From: Vegard Nossum <vegard.nossum@oracle.com>
Date: Thu, 5 Sep 2013 11:00:14 +0000 (+0200)
Subject: xen/blkback: fix reference counting
X-Git-Tag: v3.13-rc1~100^2~37
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ea5ec76d76da9279d12027c1828544c5ccbe7932;p=pandora-kernel.git

xen/blkback: fix reference counting

If the permission check fails, we drop a reference to the blkif without
having taken it in the first place. The bug was introduced in commit
604c499cbbcc3d5fe5fb8d53306aa0fae1990109 (xen/blkback: Check device
permissions before allowing OP_DISCARD).

Cc: stable@vger.kernel.org
Cc: Jan Beulich <JBeulich@suse.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

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