Differential D32306 Diff 96299 lib/libc/secure/memmove_chk.c

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lib/libc/secure/memmove_chk.c

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				/* $NetBSD: memmove_chk.c,v 1.6 2020/09/05 13:37:59 mrg Exp $ */

				/*-
				* Copyright (c) 2006 The NetBSD Foundation, Inc.
				* All rights reserved.
				*
				* This code is derived from software contributed to The NetBSD Foundation
				* by Christos Zoulas.
				*
				* Redistribution and use in source and binary forms, with or without
				* modification, are permitted provided that the following conditions
				* are met:
				* 1. Redistributions of source code must retain the above copyright
				* notice, this list of conditions and the following disclaimer.
				* 2. Redistributions in binary form must reproduce the above copyright
				* notice, this list of conditions and the following disclaimer in the
				* documentation and/or other materials provided with the distribution.
				*
				* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
				* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
				* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
				* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
				* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
				* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
				* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
				* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
				* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
				* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
				* POSSIBILITY OF SUCH DAMAGE.
				*/
				#include <sys/cdefs.h>
				__RCSID("$NetBSD: memmove_chk.c,v 1.6 2020/09/05 13:37:59 mrg Exp $");

				#include <string.h>

				#include <ssp/string.h>
				#undef memmove

				void *
				__memmove_chk(void dst, const void src, size_t len,
				size_t slen)
				{
				if (len > slen)
				__chk_fail();
				return (memmove(dst, src, len));
				}