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=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 BFF33C3279B for ; Tue, 10 Jul 2018 19:39:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6FDE120BF2 for ; Tue, 10 Jul 2018 19:39:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=wylie.me.uk header.i=@wylie.me.uk header.b="lqJhgzWE" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6FDE120BF2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=wylie.me.uk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732797AbeGJTiZ (ORCPT ); Tue, 10 Jul 2018 15:38:25 -0400 Received: from wylie.me.uk ([82.68.155.94]:45264 "EHLO mail.wylie.me.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732245AbeGJTiZ (ORCPT ); Tue, 10 Jul 2018 15:38:25 -0400 X-Greylist: delayed 565 seconds by postgrey-1.27 at vger.kernel.org; Tue, 10 Jul 2018 15:38:25 EDT Received: from frodo.localnet (frodo.localnet [192.168.21.2]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wylie.me.uk (Postfix) with ESMTPS id 851D0120083; Tue, 10 Jul 2018 20:28:04 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=wylie.me.uk; s=mydkim005; t=1531250884; bh=AneZIymGh95LgxqAV4GKAZQX0hXFsWFiuC5Ke0EN2Oc=; h=From:To:Cc:Subject:References:Date:In-Reply-To; b=lqJhgzWEcp9RDSMxgrARf5mID5YCVMHfH99aP7LBwU+vHeF3IKSvp95QE9QrX2RR2 TGAwNaLLXCJWf0lonyDcQy1+6oOYGYn3JiXSKH4BTWcgJ65rGm9dAfmcAofEMEHljZ n6FQCLvhMeMtALYofYx9Vjz1LeXlXK+RMg+QgJgY9oRLVrpNDRB6fM5/s1rXmPFIdA ZkL4DA1qLfOqo91p3uP4ZCv8xriiqptyDhlBfUBq2YQ91gfMTErgYab6mGPaPGaJfI 9p2aKTLalXw5GsZatmTQD8mgC2761+HyaUjuCgDhmONrTDLhssBe58EalfAseGkd3E 4wwQoVU6JWMqQ== Received: from wylie.me.uk (localhost [IPv6:::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by frodo.localnet (Postfix) with ESMTPS id 470F5440058; Tue, 10 Jul 2018 20:28:04 +0100 (BST) From: alan@wylie.me.uk (Alan J. Wylie) To: Mark Rutland Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, catalin.marinas@arm.com, christoffer.dall@arm.com, kvmarm@lists.cs.columbia.edu, marc.zyngier@arm.com, will.deacon@arm.com Subject: Re: [PATCH 0/2] arm64: spectre-v1 write fixes (CVE-2018-3693) References: <20180710180123.56461-1-mark.rutland@arm.com> Date: Tue, 10 Jul 2018 20:28:04 +0100 In-Reply-To: <20180710180123.56461-1-mark.rutland@arm.com> (Mark Rutland's message of "Tue, 10 Jul 2018 19:01:21 +0100") Message-ID: <87d0vuao1n.fsf@wylie.me.uk> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Mark Rutland writes: > These patches inhibit spectre-v1-write gadgets found in arch/arm64, using the > same mitigation applied to existing spectre-v1-read gadgets. > > This issue is also known as CVE-2018-3693, or "bounds check bypass store". > More details can be found in the Arm Cache Speculation Side-channels > whitepaper, available from the Arm security updates site [1]. > [1] https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability >From that web page: | Variant 1: bounds check bypass store (CVE-2017-5753) and bounds check | bypass store (CVE-2018-3693) Isn't -5753 a "read" vulnerability, not "store"? -- Alan J. Wylie https://www.wylie.me.uk/ Dance like no-one's watching. / Encrypt like everyone is. Security is inversely proportional to convenience