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SubjectRe: Deadlock in kernel on USB shutdown
Hi Greg,

Greg KH wrote:

>
>When the seg-fault happens, I am guessing that an oops message is sent
>to the kernel log. Look at 'dmesg'. Run that oops through ksymoops.
>See Documentation/oops-tracing.txt for more info on oopses and how to
>get info from them.
>
>thanks,
>
>greg k-h
>
Sorry for the delay.

I found a lot of oopses and I managed to separate them in two files
(attached). Each of the files correspond approx. to the time when I had
the 2 seg-faults.

Thanks a lot for all your help Greg. It is really appreciated.

Happy New Year!

Roger Leblanc

ksymoops 2.4.3 on i686 2.4.17. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.17/ (default)
-m /usr/src/linux/System.map (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.

Jan 2 21:00:23 roger kernel: <1>Unable to handle kernel paging request at virtual address a1ae3ae0
Jan 2 21:00:23 roger kernel: e614b46e
Jan 2 21:00:23 roger kernel: Oops: 0000
Jan 2 21:00:23 roger kernel: CPU: 0
Jan 2 21:00:23 roger kernel: EIP: 0010:[scanner:__insmod_scanner_O/lib/modules/2.4.17/kernel/drivers/usb/sc+-41200530/96] Not tainted
Jan 2 21:00:23 roger kernel: EIP: 0010:[<e614b46e>] Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
Jan 2 21:00:23 roger kernel: EFLAGS: 00010282
Jan 2 21:00:23 roger kernel: eax: c02b1466 ebx: dcd755a0 ecx: c031ade8 edx: 00000000
Jan 2 21:00:23 roger kernel: esi: e7ff91e0 edi: dcd75480 ebp: e252dba0 esp: e08fbf3c
Jan 2 21:00:23 roger kernel: ds: 0018 es: 0018 ss: 0018
Jan 2 21:00:23 roger kernel: Process mozilla-bin (pid: 1986, stackpage=e08fb000)
Jan 2 21:00:23 roger kernel: Stack: c01ff4b0 dcd755a0 dcd75480 c01ffa40 dcd755a0 ffffffff e517f8c0 00000000
Jan 2 21:00:23 roger kernel: e517f8c0 c01344ce dcd75480 e517f8c0 000080d4 00000014 09266be0 bf5ff4b4
Jan 2 21:00:23 roger kernel: e517f8c0 e517f8c0 00000000 bf5ff404 c013332d e517f8c0 e2745580 00000000
Jan 2 21:00:23 roger kernel: Call Trace: [sock_release+16/96] [sock_close+48/64] [fput+78/240] [filp_close+141/160] [sys_close+91/112]
Jan 2 21:00:23 roger kernel: Call Trace: [<c01ff4b0>] [<c01ffa40>] [<c01344ce>] [<c013332d>] [<c013339b>]
Jan 2 21:00:23 roger kernel: [<c0106f1b>]
Jan 2 21:00:23 roger kernel: Code: 33 3c 7e b8 33 3c 7e b8 33 3c 0a 00 00 00 00 10 00 00 00 00

>>EIP; e614b46e <_end+25e04bfa/2851978c> <=====
Trace; c01ff4b0 <sock_release+10/60>
Trace; c01ffa40 <sock_close+30/40>
Trace; c01344ce <fput+4e/f0>
Trace; c013332c <filp_close+8c/a0>
Trace; c013339a <sys_close+5a/70>
Trace; c0106f1a <system_call+32/38>
Code; e614b46e <_end+25e04bfa/2851978c>
00000000 <_EIP>:
Code; e614b46e <_end+25e04bfa/2851978c> <=====
0: 33 3c 7e xor (%esi,%edi,2),%edi <=====
Code; e614b470 <_end+25e04bfc/2851978c>
3: b8 33 3c 7e b8 mov $0xb87e3c33,%eax
Code; e614b476 <_end+25e04c02/2851978c>
8: 33 3c 0a xor (%edx,%ecx,1),%edi
Code; e614b478 <_end+25e04c04/2851978c>
b: 00 00 add %al,(%eax)
Code; e614b47a <_end+25e04c06/2851978c>
d: 00 00 add %al,(%eax)
Code; e614b47c <_end+25e04c08/2851978c>
f: 10 00 adc %al,(%eax)

