From aaba0d344625ec1938a3b1e65d9cd427e64f1fe1 Mon Sep 17 00:00:00 2001 From: bcook Date: Mon, 8 Dec 2014 03:45:00 +0000 Subject: avoid left shift overflow in reallocarray. Some 64-bit platforms (e.g. Windows 64) have a 32-bit long. So, shifting 1UL 32-bits to the left causes an overflow. This replaces the constant 1UL with (size_t)1 so that we get the correct constant size for the platform. discussed with tedu@ & deraadt@ --- lib/libc/stdlib/reallocarray.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'lib/libc/stdlib/reallocarray.c') diff --git a/lib/libc/stdlib/reallocarray.c b/lib/libc/stdlib/reallocarray.c index 7accd99e006..ed3244e22f7 100644 --- a/lib/libc/stdlib/reallocarray.c +++ b/lib/libc/stdlib/reallocarray.c @@ -1,4 +1,4 @@ -/* $OpenBSD: reallocarray.c,v 1.1 2014/05/08 21:43:49 deraadt Exp $ */ +/* $OpenBSD: reallocarray.c,v 1.2 2014/12/08 03:45:00 bcook Exp $ */ /* * Copyright (c) 2008 Otto Moerbeek * @@ -24,7 +24,7 @@ * This is sqrt(SIZE_MAX+1), as s1*s2 <= SIZE_MAX * if both s1 < MUL_NO_OVERFLOW and s2 < MUL_NO_OVERFLOW */ -#define MUL_NO_OVERFLOW (1UL << (sizeof(size_t) * 4)) +#define MUL_NO_OVERFLOW ((size_t)1 << (sizeof(size_t) * 4)) void * reallocarray(void *optr, size_t nmemb, size_t size) -- cgit v1.2.3-59-g8ed1b