. */
++ if (ccs_domain_quota_ok(r))
++ break;
++ /* fall through */
++ default:
++ return 0;
++ }
++ /* Get message. */
++ va_start(args, fmt);
++ entry.query = ccs_init_log(r, len, fmt, args);
++ va_end(args);
++ if (!entry.query)
++ goto out;
++ entry.query_len = strlen(entry.query) + 1;
++ if (!error) {
++ ccs_add_entry(entry.query);
++ goto out;
++ }
++ len = ccs_round2(entry.query_len);
++ entry.domain = ccs_current_domain();
++ spin_lock(&ccs_query_list_lock);
++ if (ccs_memory_quota[CCS_MEMORY_QUERY] &&
++ ccs_memory_used[CCS_MEMORY_QUERY] + len
++ >= ccs_memory_quota[CCS_MEMORY_QUERY]) {
++ quota_exceeded = true;
++ } else {
++ entry.serial = ccs_serial++;
++ entry.retry = r->retry;
++ ccs_memory_used[CCS_MEMORY_QUERY] += len;
++ list_add_tail(&entry.list, &ccs_query_list);
++ }
++ spin_unlock(&ccs_query_list_lock);
++ if (quota_exceeded)
++ goto out;
++ /* Give 10 seconds for supervisor's opinion. */
++ while (entry.timer < 10) {
++ wake_up_all(&ccs_query_wait);
++ if (wait_event_interruptible_timeout
++ (ccs_answer_wait, entry.answer ||
++ !atomic_read(&ccs_query_observers), HZ))
++ break;
++ else
++ entry.timer++;
++ }
++ spin_lock(&ccs_query_list_lock);
++ list_del(&entry.list);
++ ccs_memory_used[CCS_MEMORY_QUERY] -= len;
++ spin_unlock(&ccs_query_list_lock);
++ switch (entry.answer) {
++ case 3: /* Asked to retry by administrator. */
++ error = CCS_RETRY_REQUEST;
++ r->retry++;
++ break;
++ case 1:
++ /* Granted by administrator. */
++ error = 0;
++ break;
++ default:
++ /* Timed out or rejected by administrator. */
++ break;
++ }
++out:
++ kfree(entry.query);
++ return error;
++}
++
++/**
++ * ccs_audit_log - Audit permission check log.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ *
++ * Returns return value of ccs_supervisor().
++ */
++int ccs_audit_log(struct ccs_request_info *r)
++{
++ switch (r->param_type) {
++ u8 type;
++ char buf[48];
++#ifdef CONFIG_CCSECURITY_NETWORK
++ const u32 *address;
++#endif
++ case CCS_TYPE_PATH_ACL:
++ return ccs_supervisor(r, "file %s %s\n", ccs_path_keyword
++ [r->param.path.operation],
++ r->param.path.filename->name);
++ case CCS_TYPE_PATH2_ACL:
++ return ccs_supervisor(r, "file %s %s %s\n", ccs_mac_keywords
++ [ccs_pp2mac[r->param.path2.operation]],
++ r->param.path2.filename1->name,
++ r->param.path2.filename2->name);
++ case CCS_TYPE_PATH_NUMBER_ACL:
++ type = r->param.path_number.operation;
++ switch (type) {
++ case CCS_TYPE_CREATE:
++ case CCS_TYPE_MKDIR:
++ case CCS_TYPE_MKFIFO:
++ case CCS_TYPE_MKSOCK:
++ case CCS_TYPE_CHMOD:
++ snprintf(buf, sizeof(buf), "0%lo",
++ r->param.path_number.number);
++ break;
++ case CCS_TYPE_IOCTL:
++ snprintf(buf, sizeof(buf), "0x%lX",
++ r->param.path_number.number);
++ break;
++ default:
++ snprintf(buf, sizeof(buf), "%lu",
++ r->param.path_number.number);
++ break;
++ }
++ return ccs_supervisor(r, "file %s %s %s\n", ccs_mac_keywords
++ [ccs_pn2mac[type]],
++ r->param.path_number.filename->name,
++ buf);
++ case CCS_TYPE_MKDEV_ACL:
++ return ccs_supervisor(r, "file %s %s 0%o %u %u\n",
++ ccs_mac_keywords
++ [ccs_pnnn2mac[r->param.mkdev.operation]],
++ r->param.mkdev.filename->name,
++ r->param.mkdev.mode,
++ r->param.mkdev.major,
++ r->param.mkdev.minor);
++ case CCS_TYPE_MOUNT_ACL:
++ return ccs_supervisor(r, "file mount %s %s %s 0x%lX\n",
++ r->param.mount.dev->name,
++ r->param.mount.dir->name,
++ r->param.mount.type->name,
++ r->param.mount.flags);
++#ifdef CONFIG_CCSECURITY_MISC
++ case CCS_TYPE_ENV_ACL:
++ return ccs_supervisor(r, "misc env %s\n",
++ r->param.environ.name->name);
++#endif
++#ifdef CONFIG_CCSECURITY_CAPABILITY
++ case CCS_TYPE_CAPABILITY_ACL:
++ return ccs_supervisor(r, "capability %s\n", ccs_mac_keywords
++ [ccs_c2mac[r->param.capability.
++ operation]]);
++#endif
++#ifdef CONFIG_CCSECURITY_NETWORK
++ case CCS_TYPE_INET_ACL:
++ address = r->param.inet_network.address;
++ if (r->param.inet_network.is_ipv6)
++ ccs_print_ipv6(buf, sizeof(buf),
++ (const struct in6_addr *) address);
++ else
++ ccs_print_ipv4(buf, sizeof(buf), address);
++ return ccs_supervisor(r, "network inet %s %s %s %u\n",
++ ccs_proto_keyword[r->param.inet_network.
++ protocol],
++ ccs_socket_keyword[r->param.inet_network.
++ operation],
++ buf, r->param.inet_network.port);
++ case CCS_TYPE_UNIX_ACL:
++ return ccs_supervisor(r, "network unix %s %s %s\n",
++ ccs_proto_keyword[r->param.
++ unix_network.protocol],
++ ccs_socket_keyword[r->param.unix_network.
++ operation],
++ r->param.unix_network.address->name);
++#endif
++#ifdef CONFIG_CCSECURITY_IPC
++ case CCS_TYPE_SIGNAL_ACL:
++ return ccs_supervisor(r, "ipc signal %d %s\n",
++ r->param.signal.sig,
++ r->param.signal.dest_pattern);
++#endif
++ }
++ return 0;
++}
++
++/**
++ * ccs_find_domain_by_qid - Get domain by query id.
++ *
++ * @serial: Query ID assigned by ccs_supervisor().
++ *
++ * Returns pointer to "struct ccs_domain_info" if found, NULL otherwise.
++ */
++static struct ccs_domain_info *ccs_find_domain_by_qid(unsigned int serial)
++{
++ struct ccs_query *ptr;
++ struct ccs_domain_info *domain = NULL;
++ spin_lock(&ccs_query_list_lock);
++ list_for_each_entry(ptr, &ccs_query_list, list) {
++ if (ptr->serial != serial)
++ continue;
++ domain = ptr->domain;
++ break;
++ }
++ spin_unlock(&ccs_query_list_lock);
++ return domain;
++}
++
++/**
++ * ccs_read_query - Read access requests which violated policy in enforcing mode.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ *
++ * Returns nothing.
++ */
++static void ccs_read_query(struct ccs_io_buffer *head)
++{
++ struct list_head *tmp;
++ unsigned int pos = 0;
++ size_t len = 0;
++ char *buf;
++ if (head->r.w_pos)
++ return;
++ kfree(head->read_buf);
++ head->read_buf = NULL;
++ spin_lock(&ccs_query_list_lock);
++ list_for_each(tmp, &ccs_query_list) {
++ struct ccs_query *ptr = list_entry(tmp, typeof(*ptr), list);
++ if (pos++ != head->r.query_index)
++ continue;
++ len = ptr->query_len;
++ break;
++ }
++ spin_unlock(&ccs_query_list_lock);
++ if (!len) {
++ head->r.query_index = 0;
++ return;
++ }
++ buf = kzalloc(len + 32, CCS_GFP_FLAGS);
++ if (!buf)
++ return;
++ pos = 0;
++ spin_lock(&ccs_query_list_lock);
++ list_for_each(tmp, &ccs_query_list) {
++ struct ccs_query *ptr = list_entry(tmp, typeof(*ptr), list);
++ if (pos++ != head->r.query_index)
++ continue;
++ /*
++ * Some query can be skipped because ccs_query_list
++ * can change, but I don't care.
++ */
++ if (len == ptr->query_len)
++ snprintf(buf, len + 31, "Q%u-%hu\n%s", ptr->serial,
++ ptr->retry, ptr->query);
++ break;
++ }
++ spin_unlock(&ccs_query_list_lock);
++ if (buf[0]) {
++ head->read_buf = buf;
++ head->r.w[head->r.w_pos++] = buf;
++ head->r.query_index++;
++ } else {
++ kfree(buf);
++ }
++}
++
++/**
++ * ccs_write_answer - Write the supervisor's decision.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ *
++ * Returns 0 on success, -EINVAL otherwise.
++ */
++static int ccs_write_answer(struct ccs_io_buffer *head)
++{
++ char *data = head->write_buf;
++ struct list_head *tmp;
++ unsigned int serial;
++ unsigned int answer;
++ spin_lock(&ccs_query_list_lock);
++ list_for_each(tmp, &ccs_query_list) {
++ struct ccs_query *ptr = list_entry(tmp, typeof(*ptr), list);
++ ptr->timer = 0;
++ }
++ spin_unlock(&ccs_query_list_lock);
++ if (sscanf(data, "A%u=%u", &serial, &answer) != 2)
++ return -EINVAL;
++ spin_lock(&ccs_query_list_lock);
++ list_for_each(tmp, &ccs_query_list) {
++ struct ccs_query *ptr = list_entry(tmp, typeof(*ptr), list);
++ if (ptr->serial != serial)
++ continue;
++ ptr->answer = (u8) answer;
++ /* Remove from ccs_query_list. */
++ if (ptr->answer) {
++ list_del(&ptr->list);
++ INIT_LIST_HEAD(&ptr->list);
++ }
++ break;
++ }
++ spin_unlock(&ccs_query_list_lock);
++ wake_up_all(&ccs_answer_wait);
++ return 0;
++}
++
++/**
++ * ccs_read_version - Get version.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ *
++ * Returns nothing.
++ */
++static void ccs_read_version(struct ccs_io_buffer *head)
++{
++ if (head->r.eof)
++ return;
++ ccs_set_string(head, "1.8.4");
++ head->r.eof = true;
++}
++
++/**
++ * ccs_update_stat - Update statistic counters.
