cgroups/cgfsng: rework cgfsng_num_hierarchies()

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
lxc · Dec 7, 2019 · e3ffb28 · e3ffb28
1 parent 52d08ab
commit e3ffb28
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/lxc/cgroups/cgfsng.c b/src/lxc/cgroups/cgfsng.c
@@ -1966,6 +1966,9 @@ __cgfsng_ops static int cgfsng_num_hierarchies(struct cgroup_ops *ops)
 {
 	int i = 0;
 
+	if (!ops)
+		return ret_set_errno(-1, ENOENT);
+
 	if (!ops->hierarchies)
 		return 0;