Received: by 2002:ac0:a581:0:0:0:0:0 with SMTP id m1-v6csp850622imm; Wed, 4 Jul 2018 07:05:28 -0700 (PDT) X-Google-Smtp-Source: AAOMgpfZrOrG60jaZtvImE70OIcgiz601wcLTFaUpEQNKh9c1HjKfd5JuP8CMh1tpfcqdlAPhyw1 X-Received: by 2002:a62:3d41:: with SMTP id k62-v6mr2359416pfa.35.1530713128143; Wed, 04 Jul 2018 07:05:28 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1530713128; cv=none; d=google.com; s=arc-20160816; b=eDHQ7SIrg9j6ZIajE/lBelLvAgfh8OXGoZK5MAdDL2nOFxm4TOxeSJ7jvImxKkGN4L sS9I1F6wIEefVYq18P9EVvUBHUG49fzdOXLBHA4Dk/jiTq+h9hNlxOdqAU0Mvmfp6cq2 S8V8g1TNLeNIX89X5S9fGv0KUqoQsbmr0FOhr/bxP/a8c7lgFrOHnyypcRuKmvEESIAM zsqh8u40IUQRZRaZpeeCjAfwzy7Mqhiivmo5nn3M/acIWMWUkKiTWUvIXH82oR/3RsLc DE71mL/4u6VvwgtBxw/Oc3KQq7FQYk0RWpfuIJqimuWKosiXY7I78Rbnq45O3X88f+dV 2Krw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:arc-authentication-results; bh=57jf7a+HyqEUsRVi2EikDU9XqXqGgx0XfWPvsRoNIbg=; b=w8rLx+3SkkzWGeBVY7QhN158oY8tN5madd+iZmIvJWi7XNYgKB69cNgJh8U2Kf3CNo qLgw4wQRMI3fOCa6sCiJPnXsuYknQvyTb+fjEAFE3gXtuAxuNs9wAQGmyxss/hM/LKzn rq2RuN5PeD6MIXXDzTulcqqp3byMrQoZ8lTe9XAbyN1u97Nja/rXNAwwJ6WLNae3imVN a1oK1kibfhRnTd/jOlMCuU2uJHqZjQ6QJpSrkpOaTd4ed11iGQ8y73LdYX3zraw0ChsW YFoJSMZw6HCPWLnU9plj8x7H5GB502/oIbRzfVKF+11PeKqhnScc4JDWQFAFodtDp/iU 71AA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id e9-v6si3358587pgn.576.2018.07.04.07.05.11; Wed, 04 Jul 2018 07:05:28 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752772AbeGDOD0 (ORCPT + 99 others); Wed, 4 Jul 2018 10:03:26 -0400 Received: from foss.arm.com ([217.140.101.70]:37866 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752197AbeGDODY (ORCPT ); Wed, 4 Jul 2018 10:03:24 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 481BC18A; Wed, 4 Jul 2018 07:03:24 -0700 (PDT) Received: from edgewater-inn.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 195303F5A0; Wed, 4 Jul 2018 07:03:24 -0700 (PDT) Received: by edgewater-inn.cambridge.arm.com (Postfix, from userid 1000) id 0D4F11AE189D; Wed, 4 Jul 2018 15:04:04 +0100 (BST) Date: Wed, 4 Jul 2018 15:04:04 +0100 From: Will Deacon To: Kees Cook Cc: Laura Abbott , Mark Rutland , Ard Biesheuvel , Kernel Hardening , LKML , linux-arm-kernel , Alexander Popov , Catalin Marinas Subject: Re: [PATCH] arm64: Clear the stack Message-ID: <20180704140403.GE4828@arm.com> References: <20180629190553.7282-1-labbott@redhat.com> <706dc06b-0157-89cb-33a6-d0b9d811dcf0@redhat.com> <20180702095931.GB28665@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Kees, On Mon, Jul 02, 2018 at 10:29:24AM -0700, Kees Cook wrote: > On Mon, Jul 2, 2018 at 2:59 AM, Will Deacon wrote: > > On Fri, Jun 29, 2018 at 01:25:20PM -0700, Kees Cook wrote: > >> No worries! I've made the change locally and will push this out to > >> -next unless there are objections? > > > > I'm a bit wary of conflicts in entry.S, since it's likely that we're going > > to have a lot going on in there for 4.19. > > > > Could I take this via arm64 instead, please, or are there dependencies > > on other parts of your tree? > > It depends on the plugin existing, but we could split it up so the > arm64 part could go separately. It would just be a no-op in the arm64 > tree since CONFIG_GCC_PLUGIN_STACKLEAK won't exist there. Whatever > works best for you! If you could split it up then that would be really helpful, please. Thanks, Will