newrole: allow newrole to search faillock runtime directory

Allow newrole to search the /run/faillock directory, otherwise the
faillock mechanism will not work for neworle.

Before the patch (pam faillock deny=3):
root@intel-x86-64:~# newrole -r sysadm_r
Password:
newrole: incorrect password for root
root@intel-x86-64:~# newrole -r sysadm_r
Password:
newrole: incorrect password for root
root@intel-x86-64:~# newrole -r sysadm_r
Password:
newrole: incorrect password for root
root@intel-x86-64:~# newrole -r sysadm_r
Password:
newrole: incorrect password for root

After the patch (pam faillock deny=3):
root@intel-x86-64:~# newrole  -r sysadm_r
Password:
newrole: incorrect password for root
root@intel-x86-64:~# newrole -r sysadm_r
Password:
newrole: incorrect password for root
root@intel-x86-64:~# newrole -r sysadm_r
Password:
newrole: incorrect password for root
root@intel-x86-64:~# newrole -r sysadm_r
The account is locked due to 3 failed logins.
(1 minute left to unlock)
Password:

Fixes:
avc: denied { search } for pid=508 comm="newrole" name="faillock"
dev="tmpfs" ino=582 scontext=root:sysadm_r:newrole_t:s0-s15:c0.c1023
tcontext=system_u:object_r:faillog_t:s0 tclass=dir permissive=0

Signed-off-by: Yi Zhao <[email protected]>

policy/modules/system/authlogin.if

@@ -938,6 +938,24 @@ interface(`auth_setattr_faillog_files',`
 	setattr_files_pattern($1, faillog_t, faillog_t)
 ')
 
+########################################
+## <summary>
+##	Search faillock dirs (/run/faillock).
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+#
+interface(`auth_search_faillog_dirs',`
+	gen_require(`
+		type faillog_t;
+	')
+
+	allow $1 faillog_t:dir search_dir_perms;
+')
+
 #######################################
 ## <summary>
 ##	Read the last logins log.

policy/modules/system/selinuxutil.te

@@ -294,6 +294,7 @@ auth_use_nsswitch(newrole_t)
 auth_run_chk_passwd(newrole_t, newrole_roles)
 auth_run_upd_passwd(newrole_t, newrole_roles)
 auth_rw_faillog(newrole_t)
+auth_search_faillog_dirs(newrole_t)
 
 # Write to utmp.
 init_rw_utmp(newrole_t)