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Date: Thu, 6 Mar 2003 22:58:09 +0100 (MET)
From: Andreas Klein <asklein@cip.physik.uni-wuerzburg.de>
To: linux-kernel@vger.kernel.org
cc: torvalds@transmeta.com, mantel@suse.de
Subject: ioremap off by one bug
Message-ID: <Pine.GHP.4.21.0303062253390.5677-100000@wpax13.physik.uni-wuerzburg.de>
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Hello,

we have found an off by one bug in ioremap.
The following patch fixes the problem.

--- arch/i386/mm/ioremap.c.orig	2003-03-06 23:16:12.000000000 +0100
+++ arch/i386/mm/ioremap.c	2003-03-06 23:16:30.000000000 +0100
@@ -142,7 +142,7 @@
 	 */
 	offset = phys_addr & ~PAGE_MASK;
 	phys_addr &= PAGE_MASK;
-	size = PAGE_ALIGN(last_addr) - phys_addr;
+	size = PAGE_ALIGN(last_addr+1) - phys_addr;
 
 	/*
 	 * Ok, go for it..


bye,

-- Andreas Klein
   asklein@cip.physik.uni-wuerzburg.de
   root / webmaster @cip.physik.uni-wuerzburg.de
   root / webmaster @www.physik.uni-wuerzburg.de
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