On 1/6/19 1:31 PM, Sugar, David wrote:
The display manager lightdm (and I think gdm) start a dbus binary.
v3 - Updated based on feedback
type=AVC msg=audit(1544626796.378:201): avc: denied { execute } for pid=9973 comm="dbus-launch" name="dbus-daemon" dev="dm-1" ino=6695040 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:dbusd_exec_t:s0 tclass=file permissive=1
type=AVC msg=audit(1544626796.378:201): avc: denied { read open } for pid=9973 comm="dbus-launch" path="/usr/bin/dbus-daemon" dev="dm-1" ino=6695040 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:dbusd_exec_t:s0 tclass=file permissive=1
type=AVC msg=audit(1544626796.378:201): avc: denied { execute_no_trans } for pid=9973 comm="dbus-launch" path="/usr/bin/dbus-daemon" dev="dm-1" ino=6695040 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:dbusd_exec_t:s0 tclass=file permissive=1
type=AVC msg=audit(1544626796.378:201): avc: denied { map } for pid=9973 comm="dbus-daemon" path="/usr/bin/dbus-daemon" dev="dm-1" ino=6695040 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:dbusd_exec_t:s0 tclass=file permissive=1
type=AVC msg=audit(1546551459.112:208): avc: denied { getcap } for pid=6275 comm="dbus-daemon" scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tclass=process permissive=1
type=AVC msg=audit(1546551459.116:209): avc: denied { read } for pid=6275 comm="dbus-daemon" name="995" dev="tmpfs" ino=35210 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:systemd_logind_var_run_t:s0 tclass=file permissive=1
type=AVC msg=audit(1546551459.116:209): avc: denied { open } for pid=6275 comm="dbus-daemon" path="/run/systemd/users/995" dev="tmpfs" ino=35210 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:systemd_logind_var_run_t:s0 tclass=file permissive=1
type=AVC msg=audit(1546551459.116:210): avc: denied { getattr } for pid=6275 comm="dbus-daemon" path="/run/systemd/users/995" dev="tmpfs" ino=35210 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:systemd_logind_var_run_t:s0 tclass=file permissive=1
Signed-off-by: Dave Sugar <dsugar@xxxxxxxxxx>
---
policy/modules/services/dbus.if | 19 +++++++++++++++++++
policy/modules/services/xserver.te | 7 +++++++
2 files changed, 26 insertions(+)
diff --git a/policy/modules/services/dbus.if b/policy/modules/services/dbus.if
index ef829e30..c815791e 100644
--- a/policy/modules/services/dbus.if
+++ b/policy/modules/services/dbus.if
@@ -17,6 +17,25 @@ interface(`dbus_stub',`
')
')
+########################################
+## <summary>
+## Execute dbus in the caller domain.
+## </summary>
+## <param name="domain">
+## <summary>
+## Domain allowed access.
+## </summary>
+## </param>
+#
+interface(`dbus_exec',`
+ gen_require(`
+ type dbusd_exec_t;
+ ')
+
+ corecmd_search_bin($1)
+ can_exec($1, dbusd_exec_t)
+')
+
########################################
## <summary>
## Role access for dbus.
diff --git a/policy/modules/services/xserver.te b/policy/modules/services/xserver.te
index fa7ce88e..c7714d3e 100644
--- a/policy/modules/services/xserver.te
+++ b/policy/modules/services/xserver.te
@@ -566,12 +566,19 @@ optional_policy(`
')
optional_policy(`
+ allow xdm_t self:process getcap;
+
+ dbus_exec(xdm_t)
dbus_system_bus_client(xdm_t)
dbus_connect_system_bus(xdm_t)
optional_policy(`
accountsd_dbus_chat(xdm_t)
')
+
+ optional_policy(`
+ systemd_read_logind_pids(xdm_t)
+ ')
')
optional_policy(`
Merged.
--
Chris PeBenito
