linux-kernel - [22/59] dm mpath: fix NULL pointer dereference when path parameters missing

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Date:	Tue, 24 Aug 2010 15:24:34 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Patrick LoPresti <lopresti@...il.com>,
	Alasdair G Kergon <agk@...hat.com>
Subject: [22/59] dm mpath: fix NULL pointer dereference when path parameters missing

2.6.32-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Alasdair G Kergon <agk@...hat.com>

commit 6bbf79a14080a0c61212f53b4b87dc1a99fedf9c upstream.

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

Signed-off-by: Patrick LoPresti <lopresti@...il.com>
Signed-off-by: Alasdair G Kergon <agk@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/md/dm-mpath.c |    1 +
 1 file changed, 1 insertion(+)

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


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