From: brynet <brynet@openbsd.org>
Date: Thu, 13 Apr 2017 18:36:51 +0000 (+0000)
Subject: Use recallocarray in getdelim/getline to clear memory on buffer resizes,
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=fa826e3f7e01ed0795ae97fd2c6c675f1be3392d;p=openbsd

Use recallocarray in getdelim/getline to clear memory on buffer resizes,
inspired by a similar change to fgetln.

ok deraadt millert
---

diff --git a/lib/libc/stdio/getdelim.c b/lib/libc/stdio/getdelim.c
index 0e0e338328c..d709a3d18e1 100644
--- a/lib/libc/stdio/getdelim.c
+++ b/lib/libc/stdio/getdelim.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: getdelim.c,v 1.5 2016/09/21 04:38:56 guenther Exp $	*/
+/*	$OpenBSD: getdelim.c,v 1.6 2017/04/13 18:36:51 brynet Exp $	*/
 /* $NetBSD: getdelim.c,v 1.13 2011/07/22 23:12:30 joerg Exp $ */
 
 /*
@@ -103,7 +103,7 @@ getdelim(char **__restrict buf, size_t *__restrict buflen,
 				newlen++;
 			}
 
-			newb = realloc(*buf, newlen);
+			newb = recallocarray(*buf, *buflen, newlen, 1);
 			if (newb == NULL)
 				goto error;
 			*buf = newb;