1 files changed, 6 insertions, 2 deletions

diff --git a/kernel/events/core.c b/kernel/events/core.c
index d3b9df5962c..58690af323e 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -3558,9 +3558,13 @@ static void ring_buffer_wakeup(struct perf_event *event)
 
         rcu_read_lock();
         rb = rcu_dereference(event->rb);
-        list_for_each_entry_rcu(event, &rb->event_list, rb_entry) {
+        if (!rb)
+                goto unlock;
+
+        list_for_each_entry_rcu(event, &rb->event_list, rb_entry)
                 wake_up_all(&event->waitq);
-        }
+
+unlock:
         rcu_read_unlock();
 }