Strange Oops in free_wait()/do_select()

Martin Buck (martin.buck@ascom.ch)
Thu, 19 Apr 2001 15:25:33 +0200

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I'm getting strange Oopses with 2.2.17 on an AMD Athlon 1.2 GHz machine.
They all happen in about the same place in free_wait() called by
do_select(). I don't see a special pattern when I look at the failing
addresses, but then, I'm not a kernel expert...

The strange thing is that exactly this kernel ran fine for months on a
Pentium II/300 machine. I then copied the whole disk from the old to the
new machine and started getting the Oopses (every few days). Differences
between both machines: CPUs/motherboards of course, 512MB RAM instead of
256MB, SCSI instead of IDE disk.

I first suspected memory or power supply problems, but memtest86 ran fine
for 2 days. Also, in those cases, I would expect random crashes in
different places, not always in do_select().

Any hints what I could try next? Hardware/software problem? More
information required? I could probably dig out a few more of those Oopses
from backup, if that helps. Here are the ones I currently have:

---------------------

ksymoops 2.3.4 on i686 2.2.17. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.2.17/ (default)
-m /boot/System.map-2.2.17 (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.

Mar 21 01:02:46 tux kernel: Unable to handle kernel paging request at virtual address f6f300b4
Mar 21 01:02:46 tux kernel: current->tss.cr3 = 1c3a1000, %%cr3 = 1c3a1000
Mar 21 01:02:46 tux kernel: *pde = 00000000
Mar 21 01:02:46 tux kernel: Oops: 0000
Mar 21 01:02:46 tux kernel: CPU: 0
Mar 21 01:02:46 tux kernel: EIP: 0010:[free_wait+44/116]
Mar 21 01:02:46 tux kernel: EFLAGS: 00010087
Mar 21 01:02:46 tux kernel: eax: 8200000b ebx: f6f300b0 ecx: d6f30000 edx: c5bdff98
Mar 21 01:02:46 tux kernel: esi: f6f300ac edi: d6f30000 ebp: 00000287 esp: c5bdfeec
Mar 21 01:02:46 tux kernel: ds: 0018 es: 0018 ss: 0018
Mar 21 01:02:46 tux kernel: Process Xvnc (pid: 14195, process nr: 54, stackpage=c5bdf000)
Mar 21 01:02:46 tux kernel: Stack: 00000800 0000000c 00000010 00000000 00000000 c012e047 d6f30000 00000000
Mar 21 01:02:46 tux kernel: 0000000c c012e018 00000004 00000010 c3e26dc0 00000000 00000001 d81220b4
Mar 21 01:02:46 tux kernel: bffff990 c5bde000 c5bde000 0000464c 00000000 d6f30000 c99b880c c5bdff68
Mar 21 01:02:46 tux kernel: Call Trace: [do_select+487/512] [do_select+440/512] [sys_select+881/1176] [sys_select+993/1176] [sys_gettimeofday+32/148] [sys_gettimeofday+0/148] [system_call+52/56]
Mar 21 01:02:46 tux kernel: Code: 8b 4b 04 89 ca 8b 41 04 39 d8 74 09 89 c2 8b 42 04 39 d8 75

Code; 00000000 Before first symbol
00000000 <_EIP>:
Code; 00000000 Before first symbol
0: 8b 4b 04 mov 0x4(%ebx),%ecx
Code; 00000003 Before first symbol
3: 89 ca mov %ecx,%edx
Code; 00000005 Before first symbol
5: 8b 41 04 mov 0x4(%ecx),%eax
Code; 00000008 Before first symbol
8: 39 d8 cmp %ebx,%eax
Code; 0000000a Before first symbol
a: 74 09 je 15 <_EIP+0x15> 00000015 Before first symbol
Code; 0000000c Before first symbol
c: 89 c2 mov %eax,%edx
Code; 0000000e Before first symbol
e: 8b 42 04 mov 0x4(%edx),%eax
Code; 00000011 Before first symbol
11: 39 d8 cmp %ebx,%eax
Code; 00000013 Before first symbol
13: 75 00 jne 15 <_EIP+0x15> 00000015 Before first symbol

