From patchwork Fri Nov 13 00:01:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Daniel Brooks X-Patchwork-Id: 25105 Return-Path: X-Original-To: patchwork@mira.cbaines.net Delivered-To: patchwork@mira.cbaines.net Received: by mira.cbaines.net (Postfix, from userid 113) id B28C527BBF6; Fri, 13 Nov 2020 00:03:10 +0000 (GMT) X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on mira.cbaines.net X-Spam-Level: X-Spam-Status: No, score=-2.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, MAILING_LIST_MULTI,RCVD_IN_MSPIKE_H4,RCVD_IN_MSPIKE_WL,SPF_HELO_PASS, T_DKIM_INVALID,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.2 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mira.cbaines.net (Postfix) with ESMTPS id 7D00F27BBF4 for ; Fri, 13 Nov 2020 00:03:09 +0000 (GMT) Received: from localhost ([::1]:52730 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kdMYW-0002iH-N4 for patchwork@mira.cbaines.net; Thu, 12 Nov 2020 19:03:08 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:33310) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kdMYQ-0002he-8n for guix-patches@gnu.org; Thu, 12 Nov 2020 19:03:02 -0500 Received: from debbugs.gnu.org ([209.51.188.43]:34532) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kdMYP-0003Lm-V7 for guix-patches@gnu.org; Thu, 12 Nov 2020 19:03:01 -0500 Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1kdMYP-0003vC-PC for guix-patches@gnu.org; Thu, 12 Nov 2020 19:03:01 -0500 X-Loop: help-debbugs@gnu.org Subject: [bug#44549] [PATCH v2] etc: updates for the guix-daemon SELinux policy References: <87sg9h8s5j.fsf@db48x.net> In-Reply-To: <87sg9h8s5j.fsf@db48x.net> Resent-From: Daniel Brooks Original-Sender: "Debbugs-submit" Resent-CC: guix-patches@gnu.org Resent-Date: Fri, 13 Nov 2020 00:03:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 44549 X-GNU-PR-Package: guix-patches X-GNU-PR-Keywords: patch To: 44549@debbugs.gnu.org Received: via spool by 44549-submit@debbugs.gnu.org id=B44549.160522572415000 (code B ref 44549); Fri, 13 Nov 2020 00:03:01 +0000 Received: (at 44549) by debbugs.gnu.org; 13 Nov 2020 00:02:04 +0000 Received: from localhost ([127.0.0.1]:46078 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1kdMXT-0003ts-CO for submit@debbugs.gnu.org; Thu, 12 Nov 2020 19:02:03 -0500 Received: from smtp-out-4.mxes.net ([198.205.123.69]:20975) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1kdMXR-0003tO-5l for 44549@debbugs.gnu.org; Thu, 12 Nov 2020 19:02:02 -0500 Received: from Customer-MUA (mua.mxes.net [10.0.0.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.mxes.net (Postfix) with ESMTPSA id 4A51D759BC for <44549@debbugs.gnu.org>; Thu, 12 Nov 2020 19:01:55 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mxes.net; s=mta; t=1605225715; bh=BGIs7qigAQOS3MLUDk6oa+NecNYhZJEkXqZFKNuFHBw=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type; b=S75JAURwD3XV0c0ro7e61WeD+PEujtm6T5foxeCz0J6peaIQz28aq3JZgxh9Ccfty DW03X9pw18fOf5a1zm2Cd5c3HhpE8/pviPo4M6Wqlo1VslsLiNNUOMdvlX9MXR+jBm E01UUf07zO+2YKVLrEKxZiS40uqNonQr4YjWewE0= From: Daniel Brooks Date: Thu, 12 Nov 2020 16:01:54 -0800 Message-ID: <87a6vm6s5p.fsf@db48x.net> MIME-Version: 1.0 Content-Disposition: inline; filename=0001-etc-updates-for-the-guix-daemon-SELinux-policy.patch Content-Description: [PATCH v2] etc: updates for the guix-daemon SELinux policy X-Sent-To: X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: guix-patches@gnu.org List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-patches-bounces+patchwork=mira.cbaines.net@gnu.org Sender: "Guix-patches" X-getmail-retrieved-from-mailbox: Patches From a4262f3ee0feb98d84e0eeb4b86c1575f00e2078 Mon Sep 17 00:00:00 2001 From: Daniel Brooks Date: Mon, 9 Nov 2020 07:03:42 -0800 Subject: [PATCH v2] etc: updates for the guix-daemon SELinux policy * etc/guix-daemon.cil.in (guix_daemon): Specify more permissions for guix-daemon to account for daemon updates and newer SELinux. I can't promise that this is a complete list of everything that guix-daemon needs, but it's probably most of them. It can search for, install, upgrade, and remove packages, create virtual machines and containers, update itself, and so on. --- etc/guix-daemon.cil.in | 175 ++++++++++++++++++++++++++++++++++++----- 1 file changed, 157 insertions(+), 