diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index 638566ea78393ecfcc506e6e8a9e6513009193bb..2f57eb241ac9f56ec0cfe246eb052fd4aac498f6 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -4155,6 +4155,8 @@ static int parse_var_defs(struct hist_trigger_data *hist_data)
 
 			s = kstrdup(field_str, GFP_KERNEL);
 			if (!s) {
+				kfree(hist_data->attrs->var_defs.name[n_vars]);
+				hist_data->attrs->var_defs.name[n_vars] = NULL;
 				ret = -ENOMEM;
 				goto free;
 			}