Re: odd memory corruption in 2.5.27?

From: Zwane Mwaikambo (zwane@linuxpower.ca)
Date: Tue Jul 23 2002 - 01:24:30 EST

Hi Al,

Hmm this is wild pointer #2, whats -really- freaky is that its the same
address 0x14(00000078), this was also over NFS.

Unable to handle kernel NULL pointer dereference at virtual address 0000008c
c014cd1d
*pde = 00000000
Oops: 0002
CPU: 0
EIP: 0010:[<c014cd1d>] Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010206
eax: ccefb4c0 ebx: 00000078 ecx: 00000003 edx: ccf30000
esi: ccefb39c edi: 00000003 ebp: bfffe998 esp: ccf31f5c
ds: 0018 es: 0018 ss: 0018
Stack: ccf31f7c fffffff7 c0154970 ccf31f7c bfffe9e0 c0154ed1 00000003 ccf31f7c
       00000246 00000246 c4ca7000 00000001 00000000 00000000 00000400 00000078
       00000003 c4ca7000 bfffe9c8 c014b066 c16b6a30 c4ca7000 ccf30000 bfffe9e0
Call Trace: [<c0154970>] [<c0154ed1>] [<c014b066>] [<c01075db>]
Code: f0 ff 43 14 f0 ff 46 04 ff 4a 10 8b 42 08 83 e0 08 74 05 e8

>>EIP; c014cd1d <fget+4d/70> <=====
Trace; c0154970 <vfs_fstat+10/40>
Trace; c0154ed1 <sys_fstat64+11/30>
Trace; c014b066 <sys_open+66/70>
Trace; c01075db <syscall_call+7/b>
Code; c014cd1d <fget+4d/70>
00000000 <_EIP>:
Code; c014cd1d <fget+4d/70> <=====
   0: f0 ff 43 14 lock incl 0x14(%ebx) <=====
Code; c014cd21 <fget+51/70>
   4: f0 ff 46 04 lock incl 0x4(%esi)
Code; c014cd25 <fget+55/70>
   8: ff 4a 10 decl 0x10(%edx)
Code; c014cd28 <fget+58/70>
   b: 8b 42 08 mov 0x8(%edx),%eax
Code; c014cd2b <fget+5b/70>
   e: 83 e0 08 and $0x8,%eax
Code; c014cd2e <fget+5e/70>
  11: 74 05 je 18 <_EIP+0x18> c014cd35 <fget+65/70>
Code; c014cd30 <fget+60/70> 

-- 
function.linuxpower.ca

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This archive was generated by hypermail 2b29 : Tue Jul 23 2002 - 22:00:42 EST