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Typing 'rmmod i810_audio' proced this oops. Perhaps that's useful info.
I can't reproduce this at will -- this happened after unloading alsa,
loading i810_audio, then trying to unload it.
Unable to handle kernel NULL pointer dereference at virtual address 00000004
d09dccdf
*pde =3D 00000000
Oops: 0002
CPU: 0
EIP: 0010:[<d09dccdf>] Tainted: P Z
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010246
eax: 00000000 ebx: cfb295a0 ecx: d09df9b8 edx: 00000000
esi: cf6f85f8 edi: cf6f8400 ebp: 00000003 esp: c8e0ff5c
ds: 0018 es: 0018 ss: 0018
Process rmmod (pid: 10044, stackpage=3Dc8e0f000)
Stack: 00000000 d09e54b9 cfb295a0 00000000 cfe2dc00 d09e7240 d09e1000 bfffe=
b08=20
c01f7996 cfe2dc00 d09e1000 fffffff0 d09e58aa d09e7240 c01181f3 d09e1=
000=20
fffffff0 cb610000 bfffeb08 c0117597 d09e1000 00000000 c8e0e000 00000=
001=20
Call Trace: [<d09e54b9>] [<d09e7240>] [<c01f7996>] [<d09e58aa>] [<d09e72=
40>]
[<c01181f3>] [<c0117597>] [<c01086df>]
Code: 89 50 04 89 02 c7 03 00 00 00 00 c7 43 04 00 00 00 00 ff 05=20
>>EIP; d09dccdf <[ac97_codec]ac97_release_codec+1b/58> <=3D=3D=3D=3D=3D
>>ebx; cfb295a0 <_end+f820788/10501248>
>>ecx; d09df9b8 <[ac97_codec]codec_sem+0/13>
>>esi; cf6f85f8 <_end+f3ef7e0/10501248>
>>edi; cf6f8400 <_end+f3ef5e8/10501248>
>>esp; c8e0ff5c <_end+8b07144/10501248>
Trace; d09e54b9 <[ac97_codec].data.end+5aee/9695>
Trace; d09e7240 <[ac97_codec].data.end+7875/9695>
Trace; c01f7996 <pci_unregister_driver+3a/54>
Trace; d09e58aa <[ac97_codec].data.end+5edf/9695>
Trace; d09e7240 <[ac97_codec].data.end+7875/9695>
Trace; c01181f3 <free_module+17/98>
Trace; c0117597 <sys_delete_module+f3/1b0>
Trace; c01086df <system_call+33/38>
Code; d09dccdf <[ac97_codec]ac97_release_codec+1b/58>
00000000 <_EIP>:
Code; d09dccdf <[ac97_codec]ac97_release_codec+1b/58> <=3D=3D=3D=3D=3D
0: 89 50 04 mov %edx,0x4(%eax) <=3D=3D=3D=3D=3D
Code; d09dcce2 <[ac97_codec]ac97_release_codec+1e/58>
3: 89 02 mov %eax,(%edx)
Code; d09dcce4 <[ac97_codec]ac97_release_codec+20/58>
5: c7 03 00 00 00 00 movl $0x0,(%ebx)
Code; d09dccea <[ac97_codec]ac97_release_codec+26/58>
b: c7 43 04 00 00 00 00 movl $0x0,0x4(%ebx)
Code; d09dccf1 <[ac97_codec]ac97_release_codec+2d/58>
12: ff 05 00 00 00 00 incl 0x0
=2D-J.
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