From: Jens Axboe <jens.axboe@oracle.com>
To: Florin Iucha <florin@iucha.net>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: kernel NULL pointer dereference in blk_rq_map_sg with v2.6.23-6815-g0895e91
Date: Tue, 23 Oct 2007 14:53:26 +0200 [thread overview]
Message-ID: <20071023125326.GX5059@kernel.dk> (raw)
In-Reply-To: <20071023125016.GK7918@iucha.net>
On Tue, Oct 23 2007, Florin Iucha wrote:
> On Tue, Oct 23, 2007 at 07:46:37AM -0500, Florin Iucha wrote:
> > [ 60.656136] Unable to handle kernel NULL pointer dereference at 0000000000000000 RIP:
> > [ 60.656143] [<ffffffff80375553>] blk_rq_map_sg+0x10d/0x17c
> > [ 60.656151] PGD 4640067 PUD 46d4067 PMD 0
> > [ 60.656154] Oops: 0000 [1] SMP
> > [ 60.656157] CPU 1
> > ...
>
> There was a DVD in the drive. After the OOPS, I cannot eject it
> via the button, and the "eject" command is stuck in "D" state:
>
> [ 436.308282] eject D ffffffff80571760 0 5336 5324
> [ 436.308285] ffff810007c35d08 0000000000000082 0000000000000000 ffff810007c35ca8
> [ 436.308288] ffff810006fb15f0 ffff810003062000 ffff810006fb17f8 0000000122222222
> [ 436.308292] 0000000000000003 ffff8100057e1070 0000000000000000 0000000000000000
> [ 436.308295] Call Trace:
> [ 436.308301] [<ffffffff80559137>] __mutex_lock_slowpath+0x133/0x23c
> [ 436.308306] [<ffffffff80559259>] mutex_lock+0x19/0x1d
> [ 436.308309] [<ffffffff802a35a0>] do_open+0x74/0x2d1
> [ 436.308313] [<ffffffff802a3a02>] blkdev_open+0x0/0x69
> [ 436.308315] [<ffffffff802a3a39>] blkdev_open+0x37/0x69
> [ 436.308319] [<ffffffff8027d68e>] __dentry_open+0xe6/0x1bd
> [ 436.308323] [<ffffffff8027d7fd>] nameidata_to_filp+0x2d/0x3f
> [ 436.308326] [<ffffffff8027d848>] do_filp_open+0x39/0x4b
> [ 436.308330] [<ffffffff8055a16d>] _spin_unlock+0x9/0xb
> [ 436.308333] [<ffffffff8027d58d>] get_unused_fd_flags+0x113/0x121
> [ 436.308337] [<ffffffff8027d8ab>] do_sys_open+0x51/0xd9
> [ 436.308341] [<ffffffff8027d95c>] sys_open+0x1b/0x1d
> [ 436.308343] [<ffffffff8020b77e>] system_call+0x7e/0x83
That's expected, the queue is hosed at that point.
--
Jens Axboe
prev parent reply other threads:[~2007-10-23 12:55 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-23 12:46 kernel NULL pointer dereference in blk_rq_map_sg with v2.6.23-6815-g0895e91 Florin Iucha
2007-10-23 12:47 ` Jens Axboe
2007-10-23 14:28 ` Jean Delvare
2007-10-23 18:45 ` Jens Axboe
2007-10-23 12:50 ` Florin Iucha
2007-10-23 12:53 ` Jens Axboe [this message]
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