HypervisorStackGuard

Installing

Patching kernel

• Download & extract Linux Kernel 4.19.24
• Run patch -p0 < kvm.patch from outside of the kernel folder
• Build and install Kernel

Reloading KVM kernel module

make modules -j 2 && make modules_install && rmmod kvm_intel && rmmod kvm && modprobe kvm && modprobe kvm_intel

Running

16-bit kernel

• cd simple_kernel && make && make run
• The hypercall should be logged in the VMM's dmesg

Troubleshooting

`mount: /vagrant: unknown filesystem type 'vboxsf'.``

• Likely because your VirtualBox Guest Additions are out of date. See this article for more details: https://discoposse.com/2016/05/23/autoupdating-virtualbox-guest-additions-with-vagrant-vbguest/
• Try running vagrant plugin install vagrant-vbguest followed by vagrant up