Re: 2.4.10: Crash on boot with trident driver non-module

Trever L. Adams (vichu@digitalme.com)
26 Sep 2001 08:32:12 -0400


Well, I realized that the EIP wasn't typed in correctly. the l was
supposed to be a 1. The new output is:

>>???; c01ba1ce <ac97_init_mixer+7e/e0> <=====
Trace; c01bae74 <pci_announce_device+34/50>
Trace; c01baed2 <pci_register_driver+42/60>
Trace; c0105000 <_stext+0/0>
Trace; c0105049 <init+9/140>
Trace; c0105000 <_stext+0/0>
Trace; c0105536 <kernel_thread+26/30>
Trace; c0105040 <init+0/140>

Hope this helps. I am having a hard time seeing where the changes in
2.4.9 would cause this NULL dereference in ac97_init_mixer when it is
compiled in but not when it is a module.

Trever

> ac97_codec: AC97 Codec, id 0x0000:0x0000 (unknown)
> Unable to handle kernel Null pointer derefference at virtual addresss 00000000
> *pde = 00000000
> Oops: 0000
> CPU: 0
> EIP: 0010:[<c01balce>]
> EFLAGS: 00010206
> EAX: 00000000 ebx: c7faac80 ecx: 00000802 edx: 00000006
> esi: 00000000 edi: c7faad30 ebp: 00000001 esp: c1219f48
> ds: 0018 es: 0018 ss: 0018
> Process swapper pid 1, stackpage=c1219000
> stack: c7faac80 00000040 c7faad30 00000001
> c026831b c7faac80 00000024 00000003
> c024da40 c1275000 ffffffff 000cc000 (may be 0000cc00)
> c02687b1 c1275000 0200180d c027063c
> c024db00 c1212000 00000000 c01bae74
> c1212000 c026063c c1212000 c024db00
> call trace: [<c01bae74>] [<c01baed2>] [<c0105000>] [<c0105049>]
> [<c0105000>] [<c0105536>] [<c0105040>]
> code: 8b 00 85 c0 74 04 53 ff d0 5a 31 ed 83 3d 40 dc 24 c0 ff ba
> Using defaults from ksymoops -a i386
> Error (Oops_bfd_perror): /tmp/ksymoops.pWqCMC Invalid bfd target
>
> Trace; c01bae74 <pci_announce_device+34/50>
> Trace; c01baed2 <pci_register_driver+42/60>
> Trace; c0105000 <_stext+0/0>
> Trace; c0105049 <init+9/140>
> Trace; c0105000 <_stext+0/0>
> Trace; c0105536 <kernel_thread+26/30>
> Trace; c0105040 <init+0/140>
>
> Kernel Panic: Attempted to kill init!
>
> 984 warnings and 1 error issued. Results may not be reliable.

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