diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index 9a26ac07e324..b6fc33ddb228 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -1027,6 +1027,9 @@ static int regex_match_full(char *str, struct regex *r, int len)
 	if (!len)
 		return strcmp(str, r->pattern) == 0;
 
+	if (len < r->len)
+		return 0;
+
 	return strncmp(str, r->pattern, len) == 0;
 }