Received: by 2002:a25:7ec1:0:0:0:0:0 with SMTP id z184csp4758261ybc; Tue, 26 Nov 2019 14:15:29 -0800 (PST) X-Google-Smtp-Source: APXvYqxhsDHy2hsWQ8ChB/29pLOyvCRmczX151pZCPTs29nXgpX5NYAoVFkM0oeG83gOBdO4zR4v X-Received: by 2002:a17:906:f91:: with SMTP id q17mr46043353ejj.302.1574806529154; Tue, 26 Nov 2019 14:15:29 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1574806529; cv=none; d=google.com; s=arc-20160816; b=FX1qDG/H/cvujHbG4lnD7SlsGE/cAXoRZMkssm0i9Y3jrQNQHOrfRacjY4e0K+/HyG Iv9+DXg6ahymr/JBts+4EBqfHIzwiml3bvmSFeI3PTSmI8fmDRQNxwpM9ywGndoJErnk fhrizgbuRsPdRrRuTbnO/FmLTJm1u2oERIMIrNWtz6ALR3MdTaScqNzEhnVxLFqfVW5O 2QYs6Wjshj/y+tDgfCCox0pIJ7AKL+XmQr/cjsdNsz3mSev2L99y+jSb5l4kmp88FnMM whaSUhd+bVTBgNcdO+S8gYt0nicN8QlC2aDDuq29Gi1n5Esi2FHrsVm2YqHHa+8qds/R R4zQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:dkim-signature; bh=bzV66XmqrkIBUMFTYjntXwun1FRqc6sMmxnkD45b3zs=; b=bhggKvCpRjRQ7GhpJ+fbGW0IEp6Zur3co3w6UML3CjXzbJXUTb4PTOX/DxKMUNMtP6 CKHrxsZmjVWYbAsYporocpwMRA2CF/BBdLSLE2arU0cWzUbubuI6X1BwdIxAWQKyzXC7 1aZ02SpNCZ8PJMFMKgZxxQTt3LH6EkrwpwPWtyrvLAMKBJ+Np7b12AGYoqImr+38kRcK oHs8/4RLVv/Wddy3Hg3ksEJCW8iWY/OuXBvH2a+HVk+E1w8soKOIKGERszglfxdWdYWY +n5xfR8krLyWcvrsbWNPl9qZHaV6SKl94+Es0rJSJo7lSKwA9n3yZWQtJavzC8REsxN6 sqrA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@alien8.de header.s=dkim header.b=cBD3raBL; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=alien8.de Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id ba10si1247946edb.168.2019.11.26.14.15.04; Tue, 26 Nov 2019 14:15:29 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@alien8.de header.s=dkim header.b=cBD3raBL; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=alien8.de Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726231AbfKZWOC (ORCPT + 99 others); Tue, 26 Nov 2019 17:14:02 -0500 Received: from mail.skyhub.de ([5.9.137.197]:56598 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726072AbfKZWOB (ORCPT ); Tue, 26 Nov 2019 17:14:01 -0500 Received: from zn.tnic (p200300EC2F0EC2003034EE13CF148829.dip0.t-ipconnect.de [IPv6:2003:ec:2f0e:c200:3034:ee13:cf14:8829]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 7FBD11EC0CDC; Tue, 26 Nov 2019 23:14:00 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1574806440; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=bzV66XmqrkIBUMFTYjntXwun1FRqc6sMmxnkD45b3zs=; b=cBD3raBLhPtrbCdVKinqa08lUKDBbYtX+hMdoU3brhQpI/MGLfrKXuqJmNio082Ha7VkXp RmYPfZntZCdifHRawggyG/9Zz+BDH3tcgvRjo1Jsxv7kC+y/RU8D1RV7WY/ZQ8qpOeoh10 emBRZM5CZ05sx4FmFmKwcSJEKP3TPu4= Date: Tue, 26 Nov 2019 23:13:53 +0100 From: Borislav Petkov To: Barret Rhoden , austin@google.com Cc: Sebastian Andrzej Siewior , Rik van Riel , x86@kernel.org, linux-kernel@vger.kernel.org, Thomas Gleixner , Ingo Molnar Subject: Re: AVX register corruption from signal delivery Message-ID: <20191126221328.GH31379@zn.tnic> References: <20191126202026.csrmjre6vn2nxq7c@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Nov 26, 2019 at 04:23:40PM -0500, Barret Rhoden wrote: > Thanks; config attached. I've been able to recreate it in QEMU with at > least 2 cores. Yap, I can too, in my VM. Btw, would you guys like to submit that reproducer test program https://bugzilla.kernel.org/attachment.cgi?id=286073 into the kernel selftests pile here: tools/testing/selftests/x86/ ? It needs proper cleanup to fit kernel coding style but it could be a good start for collecting interesting FPU test cases... Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette