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=-8.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL 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 50379C33CAF for ; Thu, 16 Jan 2020 18:14:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2CB9520684 for ; Thu, 16 Jan 2020 18:14:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="jhtLpi9W" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2395390AbgAPSOm (ORCPT ); Thu, 16 Jan 2020 13:14:42 -0500 Received: from mail-ua1-f68.google.com ([209.85.222.68]:43202 "EHLO mail-ua1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2395373AbgAPSOg (ORCPT ); Thu, 16 Jan 2020 13:14:36 -0500 Received: by mail-ua1-f68.google.com with SMTP id o42so7957170uad.10 for ; Thu, 16 Jan 2020 10:14:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=t4/SSgF43F8oOB5ed/Mu+sVQAJxuMOrgg0eXAd3RvzI=; b=jhtLpi9WlDS+egj1OpzohuuS9pQgMd5pKXv8LVi9TmM1esvDD/PbLI6+bFwE6vYUwl YbwYAIPyLL2iLWWFZ4ytb5/fY8kOXcb6A2/+9FD7Gi+C+JXHa3WLLW4PAc3A1LG6fGUB fcGO38CrloQAqONKKE9kyts4coCH7PcaZdcHpdbxmqab0w+fwQS/lEgAZr4mVDvHpJYZ zSX2xCdkYeoNMT4FCcjJ3ScoEaWXWSt7GQBFRFwgocvBKdk4BkZaxg5rW15RDuLSco8V obn4/UfOsChIVw5BO4a6LT+gT/AarmEyS+XJlpk0+EheBerIjl/hOt6iDgKZdetSZVhc J+nQ== 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=t4/SSgF43F8oOB5ed/Mu+sVQAJxuMOrgg0eXAd3RvzI=; b=QRdxgyuTe0s/y4LtfObxyaIyp8rJWRQl0SRSg3rv9NUL7peD2nCergVLcs7XyskU1Y Ah0A2a0LR37kYeMyfejgUY9mZ5AcPlGS7dxQUyYdhXqBHy7wsvAaF5kyJnrDma23Wa2F KjhdLWV189qJxeJKimDpKPGhdjfhLGal5Zc9p1nMwFvDYU26vU3EQVRrqrKFauolX+C9 9LU+R2+TzZwEx20CNvHMAOLM+iDg1/CAlGv1a4D4/o3k5GQacHBVwZv1rfLEjYGfbXXO svNoav03zqKEjejFQQHaf2lRvtC3m0XcTJepYozx5FRSq/GubxH4vF/kvinpCOXXIACH 4X7Q== X-Gm-Message-State: APjAAAXfm0VHggWtjGnBrtDWLWY40efwIgKMAIV4n4xeDlbTHW4amgD8 wbz6xKlFiiH382oJ0z+ciEn7BAkI5pQAlKHJApZwug== X-Google-Smtp-Source: APXvYqxIIWRmLZKLxckIhAMKbhmdzDCTkxbmnPMWtT8X50l5n92iMdw1uWSvaleMeLdpwMB55APzs6jyZJod3pJATys= X-Received: by 2002:ab0:422:: with SMTP id 31mr20481306uav.98.1579198475361; Thu, 16 Jan 2020 10:14:35 -0800 (PST) MIME-Version: 1.0 References: <20191018161033.261971-1-samitolvanen@google.com> <20191206221351.38241-1-samitolvanen@google.com> <20191206221351.38241-13-samitolvanen@google.com> <20200116174648.GE21396@willie-the-truck> In-Reply-To: <20200116174648.GE21396@willie-the-truck> From: Sami Tolvanen Date: Thu, 16 Jan 2020 10:14:24 -0800 Message-ID: Subject: Re: [PATCH v6 12/15] arm64: vdso: disable Shadow Call Stack To: Will Deacon Cc: Catalin Marinas , Steven Rostedt , Masami Hiramatsu , Ard Biesheuvel , Mark Rutland , Dave Martin , Kees Cook , Laura Abbott , Marc Zyngier , Nick Desaulniers , Jann Horn , Miguel Ojeda , Masahiro Yamada , clang-built-linux , Kernel Hardening , linux-arm-kernel , 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 Thu, Jan 16, 2020 at 9:46 AM Will Deacon wrote: > Should we be removing -ffixed-x18 too, or does that not propagate here > anyway? No, we shouldn't touch -ffixed-x18 here. The vDSO is always built with x18 reserved since commit 98cd3c3f83fbb ("arm64: vdso: Build vDSO with -ffixed-x18"). Sami 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=-0.