--- x/kernel/trace/trace_events_filter.c
+++ y/kernel/trace/trace_events_filter.c
@@ -1429,6 +1429,7 @@ static void filter_free_subsystem_filter
 	struct trace_event_file *file;
 	struct filter_head *head;
 	struct filter_list *item;
+	int free_filter = 1;
 
 	head = kmalloc(sizeof(*head), GFP_KERNEL);
 	if (!head)
@@ -1442,6 +1443,7 @@ static void filter_free_subsystem_filter
 
 	item->filter = filter;
 	list_add_tail(&item->list, &head->list);
+	free_filter = 0;
 
 	list_for_each_entry(file, &tr->events, list) {
 		if (file->system != dir)
@@ -1467,7 +1469,8 @@ static void filter_free_subsystem_filter
 			continue;
 		__free_subsystem_filter(file);
 	}
-	__free_filter(filter);
+	if (free_filter)
+		__free_filter(filter);
 }
 
 int filter_assign_type(const char *type)