18 deletions(-) diff --git a/etc/guix-daemon.cil.in b/etc/guix-daemon.cil.in index e0c9113498..5de89eb98e 100644 --- a/etc/guix-daemon.cil.in +++ b/etc/guix-daemon.cil.in @@ -1,6 +1,8 @@ ; -*- lisp -*- ;;; GNU Guix --- Functional package management for GNU ;;; Copyright © 2018 Ricardo Wurmus +;;; Copyright © 2020 Daniel Brooks +;;; Copyright © 2020 Marius Bakke ;;; ;;; This file is part of GNU Guix. ;;; @@ -21,6 +23,18 @@ ;; Intermediate Language (CIL). It refers to types that must be defined in ;; the system's base policy. +;; If you, like me, need advice about fixing an SELinux policy, I recommend +;; reading https://danwalsh.livejournal.com/55324.html + +;; In particular, you can run semanage permissive -a guix_daemon.guix_daemon_t +;; to allow guix-daemon to do whatever it wants. SELinux will still check its +;; permissions, and when it doesn't have permission it will still send an +;; audit message to your system logs. This lets you know what permissions it +;; ought to have. Use ausearch --raw to find the permissions violations, then +;; pipe that to audit2allow to generate an updated policy. You'll still need +;; to translate that policy into CIL in order to update this file, but that's +;; fairly straight-forward. Annoying, but easy. + (block guix_daemon ;; Require existing types (typeattributeset cil_gen_require init_t) @@ -34,14 +48,19 @@ (roletype object_r guix_daemon_t) (type guix_daemon_conf_t) (roletype object_r guix_daemon_conf_t) + (typeattributeset file_type guix_daemon_conf_t) (type guix_daemon_exec_t) (roletype object_r guix_daemon_exec_t) + (typeattributeset file_type guix_daemon_exec_t) (type guix_daemon_socket_t) (roletype object_r guix_daemon_socket_t) + (typeattributeset file_type guix_daemon_socket_t) (type guix_store_content_t) (roletype object_r guix_store_content_t) + (typeattributeset file_type guix_store_content_t) (type guix_profiles_t) (roletype object_r guix_profiles_t) + (typeattributeset file_type guix_profiles_t) ;; These types are domains, thereby allowing process rules (typeattributeset domain (guix_daemon_t guix_daemon_exec_t)) @@ -55,6 +74,30 @@ (typetransition guix_store_content_t guix_daemon_exec_t process guix_daemon_t) + (roletype system_r guix_daemon_t) + + ;; allow init_t to read and execute guix files + (allow init_t + guix_profiles_t + (lnk_file (read))) + (allow init_t + guix_daemon_exec_t + (file (execute))) + (allow init_t + guix_daemon_t + (process (transition))) + (allow init_t + guix_store_content_t + (lnk_file (read))) + (allow init_t + guix_store_content_t + (file (open read execute))) + + ;; guix-daemon needs to know the names of users + (allow guix_daemon_t + passwd_file_t + (file (getattr open read))) + ;; Permit communication with NSCD (allow guix_daemon_t nscd_var_run_t @@ -71,25 +114,44 @@ (allow guix_daemon_t nscd_t (unix_stream_socket (connectto))) + (allow guix_daemon_t nscd_t + (nscd (getgrp gethost getpwd getserv shmemgrp shmemhost shmempwd shmemserv))) + + ;; permit downloading packages via HTTP(s) + (allow guix_daemon_t http_port_t + (tcp_socket (name_connect))) + (allow guix_daemon_t ftp_port_t + (tcp_socket (name_connect))) + (allow guix_daemon_t ephemeral_port_t + (tcp_socket (name_connect))) ;; Permit logging and temp file access (allow guix_daemon_t tmp_t - (lnk_file (setattr unlink))) + (lnk_file (create rename setattr unlink))) + (allow guix_daemon_t + tmp_t + (file (link rename create execute execute_no_trans write unlink setattr map relabelto))) + (allow guix_daemon_t + tmp_t + (fifo_file (open read write create getattr ioctl setattr unlink))) (allow guix_daemon_t tmp_t - (dir (create - rmdir + (dir (create rename + rmdir relabelto add_name remove_name open read write getattr setattr search))) + (allow guix_daemon_t + tmp_t + (sock_file (create getattr setattr unlink write))) (allow guix_daemon_t var_log_t (file (create getattr open write))) (allow guix_daemon_t var_log_t - (dir (getattr write add_name))) + (dir (getattr create write add_name))) (allow guix_daemon_t var_run_t (lnk_file (read))) @@ -100,10 +162,10 @@ ;; Spawning processes, execute helpers (allow guix_daemon_t self - (process (fork))) + (process (fork execmem setrlimit setpgid setsched))) (allow guix_daemon_t guix_daemon_exec_t - (file (execute