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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 BE1ABC433E1 for ; Tue, 9 Jun 2020 01:06:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 910732076C for ; Tue, 9 Jun 2020 01:06:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591664766; bh=xww3ha3RV/sRMp/8nxc5RDnUU7jjFcQdrVOpE9QJWXg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Qzs7Ifq26mzeNW2K60BtGG0kNwjXLXI6+bpF9au28f2eHdQyv9isAIIGCfGQxctzd Z4uUqe5mlgUVWMIHOSS+ctKj/6KNhyoGvZxnZGvgtPD2/WYN22/N09ryQ3MZKfKj0C 6Fofv05GVJN8Y8RqqMY42sH2DgZ9WbvSVC2jSYsk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727824AbgFHXHN (ORCPT ); Mon, 8 Jun 2020 19:07:13 -0400 Received: from mail.kernel.org ([198.145.29.99]:50864 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727809AbgFHXHI (ORCPT ); Mon, 8 Jun 2020 19:07:08 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E230E20820; Mon, 8 Jun 2020 23:07:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591657627; bh=xww3ha3RV/sRMp/8nxc5RDnUU7jjFcQdrVOpE9QJWXg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EvyKP7PP36r1tHKLVdgkpW/otyMeNLX0oplZZ6vPn4TqeM11xoB7AgVjJr2RuSKET P7eanSnH6ZyD/cP2tVWJ2TzcdoKnV0H+ucJ5Atqxczoh+qMnKZ4WxQEZeCUpXgB22t pHrvBQMPqyMemO7lGtD67gT0W1diaiS77g8Opft4= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Jeremy Cline , "Frank Ch . Eigler" , James Morris , Sasha Levin , linux-security-module@vger.kernel.org Subject: [PATCH AUTOSEL 5.7 047/274] lockdown: Allow unprivileged users to see lockdown status Date: Mon, 8 Jun 2020 19:02:20 -0400 Message-Id: <20200608230607.3361041-47-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200608230607.3361041-1-sashal@kernel.org> References: <20200608230607.3361041-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jeremy Cline [ Upstream commit 60cf7c5ed5f7087c4de87a7676b8c82d96fd166c ] A number of userspace tools, such as systemtap, need a way to see the current lockdown state so they can gracefully deal with the kernel being locked down. The state is already exposed in /sys/kernel/security/lockdown, but is only readable by root. Adjust the permissions so unprivileged users can read the state. Fixes: 000d388ed3bb ("security: Add a static lockdown policy LSM") Cc: Frank Ch. Eigler Signed-off-by: Jeremy Cline Signed-off-by: James Morris Signed-off-by: Sasha Levin --- security/lockdown/lockdown.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/security/lockdown/lockdown.c b/security/lockdown/lockdown.c index 5a952617a0eb..87cbdc64d272 100644 --- a/security/lockdown/lockdown.c +++ b/security/lockdown/lockdown.c @@ -150,7 +150,7 @@ static int __init lockdown_secfs_init(void) { struct dentry *dentry; - dentry = securityfs_create_file("lockdown", 0600, NULL, NULL, + dentry = securityfs_create_file("lockdown", 0644, NULL, NULL, &lockdown_ops); return PTR_ERR_OR_ZERO(dentry); } -- 2.25.1