Jan 2 21:00:23 roger kernel: <1>Unable to handle kernel paging request at virtual address a8b4e5e0
Jan 2 21:00:23 roger kernel: e614b46e
Jan 2 21:00:23 roger kernel: Oops: 0000
Jan 2 21:00:23 roger kernel: CPU: 0
Jan 2 21:00:23 roger kernel: EIP: 0010:[scanner:__insmod_scanner_O/lib/modules/2.4.17/kernel/drivers/usb/sc+-41200530/96] Not tainted
Jan 2 21:00:23 roger kernel: EIP: 0010:[<e614b46e>] Not tainted
Jan 2 21:00:23 roger kernel: EFLAGS: 00010293
Jan 2 21:00:23 roger kernel: eax: c02b1466 ebx: e05aab20 ecx: c031ade8 edx: 00000000
Jan 2 21:00:23 roger kernel: esi: e7ff91e0 edi: e05aaa00 ebp: e06d28a0 esp: e17d7e48
Jan 2 21:00:23 roger kernel: ds: 0018 es: 0018 ss: 0018
Jan 2 21:00:23 roger kernel: Process mozilla-bin (pid: 1966, stackpage=e17d7000)
Jan 2 21:00:23 roger kernel: Stack: c01ff4b0 e05aab20 e05aaa00 c01ffa40 e05aab20 ffffffff e04b5ce0 00000000
Jan 2 21:00:23 roger kernel: e04b5ce0 c01344ce e05aaa00 e04b5ce0 e17d4bfc e3679960 e7ffbce4 e3679960
Jan 2 21:00:23 roger kernel: 00007fff e04b5ce0 00000000 00000011 c013332d e04b5ce0 e2745580 00000000
Jan 2 21:00:23 roger kernel: Call Trace: [sock_release+16/96] [sock_close+48/64] [fput+78/240] [filp_close+141/160] [put_files_struct+77/208]
Jan 2 21:00:23 roger kernel: Call Trace: [<c01ff4b0>] [<c01ffa40>] [<c01344ce>] [<c013332d>] [<c011881d>]
Jan 2 21:00:23 roger kernel: [<c011901f>] [<c010ac98>] [<c0106dc4>] [<c013bf1a>] [<c01133c9>] [<c0106f54>]
Warning (Oops_read): Code line not seen, dumping what data is available

>>EIP; e614b46e <_end+25e04bfa/2851978c> <=====
Trace; c01ff4b0 <sock_release+10/60>
Trace; c01ffa40 <sock_close+30/40>
Trace; c01344ce <fput+4e/f0>
Trace; c013332c <filp_close+8c/a0>
Trace; c011881c <put_files_struct+4c/d0>
Trace; c011901e <do_exit+10e/240>
Trace; c010ac98 <call_do_IRQ+6/e>
Trace; c0106dc4 <do_signal+244/2b0>
Trace; c013bf1a <pipe_write+20a/270>
Trace; c01133c8 <schedule+458/510>
Trace; c0106f54 <signal_return+14/18>


2 warnings issued. Results may not be reliable.
ksymoops 2.4.3 on i686 2.4.17. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.17/ (default)
-m /usr/src/linux/System.map (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.

