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SubjectOops in d_alloc:647 2.5.61
I got this unmounting NFS filesystem. If anyone would require more 
information holla back.

Unmounting NFS filesystems: Unable to handle kernel NULL pointer dereference at virtual address 0000007b
printing eip:
c0172803
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0060:[<c0172803>] Not tainted
EFLAGS: 00000207
EIP is at d_alloc+0x43/0x1f0
eax: 0000007b ebx: c18a2d3c ecx: 0000001e edx: c0d9d874
esi: 0000007b edi: c0d9d874 ebp: c0d8dd7c esp: c0d8dd70
ds: 007b es: 007b ss: 0068
Process lockd (pid: 600, threadinfo=c0d8c000 task=c1a4ed00)
Stack: 00000000 c0d9fce4 c0daf27c c0d8dd98 c0169663 c0daf27c c0d8ddb4 c043d0bb
00000077 c0d9fd54 c0d8dde8 c040ecc8 c0d8ddb4 c0daf27c c0d9fce4 c0daf27c
c1ff9940 0000007b 0000007b ffffff00 00000010 00000001 00000000 00000000
Call Trace:
[<c0169663>] lookup_hash+0x53/0xb0
[<c040ecc8>] rpc_rmdir+0x68/0xb0
[<c03fce63>] rpc_destroy_client+0x23/0x80
[<c0402f3c>] rpc_release_task+0x23c/0x300
[<c0402326>] __rpc_execute+0xc6/0x460
[<c011d220>] default_wake_function+0x0/0x20
[<c03fd18b>] rpc_call_sync+0x5b/0xa0
[<c03fd19e>] rpc_call_sync+0x6e/0xa0
[<c04012d0>] rpc_run_timer+0x0/0x130
[<c040aa52>] rpc_register+0xa2/0x120
[<c0140000>] set_ratelimit+0x30/0xa0
[<c04056de>] svc_register+0x14e/0x180
[<c0405272>] svc_destroy+0x42/0xc0
[<c01e3895>] lockd+0x1b5/0x260
[<c01e36e0>] lockd+0x0/0x260
[<c0107355>] kernel_thread_helper+0x5/0x10

Code: f3 a5 a8 02 74 02 66 a5 a8 01 74 01 a4 8b 4d 0c 8b 41 04 c6

Code; 00000000 Before first symbol
00000000 <_EIP>:
Code; 00000000 Before first symbol
0: f3 a5 repz movsl %ds:(%esi),%es:(%edi)
Code; 00000002 Before first symbol
2: a8 02 test $0x2,%al
Code; 00000004 Before first symbol
4: 74 02 je 8 <_EIP+0x8>
Code; 00000006 Before first symbol
6: 66 a5 movsw %ds:(%esi),%es:(%edi)
Code; 00000008 Before first symbol
8: a8 01 test $0x1,%al
Code; 0000000a Before first symbol
a: 74 01 je d <_EIP+0xd>
Code; 0000000c Before first symbol
c: a4 movsb %ds:(%esi),%es:(%edi)
Code; 0000000d Before first symbol
d: 8b 4d 0c mov 0xc(%ebp),%ecx
Code; 00000010 Before first symbol
10: 8b 41 04 mov 0x4(%ecx),%eax
Code; 00000013 Before first symbol
13: c6 00 00 movb $0x0,(%eax)


(gdb) list *d_alloc+0x43
0xc0172803 is in d_alloc (include/asm/string.h:196).
191 }
192
193 static inline void * __memcpy(void * to, const void * from, size_t n)
194 {
195 int d0, d1, d2;
196 __asm__ __volatile__(
197 "rep ; movsl\n\t"
198 "testb $2,%b4\n\t"
199 "je 1f\n\t"
200 "movsw\n"

(gdb) list *d_alloc+0x36
0xc01727f6 is in d_alloc (fs/dcache.c:645).
640 if (!str) {
641 kmem_cache_free(dentry_cache, dentry);
642 return NULL;
643 }
644 } else
645 str = dentry->d_iname;
646
647 memcpy(str, name->name, name->len);
648 str[name->len] = 0;
649

--
function.linuxpower.ca
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