From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C056AC43215 for ; Wed, 13 Nov 2019 18:33:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EB418206D9 for ; Wed, 13 Nov 2019 18:33:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="gLQ0w0Ix" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728573AbfKMSdm (ORCPT ); Wed, 13 Nov 2019 13:33:42 -0500 Received: from mail-pg1-f194.google.com ([209.85.215.194]:37257 "EHLO mail-pg1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728373AbfKMSdm (ORCPT ); Wed, 13 Nov 2019 13:33:42 -0500 Received: by mail-pg1-f194.google.com with SMTP id z24so1897888pgu.4 for ; Wed, 13 Nov 2019 10:33:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=OhPSTTe4Xdz6gOjsaJlaEdC5pAfYubYxDCg4SrgVoSo=; b=gLQ0w0IxUEQnchYuilJR1nbU4m7SgY//cNaWQR/mt0lvyefOxSBkOsqifZytiwFIh0 GkBnn3qUVJAEMrTsVlq+svxxCP/slE/95ux0WpqRsVgnTHuEvwwCdJWa6c+0L9ne+iP7 6ydiQoWKF8IYJkGO42ArzjKHFxLH3sDY6CwOk= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=OhPSTTe4Xdz6gOjsaJlaEdC5pAfYubYxDCg4SrgVoSo=; b=GM1uOAgdvomErxWelaiyHhJMeHevzv3Ww1GQwoz1Wemo6H0mqM3nCrvYXnzG1CvyK0 Hl/cZLcNPVGfvhxZLacar/5dAqS9E8auhoTKM0YgwxLYV3vHkGWN7r1lbkK7u+Ka92+z sRvUz5W3y+rX1VfsOswJeHkUjdFbNYLWifnDbRjwN1Qlq1EGd/5HApszFRWWGsrkOdvc 5cogW106KyYTPlgUgHxl8EkBhlC661ypJWq/Q1A1y5C/0Q3e+dQeRuaLeaEzLMFfSHY4 mWxRdbBY5UIlP/uztLS3KMppxmb4rCt/VbCot7VDBXo/FhDhWywlZfMZmbg7kA2+i8a6 GG/w== X-Gm-Message-State: APjAAAWGpmMaAs8NToUw83mfDvvNxddks/vZ1/6RVre5mM7jZHr7xol3 Qgfw7FrnEq6CTaWqmUrUZFwyNA== X-Google-Smtp-Source: APXvYqyLkzEBHbWiCqJacPQ3CBKaBpCEr8iph2zitT6ozdOmqjw+YxPYFt/3IfvrDawkJj7K8FBEVg== X-Received: by 2002:a62:20e:: with SMTP id 14mr6074555pfc.153.1573670020389; Wed, 13 Nov 2019 10:33:40 -0800 (PST) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id k84sm5150717pfd.157.2019.11.13.10.33.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 Nov 2019 10:33:39 -0800 (PST) Date: Wed, 13 Nov 2019 10:33:38 -0800 From: Kees Cook To: Will Deacon Cc: Catalin Marinas , Mark Rutland , Sami Tolvanen , Steven Rostedt , Masami Hiramatsu , Ard Biesheuvel , Dave Martin , Laura Abbott , Marc Zyngier , Nick Desaulniers , Jann Horn , Miguel Ojeda , Masahiro Yamada , clang-built-linux@googlegroups.com, kernel-hardening@lists.openwall.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v5 00/14] add support for Clang's Shadow Call Stack Message-ID: <201911131033.435C8F77D@keescook> References: <20191018161033.261971-1-samitolvanen@google.com> <20191105235608.107702-1-samitolvanen@google.com> <201911121530.FA3D7321F@keescook> <20191113120337.GA26599@willie-the-truck> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191113120337.GA26599@willie-the-truck> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Nov 13, 2019 at 12:03:38PM +0000, Will Deacon wrote: > On Tue, Nov 12, 2019 at 03:44:42PM -0800, Kees Cook wrote: > > On Tue, Nov 05, 2019 at 03:55:54PM -0800, Sami Tolvanen wrote: > > > This patch series adds support for Clang's Shadow Call Stack > > > (SCS) mitigation, which uses a separately allocated shadow stack > > > to protect against return address overwrites. More information > > > > Will, Catalin, Mark, > > > > What's the next step here? I *think* all the comments have been > > addressed. Is it possible to land this via the arm tree for v5.5? > > I was planning to queue this for 5.6, given that I'd really like it to > spend some quality time in linux-next. Sounds fine to me; I just wanted to have an idea what to expect. :) Thanks! -- Kees Cook