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SubjectRe: an oops in 2.6-test2 (oops)
On Aug 08, Karol 'grzywacz' Nowak <novaki@poczta.wp.pl> wrote:

>I've noticed a bug in Linux version 2.6-test2 and I'm able to reproduce it. It
>occures while using xmms' "Add directory to playlist". The only module that

I have been getting a few of these too (now with -test3), usually
reproducibles:


ksymoops 2.4.8 on i686 2.6.0-test3. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.6.0-test3/ (default)
-m /boot/System.map-2.6.0-test3 (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.

Error (regular_file): read_ksyms stat /proc/ksyms failed
No modules in ksyms, skipping objects
No ksyms, skipping lsmod
Aug 12 12:58:55 wonderland kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000000
Aug 12 12:58:55 wonderland kernel: c015c80a
Aug 12 12:58:55 wonderland kernel: *pde = 00000000
Aug 12 12:58:55 wonderland kernel: Oops: 0000 [#1]
Aug 12 12:58:55 wonderland kernel: CPU: 0
Aug 12 12:58:55 wonderland kernel: EIP: 0060:[<c015c80a>] Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
Aug 12 12:58:55 wonderland kernel: EFLAGS: 00010282
Aug 12 12:58:55 wonderland kernel: eax: c1539a0c ebx: 0005fdd5 ecx: d4bcb710 edx: 00000000
Aug 12 12:58:55 wonderland kernel: esi: df586a00 edi: c1539a0c ebp: dc753e48 esp: dc753e38
Aug 12 12:58:55 wonderland kernel: ds: 007b es: 007b ss: 0068
Aug 12 12:58:55 wonderland kernel: Stack: d2a61600 0005fdd5 0005fdd5 df586a00 dc753e6c c015cd0b df586a00 c1539a0c
Aug 12 12:58:55 wonderland kernel: 0005fdd5 c1539a0c 0005fdd5 d25ca600 df586a00 dc753e8c c017bc77 df586a00
Aug 12 12:58:55 wonderland kernel: 0005fdd5 d25da030 fffffff4 d2d7d9f8 d2d7d990 dc753eb0 c0152740 d2d7d990
Aug 12 12:58:55 wonderland kernel: Call Trace:
Aug 12 12:58:55 wonderland kernel: [<c015cd0b>] iget_locked+0x4b/0xa0
Aug 12 12:58:55 wonderland kernel: [<c017bc77>] ext3_lookup+0x67/0xc0
Aug 12 12:58:55 wonderland kernel: [<c0152740>] real_lookup+0xc0/0xf0
Aug 12 12:58:55 wonderland kernel: [<c0152984>] do_lookup+0x84/0x90
Aug 12 12:58:55 wonderland kernel: [<c0152d84>] link_path_walk+0x3f4/0x760
Aug 12 12:58:55 wonderland kernel: [<c0153954>] open_namei+0x84/0x3d0
Aug 12 12:58:56 wonderland kernel: [<c013c8c2>] free_pgtables+0x82/0xa0
Aug 12 12:58:56 wonderland kernel: [<c0145f9c>] filp_open+0x3c/0x60
Aug 12 12:58:56 wonderland kernel: [<c0146383>] sys_open+0x53/0x90
Aug 12 12:58:56 wonderland kernel: [<c01090b3>] syscall_call+0x7/0xb
Aug 12 12:58:56 wonderland kernel: Code: 0f 18 02 90 39 59 18 89 c8 74 10 85 d2 89 d1 75 ed 31 c0 83


>>EIP; c015c80a <find_inode_fast+1a/60> <=====

>>eax; c1539a0c <__crc_lock_may_read+ec59e/101eac>
>>ecx; d4bcb710 <__crc_xfrm_state_update+ef9/5bd312>
>>esi; df586a00 <__crc_inet_family_ops+bcd4b/142f72>
>>edi; c1539a0c <__crc_lock_may_read+ec59e/101eac>
>>ebp; dc753e48 <__crc_zlib_deflateInit2_+59274/71ff7>
>>esp; dc753e38 <__crc_zlib_deflateInit2_+59264/71ff7>

Trace; c015cd0b <iget_locked+4b/a0>
Trace; c017bc77 <ext3_lookup+67/c0>
Trace; c0152740 <real_lookup+c0/f0>
Trace; c0152984 <do_lookup+84/90>
Trace; c0152d84 <link_path_walk+3f4/760>
Trace; c0153954 <open_namei+84/3d0>
Trace; c013c8c2 <free_pgtables+82/a0>
Trace; c0145f9c <filp_open+3c/60>
Trace; c0146383 <sys_open+53/90>
Trace; c01090b3 <syscall_call+7/b>

Code; c015c80a <find_inode_fast+1a/60>
00000000 <_EIP>:
Code; c015c80a <find_inode_fast+1a/60> <=====
0: 0f 18 02 prefetchnta (%edx) <=====
Code; c015c80d <find_inode_fast+1d/60>
3: 90 nop
Code; c015c80e <find_inode_fast+1e/60>
4: 39 59 18 cmp %ebx,0x18(%ecx)
Code; c015c811 <find_inode_fast+21/60>
7: 89 c8 mov %ecx,%eax
Code; c015c813 <find_inode_fast+23/60>
9: 74 10 je 1b <_EIP+0x1b>
Code; c015c815 <find_inode_fast+25/60>
b: 85 d2 test %edx,%edx
Code; c015c817 <find_inode_fast+27/60>
d: 89 d1 mov %edx,%ecx
Code; c015c819 <find_inode_fast+29/60>
f: 75 ed jne fffffffe <_EIP+0xfffffffe>
Code; c015c81b <find_inode_fast+2b/60>
11: 31 c0 xor %eax,%eax
Code; c015c81d <find_inode_fast+2d/60>
13: 83 00 00 addl $0x0,(%eax)


1 warning and 1 error issued. Results may not be reliable.

--
ciao, |
Marco | [1262 arSPQOzWtTbXY]
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