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=-3.9 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 165D5C07E85 for ; Sun, 9 Dec 2018 21:55:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D9FE420855 for ; Sun, 9 Dec 2018 21:55:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D9FE420855 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=decadent.org.uk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726629AbeLIVz3 (ORCPT ); Sun, 9 Dec 2018 16:55:29 -0500 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:34794 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726413AbeLIVzO (ORCPT ); Sun, 9 Dec 2018 16:55:14 -0500 Received: from pub.yeoldevic.com ([81.174.156.145] helo=deadeye) by shadbolt.decadent.org.uk with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1gW72Y-0002if-Pm; Sun, 09 Dec 2018 21:55:06 +0000 Received: from ben by deadeye with local (Exim 4.91) (envelope-from ) id 1gW72X-0003CU-Sj; Sun, 09 Dec 2018 21:55:05 +0000 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, "Linus Torvalds" , "Will Deacon" , schwidefsky@de.ibm.com, linux-arch@vger.kernel.org, "Jon Medhurst" , "Thomas Richter" , "Thomas Gleixner" , "Masami Hiramatsu" , "Anil S Keshavamurthy" , rostedt@goodmis.org, "Arnd Bergmann" , "Heiko Carstens" , brueckner@linux.vnet.ibm.com, "David Howells" , "Peter Zijlstra" , "Tobin C . Harding" , "Ananth N Mavinakayanahalli" , "David S . Miller" , acme@kernel.org, "Ingo Molnar" Date: Sun, 09 Dec 2018 21:50:33 +0000 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) X-Patchwork-Hint: ignore Subject: [PATCH 3.16 005/328] kprobes: Make list and blacklist root user read only In-Reply-To: X-SA-Exim-Connect-IP: 81.174.156.145 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.16.62-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Masami Hiramatsu commit f2a3ab36077222437b4826fc76111caa14562b7c upstream. Since the blacklist and list files on debugfs indicates a sensitive address information to reader, it should be restricted to the root user. Suggested-by: Thomas Richter Suggested-by: Ingo Molnar Signed-off-by: Masami Hiramatsu Cc: Ananth N Mavinakayanahalli Cc: Anil S Keshavamurthy Cc: Arnd Bergmann Cc: David Howells Cc: David S . Miller Cc: Heiko Carstens Cc: Jon Medhurst Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Tobin C . Harding Cc: Will Deacon Cc: acme@kernel.org Cc: akpm@linux-foundation.org Cc: brueckner@linux.vnet.ibm.com Cc: linux-arch@vger.kernel.org Cc: rostedt@goodmis.org Cc: schwidefsky@de.ibm.com Link: https://lkml.kernel.org/lkml/152491890171.9916.5183693615601334087.stgit@devbox Signed-off-by: Ingo Molnar Signed-off-by: Ben Hutchings --- kernel/kprobes.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/kernel/kprobes.c +++ b/kernel/kprobes.c @@ -2414,7 +2414,7 @@ static int __init debugfs_kprobe_init(vo if (!dir) return -ENOMEM; - file = debugfs_create_file("list", 0444, dir, NULL, + file = debugfs_create_file("list", 0400, dir, NULL, &debugfs_kprobes_operations); if (!file) goto error; @@ -2424,7 +2424,7 @@ static int __init debugfs_kprobe_init(vo if (!file) goto error; - file = debugfs_create_file("blacklist", 0444, dir, NULL, + file = debugfs_create_file("blacklist", 0400, dir, NULL, &debugfs_kprobe_blacklist_ops); if (!file) goto error;