1 files changed, 4 insertions, 2 deletions

diff --git a/ipc/sem.c b/ipc/sem.c
index a37aaeb02561..178f303deea5 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -2123,9 +2123,11 @@ void exit_sem(struct task_struct *tsk)
                 ipc_assert_locked_object(&sma->sem_perm);
                 list_del(&un->list_id);
 
-                spin_lock(&ulp->lock);
+                /* we are the last process using this ulp, acquiring ulp->lock
+                 * isn't required. Besides that, we are also protected against
+                 * IPC_RMID as we hold sma->sem_perm lock now
+                 */
                 list_del_rcu(&un->list_proc);
-                spin_unlock(&ulp->lock);
 
                 /* perform adjustments registered in un */
                 for (i = 0; i < sma->sem_nsems; i++) {