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=-1.0 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,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 556E7C43381 for ; Mon, 25 Feb 2019 16:50:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 213F020842 for ; Mon, 25 Feb 2019 16:50:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=amacapital-net.20150623.gappssmtp.com header.i=@amacapital-net.20150623.gappssmtp.com header.b="o6jd6nr8" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728404AbfBYQuv (ORCPT ); Mon, 25 Feb 2019 11:50:51 -0500 Received: from mail-wm1-f66.google.com ([209.85.128.66]:40253 "EHLO mail-wm1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728138AbfBYQuu (ORCPT ); Mon, 25 Feb 2019 11:50:50 -0500 Received: by mail-wm1-f66.google.com with SMTP id t15so8689924wmi.5 for ; Mon, 25 Feb 2019 08:50:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amacapital-net.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=q+JkhsJslx/OcBGe23YpbBrHau4TqFDx3J+Ur+SsHOg=; b=o6jd6nr8mSE0M9pgTquLQqebfHexjUMOHEeIEY7i/6Mz8/im2C3gBcRKoA5ni0XePU RzVR5paTUt+kWCIIZ2PmyAOc3/5aS6eQ0eNwJN7hYVXA9GfhYjLxvtcPeTGhCgpHEZHN E/CC6ycIOHFB6niq9Ecirgkyr7NGJykrvTrGQhYkonj8MwzAnztq9PF1C1Pek30+ZtVr jHo1ilvInU6+GwxopIFRE3vuy8Z0HMtmLfeayMCYthDQ0tv17Lqyt9kHF0i9xJlNUtck XckgWLnj7sPNzG0xOspbBktp8JNP1sI/MqsYja79Nf9UPzfvOprzmjA9SzS792pfaL4H yGww== 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=q+JkhsJslx/OcBGe23YpbBrHau4TqFDx3J+Ur+SsHOg=; b=sjCwj0A/4ifPAernOa6zoTkLTwhMxMPnVG3bv8QjrBHO0Kxfto9w99k/PZKLE1G3Oq gJDfu1zJOJB7c42knQhCASkw5Zvul78D9XAfbUJL+vbd4NV00RuP6EOHN5+OFdrjNGEB lshAZg6/NcW+qQSAjla1/qtBEMBDlILtukWo8Ylt/PVANlpkKzev8Q6BAaIdLJjOSnYD yjScp1ms1AgxZCeHOCibtqKBaEMg/ErU9dbZwE942JKrx4v2p3vvbiCXq5ly8erfBtJu fWN27nWpZnNFEW5qS6fjxjbdIDgEGCMAAGmg34RvVA4+3aLFL8RqJvVUifnq4JDvOcBY fF7w== X-Gm-Message-State: AHQUAubWSuV+pK3lp48il3HOYNu6kWeq3f313dSQFv1/K3NgVdZyY3fH yt3ne2OtUqW3swmjmAQfmnXroIFrUMWJ7Ms8VyLfXg== X-Google-Smtp-Source: AHgI3IaEUY5CeLYsf3uAGo2FZ2o0BKkGhTe7oUvonzXK9mKOLjgrwfU/93nGNK01iilB9FVIBByO9Citsa2RWSwXCGo= X-Received: by 2002:a7b:c84b:: with SMTP id c11mr11017446wml.108.1551113449345; Mon, 25 Feb 2019 08:50:49 -0800 (PST) MIME-Version: 1.0 References: <20190225124330.613028745@infradead.org> <20190225125231.845656645@infradead.org> <20190225163651.GG26145@zn.tnic> In-Reply-To: <20190225163651.GG26145@zn.tnic> From: Andy Lutomirski Date: Mon, 25 Feb 2019 08:50:37 -0800 Message-ID: Subject: Re: [PATCH 1/6] x86/uaccess: Dont evaluate argument inside AC region To: Borislav Petkov Cc: Peter Zijlstra , Linus Torvalds , Thomas Gleixner , "H. Peter Anvin" , Julien Thierry , Will Deacon , Ingo Molnar , Catalin Marinas , James Morse , valentin.schneider@arm.com, Brian Gerst , Josh Poimboeuf , Andrew Lutomirski , Denys Vlasenko , 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 Mon, Feb 25, 2019 at 8:37 AM Borislav Petkov wrote: > > On Mon, Feb 25, 2019 at 07:43:53AM -0800, Andy Lutomirski wrote: > > I put a slightly fancier version here last night so that the 0day bot > > could chew on it: > > I'm guessing 0day bot didn't complain so far? Or should we give it one > more day? > No complaints yet. I'll holler if it complains. This one patch could plausibly be -stable or 5.0 material, I suppose.