Index: dm_target_snapshot.c
===================================================================
RCS file: /cvsroot/src/sys/dev/dm/dm_target_snapshot.c,v
retrieving revision 1.16
diff -u -r1.16 dm_target_snapshot.c
--- dm_target_snapshot.c	14 Jun 2014 07:39:00 -0000	1.16
+++ dm_target_snapshot.c	17 Aug 2014 18:00:37 -0000
@@ -221,8 +221,7 @@
 	if ((dmp_snap = dm_pdev_insert(argv[0])) == NULL)
 		return ENOENT;
 
-	if ((tsc = kmem_alloc(sizeof(dm_target_snapshot_config_t), KM_NOSLEEP))
-	    == NULL)
+	if ((tsc = kmem_alloc(sizeof(*tsc), KM_NOSLEEP)) == NULL)
 		return 1;
 
 	tsc->tsc_persistent_dev = 0;
@@ -232,8 +231,10 @@
 		tsc->tsc_persistent_dev = 1;
 
 		/* Insert cow device to global pdev list */
-		if ((dmp_cow = dm_pdev_insert(argv[1])) == NULL)
+		if ((dmp_cow = dm_pdev_insert(argv[1])) == NULL) {
+			kmem_free(tsc, sizeof(*tsc));
 			return ENOENT;
+		}
 	}
 	tsc->tsc_chunk_size = atoi(argv[3]);