execute_no_trans read open))) + (file (execute execute_no_trans read open entrypoint map))) ;; TODO: unknown (allow guix_daemon_t @@ -119,38 +181,51 @@ ;; Build isolation (allow guix_daemon_t guix_store_content_t - (file (mounton))) + (file (ioctl mounton))) (allow guix_store_content_t fs_t (filesystem (associate))) (allow guix_daemon_t guix_store_content_t - (dir (mounton))) + (dir (read mounton))) (allow guix_daemon_t guix_daemon_t (capability (net_admin fsetid fowner chown setuid setgid dac_override dac_read_search - sys_chroot))) + sys_chroot + sys_admin))) (allow guix_daemon_t fs_t (filesystem (unmount))) + (allow guix_daemon_t + devpts_t + (dir (search))) (allow guix_daemon_t devpts_t (filesystem (mount))) (allow guix_daemon_t devpts_t - (chr_file (setattr getattr))) + (chr_file (ioctl open read write setattr getattr))) (allow guix_daemon_t tmpfs_t - (filesystem (mount))) + (filesystem (getattr mount))) (allow guix_daemon_t tmpfs_t - (dir (getattr))) + (file (create open read unlink write))) + (allow guix_daemon_t + tmpfs_t + (dir (getattr add_name remove_name write))) (allow guix_daemon_t proc_t - (filesystem (mount))) + (file (getattr open read))) + (allow guix_daemon_t + proc_t + (dir (read))) + (allow guix_daemon_t + proc_t + (filesystem (associate mount))) (allow guix_daemon_t null_device_t (chr_file (getattr open read write))) @@ -179,7 +254,7 @@ search rename add_name remove_name open write - rmdir))) + rmdir relabelfrom))) (allow guix_daemon_t guix_store_content_t (file (create @@ -189,7 +264,7 @@ link unlink map rename - open read write))) + open read write relabelfrom))) (allow guix_daemon_t guix_store_content_t (lnk_file (create @@ -197,17 +272,23 @@ link unlink read rename))) + (allow guix_daemon_t + guix_store_content_t + (fifo_file (create getattr open read unlink write))) + (allow guix_daemon_t + guix_store_content_t + (sock_file (create getattr unlink write))) ;; Access to configuration files and directories (allow guix_daemon_t guix_daemon_conf_t - (dir (search + (dir (search create setattr getattr add_name remove_name open read write))) (allow guix_daemon_t guix_daemon_conf_t - (file (create + (file (create rename lock map getattr setattr @@ -216,11 +297,17 @@ (allow guix_daemon_t guix_daemon_conf_t (lnk_file (create getattr rename unlink))) + (allow guix_daemon_t net_conf_t + (file (getattr open read))) + (allow guix_daemon_t net_conf_t + (lnk_file (read))) + (allow guix_daemon_t NetworkManager_var_run_t + (dir (search))) ;; Access to profiles (allow guix_daemon_t guix_profiles_t - (dir (getattr setattr read open))) + (dir (search getattr setattr read write open create add_name))) (allow guix_daemon_t guix_profiles_t (lnk_file (read getattr))) @@ -233,6 +320,17 @@ (allow guix_daemon_t user_home_t (dir (search))) + (allow guix_daemon_t + cache_home_t + (dir (search))) + + ;; self upgrades + (allow guix_daemon_t + self + (dir (add_name write))) + (allow guix_daemon_t + self + (netlink_route_socket (bind create getattr nlmsg_read read write))) ;; Socket operations (allow guix_daemon_t @@ -253,12 +351,53 @@ read write connect bind accept getopt setopt))) + (allow guix_daemon_t + self + (tcp_socket (accept listen bind connect create setopt getopt getattr ioctl read write shutdown))) + (allow guix_daemon_t + unreserved_port_t + (tcp_socket (name_bind name_connect accept listen))) + (allow guix_daemon_t + self + (udp_socket (connect getattr bind getopt setopt))) (allow guix_daemon_t self (fifo_file (write read))) (allow guix_daemon_t self (udp_socket (ioctl create))) + (allow guix_daemon_t + self + (unix_stream_socket (connectto))) + + (allow guix_daemon_t + node_t + (tcp_socket (node_bind))) + (allow guix_daemon_t + node_t + (udp_socket (node_bind))) + (allow guix_daemon_t + port_t + (tcp_socket (name_connect))) + (allow guix_daemon_t + rtp_media_port_t + (udp_socket (name_bind))) + (allow guix_daemon_t + vnc_port_t + (tcp_socket (name_bind))) + + ;; I guess sometimes it needs random numbers + (allow guix_daemon_t + random_device_t + (chr_file (read))) + + ;; guix system vm + (allow guix_daemon_t + kvm_device_t + (chr_file (ioctl open read write))) + (allow guix_daemon_t + kernel_t + (system (ipc_info))) ;; Label file system (filecon "@guix_sysconfdir@/guix(/.*)?" -- 2.26.2