These are changes needed when pam_fallock creates files in /run/faillock
(which is labeled faillog_t). sudo and xdm (and probably other domains)
will create files in this directory for successful and failed login
attempts.
type=AVC msg=audit(1545153126.899:210): avc: denied { search } for pid=8448 comm="lightdm" name="faillock" dev="tmpfs" ino=39318 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:faillog_t:s0 tclass=dir permissive=1
type=AVC msg=audit(1545153131.090:214): avc: denied { write } for pid=8448 comm="lightdm" name="faillock" dev="tmpfs" ino=39318 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:faillog_t:s0 tclass=dir permissive=1
type=AVC msg=audit(1545153131.090:214): avc: denied { add_name } for pid=8448 comm="lightdm" name="dsugar" scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:faillog_t:s0 tclass=dir permissive=1
type=AVC msg=audit(1545153131.090:214): avc: denied { create } for pid=8448 comm="lightdm" name="dsugar" scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:faillog_t:s0 tclass=file permissive=1
type=AVC msg=audit(1545153131.091:215): avc: denied { setattr } for pid=8448 comm="lightdm" name="dsugar" dev="tmpfs" ino=87599 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:faillog_t:s0 tclass=file permissive=1
type=AVC msg=audit(1545167205.531:626): avc: denied { search } for pid=8264 comm="sudo" name="faillock" dev="tmpfs" ino=35405 scontext=sysadm_u:sysadm_r:cleaner_applyconfig_sudo_t:s0-s0:c0.c1023 tcontext=system_u:object_r:faillog_t:s0 tclass=dir permissive=1
type=AVC msg=audit(1545167205.531:627): avc: denied { write } for pid=8264 comm="sudo" name="faillock" dev="tmpfs" ino=35405 scontext=sysadm_u:sysadm_r:cleaner_applyconfig_sudo_t:s0-s0:c0.c1023 tcontext=system_u:object_r:faillog_t:s0 tclass=dir permissive=1
type=AVC msg=audit(1545167205.531:627): avc: denied { add_name } for pid=8264 comm="sudo" name="root" scontext=sysadm_u:sysadm_r:cleaner_applyconfig_sudo_t:s0-s0:c0.c1023 tcontext=system_u:object_r:faillog_t:s0 tclass=dir permissive=1
type=AVC msg=audit(1545167205.531:627): avc: denied { create } for pid=8264 comm="sudo" name="root" scontext=sysadm_u:sysadm_r:cleaner_applyconfig_sudo_t:s0-s0:c0.c1023 tcontext=sysadm_u:object_r:faillog_t:s0 tclass=file permissive=1
Signed-off-by: Dave Sugar <dsugar@xxxxxxxxxx>
---
policy/modules/admin/sudo.if | 2 +-
policy/modules/services/xserver.te | 1 -
policy/modules/system/authlogin.if | 21 +++++++++++++++++++++
3 files changed, 22 insertions(+), 2 deletions(-)
diff --git a/policy/modules/admin/sudo.if b/policy/modules/admin/sudo.if
index 01f408ef..1c1fbe7b 100644
--- a/policy/modules/admin/sudo.if
+++ b/policy/modules/admin/sudo.if
@@ -116,8 +116,8 @@ template(`sudo_role_template',`
auth_run_chk_passwd($1_sudo_t, $2)
# sudo stores a token in the pam_pid directory
auth_manage_pam_pid($1_sudo_t)
+ auth_use_pam($1_sudo_t)
auth_pid_filetrans_pam_var_run($1_sudo_t, dir, "sudo")
- auth_use_nsswitch($1_sudo_t)
init_rw_utmp($1_sudo_t)
diff --git a/policy/modules/services/xserver.te b/policy/modules/services/xserver.te
index cc717e7f..37fb2a71 100644
--- a/policy/modules/services/xserver.te
+++ b/policy/modules/services/xserver.te
@@ -484,7 +484,6 @@ term_setattr_unallocated_ttys(xdm_t)
auth_domtrans_pam_console(xdm_t)
auth_manage_pam_pid(xdm_t)
auth_manage_pam_console_data(xdm_t)
-auth_rw_faillog(xdm_t)
auth_write_login_records(xdm_t)
# Run telinit->init to shutdown.
diff --git a/policy/modules/system/authlogin.if b/policy/modules/system/authlogin.if
index 9b5e0fe0..8d79af78 100644
--- a/policy/modules/system/authlogin.if
+++ b/policy/modules/system/authlogin.if
@@ -47,6 +47,7 @@ interface(`auth_use_pam',`
# for encrypted homedir
dev_read_sysfs($1)
+ auth_create_faillog($1)
auth_domtrans_chk_passwd($1)
auth_domtrans_upd_passwd($1)
auth_dontaudit_read_shadow($1)
@@ -744,6 +745,26 @@ interface(`auth_append_faillog',`
allow $1 faillog_t:file append_file_perms;
')
+########################################
+## <summary>
+## Create fail log lock (in /run/faillock).
+## </summary>
+## <param name="domain">
+## <summary>
+## Domain allowed access.
+## </summary>
+## </param>
+#
+interface(`auth_create_faillog',`
+ gen_require(`
+ type faillog_t;
+ ')
+
+ auth_rw_faillog($1)
+ create_files_pattern($1, faillog_t, faillog_t)
+ setattr_files_pattern($1, faillog_t, faillog_t)
+')
+
########################################
## <summary>
## Read and write the login failure log.
--
2.20.1
