diff --git a/ipc/shm.c b/ipc/shm.c
index 7efff043ffbf48a964f5dc5e7284c6dc9d9c507c..b5bae9d945b62103ad8924ecf17dee8ee18a728c 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -304,6 +304,9 @@ void exit_shm(struct task_struct *task)
 {
 	struct ipc_namespace *ns = task->nsproxy->ipc_ns;
 
+	if (shm_ids(ns).in_use == 0)
+		return;
+
 	/* Destroy all already created segments, but not mapped yet */
 	down_write(&shm_ids(ns).rw_mutex);
 	if (shm_ids(ns).in_use)