[meta-freescale] Unable to handle kernel NULL pointer dereference at virtual address 0000008c

[David Chirgwin]

Hi Ashwin, 

If you'd like to raise this on the Blue Chip Technology support system I'll try to help you out. 

Regards, 

Dave C 
----- Original Message -----

> From: "Ashwin Kirpalani" <akcooper8 at gmail.com>
> To: meta-freescale at yoctoproject.org
> Sent: Sunday, 20 July, 2014 5:26:30 PM
> Subject: [meta-freescale] Unable to handle kernel NULL pointer
> dereference at virtual address 0000008c

> I have a RM3 i.mx6 board from BlueChipTechnology running 3.0.35
> kernel and I encounter kernel crashes after about 10 minutes of
> activity. Here is one example of a log. Could anyone please advise
> what this could be and how I would go about debugging a problem like
> this? I have JTAG access to the board.

> The crash happens every time after about 10 minutes. Is there some
> watchdog timer problem?

> Unable to handle kernel NULL pointer dereference at virtual address
> 0000008c
> pgd = d2074000
> [0000008c] *pgd=00000000
> Internal error: Oops: 5 [#1] PREEMPT SMP
> Modules linked in: [last unloaded: wl12xx_sdio]
> CPU: 2 Not tainted (3.0.35-gde33f0b-dirty #7)
> PC is at attach_task_by_pid+0x20/0x1e0
> LR is at hrtimer_try_to_cancel+0x9c/0x130
> pc : [<c00ce644>] lr : [<c00aedf8>] psr: 600b0013
> sp : d2657ee8 ip : c0a267d0 fp : 00000006
> r10: fc239343 r9 : 00000000 r8 : 00000000
> r7 : 670c4cf0 r6 : 00000000 r5 : 00000080 r4 : 670c4cf0
> r3 : 00000000 r2 : 00000000 r1 : a00b0013 r0 : ffffff92
> Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user
> Control: 10c53c7d Table: 2207404a DAC: 00000015

> PC: 0xc00ce5c4:
> e5c4 eaffffcb e3a03000 e1a08000 e58d3004 eafffef9 e1a0c004 e59d9004
> e1a0000c
> e5e4 e1a0400a e59da00c ebfff960 eafffff0 e59f0024 e300180e ebfe0673
> e59f0018
> e604 e3001807 ebfe0670 e3a0b000 eaffff69 e59f0004 e3001863 ebfe066b
> c08fc448
> e624 e92d45f8 e1a0100d e3c15d7f e1a07003 e3c5503f e1a04000 e1a06002
> e5dd8020
> e644 e595300c e593a2fc ebffed2d e3500000 03e07012 0a00001b e1963007
> 1a00002a
> e664 e3580000 1595300c 0595500c 15935244 e2856008 e1963f9f e2833001
> e1862f93
> e684 e3320000 1afffffa e3580000 1a00000f e1a00004 e1a01005 ebfffdd5
> e1a07000
> e6a4 f57ff05f e1963f9f e2433001 e1862f93 e3320000 1afffffa f57ff05f
> e3530000

> LR: 0xc00aed78:
> ed78 13e05000 e1a07000 1a000018 e2125001 0a000016 e59f30ec e5931004
> e3510000
> ed98 01a0300d 03c36d7f 03c6603f 1a000016 e596e014 e3a03000 e59fc0cc
> e1a00004
> edb8 e5843030 e1a01007 e5973000 e2022002 e79ce10e e3a05001 e59fc0b0
> e08cc00e
> edd8 e06cc003 e27c3000 e0a3300c ebfffdcf e5943024 e59d1004 e5930000
> eb193a85
> edf8 e1a00005 e28dd00c e8bd85f0 e1a0200d e3c26d7f e3c6603f e5962004
> e2822001
> ee18 e5862004 e5938010 e3580000 0a00000b e5983000 e288a008 e1a05008
> e5950004
> ee38 e1a01004 e2855008 e12fff33 e0683005 e08a3003 e5133008 e3530000
> 1afffff6
> ee58 e5963004 e2433001 e5863004 e5963000 e3130002 05942028 0affffcc
> eb1932f2

> SP: 0xd2657e68:
> 7e68 00000000 ffffffff d2657e71 c14655b8 00000000 00000000 e17621b6
> 00000199
> 7e88 e1755e66 0000040f 00000005 00000000 670c4cf0 c004c2d0 ffffff92
> a00b0013
> 7ea8 00000000 00000000 670c4cf0 00000080 00000000 670c4cf0 00000000
> 00000000
> 7ec8 fc239343 00000006 c0a267d0 d2657ee8 c00aedf8 c00ce644 600b0013
> ffffffff
> 7ee8 ffffffff 00000000 00000000 000c0000 00000002 c02317d0 00000000
> 00000000
> 7f08 00000000 00000000 00001084 ffffffff 1948b723 00000000 00158135
> 00000000
> 7f28 00001084 00000000 fffffff7 c0a120c0 6c054fff 00000000 00000080
> 00000000
> 7f48 670c4cf0 00000000 d2656000 fc239343 00000006 c00befec 670c4cf0
> 00000000

