As I keep having oops (3 out of 5 run maybe) on the 2.6.3 kernel, I take 
the time to report my problem here.

Tell me if anything else is missing.


ksymoops 2.4.9 on i686 2.4.25.  Options used
      -v /lib/modules/2.6.4-rc1-mm2/build/vmlinux (specified)
      -k /lib/modules/2.6.4-rc1-mm2/build/ksyms (specified)
      -l /proc/modules (default)
      -o /lib/modules/2.4.25/ (default)
      -m /lib/modules/2.6.4-rc1-mm2/build/System.map (specified)

Error (regular_file): read_ksyms stat 
/lib/modules/2.6.4-rc1-mm2/build/ksyms failed
ksymoops: No such file or directory
No modules in ksyms, skipping objects
No ksyms, skipping lsmod
Mar  4 08:19:55 localhost kernel: Unable to handle kernel paging request 
at virtual address 00002000
Mar  4 08:19:55 localhost kernel: c016b8f0
Mar  4 08:19:55 localhost kernel: *pde = 00000000
Mar  4 08:19:55 localhost kernel: Oops: 0000 [#1]
Mar  4 08:19:55 localhost kernel: CPU:    0
Mar  4 08:19:55 localhost kernel: EIP:    0060:[<c016b8f0>]    Tainted: 
P   VLI
Using defaults from ksymoops -t elf32-i386 -a i386
Mar  4 08:19:55 localhost kernel: EFLAGS: 00010206
Mar  4 08:19:55 localhost kernel: eax: d927e000   ebx: d8410013   ecx: 
00000010   edx: c1540000
Mar  4 08:19:55 localhost kernel: esi: c1561df4   edi: dffe0e80   ebp: 
00002000   esp: d927fe7c
Mar  4 08:19:55 localhost kernel: ds: 007b   es: 007b   ss: 0068
Mar  4 08:19:55 localhost kernel: Stack: 000002ec d63195f8 00000000 
00000000 c1561df4 d927e000 000002ec 00000000
Mar  4 08:19:55 localhost kernel:        d8410013 6a3cb8aa 0000000d 
d8410013 d927ff70 dffe0e80 d927fefc c0161670
Mar  4 08:19:55 localhost kernel:        d819f380 d927ff04 d99cb080 
d8410013 d927fefc d81a1d78 d927ff04 c0161bcb
Mar  4 08:19:55 localhost kernel: Call Trace:
Mar  4 08:19:55 localhost kernel:  [<c0161670>] do_lookup+0x30/0xb0
Mar  4 08:19:55 localhost kernel:  [<c0161bcb>] link_path_walk+0x4db/0x960
Mar  4 08:19:55 localhost kernel:  [<c015dad4>] cp_new_stat64+0x114/0x130
Mar  4 08:19:55 localhost kernel:  [<c0162963>] open_namei+0x83/0x400
Mar  4 08:19:55 localhost kernel:  [<c0152e9e>] filp_open+0x3e/0x70
Mar  4 08:19:55 localhost kernel:  [<c015335b>] sys_open+0x5b/0x90
Mar  4 08:19:55 localhost kernel:  [<c045d657>] syscall_call+0x7/0xb
Mar  4 08:19:55 localhost kernel: Code: 15 6c dd 5f c0 23 05 64 dd 5f c0 
8d 04 82 89 44 24 10 b8 00 e0 ff ff 21 e0 ff 40 14 8b 74 24 10 8b 2e 85 
ed 74 2f 89 44 24 14 90 <8b> 45 00 8d 44 20 00 8b 7c 24 10 8d 5d 90 39 
7b 78 75 17 8b 43


 >>EIP; c016b8f0 <fcntl_getlk64+1a0/1e0>   <=====
 >>eax; d927e000 <_end+18c5ad20/3f9dad20>
 >>ebx; d8410013 <_end+17decd33/3f9dad20>
 >>edx; c1540000 <_end+f1cd20/3f9dad20>
 >>esi; c1561df4 <_end+f3eb14/3f9dad20>
 >>edi; dffe0e80 <_end+1f9bdba0/3f9dad20>
 >>esp; d927fe7c <_end+18c5cb9c/3f9dad20>

Trace; c0161670 <do_execve+80/240>
Trace; c0161bcb <coredump_wait+4b/a0>
Trace; c015dad4 <bd_release+34/50>
Trace; c0162963 <pipe_rdwr_fasync+93/a0>
Trace; c0152e9e <swap_show+8e/140>
Trace; c015335b <sys_swapon+3eb/750>
Trace; c045d657 <ikconfig_config+f97/5ea0>

This architecture has variable length instructions, decoding before eip
is unreliable, take these instructions with a pinch of salt.

