test_invalid_guest_memfd
test_invalid_guest_memfd(vm, vm->kvm_fd, 0, "KVM fd should fail");
test_invalid_guest_memfd(vm, vm->fd, 0, "VM's fd should fail");
test_invalid_guest_memfd(vm, memfd, 0, "Regular memfd() should fail");
test_invalid_guest_memfd(vm, memfd, 0, "Other VM's guest_memfd() should fail");
test_invalid_guest_memfd(vm, memfd, i, "Unaligned offset should fail");