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=-5.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_2 autolearn=unavailable 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 877DFC433FF for ; Wed, 31 Jul 2019 01:48:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 68B912067D for ; Wed, 31 Jul 2019 01:48:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726670AbfGaBsJ (ORCPT ); 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: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: 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