diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c
index 06c62de9c71191a68e5ea5b97bcb3a46b707a60d..db95d8eb761b4f92c4722a2667fb258e7e2b64c8 100644
--- a/kernel/pid_namespace.c
+++ b/kernel/pid_namespace.c
@@ -318,7 +318,9 @@ static void *pidns_get(struct task_struct *task)
 	struct pid_namespace *ns;
 
 	rcu_read_lock();
-	ns = get_pid_ns(task_active_pid_ns(task));
+	ns = task_active_pid_ns(task);
+	if (ns)
+		get_pid_ns(ns);
 	rcu_read_unlock();
 
 	return ns;