[Nottingham] Deciphering a kernel Ooops

[Martin]

Martin wrote:
> Hi Folks,
> 
> Just had this system slowly die just now. Checking the logs, the only 
> anomalies are a few fd0 errors for a dodgy floppy disk from yesterday, 
> and a kernel Ooops from earlier this morning.
> 
> So who can give a more human translation of the Ooops message?
> 
> The PID 29632 is something that was a newly created task at about that 
> time.

Just found what was getting started at that time, Folding at Home4:

[08:59:34] + News From Folding at Home: Welcome to Folding at Home
[08:59:34] Loaded queue successfully.
[08:59:35] - Deadline time not received.
[08:59:36] + Closed connections
[08:59:36]
[08:59:36] + Processing work unit
[08:59:36] Core required: FahCore_65.exe
[08:59:36] Core found.
[08:59:36] Working on Unit 07 [September 17 08:59:36]
[08:59:36] + Working ...


To be tried again, AFTER a full backup!

Comments welcomed as to how a user prog can oops the kernel...


Thanks,
Martin



> /var/log/messages snippet attached.
> 
> Mandrake 10.0.1, AMD 1800XP Palomino, 2x HDDs, nVidia AGP graphics card, 
> MSI K7T266 Pro2RU motherboard.
> 
> Thanks,
> Martin
> 
> 
> 
> ------------------------------------------------------------------------
> 
> Sep 17 09:59:30 muse06 kernel: Unable to handle kernel NULL pointer dereference at virtual address 000000b1
> Sep 17 09:59:30 muse06 kernel:  printing eip:
> Sep 17 09:59:30 muse06 kernel: c01effec
> Sep 17 09:59:30 muse06 kernel: *pde = 00000000
> Sep 17 09:59:30 muse06 kernel: Oops: 0000 [#1]
> Sep 17 09:59:30 muse06 kernel: CPU:    0
> Sep 17 09:59:31 muse06 kernel: EIP:    0060:[init_dev+28/1312]    Tainted: P   VLI
> Sep 17 09:59:31 muse06 kernel: EIP:    0060:[<c01effec>]    Tainted: P   VLI
> Sep 17 09:59:31 muse06 kernel: EFLAGS: 00210246
> Sep 17 09:59:31 muse06 kernel: EIP is at init_dev+0x1c/0x520
> Sep 17 09:59:31 muse06 kernel: eax: 0858b058   ebx: c0413a80   ecx: c035afd8   edx: fffffffa
> Sep 17 09:59:31 muse06 kernel: esi: 0000000d   edi: cc3df180   ebp: db5efee4   esp: db5efea4
> Sep 17 09:59:31 muse06 kernel: ds: 007b   es: 007b   ss: 0068
> Sep 17 09:59:31 muse06 kernel: Process sh (pid: 29632, threadinfo=db5ee000 task=e82e8040)
> Sep 17 09:59:31 muse06 kernel: Stack: 0858b058 00299a31 00000003 00000000 db5eff68 effe4260 ef2921b6 db5efecc
> Sep 17 09:59:31 muse06 kernel:        c012f542 00000000 db5efee4 c015f709 00000000 c0413a80 0000000d cc3df180
> Sep 17 09:59:31 muse06 kernel:        db5eff18 c01f0cad 0000000d 0858b058 db5eff04 88020a3e 00500000 00000000
> Sep 17 09:59:31 muse06 kernel: Call Trace:
> Sep 17 09:59:31 muse06 kernel:  [in_group_p+34/48] in_group_p+0x22/0x30
> Sep 17 09:59:31 muse06 kernel:  [<c012f542>] in_group_p+0x22/0x30
> Sep 17 09:59:31 muse06 kernel:  [vfs_permission+265/320] vfs_permission+0x109/0x140
> Sep 17 09:59:31 muse06 kernel:  [<c015f709>] vfs_permission+0x109/0x140
> Sep 17 09:59:31 muse06 kernel:  [tty_open+221/816] tty_open+0xdd/0x330
> Sep 17 09:59:31 muse06 kernel:  [<c01f0cad>] tty_open+0xdd/0x330
> Sep 17 09:59:31 muse06 kernel:  [chrdev_open+138/288] chrdev_open+0x8a/0x120
> Sep 17 09:59:31 muse06 kernel:  [<c015bbba>] chrdev_open+0x8a/0x120
> Sep 17 09:59:31 muse06 kernel:  [dentry_open+264/416] dentry_open+0x108/0x1a0
> Sep 17 09:59:31 muse06 kernel:  [<c0153368>] dentry_open+0x108/0x1a0
> Sep 17 09:59:31 muse06 kernel:  [filp_open+78/96] filp_open+0x4e/0x60
> Sep 17 09:59:31 muse06 kernel:  [<c015324e>] filp_open+0x4e/0x60
> Sep 17 09:59:31 muse06 kernel:  [sys_open+63/128] sys_open+0x3f/0x80
> Sep 17 09:59:31 muse06 kernel:  [<c015360f>] sys_open+0x3f/0x80
> Sep 17 09:59:31 muse06 kernel:  [sysenter_past_esp+82/121] sysenter_past_esp+0x52/0x79
> Sep 17 09:59:31 muse06 kernel:  [<c010afb9>] sysenter_past_esp+0x52/0x79
> Sep 17 09:59:31 muse06 kernel:
> Sep 17 09:59:31 muse06 kernel: Code: 26 00 00 5d c3 8d 76 00 8d bc 27 00 00 00 00 55 89 e5 57 56 53 83 ec 30 c7 45 cc 00 00 00 00 8b 75 08 8b 45 0c 50 e8 a4 ff ff ff <8b> 86 a4 0
> 0 00 00 8b 55 0c 5f 8b 1c 90 85 db 74 45 8b 83 a0 00
> 
> 
> ------------------------------------------------------------------------


-- 
----------------
Martin Lomas
martin at ml1.co.uk
----------------