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SubjectOops with 2.1.22
Date
It happened when I try to tar-gzip a file from a full ext2fs partition
to a msdos partition.

Unable to handle kernel NULL pointer dereference at virtual address 00000018
current->tss.cr3 = 008a5000, Dr3 = 008a5000
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c012595c>]
EFLAGS: 00010286
eax: 00000000 ebx: c1bc0ed4 ecx: c019eb04 edx: c01efe38
esi: 00000000 edi: c1bc0ed4 ebp: 00000200 esp: c1bc0e9c
ds: 0018 es: 0018 ss: 0018
Process gzip (pid: 8805, process nr: 50, stackpage=c1bc0000)
Stack: c1bc0ed4 00000000 00000200 00008000 00000000 c0125a15 c13b5d18 c1bc0ed4
00000200 c194d398 00020303 00000000 00000200 00020303 00000004 00000200
0002fe05 00000d05 c0125d67 00000303 c0125e96 00000200 c194d398 0002fe06
Call Trace: [<c0125a15>] [<c0125d67>] [<c0125e96>] [<c280a100>] [<c280d83b>] [<c280bc44>] [<c0118258>]
[<c0123bce>] [<c010a438>]
Code: 8b 40 18 89 44 24 10 ff 0f 83 7c 24 10 00 0f 85 34 ff ff ff

ksymoops v2.0 gives :

EIP: 0010:c012595c <find_candidate+d8/f8>
EFLAGS: 00010286
eax: 00000000
ebx: c1bc0ed4 <%esp+38>
ecx: c019eb04 <free_area+0/48>
edx: c01efe38
esi: 00000000
edi: c1bc0ed4 <%esp+38>
ebp: 00000200
esp: c1bc0e9c <%esp+0>
ds: 0018 es: 0018 ss: 0018
Process gzip (pid: 8805, process nr: 50, stackpage=c1bc0000)
esp+0 : c1bc0ed4 <%esp+38>
esp+4 : 00000000
esp+8 : 00000200
esp+12: 00008000
esp+16: 00000000
esp+20: c0125a15 <refill_freelist+99/3bc>
esp+24: c13b5d18
esp+28: c1bc0ed4 <%esp+38>
esp+32: 00000200
esp+36: c194d398
esp+40: 00020303
esp+44: 00000000
esp+48: 00000200
esp+52: 00020303
esp+56: 00000004
esp+60: 00000200
esp+64: 0002fe05
esp+68: 00000d05
esp+72: c0125d67 <getblk+2f/3a8>
esp+76: 00000303
esp+80: c0125e96 <getblk+15e/3a8>
esp+84: 00000200
esp+88: c194d398
esp+92: 0002fe06
Trace: c0125a15 <refill_freelist+99/3bc>
Trace: c0125d67 <getblk+2f/3a8>
Trace: c0125e96 <getblk+15e/3a8>
Trace: c280a100
Trace: c280d83b <fat_add_cluster+19f/374>
Trace: c280bc44 <fat_file_write+12c/488>
Trace: c0118258 <it_real_fn+0/48>
Trace: c0123bce <sys_write+b2/e8>
Trace: c010a438 <system_call+38/40>
Code: <find_candidate+d8/f8> movl 0x18(%eax),%eax
Code: <find_candidate+db/f8> movl %eax,0x10(%esp,1)
Code: <find_candidate+df/f8> decl (%edi)
Code: <find_candidate+e1/f8> cmpl $0x0,0x10(%esp,1)
Code: <find_candidate+e6/f8> jne ffffff48 <_EIP+ffffff48>
Code: <find_candidate+ec/f8>

Hope this help,
--
Regis "HPReg" DUCHESNE - Engineering Student at ***** ******** *****
www http://www.via.ecp.fr/~regis/
(O o) I use Linux & 3Com (1135 Kb/s over 10Mb/s ethernet)
--.oOO--(_)--OOo.-----------------------------------------------------------

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