On Sun, 20 Jun 2004, Heinz Mauelshagen wrote:
> Alex,
> could you run that through ksymoops to get a backtrace ?
> Regards,
> Heinz -- The LVM Guy --
Sorry for the "school-boy-errors" of not giving my initial post a title or
running the oops through ksymoops.
Ksymoops was run as follows:
ksymoops -k /var/log/ksymoops/20040618073816.ksyms \
-l /var/log/ksymoops/20040618073816.modules \
-o /lib/modules/2.4.26-686-smp-lvm-vfslock/ \
-m /boot/System.map-2.4.26-686-smp-lvm-vfslock \
-i ~/oops
Which gave:
---8<---
ksymoops 2.4.5 on i686 2.4.26-686-smp-lvm-vfslock. Options used
-V (default)
-k /var/log/ksymoops/20040618073816.ksyms (specified)
-l /var/log/ksymoops/20040618073816.modules (specified)
-o /lib/modules/2.4.26-686-smp-lvm-vfslock/ (specified)
-m /boot/System.map-2.4.26-686-smp-lvm-vfslock (specified)
-i
Warning (map_ksym_to_module): cannot match loaded module ext3 to a unique module object. Trace may not be reliable.
Warning (map_ksym_to_module): cannot match loaded module cciss to a unique module object. Trace may not be reliable.
Jun 18 07:39:03 falcon kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000000
Jun 18 07:39:03 falcon kernel: f8855b17
Jun 18 07:39:03 falcon kernel: *pde = 1236b001
Jun 18 07:39:03 falcon kernel: Oops: 0000
Jun 18 07:39:03 falcon kernel: CPU: 3
Jun 18 07:39:03 falcon kernel: EIP: 0010:[ide-cd:__insmod_ide-cd_O/lib/modules/2.4.26-686-smp-lvm-vfslock/ke+-2135273/96] Tainted: P
Jun 18 07:39:03 falcon kernel: EFLAGS: 00010202
Jun 18 07:39:03 falcon kernel: eax: 00000000 ebx: f8ac3260 ecx: 00000000 edx: 00000000
Jun 18 07:39:03 falcon kernel: esi: 00402400 edi: f724aa00 ebp: 00006804 esp: c43d7dd0
Jun 18 07:39:03 falcon kernel: ds: 0018 es: 0018 ss: 0018
Jun 18 07:39:03 falcon kernel: Process kupdated (pid: 9, stackpage=c43d7000)
Jun 18 07:39:03 falcon kernel: Stack: f724aa00 f724ab70 f7c92970 00200000 00000080 00000002 00000000 00000000
Jun 18 07:39:03 falcon kernel: f88526d1 c43d7e2e c43d7e30 00402380 f724aa00 00003a02 eda084a0 00000080
Jun 18 07:39:03 falcon kernel: 00200000 c7d80f80 000c00b0 f7c92800 f7c89000 00402380 00000000 68040000
Jun 18 07:39:03 falcon kernel: Call Trace: [ide-cd:__insmod_ide-cd_O/lib/modules/2.4.26-686-smp-lvm-vfslock/ke+-2148655/96] [ide-cd:__insmod_ide-cd_O/lib/modules/2.4.26-686-smp-lvm-vfslock/ke+-2148425/96] [generic_make_request+288/304] [submit_bh+86/224] [write_locked_buffers+32/44]
Jun 18 07:39:03 falcon kernel: Code: 8b 01 39 d9 74 37 39 71 08 75 ef 66 39 69 0c 75 e9 83 7c 24
Using defaults from ksymoops -t elf32-i386 -a i386
>>ebx; f8ac3260 <[ide-cd].data.end+5d281/13e021>
>>esi; 00402400 Before first symbol
>>edi; f724aa00 <_end+36f068d4/384d7ed4>
>>ebp; 00006804 Before first symbol
>>esp; c43d7dd0 <_end+4093ca4/384d7ed4>
Code; 00000000 Before first symbol
00000000 <_EIP>:
Code; 00000000 Before first symbol
0: 8b 01 mov (%ecx),%eax
Code; 00000002 Before first symbol
2: 39 d9 cmp %ebx,%ecx
Code; 00000004 Before first symbol
4: 74 37 je 3d <_EIP+0x3d> 0000003d Before first symbol
Code; 00000006 Before first symbol
6: 39 71 08 cmp %esi,0x8(%ecx)
Code; 00000009 Before first symbol
9: 75 ef jne fffffffa <_EIP+0xfffffffa> fffffffa <END_OF_CODE+741a4df/????>
Code; 0000000b Before first symbol
b: 66 39 69 0c cmp %bp,0xc(%ecx)
Code; 0000000f Before first symbol
f: 75 e9 jne fffffffa <_EIP+0xfffffffa> fffffffa <END_OF_CODE+741a4df/????>
Code; 00000011 Before first symbol
11: 83 7c 24 00 00 cmpl $0x0,0x0(%esp,1)
2 warnings issued. Results may not be reliable.
---8<---
Without the "-i" flag to ksymoops there were 6 warnings with it only 2
warnings so I have posted the "-i" version here. The output was the same
between the two runs except for the warnings.
Does the fact that there are warnings make my ksymoops worthless?
I don't understand why there are warnings... is it because some modules
are loaded from an initrd? - they should be identical to the modules under
/lib/modules/`uname -r` though!
Am I right in thinking that this ksymoops indicates a problem in the
ide-cd module? ...
If so sorry for wasting your time on the linux-lvm list.
If not any ideas what it means?
Thanks (in advance) for your help
Alex Owen
----------------------------------------------------------------
Dr Richard Alexander Owen Unix System Administrator
The Computer Centre E-mail: rao3@le.ac.uk
University of Leicester Tel: (0116) 2525133
University Road Fax: (0116) 2525027
Leicester LE1 7RH
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