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