Description of problem: /usr/bin/sddm is labeled bin_t and runs in initrc_t. Presumably it should be labeled xdm_exec_t. When labeled xdm_exec_t I see the following denials in permissive mode: type=AVC msg=audit(1381425470.880:160): avc: denied { write } for pid=1226 comm="xauth" name="sddm" dev="tmpfs" ino=11273 scontext=system_u:system_r:xauth_t:s0-s0:c0.c1023 tcontext=system_u:object_r:var_run_t:s0 tclass=dir type=AVC msg=audit(1381425470.880:160): avc: denied { add_name } for pid=1226 comm="xauth" name="A:0-Lsrash-c" scontext=system_u:system_r:xauth_t:s0-s0:c0.c1023 tcontext=system_u:object_r:var_run_t:s0 tclass=dir type=AVC msg=audit(1381425470.880:160): avc: denied { create } for pid=1226 comm="xauth" name="A:0-Lsrash-c" scontext=system_u:system_r:xauth_t:s0-s0:c0.c1023 tcontext=system_u:object_r:var_run_t:s0 tclass=file type=AVC msg=audit(1381425470.880:160): avc: denied { open } for pid=1226 comm="xauth" path="/run/sddm/A:0-Lsrash-c" dev="tmpfs" ino=20485 scontext=system_u:system_r:xauth_t:s0-s0:c0.c1023 tcontext=system_u:object_r:var_run_t:s0 tclass=file type=AVC msg=audit(1381425470.881:161): avc: denied { link } for pid=1226 comm="xauth" name="A:0-Lsrash-c" dev="tmpfs" ino=20485 scontext=system_u:system_r:xauth_t:s0-s0:c0.c1023 tcontext=system_u:object_r:var_run_t:s0 tclass=file type=AVC msg=audit(1381425470.882:162): avc: denied { remove_name } for pid=1226 comm="xauth" name="A:0-Lsrash-n" dev="tmpfs" ino=20486 scontext=system_u:system_r:xauth_t:s0-s0:c0.c1023 tcontext=system_u:object_r:var_run_t:s0 tclass=dir type=AVC msg=audit(1381425470.882:162): avc: denied { unlink } for pid=1226 comm="xauth" name="A:0-Lsrash-n" dev="tmpfs" ino=20486 scontext=system_u:system_r:xauth_t:s0-s0:c0.c1023 tcontext=system_u:object_r:var_run_t:s0 tclass=file type=AVC msg=audit(1381425470.947:163): avc: denied { open } for pid=1229 comm="sddm-greeter" path="/run/sddm/A:0-Lsrash" dev="tmpfs" ino=20486 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:var_run_t:s0 tclass=file type=AVC msg=audit(1381425470.947:164): avc: denied { getattr } for pid=1229 comm="sddm-greeter" path="/run/sddm/A:0-Lsrash" dev="tmpfs" ino=20486 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=system_u:object_r:var_run_t:s0 tclass=file Version-Release number of selected component (if applicable): selinux-policy-3.12.1-75.fc20.noarch
Looks like this got fixed a while back.