Jan 2 21:00:38 roger kernel: <1>Unable to handle kernel paging request at virtual address aeed88e0
Jan 2 21:00:38 roger kernel: e614b46e
Jan 2 21:00:38 roger kernel: Oops: 0000
Jan 2 21:00:38 roger kernel: CPU: 0
Jan 2 21:00:38 roger kernel: EIP: 0010:[scanner:__insmod_scanner_O/lib/modules/2.4.17/kernel/drivers/usb/sc+-41200530/96] Not tainted
Jan 2 21:00:38 roger kernel: EIP: 0010:[<e614b46e>] Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
Jan 2 21:00:38 roger kernel: EFLAGS: 00013297
Jan 2 21:00:38 roger kernel: eax: c02b1466 ebx: e376fca0 ecx: c031ade8 edx: 00000000
Jan 2 21:00:38 roger kernel: esi: e7ff91e0 edi: e376fb80 ebp: e3729440 esp: e5099f3c
Jan 2 21:00:38 roger kernel: ds: 0018 es: 0018 ss: 0018
Jan 2 21:00:38 roger kernel: Process X (pid: 1628, stackpage=e5099000)
Jan 2 21:00:38 roger kernel: Stack: c01ff4b0 e376fca0 e376fb80 c01ffa40 e376fca0 ffffffff e517f440 00000000
Jan 2 21:00:38 roger kernel: e517f440 c01344ce e376fb80 e517f440 0000000c e376fca0 e376fca0 0000000a
Jan 2 21:00:38 roger kernel: e517f440 e517f440 00000000 bffff758 c013332d e517f440 e6de76c0 00000000
Jan 2 21:00:38 roger kernel: Call Trace: [sock_release+16/96] [sock_close+48/64] [fput+78/240] [filp_close+141/160] [sys_close+91/112]
Jan 2 21:00:38 roger kernel: Call Trace: [<c01ff4b0>] [<c01ffa40>] [<c01344ce>] [<c013332d>] [<c013339b>]
Jan 2 21:00:38 roger kernel: [<c0106f1b>]
Jan 2 21:00:38 roger kernel: Code: 33 3c 7e b8 33 3c 7e b8 33 3c 0a 00 00 00 00 10 00 00 00 00

>>EIP; e614b46e <_end+25e04bfa/2851978c> <=====
Trace; c01ff4b0 <sock_release+10/60>
Trace; c01ffa40 <sock_close+30/40>
Trace; c01344ce <fput+4e/f0>
Trace; c013332c <filp_close+8c/a0>
Trace; c013339a <sys_close+5a/70>
Trace; c0106f1a <system_call+32/38>
Code; e614b46e <_end+25e04bfa/2851978c>
00000000 <_EIP>:
Code; e614b46e <_end+25e04bfa/2851978c> <=====
0: 33 3c 7e xor (%esi,%edi,2),%edi <=====
Code; e614b470 <_end+25e04bfc/2851978c>
3: b8 33 3c 7e b8 mov $0xb87e3c33,%eax
Code; e614b476 <_end+25e04c02/2851978c>
8: 33 3c 0a xor (%edx,%ecx,1),%edi
Code; e614b478 <_end+25e04c04/2851978c>
b: 00 00 add %al,(%eax)
Code; e614b47a <_end+25e04c06/2851978c>
d: 00 00 add %al,(%eax)
Code; e614b47c <_end+25e04c08/2851978c>
f: 10 00 adc %al,(%eax)

