From: James Bottomley <James.Bottomley@suse.de>
Date: Sun, 1 May 2011 14:42:07 +0000 (-0500)
Subject: [SCSI] fix oops in scsi_run_queue()
X-Git-Tag: v2.6.39-rc7~11^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c055f5b2614b4f758ae6cc86733f31fa4c2c5844;p=pandora-kernel.git

[SCSI] fix oops in scsi_run_queue()

The recent commit closing the race window in device teardown:

commit 86cbfb5607d4b81b1a993ff689bbd2addd5d3a9b
Author: James Bottomley <James.Bottomley@suse.de>
Date:   Fri Apr 22 10:39:59 2011 -0500

    [SCSI] put stricter guards on queue dead checks

is causing a potential NULL deref in scsi_run_queue() because the
q->queuedata may already be NULL by the time this function is called.
Since we shouldn't be running a queue that is being torn down, simply
add a NULL check in scsi_run_queue() to forestall this.

Tested-by: Jim Schutt <jaschut@sandia.gov>
Cc: stable@kernel.org
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
---

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