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SubjectRe: [CHECKER] 56 potential lock/unlock bugs in 2.5.8
On Fri, Jul 12, 2002 at 08:32:20PM +0200, Roman Zippel wrote:
> Which last few kernels? Was it a ffs or an ofs image? For ofs images you
> have to call fsx with "-W -R" to disable mmap operations.

OFS afaik. Has this always been the case ? I'm sure I ran fsx without
disabling mmap before on this image, and it used to pass.

Second bad news, with the -W -R options, it goes splat in an
even more dramatic way.

Dave.


Unable to handle kernel NULL pointer dereference at virtual address 00000008
c01f91a7
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c01f91a7>] Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010296
eax: c01f9198 ebx: 000006a0 ecx: cff6bea8 edx: 00000000
esi: c133acc0 edi: cd352524 ebp: cefb6c00 esp: cd0efe9c
ds: 0018 es: 0018 ss: 0018
Process fsx (pid: 908, stackpage=cd0ef000)
Stack: 000006a0 c133acc0 cd352524 cefb6c00 cd352524 c01f9a26 00000000 c133acc0 000006a0 000006a0 000186a0 00000000 cd352474 00000000 00000000 cd352474 00000000 000000cc c0123f01 00000002 c0123f60 cd352474 00000048 cd0eff74 Call Trace: [<c01f9a26>] [<c0123f01>] [<c0123f60>] [<c0144eab>] [<c01f7bdf>]
[<c0144fe0>] [<c0131669>] [<c0131907>] [<c0106b73>]
Code: 8b 42 08 31 d2 8b 48 08 8b 74 24 1c 8b 46 18 a9 08 00 00 00


>>EIP; c01f91a7 <affs_prepare_write_ofs+f/fc> <=====

>>eax; c01f9198 <affs_prepare_write_ofs+0/fc>
>>ebx; 000006a0 Before first symbol
>>ecx; cff6bea8 <END_OF_CODE+fabb96c/????>
>>esi; c133acc0 <END_OF_CODE+e8a784/????>
>>edi; cd352524 <END_OF_CODE+cea1fe8/????>
>>ebp; cefb6c00 <END_OF_CODE+eb066c4/????>
>>esp; cd0efe9c <END_OF_CODE+cc3f960/????>

Trace; c01f9a26 <affs_truncate+a6/375>
Trace; c0123f01 <vmtruncate+9d/124>
Trace; c0123f60 <vmtruncate+fc/124>
Trace; c0144eab <inode_setattr+23/b0>
Trace; c01f7bdf <affs_notify_change+77/94>
Trace; c0144fe0 <notify_change+5c/dc>
Trace; c0131669 <do_truncate+4d/64>
Trace; c0131907 <sys_ftruncate+107/11c>
Trace; c0106b73 <system_call+33/40>

Code; c01f91a7 <affs_prepare_write_ofs+f/fc>
00000000 <_EIP>:
Code; c01f91a7 <affs_prepare_write_ofs+f/fc> <=====
0: 8b 42 08 mov 0x8(%edx),%eax <=====
Code; c01f91aa <affs_prepare_write_ofs+12/fc>
3: 31 d2 xor %edx,%edx
Code; c01f91ac <affs_prepare_write_ofs+14/fc>
5: 8b 48 08 mov 0x8(%eax),%ecx
Code; c01f91af <affs_prepare_write_ofs+17/fc>
8: 8b 74 24 1c mov 0x1c(%esp,1),%esi
Code; c01f91b3 <affs_prepare_write_ofs+1b/fc>
c: 8b 46 18 mov 0x18(%esi),%eax
Code; c01f91b6 <affs_prepare_write_ofs+1e/fc>
f: a9 08 00 00 00 test $0x8,%eax



--
| Dave Jones. http://www.codemonkey.org.uk
| SuSE Labs
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