Mar 29 13:39:48 tux kernel: Unable to handle kernel paging request at virtual address 90000003
Mar 29 13:39:48 tux kernel: current->tss.cr3 = 1dc86000, %%cr3 = 1dc86000
Mar 29 13:39:48 tux kernel: *pde = 00000000
Mar 29 13:39:48 tux kernel: Oops: 0000
Mar 29 13:39:48 tux kernel: CPU: 0
Mar 29 13:39:48 tux kernel: EIP: 0010:[free_wait+49/116]
Mar 29 13:39:48 tux kernel: EFLAGS: 00010087
Mar 29 13:39:48 tux kernel: eax: 00000001 ebx: c3760000 ecx: 8fffffff edx: 8fffffff
Mar 29 13:39:48 tux kernel: esi: c375fffc edi: c3760000 ebp: 00000287 esp: ddc85eec
Mar 29 13:39:48 tux kernel: ds: 0018 es: 0018 ss: 0018
Mar 29 13:39:48 tux kernel: Process ntpd (pid: 309, process nr: 35, stackpage=ddc85000)
Mar 29 13:39:48 tux kernel: Stack: 00000080 00000008 00000004 c48872d8 00000000 c012e047 c3760000 00000000
Mar 29 13:39:48 tux kernel: 00000008 c012e018 00000001 00000004 c48872d8 00000000 00000001 c48872d4
Mar 29 13:39:48 tux kernel: bffffbc0 ddc84000 ddc84000 7fffffff 00000000 c3760000 dfe735a0 ddc85ec8
Mar 29 13:39:48 tux kernel: Call Trace: [do_select+487/512] [do_select+440/512] [sys_select+881/1176] [sys_select+993/1176] [sys_gettimeofday+32/148] [system_call+52/56]
Mar 29 13:39:48 tux kernel: Code: 8b 41 04 39 d8 74 09 89 c2 8b 42 04 39 d8 75 f7 89 4a 04 55

Code; 00000000 Before first symbol
00000000 <_EIP>:
Code; 00000000 Before first symbol
0: 8b 41 04 mov 0x4(%ecx),%eax
Code; 00000003 Before first symbol
3: 39 d8 cmp %ebx,%eax
Code; 00000005 Before first symbol
5: 74 09 je 10 <_EIP+0x10> 00000010 Before first symbol
Code; 00000007 Before first symbol
7: 89 c2 mov %eax,%edx
Code; 00000009 Before first symbol
9: 8b 42 04 mov 0x4(%edx),%eax
Code; 0000000c Before first symbol
c: 39 d8 cmp %ebx,%eax
Code; 0000000e Before first symbol
e: 75 f7 jne 7 <_EIP+0x7> 00000007 Before first symbol
Code; 00000010 Before first symbol
10: 89 4a 04 mov %ecx,0x4(%edx)
Code; 00000013 Before first symbol
13: 55 push %ebp

Mar 29 15:20:03 tux kernel: Unable to handle kernel paging request at virtual address e5aa8084
Mar 29 15:20:03 tux kernel: current->tss.cr3 = 1e4e0000, %%cr3 = 1e4e0000
Mar 29 15:20:03 tux kernel: *pde = 00000000
Mar 29 15:20:03 tux kernel: Oops: 0000
Mar 29 15:20:03 tux kernel: CPU: 0
Mar 29 15:20:03 tux kernel: EIP: 0010:[free_wait+44/116]
Mar 29 15:20:03 tux kernel: EFLAGS: 00010083
Mar 29 15:20:03 tux kernel: eax: 82000008 ebx: e5aa8080 ecx: c5aa8000 edx: de4dff98
Mar 29 15:20:03 tux kernel: esi: e5aa807c edi: c5aa8000 ebp: 00000283 esp: de4dfeec
Mar 29 15:20:03 tux kernel: ds: 0018 es: 0018 ss: 0018
Mar 29 15:20:03 tux kernel: Process nmbd (pid: 287, process nr: 28, stackpage=de4df000)
Mar 29 15:20:03 tux kernel: Stack: 00001000 0000000d 00000080 00000000 00000000 c012e047 c5aa8000 00000000
Mar 29 15:20:03 tux kernel: 0000000d c012e018 00000020 00000080 dffce700 00000000 00000020 dffce680
Mar 29 15:20:03 tux kernel: bffffcbc de4de000 de4de000 0000039d 00000000 c5aa8000 ded388c0 de4dfec8
Mar 29 15:20:03 tux kernel: Call Trace: [do_select+487/512] [do_select+440/512] [sys_select+881/1176] [sys_select+993/1176] [error_code+45/52] [system_call+52/56]
Mar 29 15:20:03 tux kernel: Code: 8b 4b 04 89 ca 8b 41 04 39 d8 74 09 89 c2 8b 42 04 39 d8 75