> IP: 0xc0a26750:
> 6750 00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000
> 6770 00000000 00000000 00000000 00000000 00000000 00000000 00000000
> 00000000
> 6790 00000064 00008000 0000000f c1474020 00000008 00000004 c1474000
> c146c000
> 67b0 c1455000 0000002c c145c000 c1464000 00000001 00001000 00000000
> 00000003
> 67d0 01411000 01419000 01421000 01429000 00018000 00000002 00028ffb
> 0004ffff
> 67f0 00000001 00000032 0000fffa 00000001 d6212ae0 d6212a80 00000000
> d601bf20
> 6810 0000000f d601f580 d6212a20 d6000a20 00000010 c1476120 0000ffff
> 00000064
> 6830 d6000a80 0000000f c14b6120 00007fff d601bf80 00100000 d601d000
> 0000000f

> R10: 0xfc2392c3:
> 92c0 ******** ******** ******** ******** ******** ******** ********
> ********
> 92e0 ******** ******** ******** ******** ******** ******** ********
> ********
> 9300 ******** ******** ******** ******** ******** ******** ********
> ********
> 9320 ******** ******** ******** ******** ******** ******** ********
> ********
> 9340 ******** ******** ******** ******** ******** ******** ********
> ********
> 9360 ******** ******** ******** ******** ******** ******** ********
> ********
> 9380 ******** ******** ******** ******** ******** ******** ********
> ********
> 93a0 ******** ******** ******** ******** ******** ******** ********
> ********
> 93c0 ******** ******** ******** ********
> init: starting 'uim'
> ******** ******** ******** ********
> Process watchdog (pid: 2887, stack limit = 0xd26562f0)
> init: waitpid returned pid 3809, status = 0000ff00
> init: process 'uim', pid 3809 exited
> init: process 'uim' killing any children in process group
> Stack: (0xd2657ee8 to 0xd2658000)
> 7ee0: ffffffff 00000000 00000000 000c0000 00000002 c02317d0
> 7f00: 00000000 00000000 00000000 00000000 00001084 ffffffff 1948b723
> 00000000
> 7f20: 00158135 00000000 00001084 00000000 fffffff7 c0a120c0 6c054fff
> 00000000
> 7f40: 00000080 00000000 670c4cf0 00000000 d2656000 fc239343 00000006
> c00befec
> 7f60: 670c4cf0 00000000 ffffffff 00000001 e1755e66 00000199 e1755e66
> 00000199
> 7f80: 0000001d 3b9ab143 670c4cf0 670c4ce0 00000000 000000f0 c004ca84
> 00000000
> 7fa0: 41ea7398 c004c900 670c4cf0 670c4ce0 670c4cf0 00000080 00000000
> 77713d40
> 7fc0: 670c4cf0 670c4ce0 00000000 000000f0 00000000 00000000 00000000
> 41ea7398
> 7fe0: 00000001 77713d20 401b26cc 401c0614 600f0010 670c4cf0 28ffe821
> 28ffec21
> [<c00ce644>] (attach_task_by_pid+0x20/0x1e0) from [<00000000>] (
> (null))
> Code: e3c5503f e1a04000 e1a06002 e5dd8020 (e595300c)
> ---[ end trace db035b0b88b29047 ]---
> Kernel panic - not syncing: Fatal exception
> [<c0053fc4>] (unwind_backtrace+0x0/0x138) from [<c06f6bb0>]
> (panic+0x74/0x194)
> [<c06f6bb0>] (panic+0x74/0x194) from [<c0050454>] (die+0x218/0x284)
> [<c0050454>] (die+0x218/0x284) from [<c06f602c>]
> (__do_kernel_fault.part.3+0x54/0x74)
> [<c06f602c>] (__do_kernel_fault.part.3+0x54/0x74) from [<c0057d70>]
> (do_page_fault+0x2cc/0x334)
> [<c0057d70>] (do_page_fault+0x2cc/0x334) from [<c0046410>]
> (do_DataAbort+0x34/0x9c)
> [<c0046410>] (do_DataAbort+0x34/0x9c) from [<c004c2d0>]
> (__dabt_svc+0x70/0xa0)
> Exception stack(0xd2657ea0 to 0xd2657ee8)
> 7ea0: ffffff92 a00b0013 00000000 00000000 670c4cf0 00000080 00000000