Code;  c016b8c5 <fcntl_getlk64+175/1e0>
00000000 <_EIP>:
Code;  c016b8c5 <fcntl_getlk64+175/1e0>
    0:   15 6c dd 5f c0            adc    $0xc05fdd6c,%eax
Code;  c016b8ca <fcntl_getlk64+17a/1e0>
    5:   23 05 64 dd 5f c0         and    0xc05fdd64,%eax
Code;  c016b8d0 <fcntl_getlk64+180/1e0>
    b:   8d 04 82                  lea    (%edx,%eax,4),%eax
Code;  c016b8d3 <fcntl_getlk64+183/1e0>
    e:   89 44 24 10               mov    %eax,0x10(%esp,1)
Code;  c016b8d7 <fcntl_getlk64+187/1e0>
   12:   b8 00 e0 ff ff            mov    $0xffffe000,%eax
Code;  c016b8dc <fcntl_getlk64+18c/1e0>
  17:   21 e0                     and    %esp,%eax
Code;  c016b8de <fcntl_getlk64+18e/1e0>
   19:   ff 40 14                  incl   0x14(%eax)
Code;  c016b8e1 <fcntl_getlk64+191/1e0>
   1c:   8b 74 24 10               mov    0x10(%esp,1),%esi
Code;  c016b8e5 <fcntl_getlk64+195/1e0>
   20:   8b 2e                     mov    (%esi),%ebp
Code;  c016b8e7 <fcntl_getlk64+197/1e0>
   22:   85 ed                     test   %ebp,%ebp
Code;  c016b8e9 <fcntl_getlk64+199/1e0>
   24:   74 2f                     je     55 <_EIP+0x55>
Code;  c016b8eb <fcntl_getlk64+19b/1e0>
   26:   89 44 24 14               mov    %eax,0x14(%esp,1)
Code;  c016b8ef <fcntl_getlk64+19f/1e0>
   2a:   90                        nop

This decode from eip onwards should be reliable

Code;  c016b8f0 <fcntl_getlk64+1a0/1e0>
00000000 <_EIP>:
Code;  c016b8f0 <fcntl_getlk64+1a0/1e0>   <=====
    0:   8b 45 00                  mov    0x0(%ebp),%eax   <=====
Code;  c016b8f3 <fcntl_getlk64+1a3/1e0>
    3:   8d 44 20 00               lea    0x0(%eax,1),%eax
Code;  c016b8f7 <fcntl_getlk64+1a7/1e0>
    7:   8b 7c 24 10               mov    0x10(%esp,1),%edi
Code;  c016b8fb <fcntl_getlk64+1ab/1e0>
    b:   8d 5d 90                  lea    0xffffff90(%ebp),%ebx
Code;  c016b8fe <fcntl_getlk64+1ae/1e0>
    e:   39 7b 78                  cmp    %edi,0x78(%ebx)
Code;  c016b901 <fcntl_getlk64+1b1/1e0>
   11:   75 17                     jne    2a <_EIP+0x2a>
Code;  c016b903 <fcntl_getlk64+1b3/1e0>
   13:   8b                        .byte 0x8b
Code;  c016b904 <fcntl_getlk64+1b4/1e0>
   14:   43                        inc    %ebx

Mar  4 08:19:55 localhost kernel: Call Trace:
Mar  4 08:19:55 localhost kernel:  [<c011c194>] schedule+0x5a4/0x5b0
Mar  4 08:19:55 localhost kernel:  [<c0144c63>] unmap_page_range+0x43/0x70
Mar  4 08:19:55 localhost kernel:  [<c0144e23>] unmap_vmas+0x193/0x1f0
Mar  4 08:19:55 localhost kernel:  [<c0148c20>] exit_mmap+0x70/0x180
Mar  4 08:19:55 localhost kernel:  [<c011dccd>] mmput+0x6d/0xb0
Mar  4 08:19:55 localhost kernel:  [<c0121c3a>] do_exit+0x14a/0x400
Mar  4 08:19:55 localhost kernel:  [<c011a080>] do_page_fault+0x0/0x50c
Mar  4 08:19:55 localhost kernel:  [<c01097e9>] die+0xf9/0x100
Mar  4 08:19:55 localhost kernel:  [<c011a25e>] do_page_fault+0x1de/0x50c
Mar  4 08:19:55 localhost kernel:  [<c0138328>] __lock_page+0xb8/0xd0
Mar  4 08:19:55 localhost kernel:  [<c011d9c0>] 
autoremove_wake_function+0x0/0x50
Mar  4 08:19:55 localhost kernel:  [<c0138baf>] file_read_actor+0xdf/0xf0
Mar  4 08:19:55 localhost kernel:  [<c0138822>] 
do_generic_mapping_read+0x122/0x3d0
Mar  4 08:19:55 localhost kernel:  [<c011a080>] do_page_fault+0x0/0x50c
Mar  4 08:19:55 localhost kernel:  [<c045e063>] error_code+0x2f/0x38
Mar  4 08:19:55 localhost kernel:  [<c016b8f0>] __d_lookup+0x70/0x150
Mar  4 08:19:55 localhost kernel:  [<c0161670>] do_lookup+0x30/0xb0
Mar  4 08:19:55 localhost kernel:  [<c0161bcb>] link_path_walk+0x4db/0x960
Mar  4 08:19:55 localhost kernel:  [<c015dad4>] cp_new_stat64+0x114/0x130
Mar  4 08:19:55 localhost kernel:  [<c0162963>] open_namei+0x83/0x400
Mar  4 08:19:55 localhost kernel:  [<c0152e9e>] filp_open+0x3e/0x70
Mar  4 08:19:55 localhost kernel:  [<c015335b>] sys_open+0x5b/0x90
Mar  4 08:19:55 localhost kernel:  [<c045d657>] syscall_call+0x7/0xb



-- 
    __
   /  `                   	Eric Valette
  /--   __  o _.          	6 rue Paul Le Flem
(___, / (_(_(__         	35740 Pace

Tel: +33 (0)2 99 85 26 76	Fax: +33 (0)2 99 85 26 76
E-mail: eric.valette@free.fr