Red Hat Bugzilla – Bug 1308937
systemd-logind cannot start in MLS (Unknown permission start for class system)
Last modified: 2017-01-02 09:50:44 EST
Description of problem:
When I login in MLS systemd-logind does not start. I see this USER_AVC and systemd-logind aborts:
Feb 16 14:53:13 cc-vtoe11b.lab.eng.brq.redhat.com audit: USER_AVC pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0-s15:c0.c1023 msg='Unknown permission start for class system exe="/
usr/lib/systemd/systemd" sauid=0 hostname=? addr=? terminal=?'
Feb 16 14:53:13 cc-vtoe11b.lab.eng.brq.redhat.com systemd-logind: Failed to start user slice: Access denied
Feb 16 14:53:13 cc-vtoe11b.lab.eng.brq.redhat.com systemd-logind: Assertion 's->user->slice' failed at src/login/logind-session.c:501, function session_start_scope(). Aborting.
Feb 16 14:53:13 cc-vtoe11b.lab.eng.brq.redhat.com systemd-coredump: Process 2277 (systemd-logind) of user 0 dumped core.
Stack trace of thread 2277:
#0 0x00007fd7adac0a98 raise (libc.so.6)
#1 0x00007fd7adac269a abort (libc.so.6)
#2 0x00005578294c8562 log_assert_failed (systemd-logind)
#3 0x00005578294fb3df session_start (systemd-logind)
#4 0x00005578294e8f57 method_create_session.lto_priv.390 (systemd-logind)
#5 0x00005578294b965d object_find_and_run.lto_priv.203 (systemd-logind)
#6 0x00005578294dbed3 bus_process_internal.constprop.100 (systemd-logind)
#7 0x00005578295057e1 io_callback (systemd-logind)
#8 0x0000557829514263 source_dispatch.lto_priv.359 (systemd-logind)
#9 0x00005578294bc3ef main (systemd-logind)
#10 0x00007fd7adaac580 __libc_start_main (libc.so.6)
#11 0x00005578294bc969 _start (systemd-logind)
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Have an MLS system with enabled audit
2. Login via ssh
3. Check audit.log and journalctl
systemd-logind works as expected
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Booting in permissive and restarting systemd-logind in both permissive and enforcing (mls) seems to work without errors - the logind process is running and I see no tracebacks in 'journalctl -u systemd-logind' and no AVCs in audit log.
I cannot log in via serial console in enforcing due to
Cannot make/remove an entry for the specified session
but as far as I can tell, this is not the logind issue described above.