kernel BUG at /build/buildd/linux-ec2-2.6.32/fs/ext4/inode.c:1852!

There is a report for this same issue on the kernel bugzilla, including a patch at: https://bugzilla.kernel.org/show_bug.cgi?id=15231

This bug manifests in the affected partition becoming locked/inaccessible.

I have not yet tested the patch in the bug report above, but I'm working on it. System log is as follows:

Ubuntu 10.04 LTS domU-12-31-38-06-F4-02 tty1

domU-12-31-38-06-F4-02 login: [ 134.802484] ------------[ cut here ]------------

[ 134.802502] kernel BUG at /build/buildd/linux-ec2-2.6.32/fs/ext4/inode.c:1852!

[ 134.802508] invalid opcode: 0000 [#1] SMP

[ 134.802514] last sysfs file: /sys/kernel/uevent_seqnum

[ 134.802517] CPU 0

[ 134.802520] Modules linked in: ipv6

[ 134.802526] Pid: 1099, comm: ruby Not tainted 2.6.32-305-ec2 #9-Ubuntu

[ 134.802530] RIP: e030:[<ffffffff811cb6dc>] [<ffffffff811cb6dc>] T.1072+0x20c/0x210

[ 134.802542] RSP: e02b:ffff8801c59d5b38 EFLAGS: 00010297

[ 134.802546] RAX: 0000000000000018 RBX: ffff8801b4b5d0e0 RCX: 0000000000000154

[ 134.802550] RDX: 0000000000000019 RSI: 0000000000000018 RDI: 0000000000000153

[ 134.802554] RBP: ffff8801c59d5b88 R08: 0000000000000000 R09: 0000000000000000

[ 134.802558] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801b4b5d3a8

[ 134.802562] R13: ffff8801b4b5d0e0 R14: ffff8801b4b5d040 R15: 0000000000000018

[ 134.802571] FS: 00007fb608570710(0000) GS:ffff88000183c000(0000) knlGS:0000000000000000

[ 134.802575] CS: e033 DS: 0000 ES: 0000 CR0: 0000000080050033

[ 134.802579] CR2: 00007fb607246000 CR3: 00000001cd643000 CR4: 0000000000002660

[ 134.802583] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000

[ 134.802587] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000000

[ 134.802592] Process ruby (pid: 1099, threadinfo ffff8801c59d4000, task ffff8801c9daa280)

[ 134.802596] Stack:

[ 134.802599] ffff880100000000 ffff8801dc014400 0000000000000000 0000000000001d48

[ 134.802605] <0> ffff880008f4c8e8 ffff880199d4c130 ffffffffffff0000 ffff8801b4b5d0e0

[ 134.802613] <0> 0000000000001d48 0000000000000000 ffff8801c59d5bb8 ffffffff811cdcb0

[ 134.802621] Call Trace:

[ 134.802627] [<ffffffff811cdcb0>] ext4_da_get_block_prep+0xc0/0x100

[ 134.802633] [<ffffffff8111987c>] __block_prepare_write+0x1ac/0x580

[ 134.802638] [<ffffffff811cdbf0>] ? ext4_da_get_block_prep+0x0/0x100

[ 134.802644] [<ffffffff810ada09>] ? find_get_page+0x19/0xa0

[ 134.802648] [<ffffffff81119ddf>] block_write_begin+0x5f/0x100

[ 134.802653] [<ffffffff811d01ad>] ext4_da_write_begin+0x12d/0x260

[ 134.802658] [<ffffffff811cdbf0>] ? ext4_da_get_block_prep+0x0/0x100

[ 134.802663] [<ffffffff811ca6cf>] ext4_page_mkwrite+0x12f/0x190

[ 134.802668] [<ffffffff810cb285>] __do_fault+0xb5/0x680

[ 134.802672] [<ffffffff810cd160>] handle_mm_fault+0x260/0x4f0

[ 134.802678] [<ffffffff814a5fd7>] do_page_fault+0x147/0x390

[ 134.802683] [<ffffffff814a3e18>] page_fault+0x28/0x30

[ 134.802686] Code: 48 83 c4 28 31 c0 5b 41 5c 41 5d 41 5e 41 5f c9 c3 66 0f 1f 44 00 00 48 83 c4 28 b8 e4 ff ff ff 5b 41 5c 41 5d 41 5e 41 5f c9 c3 <0f> 0b eb fe 55 48 89 e5 48 83 ec 40 85 f6 48 89 5d d8 4c 89 65

[ 134.802742] RIP [<ffffffff811cb6dc>] T.1072+0x20c/0x210

[ 134.802747] RSP <ffff8801c59d5b38>

[ 134.802811] ---[ end trace 1f2cf7670a0a024e ]---