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 44275C43603 for ; Wed, 18 Dec 2019 16:35:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 145672465E for ; Wed, 18 Dec 2019 16:35:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="eFouNkPT" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727585AbfLRQfs (ORCPT ); Wed, 18 Dec 2019 11:35:48 -0500 Received: from mail-ed1-f66.google.com ([209.85.208.66]:46506 "EHLO mail-ed1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726980AbfLRQfr (ORCPT ); Wed, 18 Dec 2019 11:35:47 -0500 Received: by mail-ed1-f66.google.com with SMTP id m8so2146398edi.13 for ; Wed, 18 Dec 2019 08:35:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=FMqMKRVCOcjZgE/EV3cPuX6L8AH27Rm+Sh8f62ETxcQ=; b=eFouNkPT+BVqLskLEk9g7X/YCueGVws1Y4L7OAdK67iYfuw5Q3JA28QRS8d/LWFrDG 1PI0GaIys/kiZnyYwXJr83Bv5EsUHu3bADQCvrKc+yqTejvNWp7QIJtShLaEEWXU6HZS gtG2/bpkanXeXAJmHX5+l8j7bSOHLYl8HcMu0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=FMqMKRVCOcjZgE/EV3cPuX6L8AH27Rm+Sh8f62ETxcQ=; b=PvD3D2D9LShU8JU0wJUUDwUSX1QSlWvhroDjbrPbW82x3RgMQbo8hBID/8cE+xaf4V hInhJ4xpz+SkmVrUVjFXGYnzm51jKDDecFq3YyKSIma0vaTLC7/lNK8WwADZ8WWCJgdO HAxegxZNzj0Tu3KthndrJlr4HDYnrauEvH/c3j2uyoICHL756KYeJEW5YA4fRYrjV7xu u4ou9Dk2rca4Z35obxwtGoCEVf3YHhzy/Sf9sgJnWVdcNwctSovni4pyXqBGUhRB7h+0 +xXdiylp6egj4cR+AcZntykmaRP5HQ0YeeNN/RhshfumkMqS0B6YKl7xjBi7AqB9ErGM rheg== X-Gm-Message-State: APjAAAUaOvUXyHriVZvdAn2+tuSySFbbkdgOVZhu0euvyTHkpx2ehIW1 kwfQdsK3uudop1m27Aegwqmw3DlYqOQ= X-Google-Smtp-Source: APXvYqxGm5RrfopgB3U7Ca9ms+6aJKnScObGgsY0uXMDlLXQK6wGvaY9/VhA2SbP6B1aGExzlrjRhQ== X-Received: by 2002:a17:906:7fd0:: with SMTP id r16mr3565126ejs.319.1576686945381; Wed, 18 Dec 2019 08:35:45 -0800 (PST) Received: from mail-wr1-f45.google.com (mail-wr1-f45.google.com. [209.85.221.45]) by smtp.gmail.com with ESMTPSA id y4sm50647edl.11.2019.12.18.08.35.43 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 18 Dec 2019 08:35:44 -0800 (PST) Received: by mail-wr1-f45.google.com with SMTP id q6so2965788wro.9 for ; Wed, 18 Dec 2019 08:35:43 -0800 (PST) X-Received: by 2002:a5d:51cc:: with SMTP id n12mr3908491wrv.177.1576686943371; Wed, 18 Dec 2019 08:35:43 -0800 (PST) MIME-Version: 1.0 References: <20191205000957.112719-1-thgarnie@chromium.org> <20191205000957.112719-2-thgarnie@chromium.org> <20191218124604.GE24886@zn.tnic> In-Reply-To: <20191218124604.GE24886@zn.tnic> From: Thomas Garnier Date: Wed, 18 Dec 2019 08:35:32 -0800 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v10 01/11] x86/crypto: Adapt assembly for PIE support To: Borislav Petkov Cc: Kernel Hardening , Kristen Carlson Accardi , Kees Cook , Herbert Xu , "David S. Miller" , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , "the arch/x86 maintainers" , Linux Crypto Mailing List , LKML Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Dec 18, 2019 at 4:46 AM Borislav Petkov wrote: > > On Wed, Dec 04, 2019 at 04:09:38PM -0800, Thomas Garnier wrote: > > Change the assembly code to use only relative references of symbols for the > > kernel to be PIE compatible. > > > > Position Independent Executable (PIE) support will allow to extend the > > KASLR randomization range below 0xffffffff80000000. > > FFS, how many times do we have to talk about this auto-sprinkled > sentence?! > > https://lkml.kernel.org/r/20190805163202.GD18785@zn.tnic In the last discussion, we mentioned Ingo (and other people) asked us to include more information for context. I don't care about having it or not, just want to ensure people understand why the change is made. > > -- > Regards/Gruss, > Boris. > > https://people.kernel.org/tglx/notes-about-netiquette