When SELinux is configured to use the Multilevel Security (MLS) policy and it is in the enforcing mode, several issues can prevent normal functioning of the operating system, including permissions errors when attempting to mount file systems and the likelihood of a Systemd freeze when booting the operating system.

SELinux in the enforcing mode with the MLS policy is not supported. Note that you can continue to use SELinux in the enforcing mode by using the targeted policy.

(Bug ID 30797389, 30609238)