Received: by 2002:a25:ad19:0:0:0:0:0 with SMTP id y25csp5514359ybi; Tue, 30 Jul 2019 22:32:16 -0700 (PDT) X-Google-Smtp-Source: APXvYqzc30zqjA+j+87InlGsT2xo8BngpzEI3dzWR+Y7+/u60kcCe4KtAtXOm5Mi/KKWxCfK0Op4 X-Received: by 2002:a63:ec03:: with SMTP id j3mr10283304pgh.325.1564551135978; Tue, 30 Jul 2019 22:32:15 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1564551135; cv=none; d=google.com; s=arc-20160816; b=VC3XDsW0fOKnvp78f820gTPef0s6epOwXQoxm7ojEELMkfjASB0FKDFVFiZ2g99OZf 1+JtQidAcKPkEeZa4lM6AZQbC8Mh6TOqYsKHYJqNPs5KU8GjVC7+Cr5txuGMjVUaJ2OO 47XTqHcSYRX24709g9cVgKoTW7/6M+D+yUCYeY1eDcbp3VCoU4KIf4pn1FFka6erI2jr s6bDr0HcaSaEjEdajatynLAicXaPQPIhjP5C3vf1axPwEzaXcLZSwKXOqtpZlbopQjNf 8W5FetHowGr+jYditoL2WJb1r3z4e+3JxxKw7JMjtew22V0BTUxhjntUTxiOuxzk+aK2 5hRw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:subject:cc:to:from:date; bh=skctZ01K+Pmkud49QwdRKNmICrkj7Exs3ZBMucjmKf4=; b=xYM92we3w77k+g/0boOY0LsMgdMy6EJut5jiRd+ffz+H1+LsThLyilabHxg5+vc0dm A+Rver+t6/mp+zTKj+zEdKjcXwKLFlQmCBmb5QGb+UU3eZ8bZtFOF5mZerPSw7RH2zqP 0NYE6C2jC36trtbMDRUN3Kqf5sUWQ1MdmkGfmZkCDgTnECP8fC2D/Sug1cpQDbCYNkbb HuISk3BdRERTZJtLv4GclvM69wjcZV/Hxg90ungDzs2P1G2Ky/O25wgBAjH4UP81JtbX wPtbTUlJ4MMntE1gGOOk4tgTYkAVTOiu3BNNJqxLX6QHWn4iNvUcf8n6ToLrvo4+OrpQ ccgw== 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 w10si28923847plz.48.2019.07.30.22.32.00; Tue, 30 Jul 2019 22:32:15 -0700 (PDT) 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 S1727090AbfGaBsJ (ORCPT + 99 others); Tue, 30 Jul 2019 21:48:09 -0400 Received: from mail.kernel.org ([198.145.29.99]:55646 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725209AbfGaBsI (ORCPT ); Tue, 30 Jul 2019 21:48:08 -0400 Received: from oasis.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5A9C02067D; Wed, 31 Jul 2019 01:48:07 +0000 (UTC) Date: Tue, 30 Jul 2019 21:48:03 -0400 From: Steven Rostedt To: Matthew Garrett Cc: jmorris@namei.org, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, linux-api@vger.kernel.org, Matthew Garrett Subject: Re: [PATCH] tracefs: Restrict tracefs when the kernel is locked down Message-ID: <20190730214803.6d06da65@oasis.local.home> In-Reply-To: <20190730184734.202386-1-matthewgarrett@google.com> References: <20190724222354.7cbd6c6e@oasis.local.home> <20190730184734.202386-1-matthewgarrett@google.com> X-Mailer: Claws Mail 3.17.3 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 30 Jul 2019 11:47:34 -0700 Matthew Garrett wrote: > Tracefs may release more information about the kernel than desirable, so > restrict it when the kernel is locked down in confidentiality mode by > preventing open(). > > Signed-off-by: Matthew Garrett > Cc: Steven Rostedt Reviewed-by: Steven Rostedt (VMware) -- Steve