> 670c4cf0
> 7ec0: 00000000 00000000 fc239343 00000006 c0a267d0 d2657ee8 c00aedf8
> c00ce644
> 7ee0: 600b0013 ffffffff
> [<c004c2d0>] (__dabt_svc+0x70/0xa0) from [<c00ce644>]
> (attach_task_by_pid+0x20/0x1e0)
> [<c00ce644>] (attach_task_by_pid+0x20/0x1e0) from [<00000000>] (
> (null))
> CPU1: stopping
> [<c0053fc4>] (unwind_backtrace+0x0/0x138) from [<c00463a8>]
> (do_IPI+0x1d4/0x208)
> [<c00463a8>] (do_IPI+0x1d4/0x208) from [<c004c34c>]
> (__irq_svc+0x4c/0xe8)
> Exception stack(0xd6067dc8 to 0xd6067e10)
> 7dc0: c1466320 00000000 200e0113 200e0113 00000000 00000002
> 7de0: c1466354 0000021d 00000000 c14663a0 00000000 d6067eb4 0000021e
> d6067e10
> 7e00: c0083af4 c0083df8 400e0113 ffffffff
> [<c004c34c>] (__irq_svc+0x4c/0xe8) from [<c0083df8>]
> (load_balance+0x818/0x8f4)
> [<c0083df8>] (load_balance+0x818/0x8f4) from [<c0086ba0>]
> (rebalance_domains+0xa4/0x190)
> [<c0086ba0>] (rebalance_domains+0xa4/0x190) from [<c0086cd0>]
> (run_rebalance_domains+0x44/0x11c)
> [<c0086cd0>] (run_rebalance_domains+0x44/0x11c) from [<c0092c88>]
> (__do_softirq+0xc8/0x25c)
> [<c0092c88>] (__do_softirq+0xc8/0x25c) from [<c00932d0>]
> (irq_exit+0x98/0xa0)
> [<c00932d0>] (irq_exit+0x98/0xa0) from [<c00462c4>]
> (do_IPI+0xf0/0x208)
> [<c00462c4>] (do_IPI+0xf0/0x208) from [<c004c34c>]
> (__irq_svc+0x4c/0xe8)
> Exception stack(0xd6067f90 to 0xd6067fd8)
> 7f80: 20000000 0000001d 00000000 f40dc010
> 7fa0: d6066000 c0ac4004 c0700a94 c0a2e83c 1000406a 412fc09a 00000000
> 00000000
> 7fc0: 00000001 d6067fd8 c005bf14 c004d468 200e0013 ffffffff
> [<c004c34c>] (__irq_svc+0x4c/0xe8) from [<c004d468>]
> (default_idle+0x24/0x28)
> [<c004d468>] (default_idle+0x24/0x28) from [<c004d778>]
> (cpu_idle+0xc8/0x108)
> [<c004d778>] (cpu_idle+0xc8/0x108) from [<106f25b4>] (0x106f25b4)
> CPU3: stopping
> [<c0053fc4>] (unwind_backtrace+0x0/0x138) from [<c00463a8>]
> (do_IPI+0x1d4/0x208)
> [<c00463a8>] (do_IPI+0x1d4/0x208) from [<c004c34c>]
> (__irq_svc+0x4c/0xe8)
> Exception stack(0xd609df90 to 0xd609dfd8)
> df80: 20000000 0000001d 00000000 f40dc010
> dfa0: d609c000 c0ac4004 c0700a94 c0a2e83c 1000406a 412fc09a 00000000
> 00000000
> dfc0: 00000003 d609dfd8 c005bf14 c004d468 200e0013 ffffffff
> [<c004c34c>] (__irq_svc+0x4c/0xe8) from [<c004d468>]
> (default_idle+0x24/0x28)
> [<c004d468>] (default_idle+0x24/0x28) from [<c004d778>]
> (cpu_idle+0xc8/0x108)
> [<c004d778>] (cpu_idle+0xc8/0x108) from [<106f25b4>] (0x106f25b4)
> CPU0: stopping
> [<c0053fc4>] (unwind_backtrace+0x0/0x138) from [<c00463a8>]
> (do_IPI+0x1d4/0x208)
> [<c00463a8>] (do_IPI+0x1d4/0x208) from [<c004c34c>]
> (__irq_svc+0x4c/0xe8)
> Exception stack(0xc0a11f68 to 0xc0a11fb0)
> 1f60: 20000000 0000001d 00000000 f40dc010 c0a10000 c0ac4004
> 1f80: c0700a94 c0a2e83c 1000406a 412fc09a 00000000 00000000 00000000
> c0a11fb0
> 1fa0: c005bf14 c004d468 200f0013 ffffffff
> [<c004c34c>] (__irq_svc+0x4c/0xe8) from [<c004d468>]
> (default_idle+0x24/0x28)
> [<c004d468>] (default_idle+0x24/0x28) from [<c004d778>]
> (cpu_idle+0xc8/0x108)
> [<c004d778>] (cpu_idle+0xc8/0x108) from [<c00088bc>]
> (start_kernel+0x29c/0x2ec)
> [<c00088bc>] (start_kernel+0x29c/0x2ec) from [<10008040>]
> (0x10008040)
> --
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