Jan 2 21:00:38 roger kernel: <1>Unable to handle kernel paging request at virtual address b21b72a0
Jan 2 21:00:38 roger kernel: e614b46e
Jan 2 21:00:38 roger kernel: Oops: 0000
Jan 2 21:00:38 roger kernel: CPU: 0
Jan 2 21:00:38 roger kernel: EIP: 0010:[scanner:__insmod_scanner_O/lib/modules/2.4.17/kernel/drivers/usb/sc+-41200530/96] Not tainted
Jan 2 21:00:38 roger kernel: EIP: 0010:[<e614b46e>] Not tainted
Jan 2 21:00:38 roger kernel: EFLAGS: 00013287
Jan 2 21:00:38 roger kernel: eax: c02b1466 ebx: e50df180 ecx: c031ade8 edx: 00000000
Jan 2 21:00:38 roger kernel: esi: e7ff91e0 edi: e50df060 ebp: e50d0760 esp: e5099d70
Jan 2 21:00:38 roger kernel: ds: 0018 es: 0018 ss: 0018
Jan 2 21:00:38 roger kernel: Process X (pid: 1628, stackpage=e5099000)
Jan 2 21:00:38 roger kernel: Stack: c01ff4b0 e50df180 e50df060 c01ffa40 e50df180 ffffffff e4e7ff60 00000000
Jan 2 21:00:38 roger kernel: e4e7ff60 c01344ce e50df060 e4e7ff60 e4e22bfc e6ed1bc0 e7ffbce4 e6ed1bc0
Jan 2 21:00:38 roger kernel: 03ffff7f e4e7ff60 00000000 00000003 c013332d e4e7ff60 e6de76c0 00000000
Jan 2 21:00:38 roger kernel: Call Trace: [sock_release+16/96] [sock_close+48/64] [fput+78/240] [filp_close+141/160] [put_files_struct+77/208]
Jan 2 21:00:38 roger kernel: Call Trace: [<c01ff4b0>] [<c01ffa40>] [<c01344ce>] [<c013332d>] [<c011881d>]
Jan 2 21:00:38 roger kernel: [<c011901f>] [<c01122a0>] [<c0107464>] [<c0112698>] [<c01ff56c>] [<c01133c9>]
Jan 2 21:00:38 roger kernel: [<c0190530>] [<c01122e0>] [<c010700c>] [<c01ff4b0>] [<c01ffa40>] [<c01344ce>]
Jan 2 21:00:38 roger kernel: [<c013332d>] [<c013339b>] [<c0106f1b>]
Jan 2 21:00:38 roger kernel: Code: 33 3c 7e b8 33 3c 7e b8 33 3c 0a 00 00 00 00 10 00 00 00 00

>>EIP; e614b46e <_end+25e04bfa/2851978c> <=====
Trace; c01ff4b0 <sock_release+10/60>
Trace; c01ffa40 <sock_close+30/40>
Trace; c01344ce <fput+4e/f0>
Trace; c013332c <filp_close+8c/a0>
Trace; c011881c <put_files_struct+4c/d0>
Trace; c011901e <do_exit+10e/240>
Trace; c01122a0 <bust_spinlocks+50/60>
Trace; c0107464 <die+54/70>
Trace; c0112698 <do_page_fault+3b8/500>
Trace; c01ff56c <sock_sendmsg+6c/90>
Trace; c01133c8 <schedule+458/510>
Trace; c0190530 <normal_poll+110/130>
Trace; c01122e0 <do_page_fault+0/500>
Trace; c010700c <error_code+34/3c>
Trace; c01ff4b0 <sock_release+10/60>
Trace; c01ffa40 <sock_close+30/40>
Trace; c01344ce <fput+4e/f0>
Trace; c013332c <filp_close+8c/a0>
Trace; c013339a <sys_close+5a/70>
Trace; c0106f1a <system_call+32/38>
Code; e614b46e <_end+25e04bfa/2851978c>
00000000 <_EIP>:
Code; e614b46e <_end+25e04bfa/2851978c> <=====
0: 33 3c 7e xor (%esi,%edi,2),%edi <=====
Code; e614b470 <_end+25e04bfc/2851978c>
3: b8 33 3c 7e b8 mov $0xb87e3c33,%eax
Code; e614b476 <_end+25e04c02/2851978c>
8: 33 3c 0a xor (%edx,%ecx,1),%edi
Code; e614b478 <_end+25e04c04/2851978c>
b: 00 00 add %al,(%eax)
Code; e614b47a <_end+25e04c06/2851978c>
d: 00 00 add %al,(%eax)
Code; e614b47c <_end+25e04c08/2851978c>
f: 10 00 adc %al,(%eax)

