Don't try to access memory outside string

php · Mar 28, 2022 · 2119ba2 · 2119ba2
1 parent 5a8622f
commit 2119ba2
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/ext/filter/logical_filters.c b/ext/filter/logical_filters.c
@@ -509,7 +509,7 @@ static int _php_filter_validate_domain(char * domain, size_t len, zend_long flag
 	t = e - 1;
 
 	/* Ignore trailing dot */
-	if (*t == '.') {
+	if (l > 0 && *t == '.') {
 		e = t;
 		l--;
 	}