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Subject2.1.77: Oops while reading /proc/locks
Hello,

When I read /proc/locks, I get the attached oops.
Kernel is 2.1.77 with e2compr patch.
If you need more information, please ask.

Greetings,
Jitse Niesen


[28] /usr/src/linux/scripts ROOT: cat /proc/locks
Unable to handle kernel NULL pointer dereference at virtual address 00000008
current->tss.cr3 = 01719000, %cr3 = 01719000
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c012e871>]
EFLAGS: 00010286
eax: 00000000 ebx: 00000000 ecx: 00000001 edx: c018ec8c
esi: c161f300 edi: c161f300 ebp: 00000c00 esp: c0f7def0
ds: 0018 es: 0018 ss: 0018
Process cat (pid: 16755, process nr: 46, stackpage=c0f7d000)
Stack: 00000000 00000001 c161f300 c012e9a4 c161f300 00000001 c018ec8c 00000000
c0f7df90 c1d5c000 00000c00 c0f7c38c 00000000 00000001 0804af38 c161f300
c1d5c000 c0149f25 c1d5c000 c0f7df90 00000000 00000c00 00000000 c08b1104
Call Trace: [<c012e9a4>] [<c018ec8c>] [<c0149f25>] [<c014a07e>] [<c010e9f3>] [<c012374e>] [<c010997e>]
Code: 8b 78 08 52 51 68 07 ec 18 c0 68 04 a1 1b c0 e8 eb b3 05 00
Segmentation fault

[29] /usr/src/linux/scripts ROOT: ksymoops /System.map < ~/oops
Using `/System.map' to map addresses to symbols.

>>EIP: c012e871 <lock_get_status+15/100>
Trace: c012e9a4 <get_locks_status+48/1dc>
Trace: c018ec8c <tvecs+1fec/493a>
Trace: c0149f25 <get_root_array+191/1a0>
Trace: c014a07e <array_read+c2/220>
Trace: c010e9f3 <do_page_fault+12f/33c>
Trace: c012374e <sys_read+ba/104>
Trace: c010997e <system_call+3a/40>
Code: c012e871 <lock_get_status+15/100>
Code: c012e871 <lock_get_status+15/100> 8b 78 08 movl 0x8(%eax),%edi
Code: c012e874 <lock_get_status+18/100> 52 pushl %edx
Code: c012e875 <lock_get_status+19/100> 51 pushl %ecx
Code: c012e876 <lock_get_status+1a/100> 68 07 ec 18 c0 pushl $0xc018ec07
Code: c012e881 <lock_get_status+25/100> 68 04 a1 1b c0 pushl $0xc01ba104
Code: c012e886 <lock_get_status+2a/100> e8 eb b3 05 00 call c0189c70 <sprintf>


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