Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755133AbaDKWSm (ORCPT ); Fri, 11 Apr 2014 18:18:42 -0400 Received: from terminus.zytor.com ([198.137.202.10]:48367 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752575AbaDKWSk (ORCPT ); Fri, 11 Apr 2014 18:18:40 -0400 Message-ID: <53486A30.80909@zytor.com> Date: Fri, 11 Apr 2014 15:18:24 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.4.0 MIME-Version: 1.0 To: Andy Lutomirski , "H. Peter Anvin" CC: Brian Gerst , Ingo Molnar , Linux Kernel Mailing List , Linus Torvalds , Thomas Gleixner , stable@vger.kernel.org Subject: Re: [tip:x86/urgent] x86-64, modify_ldt: Ban 16-bit segments on 64-bit kernels References: <53483487.6030103@zytor.com> <53485BB8.1000106@mit.edu> <53485D95.9030301@zytor.com> <5348643F.1020405@mit.edu> <534865DF.2090703@linux.intel.com> In-Reply-To: X-Enigmail-Version: 1.6 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 On 04/11/2014 03:15 PM, Andy Lutomirski wrote: > > I just looked up my hideous code. I was doing this to test the > now-deleted int 0xcc vsyscall stuff. I used modify_ldt because either > I didn't realize that __USER32_CS was usable or I didn't think it was > ABI. Or I was just being silly. > > But yes, breaking my hack would not matter. :) > Either way, it wouldn't break it. -hpa -- 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/