Messages in this thread | | | Subject | Re: 2.6.18-rc4-mm1 BUG null pointer deref while saving a file | From | Dave Kleikamp <> | Date | Wed, 16 Aug 2006 09:28:46 -0500 |
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On Wed, 2006-08-16 at 13:44 +0200, Helge Hafting wrote: > Aug 16 13:20:30 hh kernel: BUG: unable to handle kernel NULL pointer > dereference at virtual address 00000000 > Aug 16 13:20:30 hh kernel: printing eip: > Aug 16 13:20:30 hh kernel: c0468863 > Aug 16 13:20:30 hh kernel: *pde = 00000000 > Aug 16 13:20:30 hh kernel: Oops: 0002 [#1] > Aug 16 13:20:30 hh kernel: 4K_STACKS > Aug 16 13:20:30 hh kernel: last sysfs file: > /devices/platform/i2c-9191/9191-0290/in0_input > Aug 16 13:20:30 hh kernel: CPU: 0 > Aug 16 13:20:30 hh kernel: EIP: 0060:[<c0468863>] Not tainted VLI > Aug 16 13:20:30 hh kernel: EFLAGS: 00010002 (2.6.18-rc4-mm1 #7) > Aug 16 13:20:30 hh kernel: EIP is at __down+0x5c/0xed > Aug 16 13:20:30 hh kernel: eax: 00000000 ebx: d462e7e4 ecx: > c14e7e40 edx: dde06f0c > Aug 16 13:20:30 hh kernel: esi: 00000286 edi: c3365550 ebp: > d462e7ec esp: dde06efc > Aug 16 13:20:30 hh kernel: ds: 007b es: 007b ss: 0068 > Aug 16 13:20:30 hh kernel: Process lyx (pid: 9353, ti=dde06000 > task=c3365550 task.ti=dde06000) > Aug 16 13:20:30 hh kernel: Stack: dde06f0c 00000001 c3365550 c0116941 > d462e7ec 00000000 00000008 d851a9a8 > Aug 16 13:20:30 hh kernel: d462e7c0 d32a1200 c0466bc7 c14e7e40 > dde06000 c01ed987 00000008 00000000 > Aug 16 13:20:30 hh kernel: 00000000 00000000 d7a31c00 caf9be0c > 00000000 00001dbb d462e7e4 00000008 > Aug 16 13:20:30 hh kernel: Call Trace: > Aug 16 13:20:30 hh kernel: [<c0466bc7>] __down_failed+0x7/0xc > Aug 16 13:20:30 hh kernel: DWARF2 unwinder stuck at __down_failed+0x7/0xc > Aug 16 13:20:31 hh kernel: Leftover inexact backtrace: > Aug 16 13:20:31 hh kernel: [<c01ed987>] .text.lock.file+0x54/0x9d > Aug 16 13:20:31 hh kernel: [<c01516bd>] __fput+0xb2/0x163 > Aug 16 13:20:31 hh kernel: [<c014ee9d>] filp_close+0x3e/0x62 > Aug 16 13:20:31 hh kernel: [<c0150168>] sys_close+0x5c/0x6b > Aug 16 13:20:31 hh kernel: [<c01028c9>] sysenter_past_esp+0x56/0x79
By any chance would you be using cifs? This looks just like the bug that is fixed by this patch: http://www.kernel.org/git/gitweb.cgi?p=linux/kernel/git/sfrench/cifs-2.6.git;a=commitdiff;h=e466e4876bf39474e15d0572f2204578137ae7f5
> Aug 16 13:20:31 hh kernel: ======================= > Aug 16 13:20:31 hh kernel: Code: 0c 41 69 11 c0 c7 07 02 00 00 00 9c 5e > fa 83 4c 24 04 01 8d 6b 08 8b 45 04 8d 54 24 10 89 14 24 89 55 04 89 6c > 24 10 89 44 24 14 <89> 10 8b 43 04 8d 50 01 89 53 04 01 03 0f 98 c0 84 > c0 74 26 c7 > Aug 16 13:20:31 hh kernel: EIP: [<c0468863>] __down+0x5c/0xed SS:ESP > 0068:dde06efc > > The lyx process is a word processor. I did a save, the window > disappeared, and this was logged. > > Helge Hafting -- David Kleikamp IBM Linux Technology Center
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