From: Chris Pascoe <c.pascoe@itee.uq.edu.au>
Subject: Re: nfsd oops - exiting??
Date: Fri, 17 May 2002 16:31:09 +1000 (EST)
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And another oops with the same backtrace today - nobody has any
ideas/suggestions where to look?

Chris

On Tue, 14 May 2002, Chris Pascoe wrote:

> Hi,
>
> After about 5 days of uptime on my SMP NFS server running 2.4.18+(CVS) XFS I
> have experienced the following oops.  At least once before I have seen other
> oopses that have occurred containing do_exit and sys_wait4, but I can't
> obviously see how this code path was taken.  It goes without saying that I
> can't reproduce the crash on demand..
>
> Has anyone else seen similar traces and/or can suggest how the nfsd code got
> to this point so I can attempt to investigate further?
>
> The kernel is tainted by the Intel e1000 driver in the oops that follows.
>
> Thanks,
> Chris
>
> --8<-- oops starts
> Unable to handle kernel NULL pointer dereference at virtual address 00000286
> c011be54
> *pde = 00000000
> Oops: 0002
> CPU:    0
> EIP:    0010:[<c011be54>]    Tainted: P
> Using defaults from ksymoops -t elf32-i386 -a i386
> EFLAGS: 00010286
> eax: 00000000   ebx: f71ec000   ecx: 00000001   edx: 00000286
> esi: 00000000   edi: 00000286   ebp: f71edf94   esp: f71edf84
> ds: 0018   es: 0018   ss: 0018
> Process nfsd (pid: 889, stackpage=f71ed000)
> Stack: f71ec000 00000000 00000000 f71ec000 f71edfac c011c6d6 00000286
> f71ec000
>        f7245ed4 f741ce00 f71edfb8 c011c84c 00000000 f7245edc c010722b
> 00000100
>        c200b800 0000001f f7245ed4 f741ce00 f7245edc 00000001 f7440018
> f71b0018
> Call Trace: [<c011c6d6>] [<c011c84c>] [<c010722b>] [<c010588e>]
> Code: f0 ff 0f 0f 94 c0 84 c0 0f 84 9e 00 00 00 c7 45 fc 00 00 00
>
> >>EIP; c011be54 <put_files_struct+c/c4>   <=====
> Trace; c011c6d6 <do_exit+12e/27c>
> Trace; c011c84c <sys_wait4+0/3d8>
> Trace; c010722b <system_call+33/38>
> Trace; c010588e <kernel_thread+2a/38>
> Code;  c011be54 <put_files_struct+c/c4>
> 00000000 <_EIP>:
> Code;  c011be54 <put_files_struct+c/c4>   <=====
>    0:   f0 ff 0f                  lock decl (%edi)   <=====
> Code;  c011be57 <put_files_struct+f/c4>
>    3:   0f 94 c0                  sete   %al
> Code;  c011be5a <put_files_struct+12/c4>
>    6:   84 c0                     test   %al,%al
> Code;  c011be5c <put_files_struct+14/c4>
>    8:   0f 84 9e 00 00 00         je     ac <_EIP+0xac> c011bf00
> <put_files_struct+b8/c4>
> Code;  c011be62 <put_files_struct+1a/c4>
>    e:   c7 45 fc 00 00 00 00      movl   $0x0,0xfffffffc(%ebp)


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