From: Tejun Heo <tj@kernel.org>
Date: Mon, 1 Nov 2010 10:39:19 +0000 (+0100)
Subject: libata: fix NULL sdev dereference race in atapi_qc_complete()
X-Git-Tag: v2.6.37-rc2~21^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2a5f07b5ec098edc69e05fdd2f35d3fbb1235723;p=pandora-kernel.git

libata: fix NULL sdev dereference race in atapi_qc_complete()

SCSI commands may be issued between __scsi_add_device() and dev->sdev
assignment, so it's unsafe for ata_qc_complete() to dereference
dev->sdev->locked without checking whether it's NULL or not.  Fix it.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@kernel.org
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
---

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