From: Mikulas Patocka <mpatocka@redhat.com>
Date: Mon, 21 Jul 2008 11:00:24 +0000 (+0100)
Subject: dm mpath: free path selector on invalid args
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=371b2e348b7731a548b0a7432ca2ba32e90dd16f;p=openwrt%2Fstaging%2Fblogic.git

dm mpath: free path selector on invalid args

Free path selector if the arguments are invalid.

This command (note that it is invalid) causes reference leak on module
"dm_round_robin" and prevents the module from being removed.

dmsetup create --table '0 2 multipath 0 0 1 1 round-robin /dev/sdh' mpath0

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
---

diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index 9f7302d4878d..9f570b2ab7b4 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -525,8 +525,10 @@ static int parse_path_selector(struct arg_set *as, struct priority_group *pg,
 	}
 
 	r = read_param(_params, shift(as), &ps_argc, &ti->error);
-	if (r)
+	if (r) {
+		dm_put_path_selector(pst);
 		return -EINVAL;
+	}
 
 	r = pst->create(&pg->ps, ps_argc, as->argv);
 	if (r) {