From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752282AbeERQHS (ORCPT ); Fri, 18 May 2018 12:07:18 -0400 Received: from mail.skyhub.de ([5.9.137.197]:39510 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751112AbeERQHO (ORCPT ); Fri, 18 May 2018 12:07:14 -0400 Date: Fri, 18 May 2018 18:06:38 +0200 From: Borislav Petkov To: "H. Peter Anvin" Cc: Ingo Molnar , Josh Poimboeuf , Linus Torvalds , Alexey Dobriyan , Peter Anvin , kernel test robot , Thomas Gleixner , Andrew Lutomirski , Brian Gerst , Denys Vlasenko , Peter Zijlstra , Linux Kernel Mailing List , tipbuild@zytor.com, LKP Subject: Re: [PATCH] objtool: Detect assembly code falling through to INT3 padding Message-ID: <20180518160638.GG17285@pd.tnic> References: <20180515214337.GA18021@avx2> <20180515222211.ods5hzne46hozojq@treble> <20180515224354.zmygmsnlqj5lrdbo@treble> <20180516033044.odb74pdgcn5nacwb@treble> <20180517134934.eog2fgoby5azq5a7@treble> <20180518071814.GB26358@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.3 (2018-01-21) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, May 18, 2018 at 12:27:15AM -0700, H. Peter Anvin wrote: > On 05/18/18 00:18, Ingo Molnar wrote: > > > > Ok, this is cool, it addresses the robustness problem that INT3 padding introduced > > very nicely. > > > > The concept of built-in kernel tooling working at the machine code level is just > > so powerful - we should have added our own KCC compiler 20 years ago. > > > > How many times has this been suggested? ;) Goes to show we still really need it. Imagine the simplifications and improvements we'll be able to do. Oh myyy.... /me has a wet dream. -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply. From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: multipart/mixed; boundary="===============2173992321510851725==" MIME-Version: 1.0 From: Borislav Petkov To: lkp@lists.01.org Subject: Re: [PATCH] objtool: Detect assembly code falling through to INT3 padding Date: Fri, 18 May 2018 18:06:38 +0200 Message-ID: <20180518160638.GG17285@pd.tnic> In-Reply-To: List-Id: --===============2173992321510851725== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable On Fri, May 18, 2018 at 12:27:15AM -0700, H. Peter Anvin wrote: > On 05/18/18 00:18, Ingo Molnar wrote: > > = > > Ok, this is cool, it addresses the robustness problem that INT3 padding= introduced = > > very nicely. > > = > > The concept of built-in kernel tooling working at the machine code leve= l is just = > > so powerful - we should have added our own KCC compiler 20 years ago. > > = > = > How many times has this been suggested? ;) Goes to show we still really need it. Imagine the simplifications and improvements we'll be able to do. Oh myyy.... /me has a wet dream. -- = Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply. --===============2173992321510851725==--