++ *
++ * @index: Index for policy type.
++ *
++ * Returns nothing.
++ */
++static void ccs_update_stat(const u8 index)
++{
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0)
++ struct timeval tv;
++ do_gettimeofday(&tv);
++ /*
++ * I don't use atomic operations because race condition is not fatal.
++ */
++ ccs_stat_updated[index]++;
++ ccs_stat_modified[index] = tv.tv_sec;
++#else
++ /*
++ * I don't use atomic operations because race condition is not fatal.
++ */
++ ccs_stat_updated[index]++;
++ ccs_stat_modified[index] = get_seconds();
++#endif
++}
++
++/**
++ * ccs_read_stat - Read statistic data.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ *
++ * Returns nothing.
++ */
++static void ccs_read_stat(struct ccs_io_buffer *head)
++{
++ u8 i;
++ unsigned int total = 0;
++ if (head->r.eof)
++ return;
++ for (i = 0; i < CCS_MAX_POLICY_STAT; i++) {
++ ccs_io_printf(head, "Policy %-30s %10u", ccs_policy_headers[i],
++ ccs_stat_updated[i]);
++ if (ccs_stat_modified[i]) {
++ struct ccs_time stamp;
++ ccs_convert_time(ccs_stat_modified[i], &stamp);
++ ccs_io_printf(head, " (Last: %04u/%02u/%02u "
++ "%02u:%02u:%02u)",
++ stamp.year, stamp.month, stamp.day,
++ stamp.hour, stamp.min, stamp.sec);
++ }
++ ccs_set_lf(head);
++ }
++ for (i = 0; i < CCS_MAX_MEMORY_STAT; i++) {
++ unsigned int used = ccs_memory_used[i];
++ total += used;
++ ccs_io_printf(head, "Memory used by %-22s %10u",
++ ccs_memory_headers[i], used);
++ used = ccs_memory_quota[i];
++ if (used)
++ ccs_io_printf(head, " (Quota: %10u)", used);
++ ccs_set_lf(head);
++ }
++ ccs_io_printf(head, "Total memory used: %10u\n",
++ total);
++ head->r.eof = true;
++}
++
++/**
++ * ccs_write_stat - Set memory quota.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ *
++ * Returns 0.
++ */
++static int ccs_write_stat(struct ccs_io_buffer *head)
++{
++ char *data = head->write_buf;
++ u8 i;
++ if (ccs_str_starts(&data, "Memory used by "))
++ for (i = 0; i < CCS_MAX_MEMORY_STAT; i++)
++ if (ccs_str_starts(&data, ccs_memory_headers[i])) {
++ if (*data == ' ')
++ data++;
++ ccs_memory_quota[i] =
++ simple_strtoul(data, NULL, 10);
++ }
++ return 0;
++}
++
++/**
++ * ccs_print_bprm - Print "struct linux_binprm" for auditing.
++ *
++ * @bprm: Pointer to "struct linux_binprm".
++ * @dump: Pointer to "struct ccs_page_dump".
++ *
++ * Returns the contents of @bprm on success, NULL otherwise.
++ *
++ * This function uses kzalloc(), so caller must kfree() if this function
++ * didn't return NULL.
++ */
++static char *ccs_print_bprm(struct linux_binprm *bprm,
++ struct ccs_page_dump *dump)
++{
++ static const int ccs_buffer_len = 4096 * 2;
++ char *buffer = kzalloc(ccs_buffer_len, CCS_GFP_FLAGS);
++ char *cp;
++ char *last_start;
++ int len;
++ unsigned long pos = bprm->p;
++ int offset = pos % PAGE_SIZE;
++ int argv_count = bprm->argc;
++ int envp_count = bprm->envc;
++ bool truncated = false;
++ if (!buffer)
++ return NULL;
++ len = snprintf(buffer, ccs_buffer_len - 1, "argv[]={ ");
++ cp = buffer + len;
++ if (!argv_count) {
++ memmove(cp, "} envp[]={ ", 11);
++ cp += 11;
++ }
++ last_start = cp;
++ while (argv_count || envp_count) {
++ if (!ccs_dump_page(bprm, pos, dump))
++ goto out;
++ pos += PAGE_SIZE - offset;
++ /* Read. */
++ while (offset < PAGE_SIZE) {
++ const char *kaddr = dump->data;
++ const unsigned char c = kaddr[offset++];
++ if (cp == last_start)
++ *cp++ = '"';
++ if (cp >= buffer + ccs_buffer_len - 32) {
++ /* Reserve some room for "..." string. */
++ truncated = true;
++ } else if (c == '\\') {
++ *cp++ = '\\';
++ *cp++ = '\\';
++ } else if (c > ' ' && c < 127) {
++ *cp++ = c;
++ } else if (!c) {
++ *cp++ = '"';
++ *cp++ = ' ';
++ last_start = cp;
++ } else {
++ *cp++ = '\\';
++ *cp++ = (c >> 6) + '0';
++ *cp++ = ((c >> 3) & 7) + '0';
++ *cp++ = (c & 7) + '0';
++ }
++ if (c)
++ continue;
++ if (argv_count) {
++ if (--argv_count == 0) {
++ if (truncated) {
++ cp = last_start;
++ memmove(cp, "... ", 4);
++ cp += 4;
++ }
++ memmove(cp, "} envp[]={ ", 11);
++ cp += 11;
++ last_start = cp;
++ truncated = false;
++ }
++ } else if (envp_count) {
++ if (--envp_count == 0) {
++ if (truncated) {
++ cp = last_start;
++ memmove(cp, "... ", 4);
++ cp += 4;
++ }
++ }
++ }
++ if (!argv_count && !envp_count)
++ break;
++ }
++ offset = 0;
++ }
++ *cp++ = '}';
++ *cp = '\0';
++ return buffer;
++out:
++ snprintf(buffer, ccs_buffer_len - 1, "argv[]={ ... } envp[]= { ... }");
++ return buffer;
++}
++
++/**
++ * ccs_filetype - Get string representation of file type.
++ *
++ * @mode: Mode value for stat().
++ *
++ * Returns file type string.
++ */
++static inline const char *ccs_filetype(const umode_t mode)
++{
++ switch (mode & S_IFMT) {
++ case S_IFREG:
++ case 0:
++ return ccs_condition_keyword[CCS_TYPE_IS_FILE];
++ case S_IFDIR:
++ return ccs_condition_keyword[CCS_TYPE_IS_DIRECTORY];
++ case S_IFLNK:
++ return ccs_condition_keyword[CCS_TYPE_IS_SYMLINK];
++ case S_IFIFO:
++ return ccs_condition_keyword[CCS_TYPE_IS_FIFO];
++ case S_IFSOCK:
++ return ccs_condition_keyword[CCS_TYPE_IS_SOCKET];
++ case S_IFBLK:
++ return ccs_condition_keyword[CCS_TYPE_IS_BLOCK_DEV];
++ case S_IFCHR:
++ return ccs_condition_keyword[CCS_TYPE_IS_CHAR_DEV];
++ }
++ return "unknown"; /* This should not happen. */
++}
++
++/**
++ * ccs_print_header - Get header line of audit log.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ *
++ * Returns string representation.
++ *
++ * This function uses kmalloc(), so caller must kfree() if this function
++ * didn't return NULL.
++ */
++static char *ccs_print_header(struct ccs_request_info *r)
++{
++ struct ccs_time stamp;
++ struct ccs_obj_info *obj = r->obj;
++ const u32 ccs_flags = ccs_current_flags();
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 24)
++ const pid_t gpid = ccs_sys_getpid();
++#else
++ const pid_t gpid = task_pid_nr(current);
++#endif
++ static const int ccs_buffer_len = 4096;
++ char *buffer = kmalloc(ccs_buffer_len, CCS_GFP_FLAGS);
++ int pos;
++ u8 i;
++ if (!buffer)
++ return NULL;
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0)
++ {
++ struct timeval tv;
++ do_gettimeofday(&tv);
++ ccs_convert_time(tv.tv_sec, &stamp);
++ }
++#else
++ ccs_convert_time(get_seconds(), &stamp);
++#endif
++ pos = snprintf(buffer, ccs_buffer_len - 1,
++ "#%04u/%02u/%02u %02u:%02u:%02u# profile=%u mode=%s "
++ "granted=%s (global-pid=%u) task={ pid=%u ppid=%u "
++ "uid=%u gid=%u euid=%u egid=%u suid=%u sgid=%u "
++ "fsuid=%u fsgid=%u type%s=execute_handler }",
++ stamp.year, stamp.month, stamp.day, stamp.hour,
++ stamp.min, stamp.sec, r->profile, ccs_mode[r->mode],
++ ccs_yesno(r->granted), gpid, ccs_sys_getpid(),
++ ccs_sys_getppid(),
++ from_kuid(&init_user_ns, current_uid()),
++ from_kgid(&init_user_ns, current_gid()),
++ from_kuid(&init_user_ns, current_euid()),
++ from_kgid(&init_user_ns, current_egid()),
++ from_kuid(&init_user_ns, current_suid()),
++ from_kgid(&init_user_ns, current_sgid()),
++ from_kuid(&init_user_ns, current_fsuid()),
++ from_kgid(&init_user_ns, current_fsgid()),
++ ccs_flags & CCS_TASK_IS_EXECUTE_HANDLER ? "" : "!");
++ if (!obj)
++ goto no_obj_info;
++ if (!obj->validate_done) {
++ ccs_get_attributes(obj);
++ obj->validate_done = true;
++ }
++ for (i = 0; i < CCS_MAX_PATH_STAT; i++) {
++ struct ccs_mini_stat *stat;
++ unsigned int dev;
++ umode_t mode;
++ if (!obj->stat_valid[i])
++ continue;
++ stat = &obj->stat[i];
++ dev = stat->dev;
++ mode = stat->mode;
++ if (i & 1) {
++ pos += snprintf(buffer + pos, ccs_buffer_len - 1 - pos,
++ " path%u.parent={ uid=%u gid=%u "
++ "ino=%lu perm=0%o }", (i >> 1) + 1,
++ from_kuid(&init_user_ns, stat->uid),
++ from_kgid(&init_user_ns, stat->gid),
++ (unsigned long) stat->ino,
++ stat->mode & S_IALLUGO);
++ continue;
++ }
++ pos += snprintf(buffer + pos, ccs_buffer_len - 1 - pos,
++ " path%u={ uid=%u gid=%u ino=%lu major=%u"
++ " minor=%u perm=0%o type=%s", (i >> 1) + 1,
++ from_kuid(&init_user_ns, stat->uid),
++ from_kgid(&init_user_ns, stat->gid),
++ (unsigned long) stat->ino, MAJOR(dev),
++ MINOR(dev), mode & S_IALLUGO,
++ ccs_filetype(mode));
++ if (S_ISCHR(mode) || S_ISBLK(mode)) {
++ dev = stat->rdev;
++ pos += snprintf(buffer + pos, ccs_buffer_len - 1 - pos,
++ " dev_major=%u dev_minor=%u",
++ MAJOR(dev), MINOR(dev));
++ }
++ pos += snprintf(buffer + pos, ccs_buffer_len - 1 - pos, " }");
++ }
++no_obj_info:
++ if (pos < ccs_buffer_len - 1)
++ return buffer;
++ kfree(buffer);
++ return NULL;
++}
++
++/**
++ * ccs_init_log - Allocate buffer for audit logs.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ * @len: Buffer size needed for @fmt and @args.
