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SubjectOops in ext3 error handling -> journal_abort
I managed to get this when mounting a corrupt volume, it looks like my 
journal got zapped. Andrew would a couple extra checks for
EXT3_SB(sb)->s_journal be ok during fill_super?

kernel is 2.5.64

EXT3-fs error (device loop(7,0)): ext3_check_descriptors: Block bitmap for
group 32 not in group (block 0)!
Unable to handle kernel NULL pointer dereference at virtual address 000000b4
printing eip:
c01a9cae
*pde = 00000000
Oops: 0002
CPU: 0
EIP: 0060:[<c01a9cae>] Tainted: PF
EFLAGS: 00010246
EIP is at journal_abort+0x1e/0x50
eax: c0454df9 ebx: 000000b4 ecx: 000000b4 edx: 00000077
esi: 00000000 edi: 00000020 ebp: cfd29dec esp: cfd29de4
ds: 007b es: 007b ss: 0068
Process mount (pid: 1417, threadinfo=cfd28000 task=cdcc4cc0)
Stack: c9988400 cf955c00 cfd29e04 c019f3e9 00000000 fffffffb cf955c00 00040001
cfd29e30 c019f439 cf955c00 c04655a0 cf955d38 c045ea3b c05c5d20 c05c5d20
c0465d40 cfd29e44 c172a704 cfd29e64 c01a049a cf955c00 c045ea3b c0465d40
Call Trace:
[<c019f3e9>] ext3_handle_error+0x79/0x90
[<c019f439>] ext3_error+0x39/0x40
[<c01a049a>] ext3_check_descriptors+0xba/0xd0
[<c01a0d21>] ext3_fill_super+0x581/0x9d0
[<c01628f3>] get_sb_bdev+0x103/0x150
[<c01a1d1d>] ext3_get_sb+0x1d/0x30
[<c01a07a0>] ext3_fill_super+0x0/0x9d0
[<c0162ad0>] do_kern_mount+0x40/0xc0
[<c017a9e7>] do_add_mount+0x57/0x160
[<c017acf0>] do_mount+0x140/0x1b0
[<c017b173>] sys_mount+0xb3/0x100
[<c0109a17>] syscall_call+0x7/0xb

Code: f0 ff 8e b4 00 00 00 0f 88 ea 0a 00 00 8b 4d 0c 51 56 e8 7b

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