Jan 2 21:00:38 roger kernel: <1>Unable to handle kernel paging request at virtual address ab7068e0
Jan 2 21:00:38 roger kernel: e614b46e
Jan 2 21:00:38 roger kernel: Oops: 0000
Jan 2 21:00:38 roger kernel: CPU: 0
Jan 2 21:00:38 roger kernel: EIP: 0010:[scanner:__insmod_scanner_O/lib/modules/2.4.17/kernel/drivers/usb/sc+-41200530/96] Not tainted
Jan 2 21:00:38 roger kernel: EIP: 0010:[<e614b46e>] Not tainted
Jan 2 21:00:38 roger kernel: EFLAGS: 00010286
Jan 2 21:00:38 roger kernel: eax: c02b1466 ebx: e1b86ca0 ecx: c031ade8 edx: 00000000
Jan 2 21:00:38 roger kernel: esi: e7ff91e0 edi: e1b86b80 ebp: e1bac1a0 esp: e33a9f3c
Jan 2 21:00:38 roger kernel: ds: 0018 es: 0018 ss: 0018
Jan 2 21:00:38 roger kernel: Process ksmserver (pid: 1964, stackpage=e33a9000)
Jan 2 21:00:38 roger kernel: Stack: c01ff4b0 e1b86ca0 e1b86b80 c01ffa40 e1b86ca0 ffffffff e1c685e0 00000000
Jan 2 21:00:38 roger kernel: e1c685e0 c01344ce e1b86b80 e1c685e0 e1bcd2e0 c0141932 e1bcd2e0 00000004
Jan 2 21:00:38 roger kernel: e1c685e0 e1c685e0 00000000 bfffef58 c013332d e1c685e0 e2745a60 00000000
Jan 2 21:00:38 roger kernel: Call Trace: [sock_release+16/96] [sock_close+48/64] [fput+78/240] [sys_select+1138/1152] [filp_close+141/160]
Jan 2 21:00:38 roger kernel: Call Trace: [<c01ff4b0>] [<c01ffa40>] [<c01344ce>] [<c0141932>] [<c013332d>]
Jan 2 21:00:38 roger kernel: [<c013339b>] [<c0106f1b>]
Jan 2 21:00:38 roger kernel: Code: 33 3c 7e b8 33 3c 7e b8 33 3c 0a 00 00 00 00 10 00 00 00 00

>>EIP; e614b46e <_end+25e04bfa/2851978c> <=====
Trace; c01ff4b0 <sock_release+10/60>
Trace; c01ffa40 <sock_close+30/40>
Trace; c01344ce <fput+4e/f0>
Trace; c0141932 <sys_select+472/480>
Trace; c013332c <filp_close+8c/a0>
Trace; c013339a <sys_close+5a/70>
Trace; c0106f1a <system_call+32/38>
Code; e614b46e <_end+25e04bfa/2851978c>
00000000 <_EIP>:
Code; e614b46e <_end+25e04bfa/2851978c> <=====
0: 33 3c 7e xor (%esi,%edi,2),%edi <=====
Code; e614b470 <_end+25e04bfc/2851978c>
3: b8 33 3c 7e b8 mov $0xb87e3c33,%eax
Code; e614b476 <_end+25e04c02/2851978c>
8: 33 3c 0a xor (%edx,%ecx,1),%edi
Code; e614b478 <_end+25e04c04/2851978c>
b: 00 00 add %al,(%eax)
Code; e614b47a <_end+25e04c06/2851978c>
d: 00 00 add %al,(%eax)
Code; e614b47c <_end+25e04c08/2851978c>
f: 10 00 adc %al,(%eax)

