Comment 1 for bug 548924

Begin: Adding live session user... ...
[ 38.143585] kernel BUG at /home/amit/work/.Canonical/sources/ubuntu-lucid/ubuntu/aufs/f_op.c:84!
[ 38.152496] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[ 38.160675] pgd = cf924000
[ 38.163391] [00000000] *pgd=8ef76031, *pte=00000000, *ppte=00000000
[ 38.169738] Internal error: Oops: 817 [#1]
[ 38.173858] last sysfs file: /sys/kernel/uevent_seqnum
[ 38.179016] Modules linked in: squashfs nls_iso8859_1 nls_cp437
[ 38.184997] CPU: 0 Tainted: G C (2.6.33-500-omap #3)
[ 38.191040] PC is at __bug+0x1c/0x24
[ 38.194641] LR is at __bug+0x18/0x24
[ 38.198242] pc : [<c003b6dc>] lr : [<c003b6d8>] psr: 60000013
[ 38.198242] sp : c14a3e20 ip : c0620760 fp : 00000000
[ 38.209777] r10: ceeeec00 r9 : c03786cc r8 : 00020241
[ 38.215026] r7 : 00000001 r6 : 00000001 r5 : cef7d8c0 r4 : cf601918
[ 38.221588] r3 : 00000000 r2 : c05e6e58 r1 : 60000013 r0 : 0000006a
[ 38.228149] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user
[ 38.235321] Control: 10c5387d Table: 8f924019 DAC: 00000015
[ 38.241088] Process grpconv (pid: 198, stack limit = 0xc14a22e8)
[ 38.247131] Stack: (0xc14a3e20 to 0xc14a4000)
[ 38.251525] 3e20: cf601918 c0378774 00000000 00000000 00000000 cef7d8c0 cf601918 c03775e8
[ 38.259735] 3e40: 00020242 c037ce0c 00000001 ffffffff 00000000 c037d09c cef7d8c0 00000000
[ 38.267944] 3e60: 00000000 cf602d18 00020242 cf601918 cf80bd40 c00f3ab8 00000022 c03786bc
[ 38.276184] 3e80: c14a3ef8 cef7d8c0 cf507998 00000000 c14a3ef8 00020242 00000000 00020241
[ 38.284393] 3ea0: 00000000 c00f3d30 cef807c0 cf507998 00000000 c0101e54 0000000f 00000000
[ 38.292633] 3ec0: 00000000 c14a3f0c 000081a0 00000001 c067ce34 c14a3f0c c14a3f50 000001b6
[ 38.300842] 3ee0: cf8f9000 ffffff9c 00000200 00000000 c14a2000 00000000 cf80bd40 cf601918
[ 38.309051] 3f00: aefe9110 00000008 cf8f9005 cf80bd40 cf517218 00000300 00000000 00000000
[ 38.317291] 3f20: cef7d4c0 bef9d620 c14a3f48 bef9d600 000000c5 c0037c48 c14a2000 00000000
[ 38.325500] 3f40: 00000000 00020242 000001b6 cef7d8c0 cf80bd40 cf601918 0000000a 00020241
[ 38.333740] 3f60: 000001b6 ffffff9c 0000000a cf8f9000 c14a2000 00000000 00000000 c00f3880
[ 38.341949] 3f80: 00000022 00000000 00019d68 4012d000 00000004 00000005 c0037c48 c14a2000
[ 38.350158] 3fa0: 00000000 c0037aa0 00019d68 4012d000 bef9d6fc 00020241 000001b6 000001b6
[ 38.358398] 3fc0: 00019d68 4012d000 00000004 00000005 0000c7ec 00000000 00000001 00000000
[ 38.366607] 3fe0: 00000004 bef9d580 40095b01 400cff7c 60000010 bef9d6fc 80893021 80893421
[ 38.374847] [<c003b6dc>] (__bug+0x1c/0x24) from [<c0378774>] (aufs_fault+0x0/0x158)
[ 38.382568] [<c0378774>] (aufs_fault+0x0/0x158) from [<00000000>] (0x0)
[ 38.389221] Code: e3080ff4 e34c0052 eb10521b e3a03000 (e5833000)
[ 38.395385] ---[ end trace 6bcd4e0e8e189ed8 ]---