Apr 11 13:57:44 tux kernel: Unable to handle kernel paging request at virtual address 90000003
Apr 11 13:57:44 tux kernel: current->tss.cr3 = 133ac000, %%cr3 = 133ac000
Apr 11 13:57:44 tux kernel: *pde = 00000000
Apr 11 13:57:44 tux kernel: Oops: 0000
Apr 11 13:57:44 tux kernel: CPU: 0
Apr 11 13:57:44 tux kernel: EIP: 0010:[free_wait+49/116]
Apr 11 13:57:44 tux kernel: EFLAGS: 00010087
Apr 11 13:57:44 tux kernel: eax: 00000001 ebx: ca3a4000 ecx: 8fffffff edx: 8fffffff
Apr 11 13:57:44 tux kernel: esi: ca3a3ffc edi: ca3a4000 ebp: 00000287 esp: d52a7eec
Apr 11 13:57:44 tux kernel: ds: 0018 es: 0018 ss: 0018
Apr 11 13:57:44 tux kernel: Process Xvnc (pid: 16646, process nr: 194, stackpage=d52a7000)
Apr 11 13:57:44 tux kernel: Stack: 00002000 0000000e 00000010 00000000 00000000 c012e047 ca3a4000 00000000
Apr 11 13:57:44 tux kernel: 0000000e c012e018 00000004 00000010 ce3d45a0 00000000 00000001 c5126614
Apr 11 13:57:44 tux kernel: bffff990 d52a6000 d52a6000 00004650 00000000 ca3a4000 0825d738 00000020
Apr 11 13:57:44 tux kernel: Call Trace: [do_select+487/512] [do_select+440/512] [sys_select+881/1176] [sys_select+993/1176] [sys_gettimeofday+32/148] [system_call+52/56]
Apr 11 13:57:44 tux kernel: Code: 8b 41 04 39 d8 74 09 89 c2 8b 42 04 39 d8 75 f7 89 4a 04 55

Apr 17 16:57:59 tux kernel: Unable to handle kernel paging request at virtual address e33b40c4
Apr 17 16:57:59 tux kernel: current->tss.cr3 = 03689000, %%cr3 = 03689000
Apr 17 16:57:59 tux kernel: *pde = 00000000
Apr 17 16:57:59 tux kernel: Oops: 0000
Apr 17 16:57:59 tux kernel: CPU: 0
Apr 17 16:57:59 tux kernel: EIP: 0010:[free_wait+44/116]
Apr 17 16:57:59 tux kernel: EFLAGS: 00010083
Apr 17 16:57:59 tux kernel: eax: 9080000c ebx: e33b40c0 ecx: db3b4000 edx: de7a5f98
Apr 17 16:57:59 tux kernel: esi: e33b40bc edi: db3b4000 ebp: 00000283 esp: de7a5eec
Apr 17 16:57:59 tux kernel: ds: 0018 es: 0018 ss: 0018
Apr 17 16:57:59 tux kernel: Process Xvnc (pid: 13658, process nr: 118, stackpage=de7a5000)
Apr 17 16:57:59 tux kernel: Stack: 00001000 0000000d 00000010 00000000 00000000 c012e047 db3b4000 00000000
Apr 17 16:57:59 tux kernel: 0000000d c012e018 00000004 00000010 d8b2da00 00000000 00000001 cd2b0cf4
Apr 17 16:57:59 tux kernel: bffff990 de7a4000 de7a4000 000045a1 00000000 db3b4000 0847ef58 00000020
Apr 17 16:57:59 tux kernel: Call Trace: [do_select+487/512] [do_select+440/512] [sys_select+881/1176] [sys_select+993/1176] [sys_gettimeofday+32/148] [sys_gettimeofday+0/148] [system_call+52/56]
Apr 17 16:57:59 tux kernel: Code: 8b 4b 04 89 ca 8b 41 04 39 d8 74 09 89 c2 8b 42 04 39 d8 75

1 warning issued. Results may not be reliable.

Thanks,
Martin
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Next message: Jens Axboe: "Re: block devices don't work without plugging in 2.4.3"
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