From 1234cbbb41b6bf57c7094a5e9d015db7b303c44c Mon Sep 17 00:00:00 2001
From: "Pedro F. Giffuni" <pfg@FreeBSD.org>
Date: Fri, 21 Apr 2017 19:27:33 +0000
Subject: lib: initial use of reallocarray(3).

Make some use of reallocarray, attempting to limit it to cases where the
parameters are unsigned and there is some theoretical chance of overflow.

MFC afer:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D9980
---
 libutil/pw_util.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'libutil/pw_util.c')

diff --git a/libutil/pw_util.c b/libutil/pw_util.c
index e55c2b1..85b8d04 100644
--- a/libutil/pw_util.c
+++ b/libutil/pw_util.c
@@ -468,7 +468,7 @@ pw_copy(int ffd, int tfd, const struct passwd *pw, struct passwd *old_pw)
 			if (eof)
 				break;
 			while ((size_t)(q - p) >= size) {
-				if ((tmp = realloc(buf, size * 2)) == NULL) {
+				if ((tmp = reallocarray(buf, 2, size)) == NULL) {
 					warnx("passwd line too long");
 					goto err;
 				}
-- 
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