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_ADSP_CUSTOM_MED,DKIM_SIGNED,DKIM_VALID,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 A51B5C33CAF for ; Thu, 16 Jan 2020 18:43:41 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 4778A2073A for ; Thu, 16 Jan 2020 18:43:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="L0hCLTLI"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=google.com header.i=@google.com header.b="jhtLpi9W" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4778A2073A Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:To:Subject:Message-ID:Date:From: In-Reply-To:References:MIME-Version:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Xpdd+B/bnOhTnhe3xMXNM9CV0/W9utxD8e37PwceFFA=; b=L0hCLTLIR1cjTL gGL6Ef+n/ZQ2WzOIUFreI9DLrnn4mZmwtSMd5s3Hk945aa61Ae14cNtgptV4sZR4l4jNCQl149EU8 NnHg99JiqgD/3cPGQ3H3CR043jjTTDHDUtmIRBlYsH4M7uK7B4FIrxycBTAPZmoT4DhLkI+bUajVX C922OSruqeqBXs03m0pbluaF6E4ZHBg2YlprZP8syIbmUA2zGY6ObNwzWEKlQ95oHLByNn+IPSMJc WwbkQKWHnppM2OhJY1xjXWqRDG4b9JxilkZkiFlbYqOQfXwPg4mvTGD4rXWRWszGPMh0Dz6eqDh8Y Z65iyxmv885iBXQ+e+/A==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1isA7I-0006SD-1l; Thu, 16 Jan 2020 18:43:40 +0000 Received: from mail-ua1-x942.google.com ([2607:f8b0:4864:20::942]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1is9fE-0005lW-7I for linux-arm-kernel@lists.infradead.org; Thu, 16 Jan 2020 18:14:46 +0000 Received: by mail-ua1-x942.google.com with SMTP id c14so7964664uaq.11 for ; Thu, 16 Jan 2020 10:14:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=t4/SSgF43F8oOB5ed/Mu+sVQAJxuMOrgg0eXAd3RvzI=; b=jhtLpi9WlDS+egj1OpzohuuS9pQgMd5pKXv8LVi9TmM1esvDD/PbLI6+bFwE6vYUwl YbwYAIPyLL2iLWWFZ4ytb5/fY8kOXcb6A2/+9FD7Gi+C+JXHa3WLLW4PAc3A1LG6fGUB fcGO38CrloQAqONKKE9kyts4coCH7PcaZdcHpdbxmqab0w+fwQS/lEgAZr4mVDvHpJYZ zSX2xCdkYeoNMT4FCcjJ3ScoEaWXWSt7GQBFRFwgocvBKdk4BkZaxg5rW15RDuLSco8V obn4/UfOsChIVw5BO4a6LT+gT/AarmEyS+XJlpk0+EheBerIjl/hOt6iDgKZdetSZVhc J+nQ== 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=t4/SSgF43F8oOB5ed/Mu+sVQAJxuMOrgg0eXAd3RvzI=; b=GQ3FEXFX0FinwgTJlq5lvFuddbIKFeFw6Fn+wK4oNauVOS6KDVe6nYatK6OMiYQh2U jaW1wl8L1GPiyuccYKaVS5++hFq8R9ezdXvKWT1QTUn71cXNeXIYMkH6O/iw03g9uRvc zq9TWm3+ONdVNB4R/21GKwGFasbByehS6epsd5NsGgdi9+qUpKMFdaTZQr1A9iB7YLPD WbSP9NNjHh0nxLc9SdtF1JeWDiCAji6x4/kLbo6xVRmuZjflVo8XTEFk6dXFS0OsSjuy HRK6NokyiqO2TemvKFcW/GFBiHti546P7DWtNX5Fs8rOPbyu0lPOoo/p6vXQJjk+UXi8 EoRg== X-Gm-Message-State: APjAAAWzlBqyqRdLa4TqGrjnx0hGA9sCxa8bOk1Dm1py1k6kq6uQyT11 wWm7Ych8Rkkay+5Im9BSQ9ZhYXWscTQ+Iy1DCgu3aw== X-Google-Smtp-Source: APXvYqxIIWRmLZKLxckIhAMKbhmdzDCTkxbmnPMWtT8X50l5n92iMdw1uWSvaleMeLdpwMB55APzs6jyZJod3pJATys= X-Received: by 2002:ab0:422:: with SMTP id 31mr20481306uav.98.1579198475361; Thu, 16 Jan 2020 10:14:35 -0800 (PST) MIME-Version: 1.0 References: <20191018161033.261971-1-samitolvanen@google.com> <20191206221351.38241-1-samitolvanen@google.com> <20191206221351.38241-13-samitolvanen@google.com> <20200116174648.GE21396@willie-the-truck> In-Reply-To: <20200116174648.GE21396@willie-the-truck> From: Sami Tolvanen Date: Thu, 16 Jan 2020 10:14:24 -0800 Message-ID: Subject: Re: [PATCH v6 12/15] arm64: vdso: disable Shadow Call Stack To: Will Deacon X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200116_101440_324225_36247EDB X-CRM114-Status: UNSURE ( 6.72 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Kees Cook , Ard Biesheuvel , Masahiro Yamada , Catalin Marinas , Jann Horn , Nick Desaulniers , LKML , Steven Rostedt , Miguel Ojeda , clang-built-linux , Masami Hiramatsu , Marc Zyngier , Kernel Hardening , Laura Abbott , Dave Martin , linux-arm-kernel Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Jan 16, 2020 at 9:46 AM Will Deacon wrote: > Should we be removing -ffixed-x18 too, or does that not propagate here > anyway? No, we shouldn't touch -ffixed-x18 here. The vDSO is always built with x18 reserved since commit 98cd3c3f83fbb ("arm64: vdso: Build vDSO with -ffixed-x18"). Sami _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel 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=-8.