KVM: nVMX: Fix erroneous exception bitmap check

The code which checks whether to inject a pagefault to L1 or L2 (in
nested VMX) was wrong, incorrect in how it checked the PF_VECTOR bit.
Thanks to Dan Carpenter for spotting this.

Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 4a722a0b8e1..2c22fc788da 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -1664,7 +1664,7 @@ static int nested_pf_handled(struct kvm_vcpu *vcpu)
         struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
 
         /* TODO: also check PFEC_MATCH/MASK, not just EB.PF. */
-        if (!(vmcs12->exception_bitmap & PF_VECTOR))
+        if (!(vmcs12->exception_bitmap & (1u << PF_VECTOR)))
                 return 0;
 
         nested_vmx_vmexit(vcpu);