PSA: Workarounds for CentOS 7.3 Problems with SE Linux 2.5

PSA: If you update to CentOS 7.3 and see odd errors like this resulting in a hung boot:

Failed to start Import network configuration from initramfs

and/or

work still pending
FAILED Failed to start Login Service.
See 'systemctl status systemd-logind.service' for details.
FAILED Failed to start Authorization Manager.
See 'systemctl status polkit.service' for details.
DEPEND Dependency failed for Dynamic System Tuning Daemon.

then you have a problem with CentOS 7.3 and SE Linux 2.5.

The workarounds are:

1. don’t upgrade until CentOS 7.4
2. add selinux=0 to the kernel boot line in grub.

ask.fedoraproject.org: Startup fails with multiple errors
http://danwalsh.livejournal.com/38157.html

Keywords: Virtualbox, linux, selinux, enforcing.