[systemd-devel] Upgrade 232 -> 233: user at XXX.service: Failed at step PAM spawning...

[Vlad]

Hello,

I've recently updated systemd and now user session is failing to start:
Apr 29 11:04:02 xxx systemd[550]: user at xxx.service: Failed at step PAM
spawning /usr/lib/systemd/systemd: Operation not permitted
Apr 29 11:04:02 xxx systemd[1]: Failed to start User Manager for UID xxx.
Apr 29 11:04:02 xxx lightdm[535]: pam_systemd(lightdm:session): Failed
to create session: Start job for unit user at xxx.service failed with 'failed'

Apparently the previous version gives similar error as well, but doesn't
fail to start user session:
Apr 29 11:09:37 xxx systemd[565]: user at xxx.service: Failed at step PAM
spawning /usr/lib/systemd/systemd: Operation not permitted
Apr 29 11:09:37 xxx systemd[1]: Started User Manager for UID xxx.

I'd appreciate any thoughts about this issue.

Regards,
Vlad.