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=-7.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=no 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 4C6F6C433E0 for ; Wed, 15 Jul 2020 08:42:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 322B5206E9 for ; Wed, 15 Jul 2020 08:42:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730342AbgGOImY (ORCPT ); Wed, 15 Jul 2020 04:42:24 -0400 Received: from seldsegrel01.sonyericsson.com ([37.139.156.29]:5406 "EHLO SELDSEGREL01.sonyericsson.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729227AbgGOImX (ORCPT ); Wed, 15 Jul 2020 04:42:23 -0400 From: Peter Enderborg To: Greg Kroah-Hartman , , "Rafael J . Wysocki" , Andrew Morton , Jonathan Corbet , , Randy Dunlap , Steven Rostedt , Ingo Molnar Subject: [PATCH v5 0/2] debugfs: Add access restriction option Date: Wed, 15 Jul 2020 10:42:05 +0200 Message-ID: <20200715084207.7639-1-peter.enderborg@sony.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200617133738.6631-1-peter.enderborg@sony.com> References: <20200617133738.6631-1-peter.enderborg@sony.com> MIME-Version: 1.0 Content-Type: text/plain X-SEG-SpamProfiler-Analysis: v=2.3 cv=CszBjUwD c=1 sm=1 tr=0 a=Jtaq2Av1iV2Yg7i8w6AGMw==:117 a=_RQrkK6FrEwA:10 a=QyXUC8HyAAAA:8 a=rwTvC7ucDngX97v92ZIA:9 X-SEG-SpamProfiler-Score: 0 Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org Since debugfs include sensitive information it need to be treated carefully. But it also has many very useful debug functions for userspace. With this option we can have same configuration for system with need of debugfs and a way to turn it off. This gives a extra protection for exposure on systems where user-space services with system access are attacked. v2. Removed MOUNT as part of restrictions. Added API's restrictions as separate restriction. v3 Updated Documentation after Randy Dunlap reviews and suggestions. v4 Removed #ifdefs from inode.c and using internal.h for configuration and now using BIT() for that. Function is now always on, and are instead selected by a built in default or command line parameter. Changed return value on debug_mount Reported-by: kernel test robot Im not sure about that it is right v5 Added notes to config help suggested by GregKH. Removed _BIT from names, white-space and tab. (checkpatch did not complain).