[yocto] Kernel Crash when moving from Pyro to Rocko (or master): change in kernel compile process or flags?

Sun Jul 1 19:57:38 PDT 2018

Hi,

We too are experiencing this crash when attempting to upgrade from
Pyro to Rocko.

Has anyone been able to work out the cause, or can someone look into
it? I can supply any debug information needed (just let me know).

Regards,
Mathew

> Hi,
> I am experiencing a Kernel crash when moving my system from Yocto 2.3 (Pyro) to Rocko or Master.
> Target system is an ARMv7 (NXP Layerscape LS1021a, built on Cortex-A7).
> This is what I did:
> 1) switched poky version
> 2) re-built same image in a new, blank directory
> Results:
> Root-FS works fine, the kernel crashes with an undefined instruction oops.
> Just exchanging the kernel zImage with the one compiled with Pyro (same recipe), my system works fine again.
> What I tried so far:
> 1) checked and compared the kernel configs generated: 100% identical
> 2) switched gcc back to the version used in Pyro (6.3) instead of 7.2: kernel still crashes, same oops, no changes. So it's not related to GCC 7.2
> 3) checked on different boards: same issue for the same board type, but the switch to rocko worked fine for a system based on Cortex-A9.
> I am using separate tmp directories and am not sharing sstate. I always started builds in blank build directories.
> The error is reproducible (100%)
> It was also present with all of the various snapshots of the master branch I tried
> What I suspect: there are some changes in the ways that gcc is called from pyro to rocko. Maybe one of the switches, or features, etc
> Before deep-diving into the trial and error phase of reproducing the CFLAGS, etc:
> Is anyone experiencing the same issues?
> * What exactly has changed in the way the kernel build is called (methods, compile/link flags, etc) between pyro and rocko? *
> * Is there a way to (easily) disable some of the features to test which one causes the issue? *
> * Any suspicions about what could cause this? *
> Pls. find a log of the crash below, and an excerpt of my kernel recipe and machine configuration.
> Thanks in advance for your help,
> Best regards,
> Michael
> -------------
> VFS: Mounted root (ext4 filesystem) on device 179:1.
> devtmpfs: mounted
> Freeing unused kernel memory: 2048K
> Internal error: Oops - undefined instruction: 0 [#1] SMP THUMB2
> Modules linked in:
> CPU: 1 PID: 1 Comm: init Not tainted 4.14.2-avnet-nxp #2
> Hardware name: Freescale LS1021A
> task: bf0a0000 task.stack: bf09a000
> PC is at ret_fast_syscall+0x2/0x52
> LR is at SyS_brk+0x109/0x128
> pc : [<80205fc2>]    lr : [<802c513d>]    psr: 60000013
> sp : bf09bfa8  ip : 70c5387d  fp : 00001000
> r10: 00000000  r9 : bf09a000  r8 : 802061a4
> r7 : 0000002d  r6 : 76f71bac  r5 : 00010034  r4 : 00000009
> r3 : 000273c8  r2 : ffff0001  r1 : 00000000  r0 : 00028000
> Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
> Control: 70c5387d  Table: be7d1000  DAC: fffbfff3
> Process init (pid: 1, stack limit = 0xbf09a210)
> Stack: (0xbf09bfa8 to 0xbf09c000)
> bfa0:                   00000009 00010034 00000000 7ee86fea 00000000 00000001
> bfc0: 00000009 00010034 76f71bac 0000002d 00000000 00000001 00000001 00001000
> bfe0: 7ee86f14 7ee86e4c 76f87a58 76f88e88 60000010 00000000 00000000 00000000
> Code: 20012000 0000bd08 00000000 b6720000 (2008f8d9)
> ---[ end trace 7bab6dceda641aab ]---
> Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
> CPU0: stopping
> CPU: 0 PID: 0 Comm: swapper/0 Tainted: G      D         4.14.2-avnet-nxp #2
> Hardware name: Freescale LS1021A
> [<8020bbe9>] (unwind_backtrace) from [<80208e77>] (show_stack+0xb/0xc)
> [<80208e77>] (show_stack) from [<8066af19>] (dump_stack+0x69/0x78)
> [<8066af19>] (dump_stack) from [<8020b1d5>] (handle_IPI+0x261/0x274)
> [<8020b1d5>] (handle_IPI) from [<802012b1>] (gic_handle_irq+0x61/0x64)
> [<802012b1>] (gic_handle_irq) from [<8067d953>] (__irq_svc+0x53/0x7c)
> Exception stack(0x80e01f38 to 0x80e01f80)
> 1f20:                                                       00000000 000027d0
> 1f40: 3eb79000 80212641 ffffe000 80e03cd0 80e03c74 80e7f3ab 8096e480 80e03c40
> 1f60: 80e8ce00 80c42a30 01400000 80e01f88 80206a3d 80206a3e 40000033 ffffffff
> [<8067d953>] (__irq_svc) from [<80206a3e>] (arch_cpu_idle+0x22/0x24)
> [<80206a3e>] (arch_cpu_idle) from [<802405bf>] (do_idle+0x9f/0xe4)
> [<802405bf>] (do_idle) from [<802407bb>] (cpu_startup_entry+0x13/0x14)
> [<802407bb>] (cpu_startup_entry) from [<80c00a05>] (start_kernel+0x305/0x310)
> ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
> -----------------------
> Excerpt from linux_xxx.bb:
> ----
> DEPENDS_kernel-base   += "kernel-devicetree"
> LINUX_VERSION           = "4.14-stable"
> S = "${WORKDIR}/git"
> PR = "r1"
> SRCREV = "8292fd8d726105abc01dae26d0a2cddcf53d4e0f"
> PV     = "4.14.2"
> SRC_URI = " \
>     git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git;branch=master;protocol=git;nobranch=1 \
> "
> SRC_URI_append_ls1021a   = " file://defconfig "
> SRC_URI_append_ls1021a   = " file://pcie.cfg file://caam.cfg file://usb.cfg file://bt.cfg "
> ----
> Excerpt from machine.conf
> ---
> SOC_FAMILY = "ls1021a"
> TARGET_ARCH = "arm"
> DEFAULTTUNE = "cortexa7hf-neon-vfpv4"
> IMAGE_INSTALL_append = " kernel-modules kernel-devicetree kernel-image"
> KERNEL_IMAGETYPE = "zImage"
> KERNEL_EXTRA_ARGS += "LOADADDR=${UBOOT_ENTRYPOINT}"
> EXTRA_IMAGEDEPENDS += "virtual/bootloader"
> ----
>
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