File kvm-preXX-cr8-null-pointer.patch of Package kvm-kmp

This patch addresses bnc#549487 - CVE-2009-3640

--- a/x86/svm.c
+++ b/x86/svm.c
@@ -2334,7 +2334,8 @@ static void update_cr8_intercept(struct
 	struct vmcb *vmcb = svm->vmcb;
 	int max_irr, tpr;
 
-	if (!irqchip_in_kernel(vcpu->kvm) || vcpu->arch.apic->vapic_addr)
+	if (!irqchip_in_kernel(vcpu->kvm) || !vcpu->arch.apic ||
+            vcpu->arch.apic->vapic_addr)
 		return;
 
 	vmcb->control.intercept_cr_write &= ~INTERCEPT_CR8_MASK;