++ * @fmt: The printf()'s format string.
++ * @args: va_list structure for @fmt.
++ *
++ * Returns pointer to allocated memory.
++ *
++ * This function uses kzalloc(), so caller must kfree() if this function
++ * didn't return NULL.
++ */
++static char *ccs_init_log(struct ccs_request_info *r, int len, const char *fmt,
++ va_list args)
++{
++ char *buf = NULL;
++ char *bprm_info = NULL;
++ char *realpath = NULL;
++ const char *symlink = NULL;
++ const char *header = NULL;
++ int pos;
++ const char *domainname = ccs_current_domain()->domainname->name;
++ header = ccs_print_header(r);
++ if (!header)
++ return NULL;
++ /* +10 is for '\n' etc. and '\0'. */
++ len += strlen(domainname) + strlen(header) + 10;
++ if (r->ee) {
++ struct file *file = r->ee->bprm->file;
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
++ struct path path = { file->f_vfsmnt, file->f_dentry };
++ realpath = ccs_realpath(&path);
++#else
++ realpath = ccs_realpath(&file->f_path);
++#endif
++ bprm_info = ccs_print_bprm(r->ee->bprm, &r->ee->dump);
++ if (!realpath || !bprm_info)
++ goto out;
++ /* +80 is for " exec={ realpath=\"%s\" argc=%d envc=%d %s }" */
++ len += strlen(realpath) + 80 + strlen(bprm_info);
++ } else if (r->obj && r->obj->symlink_target) {
++ symlink = r->obj->symlink_target->name;
++ /* +18 is for " symlink.target=\"%s\"" */
++ len += 18 + strlen(symlink);
++ }
++ len = ccs_round2(len);
++ buf = kzalloc(len, CCS_GFP_FLAGS);
++ if (!buf)
++ goto out;
++ len--;
++ pos = snprintf(buf, len, "%s", header);
++ if (realpath) {
++ struct linux_binprm *bprm = r->ee->bprm;
++ pos += snprintf(buf + pos, len - pos,
++ " exec={ realpath=\"%s\" argc=%d envc=%d %s }",
++ realpath, bprm->argc, bprm->envc, bprm_info);
++ } else if (symlink)
++ pos += snprintf(buf + pos, len - pos, " symlink.target=\"%s\"",
++ symlink);
++ pos += snprintf(buf + pos, len - pos, "\n%s\n", domainname);
++ vsnprintf(buf + pos, len - pos, fmt, args);
++out:
++ kfree(realpath);
++ kfree(bprm_info);
++ kfree(header);
++ return buf;
++}
++
++/**
++ * ccs_transition_failed - Print waning message and send signal when domain transition failed.
++ *
++ * @domainname: Name of domain to transit.
++ *
++ * Returns nothing.
++ *
++ * Note that if current->pid == 1, sending SIGKILL won't work.
++ */
++void ccs_transition_failed(const char *domainname)
++{
++ printk(KERN_WARNING
++ "ERROR: Unable to transit to '%s' domain.\n", domainname);
++ force_sig(SIGKILL, current);
++}
++
++/**
++ * ccs_update_task_domain - Update task's domain.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ *
++ * Returns nothing.
++ *
++ * The task will retry as hard as possible. But if domain transition failed,
++ * the task will be killed by SIGKILL.
++ */
++static void ccs_update_task_domain(struct ccs_request_info *r)
++{
++ char *buf;
++ const char *cp;
++ const struct ccs_acl_info *acl = r->matched_acl;
++ r->matched_acl = NULL;
++ if (!acl || !acl->cond || !acl->cond->transit ||
++ acl->cond->exec_transit)
++ return;
++ while (1) {
++ buf = kzalloc(CCS_EXEC_TMPSIZE, CCS_GFP_FLAGS);
++ if (buf)
++ break;
++ ssleep(1);
++ if (fatal_signal_pending(current))
++ return;
++ }
++ cp = acl->cond->transit->name;
++ if (*cp == '/')
++ snprintf(buf, CCS_EXEC_TMPSIZE - 1, "%s %s",
++ ccs_current_domain()->domainname->name, cp);
++ else
++ strncpy(buf, cp, CCS_EXEC_TMPSIZE - 1);
++ if (!ccs_assign_domain(buf, true))
++ ccs_transition_failed(buf);
++ kfree(buf);
++}
++
++/**
++ * ccs_get_audit - Get audit mode.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ *
++ * Returns true if this request should be audited, false otherwise.
++ */
++static bool ccs_get_audit(const struct ccs_request_info *r)
++{
++ const struct ccs_acl_info *matched_acl = r->matched_acl;
++ const u8 profile = r->profile;
++ const u8 index = r->type;
++ const bool is_granted = r->granted;
++ u8 mode;
++ struct ccs_profile *p;
++ if (!ccs_policy_loaded)
++ return false;
++ p = ccs_profile(profile);
++ if (ccs_log_count >= p->pref[CCS_PREF_MAX_AUDIT_LOG])
++ return false;
++ if (is_granted && matched_acl && matched_acl->cond &&
++ matched_acl->cond->grant_log != CCS_GRANTLOG_AUTO)
++ return matched_acl->cond->grant_log == CCS_GRANTLOG_YES;
++ mode = p->config[index];
++ if (mode == CCS_CONFIG_USE_DEFAULT)
++ mode = p->config
++ [ccs_index2category[index] + CCS_MAX_MAC_INDEX];
++ if (mode == CCS_CONFIG_USE_DEFAULT)
++ mode = p->default_config;
++ if (is_granted)
++ return mode & CCS_CONFIG_WANT_GRANT_LOG;
++ return mode & CCS_CONFIG_WANT_REJECT_LOG;
++}
++
++/**
++ * ccs_write_log2 - Write an audit log.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ * @len: Buffer size needed for @fmt and @args.
++ * @fmt: The printf()'s format string.
++ * @args: va_list structure for @fmt.
++ *
++ * Returns nothing.
++ */
++static void ccs_write_log2(struct ccs_request_info *r, int len,
++ const char *fmt, va_list args)
++{
++ char *buf;
++ struct ccs_log *entry;
++ bool quota_exceeded = false;
++ if (!ccs_get_audit(r))
++ goto out;
++ buf = ccs_init_log(r, len, fmt, args);
++ if (!buf)
++ goto out;
++ entry = kzalloc(sizeof(*entry), CCS_GFP_FLAGS);
++ if (!entry) {
++ kfree(buf);
++ goto out;
++ }
++ entry->log = buf;
++ len = ccs_round2(strlen(buf) + 1);
++ /*
++ * The entry->size is used for memory quota checks.
++ * Don't go beyond strlen(entry->log).
++ */
++ entry->size = len + ccs_round2(sizeof(*entry));
++ spin_lock(&ccs_log_lock);
++ if (ccs_memory_quota[CCS_MEMORY_AUDIT] &&
++ ccs_memory_used[CCS_MEMORY_AUDIT] + entry->size >=
++ ccs_memory_quota[CCS_MEMORY_AUDIT]) {
++ quota_exceeded = true;
++ } else {
++ ccs_memory_used[CCS_MEMORY_AUDIT] += entry->size;
++ list_add_tail(&entry->list, &ccs_log);
++ ccs_log_count++;
++ }
++ spin_unlock(&ccs_log_lock);
++ if (quota_exceeded) {
++ kfree(buf);
++ kfree(entry);
++ goto out;
++ }
++ wake_up(&ccs_log_wait);
++out:
++ ccs_update_task_domain(r);
++}
++
++/**
++ * ccs_write_log - Write an audit log.
++ *
++ * @r: Pointer to "struct ccs_request_info".
++ * @fmt: The printf()'s format string, followed by parameters.
++ *
++ * Returns nothing.
++ */
++void ccs_write_log(struct ccs_request_info *r, const char *fmt, ...)
++{
++ va_list args;
++ int len;
++ va_start(args, fmt);
++ len = vsnprintf((char *) &len, 1, fmt, args) + 1;
++ va_end(args);
++ va_start(args, fmt);
++ ccs_write_log2(r, len, fmt, args);
++ va_end(args);
++}
++
++/**
++ * ccs_read_log - Read an audit log.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ *
++ * Returns nothing.
++ */
++static void ccs_read_log(struct ccs_io_buffer *head)
++{
++ struct ccs_log *ptr = NULL;
++ if (head->r.w_pos)
++ return;
++ kfree(head->read_buf);
++ head->read_buf = NULL;
++ spin_lock(&ccs_log_lock);
++ if (!list_empty(&ccs_log)) {
++ ptr = list_entry(ccs_log.next, typeof(*ptr), list);
++ list_del(&ptr->list);
++ ccs_log_count--;
++ ccs_memory_used[CCS_MEMORY_AUDIT] -= ptr->size;
++ }
++ spin_unlock(&ccs_log_lock);
++ if (ptr) {
++ head->read_buf = ptr->log;
++ head->r.w[head->r.w_pos++] = head->read_buf;
++ kfree(ptr);
++ }
++}
++
++/**
++ * ccs_set_namespace_cursor - Set namespace to read.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ *
++ * Returns nothing.
++ */
++static void ccs_set_namespace_cursor(struct ccs_io_buffer *head)
++{
++ struct list_head *ns;
++ if (head->type != CCS_EXCEPTION_POLICY && head->type != CCS_PROFILE)
++ return;
++ /*
++ * If this is the first read, or reading previous namespace finished
++ * and has more namespaces to read, update the namespace cursor.
++ */
++ ns = head->r.ns;
++ if (!ns || (head->r.eof && ns->next != &ccs_namespace_list)) {
++ /* Clearing is OK because ccs_flush() returned true. */
++ memset(&head->r, 0, sizeof(head->r));
++ head->r.ns = ns ? ns->next : ccs_namespace_list.next;
++ }
++}
++
++/**
++ * ccs_has_more_namespace - Check for unread namespaces.
++ *
++ * @head: Pointer to "struct ccs_io_buffer".
++ *
++ * Returns true if we have more entries to print, false otherwise.
