linux-kernel - Re: BUG: unable to handle kernel paging request at 6b6b6c6f (bdi_lock

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Date:	Mon, 5 Sep 2011 23:47:50 +0100
From:	Sitsofe Wheeler <sitsofe@...oo.com>
To:	Jens Axboe <axboe@...nel.dk>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: BUG: unable to handle kernel paging request at 6b6b6c6f
 (bdi_lock_two+0x22/0x50)

On Thu, Sep 01, 2011 at 10:04:42PM +0100, Sitsofe Wheeler wrote:
> When pulling out a USB flash disk formatted with a single FAT32
> partition the following oops and errors are produced:
> 
> [  112.427744] FAT-fs (sdc1): FAT read failed (blocknr 685)
> [  112.427832] FAT-fs (sdc1): unable to read inode block for updating (i_pos 209504275)
> [  112.523097] BUG: unable to handle kernel paging request at 6b6b6c6f
> [  112.523229] IP: [<b0157dbf>] __lock_acquire+0x23f/0x1740
> [  112.523328] *pde = 00000000 
> [  112.523381] Oops: 0002 [#1] DEBUG_PAGEALLOC
> [  112.523459] 
> [  112.523490] Pid: 1486, comm: nautilus Not tainted 3.1.0-rc4-00131-g9e79e3e-dirty #488 ASUSTeK Computer INC. 900/900
> [  112.523665] EIP: 0060:[<b0157dbf>] EFLAGS: 00010002 CPU: 0
> [  112.523751] EIP is at __lock_acquire+0x23f/0x1740
> [  112.523826] EAX: 00000001 EBX: daa5b510 ECX: 6b6b6b6b EDX: 00000000
> [  112.523922] ESI: 00000002 EDI: ee4f9e84 EBP: dae63d2c ESP: dae63cbc
> [  112.524011]  DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068
> [  112.524011] Process nautilus (pid: 1486, ti=dae62000 task=daa5b510 task.ti=dae62000)
> [  112.524011] Stack:
> [  112.524011]  dae63d38 00000246 b026be79 00000000 00160007 00000006 dc198958 00000282
> [  112.524011]  daa5b528 daa5b950 b08ff1b0 00000000 b0afab18 00000001 00000000 000052d7
> [  112.524011]  ee802280 ef513308 dc198e60 dc198958 00000282 dc198000 00160006 b0ca9414
> [  112.524011] Call Trace:
> [  112.524011]  [<b026be79>] ? kobject_release+0x49/0x90
> [  112.524011]  [<b01597cb>] lock_acquire+0x7b/0x90
> [  112.524011]  [<b0182b62>] ? bdi_lock_two+0x22/0x50
> [  112.524011]  [<b055ef2a>] _raw_spin_lock_nested+0x3a/0x50
> [  112.524011]  [<b0182b62>] ? bdi_lock_two+0x22/0x50
> [  112.524011]  [<b0182b62>] bdi_lock_two+0x22/0x50
> [  112.524011]  [<b01c7dde>] bdev_inode_switch_bdi+0x2e/0xa0
> [  112.524011]  [<b01c8baf>] __blkdev_put+0xbf/0x160
> [  112.524011]  [<b01c8be3>] __blkdev_put+0xf3/0x160
> [  112.524011]  [<b01c8c92>] blkdev_put+0x42/0x120
> [  112.524011]  [<b019d66f>] kill_block_super+0x3f/0x70
> [  112.524011]  [<b019df1d>] deactivate_locked_super+0x3d/0x70
> [  112.524011]  [<b019e890>] deactivate_super+0x50/0x70
> [  112.524011]  [<b01b5a38>] mntput_no_expire+0x68/0xa0
> [  112.524011]  [<b01b5a83>] mntput+0x13/0x30
> [  112.524011]  [<b01a4525>] path_put+0x15/0x20
> [  112.524011]  [<b01a574d>] terminate_walk+0x4d/0x60
> [  112.524011]  [<b01a769f>] do_last+0x60f/0x6d0
> [  112.524011]  [<b01a77f8>] path_openat+0x98/0x320
> [  112.524011]  [<b0159317>] ? lock_release_non_nested+0x57/0x2e0
> [  112.524011]  [<b01a7b60>] do_filp_open+0x30/0x80
> [  112.524011]  [<b055f75d>] ? _raw_spin_unlock+0x1d/0x30
> [  112.524011]  [<b01b404c>] ? alloc_fd+0xbc/0x100
> [  112.524011]  [<b019ac61>] do_sys_open+0xf1/0x1c0
> [  112.524011]  [<b019ad99>] sys_open+0x29/0x40
> [  112.524011]  [<b055ff57>] sysenter_do_call+0x12/0x36

This Oops is still happening in 3.1.0-rc5.

-- 
Sitsofe | http://sucs.org/~sits/
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