Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935549Ab3DISoH (ORCPT ); Tue, 9 Apr 2013 14:44:07 -0400 Received: from terminus.zytor.com ([198.137.202.10]:50915 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934733Ab3DISoF (ORCPT ); Tue, 9 Apr 2013 14:44:05 -0400 Message-ID: <51646054.3090509@zytor.com> Date: Tue, 09 Apr 2013 11:39:16 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130311 Thunderbird/17.0.4 MIME-Version: 1.0 To: Kees Cook CC: "kernel-hardening@lists.openwall.com" , Ingo Molnar , LKML , "x86@kernel.org" , Konrad Rzeszutek Wilk , Jeremy Fitzhardinge , Marcelo Tosatti , Alex Shi , Borislav Petkov , Alexander Duyck , Frederic Weisbecker , Steven Rostedt , "Paul E. McKenney" , "xen-devel@lists.xensource.com" , "virtualization@lists.linux-foundation.org" , Dan Rosenberg , Julien Tinnes , Will Drewry , Eric Northup Subject: Re: [kernel-hardening] Re: [PATCH] x86: make IDT read-only References: <20130408224328.GA17641@www.outflux.net> <51634935.9010905@zytor.com> <51645D6F.7070705@zytor.com> In-Reply-To: X-Enigmail-Version: 1.5.1 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 696 Lines: 27 On 04/09/2013 11:31 AM, Kees Cook wrote: >>> ... >>> 0xffff880001e00000-0xffff88001fe00000 480M RW PSE GLB NX pmd >>> >> >> That is the 1:1 memory map area... > > Meaning what? > > -Kees > That's the area in which we just map 1:1 to memory. Anything allocated with e.g. kmalloc() ends up with those addresses. -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/