From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964958Ab3GLW2d (ORCPT ); Fri, 12 Jul 2013 18:28:33 -0400 Received: from terminus.zytor.com ([198.137.202.10]:41749 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753185Ab3GLW2c (ORCPT ); Fri, 12 Jul 2013 18:28:32 -0400 Message-ID: <51E082F6.4030305@zytor.com> Date: Fri, 12 Jul 2013 15:28:06 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130625 Thunderbird/17.0.7 MIME-Version: 1.0 To: Kees Cook CC: linux-kernel@vger.kernel.org, Thomas Gleixner , Ingo Molnar , x86@kernel.org, Borislav Petkov , Fenghua Yu , Yinghai Lu , Seiji Aguchi , PaX Team Subject: Re: [PATCH] x86: make sure IDT is page aligned References: <20130712183014.GA20551@www.outflux.net> In-Reply-To: <20130712183014.GA20551@www.outflux.net> X-Enigmail-Version: 1.5.1 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07/12/2013 11:30 AM, Kees Cook wrote: > > - .word 0 # 32-bit align idt_desc.address > + .word PAGE_SIZE # page align idt_desc.address > ... and this is totally confused. This didn't change alignment one iota, it only put the value 4096 into the padding. -hpa