I do a frequent set of partition reformats as I develop software.
If I fail to run "sudo systemctl daemon-reload", and the reboot is blocked, I have one option.
Format a USB with the Everything.iso and use the recovery option from the Everything.iso grub menu.

The menu will direct the user to the system selected.

That Everything.iso recovery software will set a .autorelabel to root, and hopefully, on reboot, Linux recovery proceeds.  Failure or not, recovery is a VERY LONG PROCEDURE 
Many times, recovery fails (looping). It is then faster and easier to just do a reinstallation. 

 

Reproducible: Sometimes

Steps to Reproduce:
1.  Update /etc/fstab
2.  reboot
3.
Result is system access disabled via SELinux
Actual Results:  
As above


Is there a way, before the user doing a reboot, or when the reboot starts, and the Selinux routine notes that the saved /etc/fstab does not match the updated /etc/fstab,
For the system to prompt to run "sudo systemctl daemon-reload"  BEFORE completing the reboot process.

Recovery should not have to take anywhere from minutes to hours.

My request for filing the bug is for PRODUCT IMPROVEMENT.+