Linux 2.4.7-ac1 PNP Oops on shutdown

From: Udo A. Steinberg (
Date: Fri Jul 27 2001 - 13:49:19 EST

Hi Alan,

2.4.7-ac1 oopses reproduceably during every shutdown. As far as I can tell,
2.4.6-ac5 didn't exhibit this behaviour.

Oops is attached.


ksymoops 2.4.1 on i686 2.4.7-ac1. Options used
     -V (default)
     -k /proc/ksyms (default)
     -l /proc/modules (default)
     -o /lib/modules/2.4.7-ac1/ (default)
     -m /boot/ (specified)
Unable to handle kernel NULL pointer dereference at virtual address 00000000
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c0112b5d>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010002
eax: c0317670 ebx: 00000000 ecx: 00000246 edx: cff0ff94
esi: cff16000 edi: c0317674 ebp: cff17fc8 esp: cff17fb4
ds: 0018 es: 0018 ss: 0018
Process kpnpbios (pid: 2, stackpage=cff17000)
Stack: 00010f00 cff16000 ffffe000 00000001 00000286 00010f00 c011792d c01dde51
       c0317670 00000000 00010f00 c144bfc0 00000000 0008e000 cff16000 c01054c8
       00000000 00000078 c02b1fc0
Call Trace: [<c011792d>] [<c01dde51>] [<c01054c8>]
Code: 8b 03 0f 0d 00 eb 64 8b 4b fc 8b 01 a8 03 74 54 31 c0 9c 5e

>>EIP; c0112b5d <complete+1d/a0> <=====
Trace; c011792d <complete_and_exit+d/20>
Trace; c01dde51 <pnp_dock_thread+d1/e0>
Trace; c01054c8 <kernel_thread+28/40>
Code; c0112b5d <complete+1d/a0>
00000000 <_EIP>:
Code; c0112b5d <complete+1d/a0> <=====
   0: 8b 03 mov (%ebx),%eax <=====
Code; c0112b5f <complete+1f/a0>
   2: 0f 0d 00 prefetch (%eax)
Code; c0112b62 <complete+22/a0>
   5: eb 64 jmp 6b <_EIP+0x6b> c0112bc8 <complete+88/a0>
Code; c0112b64 <complete+24/a0>
   7: 8b 4b fc mov 0xfffffffc(%ebx),%ecx
Code; c0112b67 <complete+27/a0>
   a: 8b 01 mov (%ecx),%eax
Code; c0112b69 <complete+29/a0>
   c: a8 03 test $0x3,%al
Code; c0112b6b <complete+2b/a0>
   e: 74 54 je 64 <_EIP+0x64> c0112bc1 <complete+81/a0>
Code; c0112b6d <complete+2d/a0>
  10: 31 c0 xor %eax,%eax
Code; c0112b6f <complete+2f/a0>
  12: 9c pushf
Code; c0112b70 <complete+30/a0>
  13: 5e pop %esi
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This archive was generated by hypermail 2b29 : Tue Jul 31 2001 - 21:00:34 EST