oops with 2.6.6-rc1

[carbonated beverage <ramune@net-ronin.org>]

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Not sure if ksymoops 2.4.9 is the right version, but that's what
I found via the oops-tracing.txt file in the src tree.

This kernel was via a bk pull, not sure when I grabbed it.

Really hard bug to reproduce, didn't notice for quite a while.
Any suggestions on tracking it down?

Debian/stable, gcc 3.3.1

Oops decode from ksymoops below, .config, etc info attached as
seperate file due to sheer size.  Yes, it has a lot of modules.
Helps boot time on this IBM T30 quite a bit.  :-)

ksymoops 2.4.9 on i686 2.6.6-rc1.  Options used
     -V (default)
     -k /proc/ksyms (default)
     -l /proc/modules (default)
     -o /lib/modules/2.6.6-rc1/ (default)
     -m /boot/System.map-2.6.6-rc1 (specified)

Error (regular_file): read_ksyms stat /proc/ksyms failed
No modules in ksyms, skipping objects
No ksyms, skipping lsmod
Apr 23 07:35:03 hasenpfeffer kernel: Unable to handle kernel paging request at virtual address 0008c940
Apr 23 07:35:03 hasenpfeffer kernel: c01425b8
Apr 23 07:35:03 hasenpfeffer kernel: *pde = 00000000
Apr 23 07:35:03 hasenpfeffer kernel: Oops: 0000 [#1]
Apr 23 07:35:03 hasenpfeffer kernel: CPU:    0
Apr 23 07:35:03 hasenpfeffer kernel: EIP:    0060:[<c01425b8>]    Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
Apr 23 07:35:03 hasenpfeffer kernel: EFLAGS: 00010202   (2.6.6-rc1) 
Apr 23 07:35:03 hasenpfeffer kernel: eax: 0008c940   ebx: c20a9080   ecx: c0143bdb   edx: cff54700
Apr 23 07:35:03 hasenpfeffer kernel: esi: 00018800   edi: c7031d1c   ebp: ffffffe9   esp: c1b65f54
Apr 23 07:35:03 hasenpfeffer kernel: ds: 007b   es: 007b   ss: 0068
Apr 23 07:35:03 hasenpfeffer kernel: Stack: 00000000 c2741000 00018800 c1b64000 c0142526 c7036580 cff54700 00018800 
Apr 23 07:35:03 hasenpfeffer kernel:        080574fc 00000004 c2741000 c7036580 cff54700 c2741000 c1b64000 080574fc 
Apr 23 07:35:03 hasenpfeffer kernel:        00000103 00000001 00018801 00000000 c014292b c2741000 00018800 00000000 
Apr 23 07:35:03 hasenpfeffer kernel: Call Trace: [<c0142526>]  [<c014292b>]  [<c0103bcf>] 
Apr 23 07:35:03 hasenpfeffer kernel: Code: 8b 10 be 01 00 00 00 85 d2 74 35 b8 00 e0 ff ff 21 e0 ff 40 


>>EIP; c01425b8 <dentry_open+88/1e4>   <=====

>>ebx; c20a9080 <pg0+1da5080/3fcfa000>
>>ecx; c0143bdb <get_empty_filp+4f/c8>
>>edx; cff54700 <pg0+fc50700/3fcfa000>
>>edi; c7031d1c <pg0+6d2dd1c/3fcfa000>
>>ebp; ffffffe9 <__kernel_rt_sigreturn+1ba9/????>
>>esp; c1b65f54 <pg0+1861f54/3fcfa000>

Trace; c0142526 <filp_open+52/5c>
Trace; c014292b <sys_open+37/90>
Trace; c0103bcf <syscall_call+7/b>

Code;  c01425b8 <dentry_open+88/1e4>
00000000 <_EIP>:
Code;  c01425b8 <dentry_open+88/1e4>   <=====
   0:   8b 10                     mov    (%eax),%edx   <=====
Code;  c01425ba <dentry_open+8a/1e4>
   2:   be 01 00 00 00            mov    $0x1,%esi
Code;  c01425bf <dentry_open+8f/1e4>
   7:   85 d2                     test   %edx,%edx
Code;  c01425c1 <dentry_open+91/1e4>
   9:   74 35                     je     40 <_EIP+0x40> c01425f8 <dentry_open+c8/1e4>
Code;  c01425c3 <dentry_open+93/1e4>
   b:   b8 00 e0 ff ff            mov    $0xffffe000,%eax
Code;  c01425c8 <dentry_open+98/1e4>
  10:   21 e0                     and    %esp,%eax
Code;  c01425ca <dentry_open+9a/1e4>
  12:   ff 40 00                  incl   0x0(%eax)