Jan 2 21:00:38 roger kernel: <1>Unable to handle kernel paging request at virtual address aba84920
Jan 2 21:00:38 roger kernel: e614b46e
Jan 2 21:00:38 roger kernel: Oops: 0000
Jan 2 21:00:38 roger kernel: CPU: 0
Jan 2 21:00:38 roger kernel: EIP: 0010:[scanner:__insmod_scanner_O/lib/modules/2.4.17/kernel/drivers/usb/sc+-41200530/96] Not tainted
Jan 2 21:00:38 roger kernel: EIP: 0010:[<e614b46e>] Not tainted
Jan 2 21:00:38 roger kernel: EFLAGS: 00010213
Jan 2 21:00:38 roger kernel: eax: c02b1466 ebx: e1d45cc0 ecx: c031ade8 edx: 00000000
Jan 2 21:00:38 roger kernel: esi: e7ff91e0 edi: e1d45ba0 ebp: e1d1e0a0 esp: e33a9d70
Jan 2 21:00:38 roger kernel: ds: 0018 es: 0018 ss: 0018
Jan 2 21:00:38 roger kernel: Process ksmserver (pid: 1964, stackpage=e33a9000)
Jan 2 21:00:38 roger kernel: Stack: c01ff4b0 e1d45cc0 e1d45ba0 c01ffa40 e1d45cc0 ffffffff e61a8120 00000000
Jan 2 21:00:38 roger kernel: e61a8120 c01344ce e1d45ba0 e61a8120 e2dacbfc e3679b40 e7ffbce4 e3679b40
Jan 2 21:00:38 roger kernel: 00007fef e61a8120 00000000 00000003 c013332d e61a8120 e2745a60 00000000
Jan 2 21:00:38 roger kernel: Call Trace: [sock_release+16/96] [sock_close+48/64] [fput+78/240] [filp_close+141/160] [put_files_struct+77/208]
Jan 2 21:00:38 roger kernel: Call Trace: [<c01ff4b0>] [<c01ffa40>] [<c01344ce>] [<c013332d>] [<c011881d>]
Jan 2 21:00:38 roger kernel: [<c011901f>] [<c01122a0>] [<c0107464>] [<c0112698>] [<c010657a>] [<c01066d4>]
Jan 2 21:00:38 roger kernel: [<c01122e0>] [<c010700c>] [<c01ff4b0>] [<c01ffa40>] [<c01344ce>] [<c0141932>]
Jan 2 21:00:38 roger kernel: [<c013332d>] [<c013339b>] [<c0106f1b>]
Jan 2 21:00:38 roger kernel: Code: 33 3c 7e b8 33 3c 7e b8 33 3c 0a 00 00 00 00 10 00 00 00 00

>>EIP; e614b46e <_end+25e04bfa/2851978c> <=====
Trace; c01ff4b0 <sock_release+10/60>
Trace; c01ffa40 <sock_close+30/40>
Trace; c01344ce <fput+4e/f0>
Trace; c013332c <filp_close+8c/a0>
Trace; c011881c <put_files_struct+4c/d0>
Trace; c011901e <do_exit+10e/240>
Trace; c01122a0 <bust_spinlocks+50/60>
Trace; c0107464 <die+54/70>
Trace; c0112698 <do_page_fault+3b8/500>
Trace; c010657a <setup_sigcontext+da/120>
Trace; c01066d4 <setup_frame+114/210>
Trace; c01122e0 <do_page_fault+0/500>
Trace; c010700c <error_code+34/3c>
Trace; c01ff4b0 <sock_release+10/60>
Trace; c01ffa40 <sock_close+30/40>
Trace; c01344ce <fput+4e/f0>
Trace; c0141932 <sys_select+472/480>
Trace; c013332c <filp_close+8c/a0>
Trace; c013339a <sys_close+5a/70>
Trace; c0106f1a <system_call+32/38>
Code; e614b46e <_end+25e04bfa/2851978c>
00000000 <_EIP>:
Code; e614b46e <_end+25e04bfa/2851978c> <=====
0: 33 3c 7e xor (%esi,%edi,2),%edi <=====
Code; e614b470 <_end+25e04bfc/2851978c>
3: b8 33 3c 7e b8 mov $0xb87e3c33,%eax
Code; e614b476 <_end+25e04c02/2851978c>
8: 33 3c 0a xor (%edx,%ecx,1),%edi
Code; e614b478 <_end+25e04c04/2851978c>
b: 00 00 add %al,(%eax)
Code; e614b47a <_end+25e04c06/2851978c>
d: 00 00 add %al,(%eax)
Code; e614b47c <_end+25e04c08/2851978c>
f: 10 00 adc %al,(%eax)

Jan 2 21:00:38 roger kernel: <1>Unable to handle kernel paging request at virtual address a92eece0
Jan 2 21:00:38 roger kernel: e614b46e

1 warning issued. Results may not be reliable.
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