--- cddl/contrib/opensolaris/lib/libzfs/common/libzfs_mount.c	(revision 349903)
+++ cddl/contrib/opensolaris/lib/libzfs/common/libzfs_mount.c	(working copy)
@@ -1286,7 +1286,8 @@ 
 static boolean_t
 libzfs_path_contains(const char *path1, const char *path2)
 {
-	return (strstr(path2, path1) == path2 && path2[strlen(path1)] == '/');
+	return (strcmp(path1, path2) == 0 || strcmp(path1, "/") == 0 ||
+	    (strstr(path2, path1) == path2 && path2[strlen(path1)] == '/'));
 }