++ */
++static bool ccs_has_more_namespace(struct ccs_io_buffer *head)
++{
++ return (head->type == CCS_EXCEPTION_POLICY ||
++ head->type == CCS_PROFILE) && head->r.eof &&
++ head->r.ns->next != &ccs_namespace_list;
++}
++
++/**
++ * ccs_find_namespace - Find specified namespace.
++ *
++ * @name: Name of namespace to find.
++ * @len: Length of @name.
++ *
++ * Returns pointer to "struct ccs_policy_namespace" if found, NULL otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static struct ccs_policy_namespace *ccs_find_namespace(const char *name,
++ const unsigned int len)
++{
++ struct ccs_policy_namespace *ns;
++ list_for_each_entry_srcu(ns, &ccs_namespace_list, namespace_list,
++ &ccs_ss) {
++ if (strncmp(name, ns->name, len) ||
++ (name[len] && name[len] != ' '))
++ continue;
++ return ns;
++ }
++ return NULL;
++}
++
++/**
++ * ccs_assign_namespace - Create a new namespace.
++ *
++ * @domainname: Name of namespace to create.
++ *
++ * Returns pointer to "struct ccs_policy_namespace" on success, NULL otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static struct ccs_policy_namespace *ccs_assign_namespace
++(const char *domainname)
++{
++ struct ccs_policy_namespace *ptr;
++ struct ccs_policy_namespace *entry;
++ const char *cp = domainname;
++ unsigned int len = 0;
++ while (*cp && *cp++ != ' ')
++ len++;
++ ptr = ccs_find_namespace(domainname, len);
++ if (ptr)
++ return ptr;
++ if (len >= CCS_EXEC_TMPSIZE - 10 || !ccs_domain_def(domainname))
++ return NULL;
++ entry = kzalloc(sizeof(*entry) + len + 1, CCS_GFP_FLAGS);
++ if (!entry)
++ return NULL;
++ if (mutex_lock_interruptible(&ccs_policy_lock))
++ goto out;
++ ptr = ccs_find_namespace(domainname, len);
++ if (!ptr && ccs_memory_ok(entry, sizeof(*entry) + len + 1)) {
++ char *name = (char *) (entry + 1);
++ ptr = entry;
++ memmove(name, domainname, len);
++ name[len] = '\0';
++ entry->name = name;
++ ccs_init_policy_namespace(entry);
++ entry = NULL;
++ }
++ mutex_unlock(&ccs_policy_lock);
++out:
++ kfree(entry);
++ return ptr;
++}
++
++/**
++ * ccs_namespace_jump - Check for namespace jump.
++ *
++ * @domainname: Name of domain.
++ *
++ * Returns true if namespace differs, false otherwise.
++ */
++static bool ccs_namespace_jump(const char *domainname)
++{
++ const char *namespace = ccs_current_namespace()->name;
++ const int len = strlen(namespace);
++ return strncmp(domainname, namespace, len) ||
++ (domainname[len] && domainname[len] != ' ');
++}
++
++/**
++ * ccs_assign_domain - Create a domain or a namespace.
++ *
++ * @domainname: The name of domain.
++ * @transit: True if transit to domain found or created.
++ *
++ * Returns pointer to "struct ccs_domain_info" on success, NULL otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++struct ccs_domain_info *ccs_assign_domain(const char *domainname,
++ const bool transit)
++{
++ struct ccs_security *security = ccs_current_security();
++ struct ccs_domain_info e = { };
++ struct ccs_domain_info *entry = ccs_find_domain(domainname);
++ bool created = false;
++ if (entry) {
++ if (transit) {
++ /*
++ * Since namespace is created at runtime, profiles may
++ * not be created by the moment the process transits to
++ * that domain. Do not perform domain transition if
++ * profile for that domain is not yet created.
++ */
++ if (ccs_policy_loaded &&
++ !entry->ns->profile_ptr[entry->profile])
++ return NULL;
++ security->ccs_domain_info = entry;
++ }
++ return entry;
++ }
++ /* Requested domain does not exist. */
++ /* Don't create requested domain if domainname is invalid. */
++ if (strlen(domainname) >= CCS_EXEC_TMPSIZE - 10 ||
++ !ccs_correct_domain(domainname))
++ return NULL;
++ /*
++ * Since definition of profiles and acl_groups may differ across
++ * namespaces, do not inherit "use_profile" and "use_group" settings
++ * by automatically creating requested domain upon domain transition.
++ */
++ if (transit && ccs_namespace_jump(domainname))
++ return NULL;
++ e.ns = ccs_assign_namespace(domainname);
++ if (!e.ns)
++ return NULL;
++ /*
++ * "use_profile" and "use_group" settings for automatically created
++ * domains are inherited from current domain. These are 0 for manually
++ * created domains.
++ */
++ if (transit) {
++ const struct ccs_domain_info *domain =
++ security->ccs_domain_info;
++ e.profile = domain->profile;
++ memcpy(e.group, domain->group, sizeof(e.group));
++ }
++ e.domainname = ccs_get_name(domainname);
++ if (!e.domainname)
++ return NULL;
++ if (mutex_lock_interruptible(&ccs_policy_lock))
++ goto out;
++ entry = ccs_find_domain(domainname);
++ if (!entry) {
++ entry = ccs_commit_ok(&e, sizeof(e));
++ if (entry) {
++ INIT_LIST_HEAD(&entry->acl_info_list);
++ list_add_tail_rcu(&entry->list, &ccs_domain_list);
++ created = true;
++ }
++ }
++ mutex_unlock(&ccs_policy_lock);
++out:
++ ccs_put_name(e.domainname);
++ if (entry && transit) {
++ security->ccs_domain_info = entry;
++ if (created) {
++ struct ccs_request_info r;
++ int i;
++ ccs_init_request_info(&r, CCS_MAC_FILE_EXECUTE);
++ r.granted = false;
++ ccs_write_log(&r, "use_profile %u\n", entry->profile);
++ for (i = 0; i < CCS_MAX_ACL_GROUPS; i++)
++ if (test_bit(i, entry->group))
++ ccs_write_log(&r, "use_group %u\n", i);
++ ccs_update_stat(CCS_STAT_POLICY_UPDATES);
++ }
++ }
++ return entry;
++}
++
++/**
++ * ccs_parse_policy - Parse a policy line.
++ *
++ * @head: Poiter to "struct ccs_io_buffer".
++ * @line: Line to parse.
++ *
++ * Returns 0 on success, negative value otherwise.
++ *
++ * Caller holds ccs_read_lock().
++ */
++static int ccs_parse_policy(struct ccs_io_buffer *head, char *line)
++{
++ /* Delete request? */
++ head->w.is_delete = !strncmp(line, "delete ", 7);
++ if (head->w.is_delete)
++ memmove(line, line + 7, strlen(line + 7) + 1);
++ /* Selecting namespace to update. */
++ if (head->type == CCS_EXCEPTION_POLICY || head->type == CCS_PROFILE) {
++ if (*line == '<') {
++ char *cp = strchr(line, ' ');
++ if (cp) {
++ *cp++ = '\0';
++ head->w.ns = ccs_assign_namespace(line);
++ memmove(line, cp, strlen(cp) + 1);
++ } else
++ head->w.ns = NULL;
++ } else
++ head->w.ns = &ccs_kernel_namespace;
++ /* Don't allow updating if namespace is invalid. */
++ if (!head->w.ns)
++ return -ENOENT;
++ }
++ /* Do the update. */
++ switch (head->type) {
++ case CCS_DOMAIN_POLICY:
++ return ccs_write_domain(head);
++ case CCS_EXCEPTION_POLICY:
++ return ccs_write_exception(head);
++#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
++ case CCS_EXECUTE_HANDLER:
++#endif
++ case CCS_PROCESS_STATUS:
++ return ccs_write_pid(head);
++ case CCS_STAT:
++ return ccs_write_stat(head);
++ case CCS_PROFILE:
++ return ccs_write_profile(head);
++ case CCS_QUERY:
++ return ccs_write_answer(head);
++ case CCS_MANAGER:
++ return ccs_write_manager(head);
++ default:
++ return -ENOSYS;
++ }
++}
++
++/**
++ * ccs_policy_io_init - Register hooks for policy I/O.
++ *
++ * Returns nothing.
++ */
++static void __init ccs_policy_io_init(void)
++{
++ ccsecurity_ops.check_profile = ccs_check_profile;
++}
++
++/**
++ * ccs_load_builtin_policy - Load built-in policy.
++ *
++ * Returns nothing.
++ */
++static void __init ccs_load_builtin_policy(void)
++{
++ /*
++ * This include file is manually created and contains built-in policy
++ * named "ccs_builtin_profile", "ccs_builtin_exception_policy",
++ * "ccs_builtin_domain_policy", "ccs_builtin_manager",
++ * "ccs_builtin_stat" in the form of "static char [] __initdata".
++ */
++#include "builtin-policy.h"
++ u8 i;
++ const int idx = ccs_read_lock();
++ for (i = 0; i < 5; i++) {
++ struct ccs_io_buffer head = { };
++ char *start = "";
++ switch (i) {
++ case 0:
++ start = ccs_builtin_profile;
++ head.type = CCS_PROFILE;
++ break;
++ case 1:
++ start = ccs_builtin_exception_policy;
++ head.type = CCS_EXCEPTION_POLICY;
++ break;
++ case 2:
++ start = ccs_builtin_domain_policy;
++ head.type = CCS_DOMAIN_POLICY;
++ break;
++ case 3:
++ start = ccs_builtin_manager;
++ head.type = CCS_MANAGER;
++ break;
++ case 4:
++ start = ccs_builtin_stat;
++ head.type = CCS_STAT;
++ break;
++ }
++ while (1) {
++ char *end = strchr(start, '\n');
++ if (!end)
++ break;
++ *end = '\0';
++ ccs_normalize_line(start);
++ head.write_buf = start;
++ ccs_parse_policy(&head, start);
++ start = end + 1;
++ }
++ }
++ ccs_read_unlock(idx);
++#ifdef CONFIG_CCSECURITY_OMIT_USERSPACE_LOADER
++ ccs_check_profile();
++#endif
++}
++
++/**
++ * ccs_read_self - read() for /proc/ccs/self_domain interface.
++ *
++ * @file: Pointer to "struct file".
++ * @buf: Domainname which current thread belongs to.
++ * @count: Size of @buf.
++ * @ppos: Bytes read by now.
++ *
++ * Returns read size on success, negative value otherwise.
++ */
++static ssize_t ccs_read_self(struct file *file, char __user *buf, size_t count,
++ loff_t *ppos)
++{
++ const char *domain = ccs_current_domain()->domainname->name;
++ loff_t len = strlen(domain);
++ loff_t pos = *ppos;
++ if (pos >= len || !count)
++ return 0;
++ len -= pos;
++ if (count < len)
++ len = count;
++ if (copy_to_user(buf, domain + pos, len))
++ return -EFAULT;
++ *ppos += len;
++ return len;
++}
++
++/**
++ * ccs_open - open() for /proc/ccs/ interface.
