This patch is creating a new domain for /usr/bin/chronyc. This is a cli program that talks to a running chronyd process. chronyc is used by chrony-wait.service and I was seeing chronyc running in the init_t domain when started this way.
Interface name updated based on suggestions.
Signed-off-by: Dave Sugar <[email protected]>
---
chronyd.fc | 1 +
chronyd.if | 20 ++++++++++++++++++++
chronyd.te | 46 ++++++++++++++++++++++++++++++++++++++++++++--
3 files changed, 65 insertions(+), 2 deletions(-)
diff --git a/chronyd.fc b/chronyd.fc
index 3a5dad7..7d4d1c1 100644
--- a/chronyd.fc
+++ b/chronyd.fc
@@ -9,6 +9,7 @@
/usr/lib/systemd/system/[^/]*chrony-wait.* -- gen_context(system_u:object_r:chronyd_unit_t,s0)
/usr/lib/systemd/system/[^/]*chronyd.* -- gen_context(system_u:object_r:chronyd_unit_t,s0)
+/usr/bin/chronyc -- gen_context(system_u:object_r:chronyc_exec_t,s0)
/usr/sbin/chronyd -- gen_context(system_u:object_r:chronyd_exec_t,s0)
/var/lib/chrony(/.*)? gen_context(system_u:object_r:chronyd_var_lib_t,s0)
diff --git a/chronyd.if b/chronyd.if
index a42bc4f..3298891 100644
--- a/chronyd.if
+++ b/chronyd.if
@@ -252,6 +252,26 @@ interface(`chronyd_status',`
allow $1 chronyd_unit_t:service status;
')
+########################################
+## <summary>
+## Send to chronyd command line interface using a unix domain
+## datagram socket.
+## </summary>
+## <param name="domain">
+## <summary>
+## Domain allowed access.
+## </summary>
+## </param>
+#
+interface(`chronyd_dgram_send_cli',`
+ gen_require(`
+ type chronyc_t, chronyd_var_run_t;
+ ')
+
+ files_search_pids($1)
+ dgram_send_pattern($1, chronyd_var_run_t, chronyd_var_run_t, chronyc_t)
+')
+
####################################
## <summary>
## All of the rules required to
diff --git a/chronyd.te b/chronyd.te
index f28dd5e..0634548 100644
--- a/chronyd.te
+++ b/chronyd.te
@@ -9,6 +9,10 @@ type chronyd_t;
type chronyd_exec_t;
init_daemon_domain(chronyd_t, chronyd_exec_t)
+type chronyc_t;
+type chronyc_exec_t;
+init_daemon_domain(chronyc_t, chronyc_exec_t)
+
type chronyd_conf_t;
files_config_file(chronyd_conf_t)
@@ -35,10 +39,10 @@ init_daemon_pid_file(chronyd_var_run_t, dir, "chrony")
########################################
#
-# Local policy
+# chronyd local policy
#
-allow chronyd_t self:capability { dac_override ipc_lock setgid setuid sys_resource sys_time };
+allow chronyd_t self:capability { chown dac_override ipc_lock setgid setuid sys_resource sys_time };
allow chronyd_t self:process { getcap setcap setrlimit signal };
allow chronyd_t self:shm create_shm_perms;
allow chronyd_t self:fifo_file rw_fifo_file_perms;
@@ -91,6 +95,7 @@ logging_send_syslog_msg(chronyd_t)
miscfiles_read_localization(chronyd_t)
+chronyd_dgram_send_cli(chronyd_t)
chronyd_read_config(chronyd_t)
optional_policy(`
@@ -100,3 +105,40 @@ optional_policy(`
optional_policy(`
mta_send_mail(chronyd_t)
')
+
+########################################
+#
+# chronyc local policy
+#
+
+allow chronyc_t self:capability { dac_override };
+allow chronyc_t self:process { signal };
+allow chronyc_t self:udp_socket create_socket_perms;
+allow chronyc_t self:netlink_route_socket create_netlink_socket_perms;
+
+manage_dirs_pattern(chronyc_t, chronyd_var_run_t, chronyd_var_run_t)
+manage_files_pattern(chronyc_t, chronyd_var_run_t, chronyd_var_run_t)
+manage_sock_files_pattern(chronyc_t, chronyd_var_run_t, chronyd_var_run_t)
+files_pid_filetrans(chronyc_t, chronyd_var_run_t, { dir file sock_file })
+
+corenet_all_recvfrom_unlabeled(chronyc_t)
+corenet_all_recvfrom_netlabel(chronyc_t)
+corenet_udp_sendrecv_generic_if(chronyc_t)
+corenet_udp_sendrecv_generic_node(chronyc_t)
+
+corenet_sendrecv_chronyd_client_packets(chronyc_t)
+corenet_udp_sendrecv_chronyd_port(chronyc_t)
+
+files_read_etc_files(chronyc_t)
+files_read_usr_files(chronyc_t)
+
+logging_send_syslog_msg(chronyc_t)
+
+sysnet_read_config(chronyc_t)
+sysnet_dns_name_resolve(chronyc_t)
+
+miscfiles_read_localization(chronyc_t)
+
+chronyd_dgram_send(chronyc_t)
+chronyd_read_config(chronyc_t)
+
--
2.14.3