Re: fs problem in 2.4.0-test10 -- oops in directory access

From: Keith Owens (kaos@ocs.com.au)
Date: Wed Nov 08 2000 - 01:48:45 EST


On Wed, 8 Nov 2000 00:38:33 -0600 (CST),
Matthew Hanselman <mjhans@quiq.com> wrote:
>I can poke around tomorrow morning without a reboot, but then I'll have to
>reboot (so please respond via email if I can do anything). I tried
>grinding the message through ksymoops-2.3.5, and it complains with this
>error:
>
>Warning (Oops_code): trailing garbage ignored on Code: line
> Text: 'Code: Bad EIP value. '
> Garbage: 'IP value. '
>Using defaults from ksymoops -t elf32-i386 -a i386
>Error (Oops_code_values): invalid value 0xBad in Code line, must be 2, 4, 8 or 1
>Error (Oops_code_values): invalid value 0xE in Code line, must be 2, 4, 8 or 16

Are you sure that is ksymoops 2.3.5? My version of 2.3.5 handles
'Code: Bad EIP value. '. ksymoops >= 2.3.4 should handle it correctly.

>Nov 8 00:11:42 chewbacca kernel: Unable to handle kernel paging request at virtual address 00c014aa
>Nov 8 00:11:42 chewbacca kernel: printing eip:
>Nov 8 00:11:42 chewbacca kernel: 00c014aa
>Nov 8 00:11:42 chewbacca kernel: *pde = 00000000
>Nov 8 00:11:42 chewbacca kernel: Oops: 0000
>Nov 8 00:11:42 chewbacca kernel: CPU: 0
>Nov 8 00:11:42 chewbacca kernel: EIP: 0010:[usb_stor_exit+12588154/-1072693296]
>Nov 8 00:11:42 chewbacca kernel: EFLAGS: 00010206
>Nov 8 00:11:42 chewbacca kernel: eax: 00c014aa ebx: cf0a1fa4 ecx: da155940 edx: c4a70440
>Nov 8 00:11:42 chewbacca kernel: esi: 00000000 edi: bffff020 ebp: bffff00c esp: cf0a1f94
>Nov 8 00:11:42 chewbacca kernel: ds: 0018 es: 0018 ss: 0018
>Nov 8 00:11:42 chewbacca kernel: Process ls (pid: 9036, stackpage=cf0a1000)
>Nov 8 00:11:42 chewbacca kernel: Stack: c0135dd7 c4a70440 cf0a0000 bffff020 c4a70440 eff83540 00000003 bfffe830
>Nov 8 00:11:42 chewbacca kernel: bfffe81c 00000008 00000001 c010a4fb bffff020 080549ac 4010fd60 bffff020
>Nov 8 00:11:42 chewbacca kernel: bffff020 bffff00c 000000c4 0000002b 0000002b 000000c4 400c4e1c 00000023
>Nov 8 00:11:42 chewbacca kernel: Call Trace: [sys_lstat64+55/112] [system_call+51/56]
>Nov 8 00:11:42 chewbacca kernel: Code: Bad EIP value.

sys_lstat64+55 has branched to the value in eax and blown up. It looks like
the data in eax is a kernel address shifted right one byte.

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