From: Alasdair G Kergon <agk@redhat.com>
Date: Thu, 12 Aug 2010 03:13:49 +0000 (+0100)
Subject: dm mpath: fix NULL pointer dereference when path parameters missing
X-Git-Tag: v2.6.32.21~37
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=605a37bcc6f41f44d0093fec5f0816b5765f4e10;p=karo-tx-linux.git

dm mpath: fix NULL pointer dereference when path parameters missing

commit 6bbf79a14080a0c61212f53b4b87dc1a99fedf9c upstream.

multipath_ctr() forgets to return an error after detecting
missing path parameters.  Fix this.

Signed-off-by: Patrick LoPresti <lopresti@gmail.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index 32d0b878eccc..f336c6959082 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -691,6 +691,7 @@ static struct priority_group *parse_priority_group(struct arg_set *as,
 
 		if (as->argc < nr_params) {
 			ti->error = "not enough path parameters";
+			r = -EINVAL;
 			goto bad;
 		}