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=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 4998EC3A589 for ; Thu, 15 Aug 2019 15:14:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 12F632084D for ; Thu, 15 Aug 2019 15:14:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732522AbfHOPOL (ORCPT ); Thu, 15 Aug 2019 11:14:11 -0400 Received: from outgoing-auth-1.mit.edu ([18.9.28.11]:52439 "EHLO outgoing.mit.edu" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1732517AbfHOPOL (ORCPT ); Thu, 15 Aug 2019 11:14:11 -0400 Received: from callcc.thunk.org (guestnat-104-133-8-96.corp.google.com [104.133.8.96] (may be forged)) (authenticated bits=0) (User authenticated as tytso@ATHENA.MIT.EDU) by outgoing.mit.edu (8.14.7/8.12.4) with ESMTP id x7FFCP4x018561 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 15 Aug 2019 11:12:27 -0400 Received: by callcc.thunk.org (Postfix, from userid 15806) id BF39B4218EF; Thu, 15 Aug 2019 11:12:24 -0400 (EDT) Date: Thu, 15 Aug 2019 11:12:24 -0400 From: "Theodore Y. Ts'o" To: Pavel Machek Cc: "Lendacky, Thomas" , nhorman@tuxdriver.com, "linux-kernel@vger.kernel.org" , "linux-doc@vger.kernel.org" , "linux-pm@vger.kernel.org" , "x86@kernel.org" , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "Rafael J . Wysocki" , Chen Yu , Jonathan Corbet Subject: Re: Non-random RDRAND Re: [PATCH] x86/CPU/AMD: Clear RDRAND CPUID bit on AMD family 15h/16h Message-ID: <20190815151224.GB18727@mit.edu> Mail-Followup-To: "Theodore Y. Ts'o" , Pavel Machek , "Lendacky, Thomas" , nhorman@tuxdriver.com, "linux-kernel@vger.kernel.org" , "linux-doc@vger.kernel.org" , "linux-pm@vger.kernel.org" , "x86@kernel.org" , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "Rafael J . Wysocki" , Chen Yu , Jonathan Corbet References: <776cb5c2d33e7fd0d2893904724c0e52b394f24a.1565817448.git.thomas.lendacky@amd.com> <20190814232434.GA31769@amd> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190814232434.GA31769@amd> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org On Thu, Aug 15, 2019 at 01:24:35AM +0200, Pavel Machek wrote: > Burn it with fire! > > I mean... people were afraid RDRAND would be backdoored, and you now > confirm ... it indeed _is_ backdoored? /., here's news for you! To be fair to AMD, I wouldn't call it a backdoor. Hanlon's razor is applicable here: "Never attribute to malice that which can be adequately explained by neglect." (Sometimes other words are used instead of neglect, but i'm trying to be nice.) - Ted P.S. Also applicable: https://www.youtube.com/watch?v=XZxzJGgox_E