Handle empty regular expression in substitution, found by ossfuzz.

2026-04-16 03:56:28 +00:00 · 2026-04-02 08:45:35 +00:00
parent 8b51abef08
commit 1a51193899
1 changed files with 2 additions and 0 deletions
--- a/regsub.c
+++ b/regsub.c
@@ -68,6 +68,8 @@ regsub(const char *pattern, const char *with, const char *text, int flags)

 	if (*text == '\0')
 		return (xstrdup(""));
+	if (*pattern == '\0')
+		return (xstrdup(text));
 	if (regcomp(&r, pattern, flags) != 0)
 		return (NULL);