1 files changed, 3 insertions, 0 deletions

diff --git a/ipc/shm.c b/ipc/shm.c
index 7efff043ffbf..b5bae9d945b6 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)