Commit fe6ed369 authored by Sean Christopherson's avatar Sean Christopherson Committed by Paolo Bonzini
Browse files

KVM: VMX: Add non-canonical check on writes to RTIT address MSRs 



Reject writes to RTIT address MSRs if the data being written is a
non-canonical address as the MSRs are subject to canonical checks, e.g.
KVM will trigger an unchecked #GP when loading the values to hardware
during pt_guest_enter().

Cc: stable@vger.kernel.org
Signed-off-by: default avatarSean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 311497e0

arch/x86/kvm/vmx/vmx.c

+2 −0
Original line number Diff line number Diff line
@@ -2144,6 +2144,8 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) 
			(index >= 2 * intel_pt_validate_cap(vmx->pt_desc.caps,

					PT_CAP_num_address_ranges)))

			return 1;

		if (is_noncanonical_address(data, vcpu))

			return 1;

		if (index % 2)

			vmx->pt_desc.guest.addr_b[index / 2] = data;

		else