Hi,
Red Hat 2.2.5-15 kernel Oops "Unable to handle kernel NULL pointer
dereference at virtual address 00000000" in kmem_cache_free, running SMP
kernel version 2.2.5-15. The problem has also occured on a UP version of
same 2.2.5 kernel.
(We've already run two separate types of memory tests, one that comes
with the hp-netservers, and one untar-and-recursive-diff script.
Neither
one pointed out any memory errors.)
ksymoops output from ksymoops 2.3.3:
ksymoops 2.3.3 on i686 2.2.10. Options used
-V (specified)
-k proc.ksyms (specified)
-l proc.modules (specified)
-o 2.2.5-15smp/ (specified)
-m System.map-2.2.5-15smp (specified)
-S
Unable to handle kernel NULL pointer dereference at virtual address
00000000
current->tss.cr3 = 00101000, %cr3 = 00101000
*pde = 00000000
Oops: 0002
CPU: 1
EIP: 0010:[<c012308f>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010286
eax: 00000040 ebx: cb71ccc0 ecx: c68ea000 edx: c79ba000
esi: c058f680 edi: 00000286 ebp: cce2efe0 esp: c68ebf54 ds: 0018
es: 0018 ss: 0018
Process cucipop (pid: 1051, process nr: 31, stackpage=c68eb000)
Stack: d022ef20 00003000 cb71ccfc c011e5b6 c011e5d5 c058f680 cb71ccc0
d022ef20
00101000 c68ea000 c68ebfb4 00000000 c011439c d022ef20 d022ef20
d022ef20
c0118f2d d022ef20 c68ea000 4013cf04 00000000 c810c540 c8619740
c68ea000
Call Trace: [<c011e5b6>] [<c011e5d5>] [<c011439c>] [<c0118f2d>]
[<c011911f>] [<c0108b6c>]
Code: c7 05 00 00 00 00 00 00 00 00 eb 10 90 56 53 68 3e c5 1d c0
>>EIP; c012308f <kmem_cache_free+173/198> <=====
Trace; c011e5b6 <exit_mmap+ae/108>
Trace; c011e5d5 <exit_mmap+cd/108>
Trace; c011439c <mmput+1c/34>
Trace; c0118f2d <do_exit+f1/2d4>
Trace; c011911f <sys_exit+f/10>
Trace; c0108b6c <system_call+34/38>
Code; c012308f <kmem_cache_free+173/198> 00000000 <_EIP>:
Code; c012308f <kmem_cache_free+173/198> 0: c7 05 00 00 00 00
00 movl $0x0,0x0 <=====
Code; c0123096 <kmem_cache_free+17a/198> 7: 00 00 00
Code; c0123099 <kmem_cache_free+17d/198> a: eb
10 jmp 1c <_EIP+0x1c> c01230ab
<kmem_cache_free+18f/198>
Code; c012309b <kmem_cache_free+17f/198> c:
90 nop
Code; c012309c <kmem_cache_free+180/198> d:
56 pushl %esi
Code; c012309d <kmem_cache_free+181/198> e:
53 pushl %ebx
Code; c012309e <kmem_cache_free+182/198> f: 68 3e c5 1d
c0 pushl $0xc01dc53e
---------- The original oops message is listed below --------
martin # kmem_free: Bad obj addr (objp=cb71ccc0, name=vm_area_struct)
Unable to handle kernel NULL pointer dereference at virtual address
00000000
current->tss.cr3 = 00101000, %cr3 = 00101000
*pde = 00000000
Oops: 0002
CPU: 1
EIP: 0010:[<c012308f>]
EFLAGS: 00010286
eax: 00000040 ebx: cb71ccc0 ecx: c68ea000 edx: c79ba000
esi: c058f680 edi: 00000286 ebp: cce2efe0 esp: c68ebf54
ds: 0018 es: 0018 ss: 0018
Process cucipop (pid: 1051, process nr: 31, stackpage=c68eb000)
Stack: d022ef20 00003000 cb71ccfc c011e5b6 c011e5d5 c058f680 cb71ccc0
d022ef20
00101000 c68ea000 c68ebfb4 00000000 c011439c d022ef20 d022ef20
d022ef20
c0118f2d d022ef20 c68ea000 4013cf04 00000000 c810c540 c8619740
c68ea000
Call Trace: [<c011e5b6>] [<c011e5d5>] [<c011439c>] [<c0118f2d>]
[<c011911f>] [<c0108b6c>]
Code: c7 05 00 00 00 00 00 00 00 00 eb 10 90 56 53 68 3e c5 1d c0
ICMP: 212.72.199.165: Source Route Failed.
ICMP: 212.72.199.165: Source Route Failed.
ICMP: 212.72.199.134: Source Route Failed.
ICMP: 212.72.199.165: Source Route Failed.
ICMP: 212.72.199.165: Source Route Failed.
--------------------------------------------------------------------
I would appreciate any assistance if possible.
Any ideas if the above is fixed ?
Sincerely,
Dilip Daya.
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This archive was generated by hypermail 2b29 : Wed Mar 15 2000 - 21:00:28 EST