[PATCH] Allow audit daemon to halt system

From: "Sugar, David" <dsugar@tresys.com>
To: "selinux-refpolicy@vger.kernel.org"  <selinux-refpolicy@vger.kernel.org>
Subject: [PATCH] Allow audit daemon to halt system
Date: Mon, 13 Jan 2020 18:28:00 +0000	[thread overview]
Message-ID: <20200113182743.3502993-1-dsugar@tresys.com> (raw)

auditd can halt the system for several reasons based on configuration.
These mostly revovle around audit partition full issues.  I am seeing
the following denials when attempting to halt the system.

Jan 12 03:38:48 localhost audispd: node=localhost type=USER_AVC msg=audit(1578800328.122:1943): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='avc:  denied  { start } for auid=n/a uid=0 gid=0 path="/usr/lib/systemd/system/poweroff.target" cmdline="/sbin/init 0" scontext=system_u:system_r:auditd_t:s0 tcontext=system_u:object_r:power_unit_t:s0 tclass=service exe="/usr/lib/systemd/systemd" sauid=0 hostname=? addr=? terminal=?'
Jan 12 03:38:48 localhost audispd: node=localhost type=USER_AVC msg=audit(1578800328.147:1944): pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='avc:  denied  { status } for auid=n/a uid=0 gid=0 path="/usr/lib/systemd/system/poweroff.target" cmdline="/sbin/init 0" scontext=system_u:system_r:auditd_t:s0 tcontext=system_u:object_r:power_unit_t:s0 tclass=service exe="/usr/lib/systemd/systemd" sauid=0 hostname=? addr=? terminal=?'
Jan 12 04:44:54 localhost audispd: node=localhost type=AVC msg=audit(1578804294.103:1923): avc:  denied  { getattr } for  pid=6936 comm="systemctl" path="/run/systemd/system" dev="tmpfs" ino=45 scontext=system_u:system_r:auditd_t:s0 tcontext=system_u:object_r:systemd_unit_t:s0 tclass=dir permissive=1

Signed-off-by: Dave Sugar <dsugar@tresys.com>
---
 policy/modules/system/logging.te |  6 ++++++
 policy/modules/system/systemd.if | 20 ++++++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/policy/modules/system/logging.te b/policy/modules/system/logging.te
index 73ca3042..69349af0 100644
--- a/policy/modules/system/logging.te
+++ b/policy/modules/system/logging.te
@@ -224,6 +224,12 @@ ifdef(`distro_ubuntu',`
 	')
 ')
 
+ifdef(`init_systemd',`
+	init_list_unit_dirs(auditd_t)
+	systemd_start_power_units(auditd_t)
+	systemd_status_power_units(auditd_t)
+')
+
 optional_policy(`
 	mta_send_mail(auditd_t)
 ')
diff --git a/policy/modules/system/systemd.if b/policy/modules/system/systemd.if
index 0fd37fe8..2e9098a2 100644
--- a/policy/modules/system/systemd.if
+++ b/policy/modules/system/systemd.if
@@ -773,6 +773,26 @@ interface(`systemd_start_power_units',`
 	allow $1 power_unit_t:service start;
 ')
 
+########################################
+## <summary>
+##	Get the system status information about power units
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+#
+interface(`systemd_status_power_units',`
+	gen_require(`
+		type power_unit_t;
+		class service status;
+	')
+
+	allow $1 power_unit_t:service status;
+')
+
+
 ########################################
 ## <summary>
 ##	Make the specified type usable for
-- 
2.24.1

