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* [PATCH 4/4-v2] Allow ntpd to read unit files
@ 2019-03-26 22:00 Sugar, David
  2019-03-27 22:50 ` Chris PeBenito
  0 siblings, 1 reply; 2+ messages in thread
From: Sugar, David @ 2019-03-26 22:00 UTC (permalink / raw)
  To: selinux-refpolicy

Adding missing documenation (sorry about that).

type=AVC msg=audit(1553013917.359:9935): avc:  denied  { read } for  pid=16326 comm="systemd-timedat" name="50-chronyd.list" dev="dm-1" ino=4870675 scontext=system_u:system_r:ntpd_t:s0 tcontext=system_u:object_r:ntpd_unit_t:s0 tclass=file permissive=1
type=AVC msg=audit(1553013917.359:9935): avc:  denied  { open } for  pid=16326 comm="systemd-timedat" path="/usr/lib/systemd/ntp-units.d/50-chronyd.list" dev="dm-1" ino=4870675 scontext=system_u:system_r:ntpd_t:s0 tcontext=system_u:object_r:ntpd_unit_t:s0 tclass=file permissive=1
type=AVC msg=audit(1553013917.359:9936): avc:  denied  { getattr } for  pid=16326 comm="systemd-timedat" path="/usr/lib/systemd/ntp-units.d/50-chronyd.list" dev="dm-1" ino=4870675 scontext=system_u:system_r:ntpd_t:s0 tcontext=system_u:object_r:ntpd_unit_t:s0 tclass=file permissive=1

type=AVC msg=audit(1553013821.622:9902): avc:  denied  { getattr } for  pid=16281 comm="systemd-timedat" path="/usr/lib/systemd/ntp-units.d" dev="dm-1" ino=4700094 scontext=system_u:system_r:ntpd_t:s0 tcontext=system_u:object_r:systemd_unit_t:s0 tclass=dir permissive=1
type=AVC msg=audit(1553013821.622:9903): avc:  denied  { read } for  pid=16281 comm="systemd-timedat" name="ntp-units.d" dev="dm-1" ino=4700094 scontext=system_u:system_r:ntpd_t:s0 tcontext=system_u:object_r:systemd_unit_t:s0 tclass=dir permissive=1
type=AVC msg=audit(1553013821.622:9903): avc:  denied  { open } for  pid=16281 comm="systemd-timedat" path="/usr/lib/systemd/ntp-units.d" dev="dm-1" ino=4700094 scontext=system_u:system_r:ntpd_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/services/ntp.te |  3 +++
 policy/modules/system/init.if  | 20 ++++++++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/policy/modules/services/ntp.te b/policy/modules/services/ntp.te
index a95bf21d..982d6a4c 100644
--- a/policy/modules/services/ntp.te
+++ b/policy/modules/services/ntp.te
@@ -138,10 +138,13 @@ userdom_dontaudit_use_unpriv_user_fds(ntpd_t)
 userdom_list_user_home_dirs(ntpd_t)
 
 ifdef(`init_systemd',`
+	allow ntpd_t ntpd_unit_t:file read_file_perms;
+
 	dbus_system_bus_client(ntpd_t)
 	dbus_connect_system_bus(ntpd_t)
 	init_dbus_chat(ntpd_t)
 	init_get_system_status(ntpd_t)
+	init_list_unit_dirs(ntpd_t)
 	# for /var/lib/systemd/timesync
 	init_read_var_lib_links(ntpd_t)
 	allow ntpd_t self:capability { fowner setpcap };
diff --git a/policy/modules/system/init.if b/policy/modules/system/init.if
index 2a17910e..be2c0a70 100644
--- a/policy/modules/system/init.if
+++ b/policy/modules/system/init.if
@@ -2960,6 +2960,26 @@ interface(`init_search_units',`
 	fs_search_tmpfs($1)
 ')
 
+######################################
+## <summary>
+##	List systemd unit dirs.
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+#
+interface(`init_list_unit_dirs',`
+	gen_require(`
+		type systemd_unit_t;
+	')
+
+	allow $1 systemd_unit_t:dir list_dir_perms;
+
+	init_search_units($1)
+')
+
 ########################################
 ## <summary>
 ##	Read systemd unit links
-- 
2.20.1


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2019-03-26 22:00 [PATCH 4/4-v2] Allow ntpd to read unit files Sugar, David
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