From 96c1cc6c19103fbe2c617c212fa7c925488f81af Mon Sep 17 00:00:00 2001
From: Enji Cooper <ngie@FreeBSD.org>
Date: Fri, 10 Jun 2016 18:10:32 +0000
Subject: [PATCH] MFC r299510: r299510 (by cem):

libmp: Fix trivial buffer overrun

fgetln yields a non-NUL-terminated buffer and its length.  This routine
attempted to NUL-terminate it, but did not allocate space for the NUL.  So,
allocate space for the NUL.

CID:		1017457
---
 lib/libmp/mpasbn.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/libmp/mpasbn.c b/lib/libmp/mpasbn.c
index bc5556dfb080..2656124c4738 100644
--- a/lib/libmp/mpasbn.c
+++ b/lib/libmp/mpasbn.c
@@ -286,10 +286,10 @@ mp_min(MINT *mp)
 	line = fgetln(stdin, &linelen);
 	if (line == NULL)
 		MPERR(("min"));
-	nline = malloc(linelen);
+	nline = malloc(linelen + 1);
 	if (nline == NULL)
 		MPERR(("min"));
-	strncpy(nline, line, linelen);
+	memcpy(nline, line, linelen);
 	nline[linelen] = '\0';
 	rmp = _dtom("min", nline);
 	_movem("min", rmp, mp);