Information
Configure AppArmor to be enabled at boot time and verify that it has not been overwritten by the bootloader boot parameters.
Note: This recommendation is designed around the grub bootloader, if LILO or another bootloader is in use in your environment enact equivalent settings.
AppArmor must be enabled at boot time in your bootloader configuration to ensure that the controls it provides are not overridden.
Solution
Edit /etc/default/grub and add the apparmor=1 and security=apparmor parameters to the GRUB_CMDLINE_LINUX= line
GRUB_CMDLINE_LINUX="apparmor=1 security=apparmor"
Run the following command to update the grub2 configuration:
# update-grub