1 files changed, 9 insertions, 0 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 6620432491f6..3eaf91b104e9 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -263,6 +263,15 @@ static void event_function_call(struct perf_event *event, event_f func, void *da
 		.data = data,
 	};
 
+	if (!event->parent) {
+		/*
+		 * If this is a !child event, we must hold ctx::mutex to
+		 * stabilize the the event->ctx relation. See
+		 * perf_event_ctx_lock().
+		 */
+		lockdep_assert_held(&ctx->mutex);
+	}
+
 	if (!task) {
 		cpu_function_call(event->cpu, event_function, &efs);
 		return;