2.4.19-pre10 oops

2.4.19-pre10 oops

[Kurt Roeckx]

I'm using 2.4.19-pre10, and got an oops.  I sometimes also get a lockup, and have no idea why.

This oops happened when reading my lkml mailbox.  Ksymoops output:

Warning (compare_maps): ksyms_base symbol vmalloc_to_page_R__ver_vmalloc_to_page not found in System.map.  Ignoring ksyms_base entry
Unable to handle kernel NULL pointer dereference at virtual address 00000000
c013f35e
*pde = 00000000
Oops: 0002
CPU:    0
EIP:    0010:[<c013f35e>]    Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010286
eax: c09abb94   ebx: c09abb7c   ecx: 00000000   edx: c25927f0
esi: c09abb64   edi: c9c606a0   ebp: 00000f53   esp: c1237f60
ds: 0018   es: 0018   ss: 0018
Process kswapd (pid: 5, stackpage=c1237000)
Stack: 0000000c 000001d0 00000020 00000006 c013f64b 000048ba c0129a51 00000006
       000001d0 00000006 000001d0 c028cfd4 00000000 c028cfd4 c0129a9c 00000020
       c028cfd4 00000001 c1236000 c0129b33 c028cf20 00000000 c1236249 0008e000
Call Trace: [<c013f64b>] [<c0129a51>] [<c0129a9c>] [<c0129b33>] [<c0129b8e>]
   [<c0129c9d>] [<c0106efc>]
Code: 89 11 89 46 30 89 40 04 8b 46 4c 85 c0 74 13 8b 40 14 85 c0

>>EIP; c013f35e <prune_dcache+9e/138>   <=====

>>eax; c09abb94 <_end+69cfb0/c52641c>
>>ebx; c09abb7c <_end+69cf98/c52641c>
>>edx; c25927f0 <_end+2283c0c/c52641c>
>>esi; c09abb64 <_end+69cf80/c52641c>
>>edi; c9c606a0 <_end+9951abc/c52641c>
>>ebp; 00000f53 Before first symbol
>>esp; c1237f60 <_end+f2937c/c52641c>

Trace; c013f64b <shrink_dcache_memory+1b/34>
Trace; c0129a51 <shrink_caches+69/80>
Trace; c0129a9c <try_to_free_pages+34/54>
Trace; c0129b33 <kswapd_balance_pgdat+43/8c>
Trace; c0129b8e <kswapd_balance+12/28>
Trace; c0129c9d <kswapd+99/bc>
Trace; c0106efc <kernel_thread+28/38>

Code;  c013f35e <prune_dcache+9e/138>
00000000 <_EIP>:
Code;  c013f35e <prune_dcache+9e/138>   <=====
   0:   89 11                     mov    %edx,(%ecx)   <=====
Code;  c013f360 <prune_dcache+a0/138>
   2:   89 46 30                  mov    %eax,0x30(%esi)
Code;  c013f363 <prune_dcache+a3/138>
   5:   89 40 04                  mov    %eax,0x4(%eax)
Code;  c013f366 <prune_dcache+a6/138>
   8:   8b 46 4c                  mov    0x4c(%esi),%eax
Code;  c013f369 <prune_dcache+a9/138>
   b:   85 c0                     test   %eax,%eax
Code;  c013f36b <prune_dcache+ab/138>
   d:   74 13                     je     22 <_EIP+0x22> c013f380 <prune_dcache+c0/138>
Code;  c013f36d <prune_dcache+ad/138>
   f:   8b 40 14                  mov    0x14(%eax),%eax
Code;  c013f370 <prune_dcache+b0/138>
  12:   85 c0                     test   %eax,%eax

After that I got a few times "kernel BUG at dcache.c:345"


Kurt

2.4.19-pre10 Oops

[Jeronimo Pellegrini]

Hi.

Got an Oops a few minutes ago with plain 2.4.19-pre10, compiled for
Athlon/K7. If you need more info, tell me!

J.


ksymoops 2.4.5 on i686 2.4.19-pre10.  Options used
     -V (default)
     -k /proc/ksyms (default)
     -l /proc/modules (default)
     -o /lib/modules/2.4.19-pre10/ (default)
     -m /boot/System.map-2.4.19-pre10 (default)

Warning: You did not tell me where to find symbol information.  I will
assume that the log matches the kernel and modules that are running
right now and I'll use the default options above for symbol resolution.
If the current kernel and/or modules do not match the log, you can get
more accurate output by telling me the kernel version and where to find
map, modules, ksyms etc.  ksymoops -h explains the options.

Jun 20 15:15:56 localhost kernel: Unable to handle kernel paging request at virtual address 10854a66
Jun 20 15:15:56 localhost kernel: bfa95f90
Jun 20 15:15:56 localhost kernel: *pde = 00000000
Jun 20 15:15:56 localhost kernel: Oops: 0002
Jun 20 15:15:56 localhost kernel: CPU:    0
Jun 20 15:15:56 localhost kernel: EIP:    0010:[<bfa95f90>]    Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
Jun 20 15:15:56 localhost kernel: EFLAGS: 00010202
Jun 20 15:15:56 localhost kernel: eax: 10854a66   ebx: c38d6c40   ecx: c38d6000   edx: 10854a66
Jun 20 15:15:56 localhost kernel: esi: cffe8800   edi: ca7ae000   ebp: 00000002   esp: c3e4be90
Jun 20 15:15:56 localhost kernel: ds: 0018   es: 0018   ss: 0018
Jun 20 15:15:56 localhost kernel: Process ps (pid: 10617, stackpage=c3e4b000)
Jun 20 15:15:56 localhost kernel: Stack: c01460de c38d6c40 00004300 c014e955 00004300 ca7ae000 c543f640 c543f640
Jun 20 15:15:56 localhost kernel:        c014efd4 cffe8800 ca7ae000 00000002 c12ce440 c543f640 c543f640 c12cd1c0
Jun 20 15:15:56 localhost kernel:        ffffffff c543f6a1 c014dc49 c12ce440 c543f640 fffffff4 c12ce440 c013c7e3
Jun 20 15:15:56 localhost kernel: Call Trace: [get_empty_inode+142/160] [proc_pid_make_inode+21/192] [proc_pid_lookup+356/464] [proc_root_lookup+57/80] [real_lookup+83/192]
Jun 20 15:15:56 localhost kernel: Code:  Bad EIP value.


>>EIP; bfa95f90 Before first symbol   <=====

>>eax; 10854a66 Before first symbol
>>ebx; c38d6c40 <_end+358919c/1050a55c>
>>ecx; c38d6000 <_end+358855c/1050a55c>
>>edx; 10854a66 Before first symbol
>>esi; cffe8800 <_end+fc9ad5c/1050a55c>
>>edi; ca7ae000 <_end+a46055c/1050a55c>
>>esp; c3e4be90 <_end+3afe3ec/1050a55c>


1 warning issued.  Results may not be reliable.

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