Might be good to add grsec: Apply grsecurity-3.1-4.8.15-201612301949.patch · linux-scraping/linux-grsecurity@31e606a · GitHub to Whonix for KVM
This will be reverted once the VirtualBox devs stop disabling
SMAP unnecessarily, which seems like it will happen never.
Anyone who cares about security of their host system shouldn’t
use VirtualBox, as it already precludes the use of KERNEXEC, UDEREF, and RANDKSTACK.