Merge tag 'locking-core-2021-08-30' of git://git.kernel.org/pub/scm/linux/kernel...

[linux-2.6-microblaze.git] / kernel / trace / trace_events_hist.c

diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index 949ef09..a48aa2a 100644 (file)
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -3430,6 +3430,8 @@ trace_action_create_field_var(struct hist_trigger_data *hist_data,
                        event = data->match_data.event;
                }
 
+               if (!event)
+                       goto free;
                /*
                 * At this point, we're looking at a field on another
                 * event.  Because we can't modify a hist trigger on