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=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,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 06BB1C0650E for ; Mon, 8 Jul 2019 01:22:34 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (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 B8C6020693 for ; Mon, 8 Jul 2019 01:22:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B8C6020693 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 45hnkG1ttzzDqNS for ; Mon, 8 Jul 2019 11:22:30 +1000 (AEST) Received: from ozlabs.org (bilbo.ozlabs.org [203.11.71.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 45hnfn5DPkzDqPk for ; Mon, 8 Jul 2019 11:19:29 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Received: by ozlabs.org (Postfix, from userid 1034) id 45hnfn46Fkz9sNF; Mon, 8 Jul 2019 11:19:29 +1000 (AEST) X-powerpc-patch-notification: thanks X-powerpc-patch-commit: 6fbcdd59094ade30db63f32316e9502425d7b256 In-Reply-To: <20190306011038.16449-1-sjitindarsingh@gmail.com> To: Suraj Jitindar Singh , linuxppc-dev@lists.ozlabs.org From: Michael Ellerman Subject: Re: [PATCH] powerpc: Add barrier_nospec to raw_copy_in_user() Message-Id: <45hnfn46Fkz9sNF@ozlabs.org> Date: Mon, 8 Jul 2019 11:19:29 +1000 (AEST) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Suraj Jitindar Singh Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Wed, 2019-03-06 at 01:10:38 UTC, Suraj Jitindar Singh wrote: > Commit ddf35cf3764b ("powerpc: Use barrier_nospec in copy_from_user()") > Added barrier_nospec before loading from user-controller pointers. > The intention was to order the load from the potentially user-controlled > pointer vs a previous branch based on an access_ok() check or similar. > > In order to achieve the same result, add a barrier_nospec to the > raw_copy_in_user() function before loading from such a user-controlled > pointer. > > Signed-off-by: Suraj Jitindar Singh Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/6fbcdd59094ade30db63f32316e9502425d7b256 cheers