++ *
++ * @inode: Pointer to "struct inode".
++ * @file: Pointer to "struct file".
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int ccs_open(struct inode *inode, struct file *file)
++{
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 10, 0)
++ const u8 type = (unsigned long) PDE_DATA(inode);
++#else
++ const u8 type = (unsigned long) PDE(inode)->data;
++#endif
++ struct ccs_io_buffer *head = kzalloc(sizeof(*head), CCS_GFP_FLAGS);
++ if (!head)
++ return -ENOMEM;
++ mutex_init(&head->io_sem);
++ head->type = type;
++#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
++ if (type == CCS_EXECUTE_HANDLER) {
++ /* Allow execute_handler to read process's status. */
++ if (!(ccs_current_flags() & CCS_TASK_IS_EXECUTE_HANDLER)) {
++ kfree(head);
++ return -EPERM;
++ }
++ }
++#endif
++ if ((file->f_mode & FMODE_READ) && type != CCS_AUDIT &&
++ type != CCS_QUERY) {
++ /* Don't allocate read_buf for poll() access. */
++ head->readbuf_size = 4096;
++ head->read_buf = kzalloc(head->readbuf_size, CCS_GFP_FLAGS);
++ if (!head->read_buf) {
++ kfree(head);
++ return -ENOMEM;
++ }
++ }
++ if (file->f_mode & FMODE_WRITE) {
++ head->writebuf_size = 4096;
++ head->write_buf = kzalloc(head->writebuf_size, CCS_GFP_FLAGS);
++ if (!head->write_buf) {
++ kfree(head->read_buf);
++ kfree(head);
++ return -ENOMEM;
++ }
++ }
++ /*
++ * If the file is /proc/ccs/query, increment the observer counter.
++ * The obserber counter is used by ccs_supervisor() to see if
++ * there is some process monitoring /proc/ccs/query.
++ */
++ if (type == CCS_QUERY)
++ atomic_inc(&ccs_query_observers);
++ file->private_data = head;
++ ccs_notify_gc(head, true);
++ return 0;
++}
++
++/**
++ * ccs_release - close() for /proc/ccs/ interface.
++ *
++ * @inode: Pointer to "struct inode".
++ * @file: Pointer to "struct file".
++ *
++ * Returns 0.
++ */
++static int ccs_release(struct inode *inode, struct file *file)
++{
++ struct ccs_io_buffer *head = file->private_data;
++ /*
++ * If the file is /proc/ccs/query, decrement the observer counter.
++ */
++ if (head->type == CCS_QUERY &&
++ atomic_dec_and_test(&ccs_query_observers))
++ wake_up_all(&ccs_answer_wait);
++ ccs_notify_gc(head, false);
++ return 0;
++}
++
++/**
++ * ccs_poll - poll() for /proc/ccs/ interface.
++ *
++ * @file: Pointer to "struct file".
++ * @wait: Pointer to "poll_table". Maybe NULL.
++ *
++ * Returns POLLIN | POLLRDNORM | POLLOUT | POLLWRNORM if ready to read/write,
++ * POLLOUT | POLLWRNORM otherwise.
++ */
++static unsigned int ccs_poll(struct file *file, poll_table *wait)
++{
++ struct ccs_io_buffer *head = file->private_data;
++ if (head->type == CCS_AUDIT) {
++ if (!ccs_memory_used[CCS_MEMORY_AUDIT]) {
++ poll_wait(file, &ccs_log_wait, wait);
++ if (!ccs_memory_used[CCS_MEMORY_AUDIT])
++ return POLLOUT | POLLWRNORM;
++ }
++ } else if (head->type == CCS_QUERY) {
++ if (list_empty(&ccs_query_list)) {
++ poll_wait(file, &ccs_query_wait, wait);
++ if (list_empty(&ccs_query_list))
++ return POLLOUT | POLLWRNORM;
++ }
++ }
++ return POLLIN | POLLRDNORM | POLLOUT | POLLWRNORM;
++}
++
++/**
++ * ccs_read - read() for /proc/ccs/ interface.
++ *
++ * @file: Pointer to "struct file".
++ * @buf: Pointer to buffer.
++ * @count: Size of @buf.
++ * @ppos: Unused.
++ *
++ * Returns bytes read on success, negative value otherwise.
++ */
++static ssize_t ccs_read(struct file *file, char __user *buf, size_t count,
++ loff_t *ppos)
++{
++ struct ccs_io_buffer *head = file->private_data;
++ int len;
++ int idx;
++ if (mutex_lock_interruptible(&head->io_sem))
++ return -EINTR;
++ head->read_user_buf = buf;
++ head->read_user_buf_avail = count;
++ idx = ccs_read_lock();
++ if (ccs_flush(head))
++ /* Call the policy handler. */
++ do {
++ ccs_set_namespace_cursor(head);
++ switch (head->type) {
++ case CCS_DOMAIN_POLICY:
++ ccs_read_domain(head);
++ break;
++ case CCS_EXCEPTION_POLICY:
++ ccs_read_exception(head);
++ break;
++ case CCS_AUDIT:
++ ccs_read_log(head);
++ break;
++#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
++ case CCS_EXECUTE_HANDLER:
++#endif
++ case CCS_PROCESS_STATUS:
++ ccs_read_pid(head);
++ break;
++ case CCS_VERSION:
++ ccs_read_version(head);
++ break;
++ case CCS_STAT:
++ ccs_read_stat(head);
++ break;
++ case CCS_PROFILE:
++ ccs_read_profile(head);
++ break;
++ case CCS_QUERY:
++ ccs_read_query(head);
++ break;
++ case CCS_MANAGER:
++ ccs_read_manager(head);
++ break;
++ }
++ } while (ccs_flush(head) && ccs_has_more_namespace(head));
++ ccs_read_unlock(idx);
++ len = head->read_user_buf - buf;
++ mutex_unlock(&head->io_sem);
++ return len;
++}
++
++#ifdef CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION
++
++/**
++ * ccs_write_self - write() for /proc/ccs/self_domain interface.
++ *
++ * @file: Pointer to "struct file".
++ * @buf: Domainname to transit to.
++ * @count: Size of @buf.
++ * @ppos: Unused.
++ *
++ * Returns @count on success, negative value otherwise.
++ *
++ * If domain transition was permitted but the domain transition failed, this
++ * function returns error rather than terminating current thread with SIGKILL.
++ */
++static ssize_t ccs_write_self(struct file *file, const char __user *buf,
++ size_t count, loff_t *ppos)
++{
++ char *data;
++ int error;
++ if (!count || count >= CCS_EXEC_TMPSIZE - 10)
++ return -ENOMEM;
++ data = kzalloc(count + 1, CCS_GFP_FLAGS);
++ if (!data)
++ return -ENOMEM;
++ if (copy_from_user(data, buf, count)) {
++ error = -EFAULT;
++ goto out;
++ }
++ ccs_normalize_line(data);
++ if (ccs_correct_domain(data)) {
++ const int idx = ccs_read_lock();
++ struct ccs_path_info name;
++ struct ccs_request_info r;
++ name.name = data;
++ ccs_fill_path_info(&name);
++ /* Check "task manual_domain_transition" permission. */
++ ccs_init_request_info(&r, CCS_MAC_FILE_EXECUTE);
++ r.param_type = CCS_TYPE_MANUAL_TASK_ACL;
++ r.param.task.domainname = &name;
++ ccs_check_acl(&r);
++ if (!r.granted)
++ error = -EPERM;
++ else
++ error = ccs_assign_domain(data, true) ? 0 : -ENOENT;
++ ccs_read_unlock(idx);
++ } else
++ error = -EINVAL;
++out:
++ kfree(data);
++ return error ? error : count;
++}
++
++#endif
++
++/**
++ * ccs_write - write() for /proc/ccs/ interface.
++ *
++ * @file: Pointer to "struct file".
++ * @buf: Pointer to buffer.
++ * @count: Size of @buf.
++ * @ppos: Unused.
++ *
++ * Returns @count on success, negative value otherwise.
++ */
++static ssize_t ccs_write(struct file *file, const char __user *buf,
++ size_t count, loff_t *ppos)
++{
++ struct ccs_io_buffer *head = file->private_data;
++ int error = count;
++ char *cp0 = head->write_buf;
++ int idx;
++ if (mutex_lock_interruptible(&head->io_sem))
++ return -EINTR;
++ head->read_user_buf_avail = 0;
++ idx = ccs_read_lock();
++ /* Read a line and dispatch it to the policy handler. */
++ while (count) {
++ char c;
++ if (head->w.avail >= head->writebuf_size - 1) {
++ const int len = head->writebuf_size * 2;
++ char *cp = kzalloc(len, CCS_GFP_FLAGS);
++ if (!cp) {
++ error = -ENOMEM;
++ break;
++ }
++ memmove(cp, cp0, head->w.avail);
++ kfree(cp0);
++ head->write_buf = cp;
++ cp0 = cp;
++ head->writebuf_size = len;
++ }
++ if (get_user(c, buf)) {
++ error = -EFAULT;
++ break;
++ }
++ buf++;
++ count--;
++ cp0[head->w.avail++] = c;
++ if (c != '\n')
++ continue;
++ cp0[head->w.avail - 1] = '\0';
++ head->w.avail = 0;
++ ccs_normalize_line(cp0);
++ if (!strcmp(cp0, "reset")) {
++ head->w.ns = &ccs_kernel_namespace;
++ head->w.domain = NULL;
++ memset(&head->r, 0, sizeof(head->r));
++ continue;
++ }
++ /* Don't allow updating policies by non manager programs. */
++ switch (head->type) {
++ case CCS_PROCESS_STATUS:
++ /* This does not write anything. */
++ break;
++ case CCS_DOMAIN_POLICY:
++ if (ccs_select_domain(head, cp0))
++ continue;
++ /* fall through */
++ case CCS_EXCEPTION_POLICY:
++ if (!strcmp(cp0, "select transition_only")) {
++ head->r.print_transition_related_only = true;
++ continue;
++ }
++ /* fall through */
++ default:
++ if (!ccs_manager()) {
++ error = -EPERM;
++ goto out;
++ }
++ }
++ switch (ccs_parse_policy(head, cp0)) {
++ case -EPERM:
++ error = -EPERM;
++ goto out;
++ case 0:
++ /* Update statistics. */
++ switch (head->type) {
++ case CCS_DOMAIN_POLICY:
++ case CCS_EXCEPTION_POLICY:
++ case CCS_STAT:
++ case CCS_PROFILE:
++ case CCS_MANAGER:
++ ccs_update_stat(CCS_STAT_POLICY_UPDATES);
++ break;
++ default:
++ break;
++ }
++ break;
++ }
++ }
++out:
++ ccs_read_unlock(idx);
++ mutex_unlock(&head->io_sem);
++ return error;
++}
++
++/**
++ * ccs_create_entry - Create interface files under /proc/ccs/ directory.
