mls stuff

Here are the patches I used last time I tried to get MLS going on Debian.

policy/modules/kernel/kernel.te

@@ -39,6 +39,7 @@ role unconfined_r;
 ifdef(`enable_mls',`
 	role secadm_r;
 	role auditadm_r;
+	mls_process_set_level(kernel_t)
 ')
 
 #

policy/modules/system/init.te

@@ -191,6 +191,7 @@ mls_file_read_all_levels(init_t)
 mls_file_write_all_levels(init_t)
 mls_process_write_all_levels(init_t)
 mls_fd_use_all_levels(init_t)
+mls_process_set_level(init_t)
 
 # the following one is needed for libselinux:is_selinux_enabled()
 # otherwise the call fails and sysvinit tries to load the policy
@@ -384,6 +385,8 @@ ifdef(`init_systemd',`
 
 	# systemd_socket_activated policy
 	mls_socket_write_all_levels(init_t)
+	# read from systemd-journal and similar
+	mls_socket_read_to_clearance(init_t)
 
 	selinux_unmount_fs(init_t)
 	selinux_validate_context(init_t)

policy/modules/system/logging.if

@@ -422,6 +422,9 @@ interface(`logging_domtrans_syslog',`
 
 	corecmd_search_bin($1)
 	domtrans_pattern($1, syslogd_exec_t, syslogd_t)
+	ifdef(`enable_mls',`
+		range_transition $1 syslogd_exec_t:process mls_systemhigh;
+	')
 ')
 
 ########################################

policy/modules/system/systemd.te

@@ -251,7 +251,13 @@ systemd_log_parse_environment(systemd_gpt_generator_t)
 
 allow systemd_cgroups_t self:capability net_admin;
 
-kernel_domtrans_to(systemd_cgroups_t, systemd_cgroups_exec_t)
+ifdef(`enable_mls',`
+	kernel_ranged_domtrans_to(systemd_cgroups_t, systemd_cgroups_exec_t, s0 - mls_systemhigh)
+	mls_fd_use_all_levels(systemd_cgroups_t)
+',`
+	kernel_domtrans_to(systemd_cgroups_t, systemd_cgroups_exec_t)
+')
+
 kernel_dgram_send(systemd_cgroups_t)
 # for /proc/cmdline
 kernel_read_system_state(systemd_cgroups_t)