From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 14911] kernel BUG at fs/ext4/inode.c
Date: Tue, 29 Dec 2009 07:46:59 GMT
Message-ID: <200912290746.nBT7kxwP024874@demeter.kernel.org>
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Artem Anisimov changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |aanisimov@inbox.ru
--- Comment #1 from Artem Anisimov 2009-12-29 07:46:56 ---
I am experiencing a similar problem with ext4 (BUG at inode.c:1063) and I'd
like to provide some more information on it.
In my setup /boot partition is mounted read-only at startup. The error occurs
when I remount it rw and try to copy a file to that partition.
Stack trace that I get is, however, a bit different, so it's necessary to note
that I use UP implementation of RCU (in my case mpage_da_map_blocks() is called
from rcu_read_unlock()).
Here is my stack trace and error message:
kernel BUG at fs/ext4/inode.c:1063!
invalid opcode: 0000 [#1] PREEMPT
last sysfs file: /sys/devices/pci0000:00/0000:00:1e.0/0000:01:05.0/resource
Modules linked in: ipw2200 libipw
Pid: 2415, comm: flush-8:0 Not tainted 2.6.33-rc2 #2 M5A /M5A
EIP: 0060:[] EFLAGS: 00010297 CPU: 0
EIP is at ext4_get_blocks+0x19f/0x297
EAX: 00000001 EBX: 00000002 ECX: 00000009 EDX: 00000006
ESI: 00000009 EDI: d71e5d5c EBP: f6d20648 ESP: d71e5d18
DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068
Process flush-8:0 (pid: 2415, ti=d71e4000 task=e5bfd130 task.ti=d71e4000)
Stack:
f6d206c8 00000040 000006fe 0000010c f6d206bc f69cf200 d71e5d5c e5bfd130
<0> d71e5e88 f6e73000 c10a7236 00000040 d71e5d5c 0000000d 0000010c e234fa68
<0> 00000000 00000060 0000000e d71e5d70 0000110d 00000400 0000005f f6d011c0
Call Trace:
[] ? mpage_da_map_blocks+0x74/0x2ab
[] ? rcu_read_unlock+0x14/0x1e
[] ? find_get_pages_tag+0x9b/0xb7
[] ? mpage_add_bh_to_extent+0x6f/0x86
[] ? __mpage_da_writepage+0xcf/0x10a
[] ? write_cache_pages+0x16e/0x232
[] ? __mpage_da_writepage+0x0/0x10a
[] ? ext4_da_writepages+0x274/0x3f5
[] ? do_writepages+0x14/0x20
[] ? writeback_single_inode+0xca/0x260
[] ? writeback_inodes_wb+0x337/0x3f1
[] ? wb_writeback+0xef/0x14c
[] ? schedule+0x2af/0x2bf
[] ? wb_do_writeback+0x68/0x132
[] ? bdi_writeback_task+0x20/0x7b
[] ? bdi_start_fn+0x51/0xa0
[] ? bdi_start_fn+0x0/0xa0
[] ? kthread+0x5e/0x63
[] ? kthread+0x0/0x63
[] ? kernel_thread_helper+0x6/0x10
Code: 08 89 c2 8b 04 24 e8 09 ed ff ff 89 c6 8b 85 f0 01 00 00 39 c6 76 04 0f
0b eb fe 31 db 29 f0 74 35 8b 9d f4 01 00 00 39 d8 7d 04 <0f> 0b eb fe 89 c2 8b
44 24 14 29 da 89 d1 c1 f9 1f 05 a8 00 00
EIP: [] ext4_get_blocks+0x19f/0x297 SS:ESP 0068:d71e5d18
---[ end trace 5e36b9d9dd2f2ce5 ]---
note: flush-8:0[2415] exited with preempt_count 1
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