++ *
++ * @name: The name of the interface file.
++ * @mode: The permission of the interface file.
++ * @parent: The parent directory.
++ * @key: Type of interface.
++ *
++ * Returns nothing.
++ */
++static void __init ccs_create_entry(const char *name, const umode_t mode,
++ struct proc_dir_entry *parent,
++ const u8 key)
++{
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
++ proc_create_data(name, mode, parent, &ccs_operations,
++ ((u8 *) NULL) + key);
++#else
++ struct proc_dir_entry *entry = create_proc_entry(name, mode, parent);
++ if (entry) {
++ entry->proc_fops = &ccs_operations;
++ entry->data = ((u8 *) NULL) + key;
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
++ if (entry->proc_iops)
++ ccs_file_inode_operations = *entry->proc_iops;
++ if (!ccs_file_inode_operations.setattr)
++ ccs_file_inode_operations.setattr = proc_notify_change;
++ entry->proc_iops = &ccs_file_inode_operations;
++#endif
++ }
++#endif
++}
++
++/**
++ * ccs_proc_init - Initialize /proc/ccs/ interface.
++ *
++ * Returns nothing.
++ */
++static void __init ccs_proc_init(void)
++{
++ struct proc_dir_entry *ccs_dir = proc_mkdir("ccs", NULL);
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
++ if (ccs_dir->proc_iops)
++ ccs_dir_inode_operations = *ccs_dir->proc_iops;
++ if (!ccs_dir_inode_operations.setattr)
++ ccs_dir_inode_operations.setattr = proc_notify_change;
++ ccs_dir->proc_iops = &ccs_dir_inode_operations;
++#endif
++ ccs_create_entry("query", 0600, ccs_dir, CCS_QUERY);
++ ccs_create_entry("domain_policy", 0600, ccs_dir, CCS_DOMAIN_POLICY);
++ ccs_create_entry("exception_policy", 0600, ccs_dir,
++ CCS_EXCEPTION_POLICY);
++ ccs_create_entry("audit", 0400, ccs_dir, CCS_AUDIT);
++ ccs_create_entry(".process_status", 0600, ccs_dir,
++ CCS_PROCESS_STATUS);
++ ccs_create_entry("stat", 0644, ccs_dir, CCS_STAT);
++ ccs_create_entry("profile", 0600, ccs_dir, CCS_PROFILE);
++ ccs_create_entry("manager", 0600, ccs_dir, CCS_MANAGER);
++ ccs_create_entry("version", 0400, ccs_dir, CCS_VERSION);
++#ifdef CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER
++ ccs_create_entry(".execute_handler", 0666, ccs_dir,
++ CCS_EXECUTE_HANDLER);
++#endif
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
++ proc_create("self_domain", 0666, ccs_dir, &ccs_self_operations);
++#else
++ {
++ struct proc_dir_entry *e = create_proc_entry("self_domain",
++ 0666, ccs_dir);
++ if (e)
++ e->proc_fops = &ccs_self_operations;
++ }
++#endif
++}
++
++/**
++ * ccs_init_module - Initialize this module.
++ *
++ * Returns 0 on success, negative value otherwise.
++ */
++static int __init ccs_init_module(void)
++{
++ if (ccsecurity_ops.disabled)
++ return -EINVAL;
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0)
++ MOD_INC_USE_COUNT;
++#endif
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19)
++ if (init_srcu_struct(&ccs_ss))
++ panic("Out of memory.");
++#endif
++ ccs_kernel_namespace.name = "<kernel>";
++ ccs_init_policy_namespace(&ccs_kernel_namespace);
++ ccs_kernel_domain.ns = &ccs_kernel_namespace;
++ INIT_LIST_HEAD(&ccs_kernel_domain.acl_info_list);
++ ccs_mm_init();
++ ccs_policy_io_init();
++ ccs_permission_init();
++ ccs_proc_init();
++ ccs_load_builtin_policy();
++ return 0;
++}
++
++MODULE_LICENSE("GPL");
++module_init(ccs_init_module);
+diff --git a/security/ccsecurity/realpath.c b/security/ccsecurity/realpath.c
+new file mode 100644
+index 0000000..df821ed
+--- /dev/null
++++ b/security/ccsecurity/realpath.c
+@@ -0,0 +1,767 @@
++/*
++ * security/ccsecurity/realpath.c
++ *
++ * Copyright (C) 2005-2012 NTT DATA CORPORATION
++ *
++ * Version: 1.8.4 2015/05/05
++ */
++
++#include "internal.h"
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36) && LINUX_VERSION_CODE < KERNEL_VERSION(3, 2, 0)
++#include <linux/nsproxy.h>
++#include <linux/mnt_namespace.h>
++#endif
++
++/***** SECTION1: Constants definition *****/
++
++#define SOCKFS_MAGIC 0x534F434B
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
++#define s_fs_info u.generic_sbp
++#endif
++
++/***** SECTION2: Structure definition *****/
++
++/***** SECTION3: Prototype definition section *****/
++
++char *ccs_encode(const char *str);
++char *ccs_encode2(const char *str, int str_len);
++char *ccs_realpath(const struct path *path);
++const char *ccs_get_exe(void);
++void ccs_fill_path_info(struct ccs_path_info *ptr);
++
++static char *ccs_get_absolute_path(const struct path *path,
++ char * const buffer, const int buflen);
++static char *ccs_get_dentry_path(struct dentry *dentry, char * const buffer,
++ const int buflen);
++static char *ccs_get_local_path(struct dentry *dentry, char * const buffer,
++ const int buflen);
++static char *ccs_get_socket_name(const struct path *path, char * const buffer,
++ const int buflen);
++static int ccs_const_part_length(const char *filename);
++
++/***** SECTION4: Standalone functions section *****/
++
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)
++
++/**
++ * SOCKET_I - Get "struct socket".
++ *
++ * @inode: Pointer to "struct inode".
++ *
++ * Returns pointer to "struct socket".
++ *
++ * This is for compatibility with older kernels.
++ */
++static inline struct socket *SOCKET_I(struct inode *inode)
++{
++ return inode->i_sock ? &inode->u.socket_i : NULL;
++}
++
++#endif
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 37)
++
++/**
++ * ccs_realpath_lock - Take locks for __d_path().
++ *
++ * Returns nothing.
++ */
++static inline void ccs_realpath_lock(void)
++{
++ /* dcache_lock is locked by __d_path(). */
++ /* vfsmount_lock is locked by __d_path(). */
++}
++
++/**
++ * ccs_realpath_unlock - Release locks for __d_path().
++ *
++ * Returns nothing.
++ */
++static inline void ccs_realpath_unlock(void)
++{
++ /* vfsmount_lock is unlocked by __d_path(). */
++ /* dcache_lock is unlocked by __d_path(). */
++}
++
++#elif LINUX_VERSION_CODE == KERNEL_VERSION(2, 6, 36)
++
++/**
++ * ccs_realpath_lock - Take locks for __d_path().
++ *
++ * Returns nothing.
++ */
++static inline void ccs_realpath_lock(void)
++{
++ spin_lock(&dcache_lock);
++ /* vfsmount_lock is locked by __d_path(). */
++}
++
++/**
++ * ccs_realpath_unlock - Release locks for __d_path().
++ *
++ * Returns nothing.
++ */
++static inline void ccs_realpath_unlock(void)
++{
++ /* vfsmount_lock is unlocked by __d_path(). */
++ spin_unlock(&dcache_lock);
++}
++
++#elif defined(D_PATH_DISCONNECT) && !defined(CONFIG_SUSE_KERNEL)
++
++/**
++ * ccs_realpath_lock - Take locks for __d_path().
++ *
++ * Returns nothing.
++ *
++ * Original unambiguous-__d_path.diff in patches.apparmor.tar.bz2 inversed the
++ * order of holding dcache_lock and vfsmount_lock. That patch was applied on
++ * (at least) SUSE 11.1 and Ubuntu 8.10 and Ubuntu 9.04 kernels.
++ *
++ * However, that patch was updated to use original order and the updated patch
++ * is applied to (as far as I know) only SUSE kernels.
++ *
++ * Therefore, I need to use original order for SUSE 11.1 kernels and inversed
++ * order for other kernels. I detect it by checking D_PATH_DISCONNECT and
++ * CONFIG_SUSE_KERNEL. I don't know whether other distributions are using the
++ * updated patch or not. If you got deadlock, check fs/dcache.c for locking
++ * order, and add " && 0" to this "#elif " block if fs/dcache.c uses original
++ * order.
++ */
++static inline void ccs_realpath_lock(void)
++{
++ spin_lock(ccsecurity_exports.vfsmount_lock);
++ spin_lock(&dcache_lock);
++}
++
++/**
++ * ccs_realpath_unlock - Release locks for __d_path().
++ *
++ * Returns nothing.
++ */
++static inline void ccs_realpath_unlock(void)
++{
++ spin_unlock(&dcache_lock);
++ spin_unlock(ccsecurity_exports.vfsmount_lock);
++}
++
++#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0)
++
++/**
++ * ccs_realpath_lock - Take locks for __d_path().
++ *
++ * Returns nothing.
++ */
++static inline void ccs_realpath_lock(void)
++{
++ spin_lock(&dcache_lock);
++ spin_lock(ccsecurity_exports.vfsmount_lock);
++}
++
++/**
++ * ccs_realpath_unlock - Release locks for __d_path().
++ *
++ * Returns nothing.
++ */
++static inline void ccs_realpath_unlock(void)
++{
++ spin_unlock(ccsecurity_exports.vfsmount_lock);
++ spin_unlock(&dcache_lock);
++}
++
++#else
++
++/**
++ * ccs_realpath_lock - Take locks for __d_path().
++ *
++ * Returns nothing.
++ */
++static inline void ccs_realpath_lock(void)
++{
++ spin_lock(&dcache_lock);
++}
++
++/**
++ * ccs_realpath_unlock - Release locks for __d_path().
++ *
++ * Returns nothing.
++ */
++static inline void ccs_realpath_unlock(void)
++{
++ spin_unlock(&dcache_lock);
++}
++
++#endif
++
++/***** SECTION5: Variables definition section *****/
++
++/***** SECTION6: Dependent functions section *****/
++
++/**
++ * ccs_get_absolute_path - Get the path of a dentry but ignores chroot'ed root.