Apr 23 07:35:04 hasenpfeffer kernel:  <1>Unable to handle kernel paging request at virtual address 0008c940
Apr 23 07:35:04 hasenpfeffer kernel: c01425b8
Apr 23 07:35:04 hasenpfeffer kernel: *pde = 00000000
Apr 23 07:35:04 hasenpfeffer kernel: Oops: 0000 [#2]
Apr 23 07:35:04 hasenpfeffer kernel: CPU:    0
Apr 23 07:35:04 hasenpfeffer kernel: EIP:    0060:[<c01425b8>]    Not tainted
Apr 23 07:35:04 hasenpfeffer kernel: EFLAGS: 00010202   (2.6.6-rc1) 
Apr 23 07:35:04 hasenpfeffer kernel: eax: 0008c940   ebx: c20a9680   ecx: c0143bdb   edx: cff54700
Apr 23 07:35:04 hasenpfeffer kernel: esi: 00018800   edi: c7031d1c   ebp: ffffffe9   esp: c1c05f54
Apr 23 07:35:04 hasenpfeffer kernel: ds: 007b   es: 007b   ss: 0068
Apr 23 07:35:04 hasenpfeffer kernel: Stack: 00000000 c24b9000 00018800 c1c04000 c0142526 c7036580 cff54700 00018800 
Apr 23 07:35:04 hasenpfeffer kernel:        0805801c 00000004 c24b9000 c7036580 cff54700 c24b9000 c1c04000 0805801c 
Apr 23 07:35:04 hasenpfeffer kernel:        00000103 00000001 00018801 00000000 c014292b c24b9000 00018800 00000000 
Apr 23 07:35:04 hasenpfeffer kernel: Call Trace: [<c0142526>]  [<c014292b>]  [<c0103bcf>] 
Apr 23 07:35:04 hasenpfeffer kernel: Code: 8b 10 be 01 00 00 00 85 d2 74 35 b8 00 e0 ff ff 21 e0 ff 40 


>>EIP; c01425b8 <dentry_open+88/1e4>   <=====

>>ebx; c20a9680 <pg0+1da5680/3fcfa000>
>>ecx; c0143bdb <get_empty_filp+4f/c8>
>>edx; cff54700 <pg0+fc50700/3fcfa000>
>>edi; c7031d1c <pg0+6d2dd1c/3fcfa000>
>>ebp; ffffffe9 <__kernel_rt_sigreturn+1ba9/????>
>>esp; c1c05f54 <pg0+1901f54/3fcfa000>

Trace; c0142526 <filp_open+52/5c>
Trace; c014292b <sys_open+37/90>
Trace; c0103bcf <syscall_call+7/b>

Code;  c01425b8 <dentry_open+88/1e4>
00000000 <_EIP>:
Code;  c01425b8 <dentry_open+88/1e4>   <=====
   0:   8b 10                     mov    (%eax),%edx   <=====
Code;  c01425ba <dentry_open+8a/1e4>
   2:   be 01 00 00 00            mov    $0x1,%esi
Code;  c01425bf <dentry_open+8f/1e4>
   7:   85 d2                     test   %edx,%edx
Code;  c01425c1 <dentry_open+91/1e4>
   9:   74 35                     je     40 <_EIP+0x40> c01425f8 <dentry_open+c8/1e4>
Code;  c01425c3 <dentry_open+93/1e4>
   b:   b8 00 e0 ff ff            mov    $0xffffe000,%eax
Code;  c01425c8 <dentry_open+98/1e4>
  10:   21 e0                     and    %esp,%eax
Code;  c01425ca <dentry_open+9a/1e4>
  12:   ff 40 00                  incl   0x0(%eax)


1 error issued.  Results may not be reliable.

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