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL 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 A983EC33CB7 for ; Thu, 16 Jan 2020 18:14:55 +0000 (UTC) Received: from mother.openwall.net (mother.openwall.net [195.42.179.200]) by mail.kernel.org (Postfix) with SMTP id 119F02073A for ; Thu, 16 Jan 2020 18:14:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="jhtLpi9W" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 119F02073A Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kernel-hardening-return-17575-kernel-hardening=archiver.kernel.org@lists.openwall.com Received: (qmail 30320 invoked by uid 550); 16 Jan 2020 18:14:48 -0000 Mailing-List: contact kernel-hardening-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Received: (qmail 30292 invoked from network); 16 Jan 2020 18:14:47 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=t4/SSgF43F8oOB5ed/Mu+sVQAJxuMOrgg0eXAd3RvzI=; b=jhtLpi9WlDS+egj1OpzohuuS9pQgMd5pKXv8LVi9TmM1esvDD/PbLI6+bFwE6vYUwl YbwYAIPyLL2iLWWFZ4ytb5/fY8kOXcb6A2/+9FD7Gi+C+JXHa3WLLW4PAc3A1LG6fGUB fcGO38CrloQAqONKKE9kyts4coCH7PcaZdcHpdbxmqab0w+fwQS/lEgAZr4mVDvHpJYZ zSX2xCdkYeoNMT4FCcjJ3ScoEaWXWSt7GQBFRFwgocvBKdk4BkZaxg5rW15RDuLSco8V obn4/UfOsChIVw5BO4a6LT+gT/AarmEyS+XJlpk0+EheBerIjl/hOt6iDgKZdetSZVhc J+nQ== 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=t4/SSgF43F8oOB5ed/Mu+sVQAJxuMOrgg0eXAd3RvzI=; b=FTX2uwINAK+2kIGeTx/OJnUNueAs0F8ZMnvcbqChDgmuTFN0NTZf6CG+LWARsjbbZ4 bDPXs+NP1eDH/KMePZprpYJWNOfd0ERvODalPs2sxNIbnDBqTxPsTxFTHmQMk77c8Q5c KEgRZgCyzDeGL6KoPr4LlRaqDhN3bTUYD/AqodNCeVL3kVLdmxK59sBuujCp8yB73Nz3 /rmgSUAacH6df4DGYg5ORp+uz9waKllKQZeZKq8A1XAWYDJ8OT/FwbJz3SvMAlgQUbZK l4FPGtTsoHn06FrlbVWnvFQ0DPNl2g6MpnV/RiNbjBdRKS5vkHTsbLBftgfROMT9L9br lNrg== X-Gm-Message-State: APjAAAVhkQTqyPuB3bHZU0ZwHKWP1/yf3dK6xf7wALkLfrA8OZJtG/UU thKty4n3J2oUUcTZZ4GhjEXSbDpSqMauH3vHbQZkdg== X-Google-Smtp-Source: APXvYqxIIWRmLZKLxckIhAMKbhmdzDCTkxbmnPMWtT8X50l5n92iMdw1uWSvaleMeLdpwMB55APzs6jyZJod3pJATys= X-Received: by 2002:ab0:422:: with SMTP id 31mr20481306uav.98.1579198475361; Thu, 16 Jan 2020 10:14:35 -0800 (PST) MIME-Version: 1.0 References: <20191018161033.261971-1-samitolvanen@google.com> <20191206221351.38241-1-samitolvanen@google.com> <20191206221351.38241-13-samitolvanen@google.com> <20200116174648.GE21396@willie-the-truck> In-Reply-To: <20200116174648.GE21396@willie-the-truck> From: Sami Tolvanen Date: Thu, 16 Jan 2020 10:14:24 -0800 Message-ID: Subject: Re: [PATCH v6 12/15] arm64: vdso: disable Shadow Call Stack To: Will Deacon Cc: Catalin Marinas , Steven Rostedt , Masami Hiramatsu , Ard Biesheuvel , Mark Rutland , Dave Martin , Kees Cook , Laura Abbott , Marc Zyngier , Nick Desaulniers , Jann Horn , Miguel Ojeda , Masahiro Yamada , clang-built-linux , Kernel Hardening , linux-arm-kernel , LKML Content-Type: text/plain; charset="UTF-8" On Thu, Jan 16, 2020 at 9:46 AM Will Deacon wrote: > Should we be removing -ffixed-x18 too, or does that not propagate here > anyway? No, we shouldn't touch -ffixed-x18 here. The vDSO is always built with x18 reserved since commit 98cd3c3f83fbb ("arm64: vdso: Build vDSO with -ffixed-x18"). Sami