tigervnc/unix/vncserver/tigervnc.pam

#%PAM-1.0
# pam_selinux.so close should be the first session rule
-session   required     pam_selinux.so close
session    required     pam_loginuid.so
-session   required     pam_selinux.so open
session    required     pam_namespace.so
session    optional     pam_keyinit.so force revoke
session    required     pam_limits.so
-session   optional     pam_systemd.so
session    required     pam_unix.so
-session   optional     pam_reauthorize.so prepare