Commit f1b026a3 authored Nov 05, 2017 by Wanpeng Li Committed by Paolo Bonzini Nov 17, 2017

KVM: nVMX: Validate the IA32_BNDCFGS on nested VM-entry



According to the SDM, if the "load IA32_BNDCFGS" VM-entry controls is 1, the
following checks are performed on the field for the IA32_BNDCFGS MSR:
 - Bits reserved in the IA32_BNDCFGS MSR must be 0.
 - The linear address in bits 63:12 must be canonical.

Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Jim Mattson <jmattson@google.com>
Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>

parent 3853be26

arch/x86/kvm/vmx.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -10876,6 +10876,11 @@ static int check_vmentry_postreqs(struct kvm_vcpu vcpu, struct vmcs12 vmcs12,
		return 1;
		}

		if ((vmcs12->vm_entry_controls & VM_ENTRY_LOAD_BNDCFGS) &&
		(is_noncanonical_address(vmcs12->guest_bndcfgs & PAGE_MASK, vcpu) \|\|
		(vmcs12->guest_bndcfgs & MSR_IA32_BNDCFGS_RSVD)))
		return 1;

		return 0;
		}