From: mickey <mickey@openbsd.org>
Date: Wed, 15 Mar 2000 15:58:40 +0000 (+0000)
Subject: prevent overflow in a diagnostic check; art@ ok
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=57e9bb923df363fbd3a8ebfd0b317fc7b2699744;p=openbsd

prevent overflow in a diagnostic check; art@ ok
---

diff --git a/sys/kern/subr_extent.c b/sys/kern/subr_extent.c
index 33e778911c1..592a0ffa73c 100644
--- a/sys/kern/subr_extent.c
+++ b/sys/kern/subr_extent.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: subr_extent.c,v 1.8 2000/02/15 16:30:28 art Exp $	*/
+/*	$OpenBSD: subr_extent.c,v 1.9 2000/03/15 15:58:40 mickey Exp $	*/
 /*	$NetBSD: subr_extent.c,v 1.7 1996/11/21 18:46:34 cgd Exp $	*/
 
 /*-
@@ -531,7 +531,7 @@ extent_alloc_subregion1(ex, substart, subend, size, alignment, skew, boundary,
 		    substart, subend);
 		panic("extent_alloc_subregion: bad subregion");
 	}
-	if ((size < 1) || (size > ((subend - substart) + 1))) {
+	if (size < 1 || (size - 1) > (subend - substart)) {
 		printf("extent_alloc_subregion: extent `%s', size 0x%lx\n",
 		    ex->ex_name, size);
 		panic("extent_alloc_subregion: bad size");