++ *
++ * @path: Pointer to "struct path".
++ * @buffer: Pointer to buffer to return value in.
++ * @buflen: Sizeof @buffer.
++ *
++ * Returns the buffer on success, an error code otherwise.
++ *
++ * Caller holds the dcache_lock and vfsmount_lock.
++ * Based on __d_path() in fs/dcache.c
++ *
++ * If dentry is a directory, trailing '/' is appended.
++ */
++static char *ccs_get_absolute_path(const struct path *path,
++ char * const buffer, const int buflen)
++{
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 2, 0)
++ char *pos = ERR_PTR(-ENOMEM);
++ if (buflen >= 256) {
++ pos = ccsecurity_exports.d_absolute_path(path, buffer,
++ buflen - 1);
++ if (!IS_ERR(pos) && *pos == '/' && pos[1]) {
++ struct inode *inode = path->dentry->d_inode;
++ if (inode && S_ISDIR(inode->i_mode)) {
++ buffer[buflen - 2] = '/';
++ buffer[buflen - 1] = '\0';
++ }
++ }
++ }
++ return pos;
++#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 36)
++ /*
++ * __d_path() will start returning NULL by backporting commit 02125a82
++ * "fix apparmor dereferencing potentially freed dentry, sanitize
++ * __d_path() API".
++ *
++ * Unfortunately, __d_path() after applying that commit always returns
++ * NULL when root is empty. d_absolute_path() is provided for TOMOYO
++ * 2.x and AppArmor but TOMOYO 1.x does not use it, for TOMOYO 1.x
++ * might be built as a loadable kernel module and there is no warrantee
++ * that TOMOYO 1.x is recompiled after applying that commit. Also,
++ * I don't want to search /proc/kallsyms for d_absolute_path() because
++ * I want to keep TOMOYO 1.x architecture independent. Thus, supply
++ * non empty root like AppArmor's d_namespace_path() did.
++ */
++ char *pos = ERR_PTR(-ENOMEM);
++ if (buflen >= 256) {
++ static bool ccs_no_empty;
++ if (!ccs_no_empty) {
++ struct path root = { };
++ pos = ccsecurity_exports.__d_path(path, &root, buffer,
++ buflen - 1);
++ } else {
++ pos = NULL;
++ }
++ if (!pos) {
++ struct task_struct *task = current;
++ struct path root;
++ struct path tmp;
++ spin_lock(&task->fs->lock);
++ root.mnt = task->nsproxy->mnt_ns->root;
++ root.dentry = root.mnt->mnt_root;
++ path_get(&root);
++ spin_unlock(&task->fs->lock);
++ tmp = root;
++ pos = ccsecurity_exports.__d_path(path, &tmp, buffer,
++ buflen - 1);
++ path_put(&root);
++ if (!pos)
++ return ERR_PTR(-EINVAL);
++ /* Remember if __d_path() needs non empty root. */
++ ccs_no_empty = true;
++ }
++ if (!IS_ERR(pos) && *pos == '/' && pos[1]) {
++ struct inode *inode = path->dentry->d_inode;
++ if (inode && S_ISDIR(inode->i_mode)) {
++ buffer[buflen - 2] = '/';
++ buffer[buflen - 1] = '\0';
++ }
++ }
++ }
++ return pos;
++#else
++ char *pos = buffer + buflen - 1;
++ struct dentry *dentry = path->dentry;
++ struct vfsmount *vfsmnt = path->mnt;
++ const char *name;
++ int len;
++
++ if (buflen < 256)
++ goto out;
++
++ *pos = '\0';
++ if (dentry->d_inode && S_ISDIR(dentry->d_inode->i_mode))
++ *--pos = '/';
++ for (;;) {
++ struct dentry *parent;
++ if (dentry == vfsmnt->mnt_root || IS_ROOT(dentry)) {
++ if (vfsmnt->mnt_parent == vfsmnt)
++ break;
++ dentry = vfsmnt->mnt_mountpoint;
++ vfsmnt = vfsmnt->mnt_parent;
++ continue;
++ }
++ parent = dentry->d_parent;
++ name = dentry->d_name.name;
++ len = dentry->d_name.len;
++ pos -= len;
++ if (pos <= buffer)
++ goto out;
++ memmove(pos, name, len);
++ *--pos = '/';
++ dentry = parent;
++ }
++ if (*pos == '/')
++ pos++;
++ len = dentry->d_name.len;
++ pos -= len;
++ if (pos < buffer)
++ goto out;
++ memmove(pos, dentry->d_name.name, len);
++ return pos;
++out:
++ return ERR_PTR(-ENOMEM);
++#endif
++}
++
++/**
++ * ccs_get_dentry_path - Get the path of a dentry.
++ *
++ * @dentry: Pointer to "struct dentry".
++ * @buffer: Pointer to buffer to return value in.
++ * @buflen: Sizeof @buffer.
++ *
++ * Returns the buffer on success, an error code otherwise.
++ *
++ * Based on dentry_path() in fs/dcache.c
++ *
++ * If dentry is a directory, trailing '/' is appended.
++ */
++static char *ccs_get_dentry_path(struct dentry *dentry, char * const buffer,
++ const int buflen)
++{
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 0)
++ char *pos = ERR_PTR(-ENOMEM);
++ if (buflen >= 256) {
++ pos = dentry_path_raw(dentry, buffer, buflen - 1);
++ if (!IS_ERR(pos) && *pos == '/' && pos[1] &&
++ d_is_dir(dentry)) {
++ buffer[buflen - 2] = '/';
++ buffer[buflen - 1] = '\0';
++ }
++ }
++ return pos;
++#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 38)
++ char *pos = ERR_PTR(-ENOMEM);
++ if (buflen >= 256) {
++ /* rename_lock is locked/unlocked by dentry_path_raw(). */
++ pos = dentry_path_raw(dentry, buffer, buflen - 1);
++ if (!IS_ERR(pos) && *pos == '/' && pos[1]) {
++ struct inode *inode = dentry->d_inode;
++ if (inode && S_ISDIR(inode->i_mode)) {
++ buffer[buflen - 2] = '/';
++ buffer[buflen - 1] = '\0';
++ }
++ }
++ }
++ return pos;
++#else
++ char *pos = buffer + buflen - 1;
++ if (buflen < 256)
++ return ERR_PTR(-ENOMEM);
++ *pos = '\0';
++ if (dentry->d_inode && S_ISDIR(dentry->d_inode->i_mode))
++ *--pos = '/';
++ spin_lock(&dcache_lock);
++ while (!IS_ROOT(dentry)) {
++ struct dentry *parent = dentry->d_parent;
++ const char *name = dentry->d_name.name;
++ const int len = dentry->d_name.len;
++ pos -= len;
++ if (pos <= buffer) {
++ pos = ERR_PTR(-ENOMEM);
++ break;
++ }
++ memmove(pos, name, len);
++ *--pos = '/';
++ dentry = parent;
++ }
++ spin_unlock(&dcache_lock);
++ return pos;
++#endif
++}
++
++/**
++ * ccs_get_local_path - Get the path of a dentry.
++ *
++ * @dentry: Pointer to "struct dentry".
++ * @buffer: Pointer to buffer to return value in.
++ * @buflen: Sizeof @buffer.
++ *
++ * Returns the buffer on success, an error code otherwise.
++ */
++static char *ccs_get_local_path(struct dentry *dentry, char * const buffer,
++ const int buflen)
++{
++ struct super_block *sb = dentry->d_sb;
++ char *pos = ccs_get_dentry_path(dentry, buffer, buflen);
++ if (IS_ERR(pos))
++ return pos;
++ /* Convert from $PID to self if $PID is current thread. */
++ if (sb->s_magic == PROC_SUPER_MAGIC && *pos == '/') {
++ char *ep;
++ const pid_t pid = (pid_t) simple_strtoul(pos + 1, &ep, 10);
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
++ if (*ep == '/' && pid && pid ==
++ task_tgid_nr_ns(current, sb->s_fs_info)) {
++ pos = ep - 5;
++ if (pos < buffer)
++ goto out;
++ memmove(pos, "/self", 5);
++ }
++#else
++ if (*ep == '/' && pid == ccs_sys_getpid()) {
++ pos = ep - 5;
++ if (pos < buffer)
++ goto out;
++ memmove(pos, "/self", 5);
++ }
++#endif
++ goto prepend_filesystem_name;
++ }
++ /* Use filesystem name for unnamed devices. */
++ if (!MAJOR(sb->s_dev))
++ goto prepend_filesystem_name;
++ {
++ struct inode *inode = sb->s_root->d_inode;
++ /*
++ * Use filesystem name if filesystems does not support rename()
++ * operation.
++ */
++#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0)
++ if (inode->i_op && !inode->i_op->rename)
++ goto prepend_filesystem_name;
++#else
++ if (!inode->i_op->rename && !inode->i_op->rename2)
++ goto prepend_filesystem_name;
++#endif
++ }
++ /* Prepend device name. */
++ {
++ char name[64];
++ int name_len;
++ const dev_t dev = sb->s_dev;
++ name[sizeof(name) - 1] = '\0';
++ snprintf(name, sizeof(name) - 1, "dev(%u,%u):", MAJOR(dev),
++ MINOR(dev));
++ name_len = strlen(name);
++ pos -= name_len;
++ if (pos < buffer)
++ goto out;
++ memmove(pos, name, name_len);
++ return pos;
++ }
++ /* Prepend filesystem name. */
++prepend_filesystem_name:
++ {
++ const char *name = sb->s_type->name;
++ const int name_len = strlen(name);
++ pos -= name_len + 1;
++ if (pos < buffer)
++ goto out;
++ memmove(pos, name, name_len);
++ pos[name_len] = ':';
++ }
++ return pos;
++out:
++ return ERR_PTR(-ENOMEM);
++}
++
++/**
++ * ccs_get_socket_name - Get the name of a socket.
++ *
++ * @path: Pointer to "struct path".
++ * @buffer: Pointer to buffer to return value in.
++ * @buflen: Sizeof @buffer.
++ *
++ * Returns the buffer.
++ */
++static char *ccs_get_socket_name(const struct path *path, char * const buffer,
++ const int buflen)
++{
++ struct inode *inode = path->dentry->d_inode;
++ struct socket *sock = inode ? SOCKET_I(inode) : NULL;
++ struct sock *sk = sock ? sock->sk : NULL;
++ if (sk) {
++ snprintf(buffer, buflen, "socket:[family=%u:type=%u:"
++ "protocol=%u]", sk->sk_family, sk->sk_type,
++ sk->sk_protocol);
++ } else {
++ snprintf(buffer, buflen, "socket:[unknown]");
++ }
++ return buffer;
++}
++
++#define SOCKFS_MAGIC 0x534F434B
++
++/**
++ * ccs_realpath - Returns realpath(3) of the given pathname but ignores chroot'ed root.
