systemd: Add support for --log-target

https://www.freedesktop.org/software/systemd/man/systemd.html#--log-target=

see for discussion: https://github.com/TresysTechnology/refpolicy/pull/22

v2: Add comment about dontaudit rule

Signed-off-by Dominick Grift <[email protected]>

---
 policy/modules/system/systemd.if | 19 +++++++++++++++++
 policy/modules/system/systemd.te | 44 +++++++++++++++++++++++++++-------------
 2 files changed, 49 insertions(+), 14 deletions(-)

policy/modules/system/systemd.if +19 -0

index 3cd6670..705cbaa 100644
@@ -2,6 +2,25 @@
 
 ######################################
 ## <summary>
+##   Make the specified type usable as an
+##   log parse environment type.
+## </summary>
+## <param name="domain">
+##   <summary>
+##     Type to be used as a log parse environment type.
+##   </summary>
+## </param>
+#
+interface(`systemd_log_parse_environment',`
+	gen_require(`
+		attribute systemd_log_parse_env_type;
+	')
+
+	typeattribute $1 systemd_log_parse_env_type;
+')
+
+######################################
+## <summary>
 ##   Read systemd_login PID files.
 ## </summary>
 ## <param name="domain">

policy/modules/system/systemd.te +30 -14

index 60a75fa..6d40952 100644
@@ -12,6 +12,8 @@ policy_module(systemd, 1.1.3)
 ## </desc>
 gen_tunable(systemd_tmpfiles_manage_all, false)
 
+attribute systemd_log_parse_env_type;
+
 type systemd_activate_t;
 type systemd_activate_exec_t;
 init_system_domain(systemd_activate_t, systemd_activate_exec_t)

@@ -113,16 +115,33 @@ init_unit_file(power_unit_t)
 
 ######################################
 #
+# systemd log parse enviroment
+#
+
+# Do not audit setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, ...) failure (e.g. when using create_log_socket() internal function)
+dontaudit systemd_log_parse_env_type self:capability net_admin;
+
+kernel_read_system_state(systemd_log_parse_env_type)
+
+dev_write_kmsg(systemd_log_parse_env_type)
+
+term_use_console(systemd_log_parse_env_type)
+
+init_read_state(systemd_log_parse_env_type)
+
+logging_send_syslog_msg(systemd_log_parse_env_type)
+
+######################################
+#
 # Cgroups local policy
 #
 
 kernel_domtrans_to(systemd_cgroups_t, systemd_cgroups_exec_t)
+kernel_dgram_send(systemd_cgroups_t)
 
 init_stream_connect(systemd_cgroups_t)
 
-logging_send_syslog_msg(systemd_cgroups_t)
-
-kernel_dgram_send(systemd_cgroups_t)
+systemd_log_parse_environment(systemd_cgroups_t)
 
 #######################################
 #

@@ -133,10 +152,10 @@ kernel_read_kernel_sysctls(systemd_locale_t)
 
 files_read_etc_files(systemd_locale_t)
 
-logging_send_syslog_msg(systemd_locale_t)
-
 seutil_read_file_contexts(systemd_locale_t)
 
+systemd_log_parse_environment(systemd_locale_t)
+
 optional_policy(`
 	dbus_connect_system_bus(systemd_locale_t)
 	dbus_system_bus_client(systemd_locale_t)

@@ -151,10 +170,10 @@ kernel_read_kernel_sysctls(systemd_hostnamed_t)
 
 files_read_etc_files(systemd_hostnamed_t)
 
-logging_send_syslog_msg(systemd_hostnamed_t)
-
 seutil_read_file_contexts(systemd_hostnamed_t)
 
+systemd_log_parse_environment(systemd_hostnamed_t)
+
 optional_policy(`
 	dbus_system_bus_client(systemd_hostnamed_t)
 	dbus_connect_system_bus(systemd_hostnamed_t)

@@ -207,13 +226,10 @@ init_start_all_units(systemd_logind_t)
 init_stop_all_units(systemd_logind_t)
 init_service_status(systemd_logind_t)
 init_service_start(systemd_logind_t)
-# This is for reading /proc/1/cgroup
-init_read_state(systemd_logind_t)
 
 locallogin_read_state(systemd_logind_t)
 
-logging_send_syslog_msg(systemd_logind_t)
-
+systemd_log_parse_environment(systemd_logind_t)
 systemd_start_power_units(systemd_logind_t)
 
 udev_read_db(systemd_logind_t)

@@ -234,7 +250,7 @@ optional_policy(`
 allow systemd_sessions_t systemd_sessions_var_run_t:file manage_file_perms;
 files_pid_filetrans(systemd_sessions_t, systemd_sessions_var_run_t, file)
 
-logging_send_syslog_msg(systemd_sessions_t)
+systemd_log_parse_environment(systemd_sessions_t)
 
 #########################################
 #

@@ -260,10 +276,10 @@ auth_manage_login_records(systemd_tmpfiles_t)
 auth_relabel_login_records(systemd_tmpfiles_t)
 auth_setattr_login_records(systemd_tmpfiles_t)
 
-logging_send_syslog_msg(systemd_tmpfiles_t)
-
 seutil_read_file_contexts(systemd_tmpfiles_t)
 
+systemd_log_parse_environment(systemd_tmpfiles_t)
+
 tunable_policy(`systemd_tmpfiles_manage_all',`
 	# systemd-tmpfiles can be configured to manage anything.
 	# have a last-resort option for users to do this.