Received: by 10.223.176.46 with SMTP id f43csp532543wra; Wed, 24 Jan 2018 01:58:59 -0800 (PST) X-Google-Smtp-Source: AH8x225mINIzhsge89jg9obIiWWIM0mpeyPZdna+F+pBsNDtV8dMTnpDyl9HeviJNRtn9rQzsYJ9 X-Received: by 10.101.82.68 with SMTP id q4mr10212385pgp.369.1516787939120; Wed, 24 Jan 2018 01:58:59 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1516787939; cv=none; d=google.com; s=arc-20160816; b=VH13VAU0qOIx4lrmECydEeypwfElzUDPD99ttBBWIbvQiuVEvfQHEWlEQsWQyGrtFT FnHK90GZcspEs7nuoCrg6WiKABRlq0fS/U304PbQwv259smd20dWAB1hcLogOH58kd6u QZy/FPDwmPcMcGJwl9orbTWpfpHg9kxDcve56MB5KDvxBVk6k79nLq9wBF2L107kJ0XI 3HZfOBIzLe5N5JUIr4VfEyqtQwtRTkxo0oF0tK0Xj+eVlouD6tIrCRrLvv4fd8drix+9 vt5edTlrc1Zefm10C+J0VP98q8GpJd6hxpDqGgutO+6rqXivYzDs9306cQJx2YcchDFu 9sXg== 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:arc-authentication-results; bh=8x0yAWgmzZwZya8OyB/yubx3oMQAtGBacUBJPGjf4ZE=; b=DM76litBCb8wsBfnDOZ+hA/eHwSj9QzLtlcTY/E8D08q3YMvzFIyccEugPh8vIWTiE 5e7uzR3WmeaBUIrQ3FXrmQE5fO4doh+wTD1WxDUPHqABddorJLBHl7aryUtU6Oo7wSZv Z8dx2HDsEY/U8Sn026rkFSB57euoMzLpUaJi4i/E3PDMlzOBkQ7R9A+UfL+VfR6pNWJ8 MfH6y1B4l3idY54hp1k0pXoSzOhH3VUFusvx/cj2PGbhPwFHy1DT1NKKhS0poxqCCWxp IvU6t/tOxqnCSpl8LIUJrm1WwABApYg0hU145lDh8cw8icnHlxWkbIAMON2GsCMlR4nr llQg== ARC-Authentication-Results: i=1; mx.google.com; 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 Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id h3-v6si4608280plb.527.2018.01.24.01.58.45; Wed, 24 Jan 2018 01:58:59 -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; 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 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932939AbeAXJ6M (ORCPT + 99 others); Wed, 24 Jan 2018 04:58:12 -0500 Received: from mail.skyhub.de ([5.9.137.197]:42806 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932111AbeAXJ6K (ORCPT ); Wed, 24 Jan 2018 04:58:10 -0500 X-Virus-Scanned: Nedap ESD1 at mail.skyhub.de Received: from mail.skyhub.de ([127.0.0.1]) by localhost (blast.alien8.de [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id JCICRutHhW0M; Wed, 24 Jan 2018 10:58:09 +0100 (CET) Received: from pd.tnic (p200300EC2BD0B300B5F6B1F16569F43D.dip0.t-ipconnect.de [IPv6:2003:ec:2bd0:b300:b5f6:b1f1:6569:f43d]) (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 2554A1EC0328; Wed, 24 Jan 2018 10:58:09 +0100 (CET) Date: Wed, 24 Jan 2018 10:58:03 +0100 From: Borislav Petkov To: Kees Cook Cc: Jiri Kosina , David Woodhouse , Andi Kleen , Paul Turner , LKML , Linus Torvalds , Greg Kroah-Hartman , Tim Chen , Dave Hansen , Thomas Gleixner , Rik van Riel , Peter Zijlstra , Andy Lutomirski , Alan Cox , X86 ML , Tom Lendacky , Josh Poimboeuf Subject: Re: [PATCH v8 04/12] x86/spectre: Add boot time option to select Spectre v2 mitigation Message-ID: <20180124095803.fcnq3g4b5xtebdtr@pd.tnic> References: <1515707194-20531-1-git-send-email-dwmw@amazon.co.uk> <1515707194-20531-5-git-send-email-dwmw@amazon.co.uk> <20180123224014.dsbzps4hydt6h7ed@pd.tnic> <20180123230545.jufkdgttxe4eiswf@pd.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20170609 (1.8.3) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jan 24, 2018 at 11:32:00AM +1100, Kees Cook wrote: > I've wanted this for a while (especially for the coming detected > support for stack protector). Having more than just the clfags is, I > think, important. We'd likely want to record the entire environment > (compiler version, linker version, flags on both, etc). ... which makes me think of /proc/config.gz Can we do something like that here too? -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.