++ *
++ * @path: Pointer to "struct path".
++ *
++ * Returns the realpath of the given @path on success, NULL otherwise.
++ *
++ * This function uses kzalloc(), so caller must kfree() if this function
++ * didn't return NULL.
++ */
++char *ccs_realpath(const struct path *path)
++{
++ char *buf = NULL;
++ char *name = NULL;
++ unsigned int buf_len = PAGE_SIZE / 2;
++ struct dentry *dentry = path->dentry;
++ struct super_block *sb;
++ if (!dentry)
++ return NULL;
++ sb = dentry->d_sb;
++ while (1) {
++ char *pos;
++ struct inode *inode;
++ buf_len <<= 1;
++ kfree(buf);
++ buf = kmalloc(buf_len, CCS_GFP_FLAGS);
++ if (!buf)
++ break;
++ /* To make sure that pos is '\0' terminated. */
++ buf[buf_len - 1] = '\0';
++ /* Get better name for socket. */
++ if (sb->s_magic == SOCKFS_MAGIC) {
++ pos = ccs_get_socket_name(path, buf, buf_len - 1);
++ goto encode;
++ }
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 22)
++ /* For "pipe:[\$]". */
++ if (dentry->d_op && dentry->d_op->d_dname) {
++ pos = dentry->d_op->d_dname(dentry, buf, buf_len - 1);
++ goto encode;
++ }
++#endif
++ inode = sb->s_root->d_inode;
++ /*
++ * Use local name for "filesystems without rename() operation"
++ * or "path without vfsmount" or "absolute name is unavailable"
++ * cases.
++ */
++#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 17, 0)
++ if (!path->mnt || (inode->i_op && !inode->i_op->rename))
++ pos = ERR_PTR(-EINVAL);
++ else {
++ /* Get absolute name for the rest. */
++ ccs_realpath_lock();
++ pos = ccs_get_absolute_path(path, buf, buf_len - 1);
++ ccs_realpath_unlock();
++ }
++ if (pos == ERR_PTR(-EINVAL))
++ pos = ccs_get_local_path(path->dentry, buf,
++ buf_len - 1);
++#else
++ if (!path->mnt ||
++ (!inode->i_op->rename && !inode->i_op->rename2))
++ pos = ccs_get_local_path(path->dentry, buf,
++ buf_len - 1);
++ else
++ pos = ccs_get_absolute_path(path, buf, buf_len - 1);
++#endif
++encode:
++ if (IS_ERR(pos))
++ continue;
++ name = ccs_encode(pos);
++ break;
++ }
++ kfree(buf);
++ if (!name)
++ ccs_warn_oom(__func__);
++ return name;
++}
++
++/**
++ * ccs_encode2 - Encode binary string to ascii string.
++ *
++ * @str: String in binary format.
++ * @str_len: Size of @str in byte.
++ *
++ * Returns pointer to @str in ascii format on success, NULL otherwise.
++ *
++ * This function uses kzalloc(), so caller must kfree() if this function
++ * didn't return NULL.
++ */
++char *ccs_encode2(const char *str, int str_len)
++{
++ int i;
++ int len = 0;
++ const char *p = str;
++ char *cp;
++ char *cp0;
++ if (!p)
++ return NULL;
++ for (i = 0; i < str_len; i++) {
++ const unsigned char c = p[i];
++ if (c == '\\')
++ len += 2;
++ else if (c > ' ' && c < 127)
++ len++;
++ else
++ len += 4;
++ }
++ len++;
++ /* Reserve space for appending "/". */
++ cp = kzalloc(len + 10, CCS_GFP_FLAGS);
++ if (!cp)
++ return NULL;
++ cp0 = cp;
++ p = str;
++ for (i = 0; i < str_len; i++) {
++ const unsigned char c = p[i];
++ if (c == '\\') {
++ *cp++ = '\\';
++ *cp++ = '\\';
++ } else if (c > ' ' && c < 127) {
++ *cp++ = c;
++ } else {
++ *cp++ = '\\';
++ *cp++ = (c >> 6) + '0';
++ *cp++ = ((c >> 3) & 7) + '0';
++ *cp++ = (c & 7) + '0';
++ }
++ }
++ return cp0;
++}
++
++/**
++ * ccs_encode - Encode binary string to ascii string.
++ *
++ * @str: String in binary format.
++ *
++ * Returns pointer to @str in ascii format on success, NULL otherwise.
++ *
++ * This function uses kzalloc(), so caller must kfree() if this function
++ * didn't return NULL.
++ */
++char *ccs_encode(const char *str)
++{
++ return str ? ccs_encode2(str, strlen(str)) : NULL;
++}
++
++/**
++ * ccs_const_part_length - Evaluate the initial length without a pattern in a token.
++ *
++ * @filename: The string to evaluate.
++ *
++ * Returns the initial length without a pattern in @filename.
++ */
++static int ccs_const_part_length(const char *filename)
++{
++ char c;
++ int len = 0;
++ if (!filename)
++ return 0;
++ while (1) {
++ c = *filename++;
++ if (!c)
++ break;
++ if (c != '\\') {
++ len++;
++ continue;
++ }
++ c = *filename++;
++ switch (c) {
++ case '\\': /* "\\" */
++ len += 2;
++ continue;
++ case '0': /* "\ooo" */
++ case '1':
++ case '2':
++ case '3':
++ c = *filename++;
++ if (c < '0' || c > '7')
++ break;
++ c = *filename++;
++ if (c < '0' || c > '7')
++ break;
++ len += 4;
++ continue;
++ }
++ break;
++ }
++ return len;
++}
++
++/**
++ * ccs_fill_path_info - Fill in "struct ccs_path_info" members.
++ *
++ * @ptr: Pointer to "struct ccs_path_info" to fill in.
++ *
++ * The caller sets "struct ccs_path_info"->name.
++ */
++void ccs_fill_path_info(struct ccs_path_info *ptr)
++{
++ const char *name = ptr->name;
++ const int len = strlen(name);
++ ptr->total_len = len;
++ ptr->const_len = ccs_const_part_length(name);
++ ptr->is_dir = len && (name[len - 1] == '/');
++ ptr->is_patterned = (ptr->const_len < len);
++ ptr->hash = full_name_hash(name, len);
++}
++
++/**
++ * ccs_get_exe - Get ccs_realpath() of current process.
++ *
++ * Returns the ccs_realpath() of current process on success, NULL otherwise.
++ *
++ * This function uses kzalloc(), so the caller must kfree()
++ * if this function didn't return NULL.
++ */
++const char *ccs_get_exe(void)
++{
++ struct mm_struct *mm = current->mm;
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26)
++ struct vm_area_struct *vma;
++#endif
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
++ struct path path;
++#endif
++ struct file *exe_file = NULL;
++ const char *cp;
++ if (!mm)
++ return NULL;
++ down_read(&mm->mmap_sem);
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
++ /* Not using get_mm_exe_file() as it is not exported. */
++ exe_file = mm->exe_file;
++#else
++ for (vma = mm->mmap; vma; vma = vma->vm_next) {
++ if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file) {
++ exe_file = vma->vm_file;
++ break;
++ }
++ }
++#endif
++ if (exe_file)
++ get_file(exe_file);
++ up_read(&mm->mmap_sem);
++ if (!exe_file)
++ return NULL;
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 20)
++ cp = ccs_realpath(&exe_file->f_path);
++#else
++ path.mnt = exe_file->f_vfsmnt;
++ path.dentry = exe_file->f_dentry;
++ cp = ccs_realpath(&path);
++#endif
++ fput(exe_file);
++ return cp;
++}
+--
+1.9.1
+
diff --git a/recipes-kernel/linux/linux-yocto-4.1/tomoyo.cfg b/recipes-kernel/linux/linux-yocto-4.1/tomoyo.cfg
new file mode 100644
index 0000000..8f78270
--- /dev/null
+++ b/recipes-kernel/linux/linux-yocto-4.1/tomoyo.cfg
@@ -0,0 +1,16 @@
+CONFIG_CCSECURITY=y
+CONFIG_CCSECURITY_USE_EXTERNAL_TASK_SECURITY=y
+CONFIG_CCSECURITY_MAX_ACCEPT_ENTRY=2048
+CONFIG_CCSECURITY_MAX_AUDIT_LOG=1024
+CONFIG_CCSECURITY_POLICY_LOADER="/sbin/ccs-init"
+CONFIG_CCSECURITY_ACTIVATION_TRIGGER="/sbin/init"
+CONFIG_CCSECURITY_FILE_READDIR=y
+CONFIG_CCSECURITY_FILE_GETATTR=y
+CONFIG_CCSECURITY_NETWORK=y
+CONFIG_CCSECURITY_NETWORK_RECVMSG=y
+CONFIG_CCSECURITY_CAPABILITY=y
+CONFIG_CCSECURITY_IPC=y
+CONFIG_CCSECURITY_MISC=y
+CONFIG_CCSECURITY_TASK_EXECUTE_HANDLER=y
+CONFIG_CCSECURITY_TASK_DOMAIN_TRANSITION=y
+CONFIG_CCSECURITY_PORTRESERVE=y
diff --git a/recipes-kernel/linux/linux-yocto-4.1/tomoyo.scc b/recipes-kernel/linux/linux-yocto-4.1/tomoyo.scc
new file mode 100644
index 0000000..588864c
--- /dev/null
+++ b/recipes-kernel/linux/linux-yocto-4.1/tomoyo.scc
@@ -0,0 +1,4 @@
+define KFEATURE_DESCRIPTION "Tomoyo Kernel Support"
+define KFEATURE_COMPATIBILITY arch
+
+kconf non-hardware tomoyo.cfg
diff --git a/recipes-kernel/linux/linux-yocto_4.1.bbappend b/recipes-kernel/linux/linux-yocto_4.1.bbappend
new file mode 100644
index 0000000..1043d5c
--- /dev/null
+++ b/recipes-kernel/linux/linux-yocto_4.1.bbappend
@@ -0,0 +1,9 @@
+FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}-4.1:"
+
+# Tomoyo kernel support
+SRC_URI += "\
+ ${@base_contains('DISTRO_FEATURES', 'tomoyo', ' file://ccs-tools-yocto.4.1.patch', '', d)} \
+ ${@base_contains('DISTRO_FEATURES', 'tomoyo', ' file://ccs-tools-yocto_security.patch', '', d)} \
+ ${@base_contains('DISTRO_FEATURES', 'tomoyo', ' file://tomoyo.cfg', '', d)} \
+ ${@base_contains('DISTRO_FEATURES', 'tomoyo', ' file://tomoyo.scc', '', d)} \
+ "
--
1.9.1
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