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[2620:137:e000::1:20]) by mx.google.com with ESMTP id w13-20020a1709029a8d00b001932e3a7fb7si12961071plp.338.2023.01.12.20.13.34; Thu, 12 Jan 2023 20:13:42 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20210112 header.b="I/wdvXlx"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230161AbjAMEHu (ORCPT + 50 others); Thu, 12 Jan 2023 23:07:50 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35886 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231169AbjAMEHb (ORCPT ); Thu, 12 Jan 2023 23:07:31 -0500 Received: from mail-pl1-x633.google.com (mail-pl1-x633.google.com [IPv6:2607:f8b0:4864:20::633]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B5AAC63D27 for ; Thu, 12 Jan 2023 20:07:30 -0800 (PST) Received: by mail-pl1-x633.google.com with SMTP id v23so17336436plo.1 for ; Thu, 12 Jan 2023 20:07:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=user-agent:in-reply-to:content-disposition:mime-version:references :message-id:subject:to:from:date:from:to:cc:subject:date:message-id :reply-to; bh=DYI5pjk8+oki3WxDxm15UVmcJ7O/apoFc5w+Rdk9kRM=; b=I/wdvXlxrKnCFaV7HqW1wESORYWZzMW73q3/XsX/J+NCac8+1X6R0kIdbjovHyQ8KD AOsJoUnWeNGW8eyhEUB8f1zZDtqpeNqTJ7xYbbo32wj5tICJmmHTCR+Mw6khXbTM5ymj xrX6p3HvCq1lHVMk9YA4b9Iq2pKgIi5a2Y07b8O6yRkIbKrJ0LWghXXs98riB4hWhBpr mWYkuCZwLrWwSYXF/2HXDWepbF8k0no+quJuhO7i1m0hd188DSZbcK4a8wNMK/+pcka5 oJiHkHB+96Gqzsp1BvbcTJ+3eXqSWDSf7RmDIiAPx1ejRZpFRz6JjcQOHqjH4XZAvYDV oabQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=user-agent:in-reply-to:content-disposition:mime-version:references :message-id:subject:to:from:date:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=DYI5pjk8+oki3WxDxm15UVmcJ7O/apoFc5w+Rdk9kRM=; b=K5+xlSVbcuK/B9zfSmJZ7KidZpGAtLGpY7QoQVj4r9MHEN1u52CtSJ6js5Yw1ZXBCs rYwjJ4zfgDbN7ktOik9dMMvjQ77MQVN0Gc0IR7t8FHL++Byx/tMv3/pKCtspRbmxCbSI XfRMpzjz/YC5ynIZIS8vIwRYGda6Qw2cj9UyJoME6nB8Db/GLzqo7H7xe2Qm+6PWJU8n 7JOnuppKffuDq82ImS5PKsZvVrGEvpCEjJJkynvmnBcuYdIj2kDUIcz5qZa9XY+X7EV7 HR5CQu5+5SqpXJ6CyAbGq71q2T5ZsqPW0DnM5Fv3Uv/1u04ga2fgU/UgMiUaS0uyami1 0bIA== X-Gm-Message-State: AFqh2kp0+oBbV4s+pcNv+63E2oM50D7o+IHXWFh7b/GJcrUILJnekmNb g+HxAVpAivUT7aO1Q1XsEy4I2OQisCs= X-Received: by 2002:a17:902:c205:b0:194:6e8d:89ac with SMTP id 5-20020a170902c20500b001946e8d89acmr1263076pll.24.1673582849855; Thu, 12 Jan 2023 20:07:29 -0800 (PST) Received: from thinkstation.cmpxchg8b.net ([76.133.164.192]) by smtp.gmail.com with ESMTPSA id q8-20020a170902a3c800b0017f74cab9eesm8322993plb.128.2023.01.12.20.07.29 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 12 Jan 2023 20:07:29 -0800 (PST) Date: Thu, 12 Jan 2023 20:07:28 -0800 From: Tavis Ormandy To: linux-kernel@vger.kernel.org Subject: Re: x86: XSAVE flags mystery Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/2.2.7 (2022-08-07) X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jan 12, 2023 at 09:30:37AM -0800, Tavis Ormandy wrote: > Hello, I have a mystery and wonder if it might be a kernel bug. > It seems like other people have noticed the same issue: https://robert.ocallahan.org/2017/06/another-case-of-obscure-cpu.html I guess it is just an unexplained CPU quirk, not a kernel bug. Weird. Thanks, Tavis. -- _o) $ lynx lock.cmpxchg8b.com /\\ _o) _o) $ finger taviso@sdf.org _\_V _( ) _( ) @taviso