Merge tag 'ecryptfs-3.6-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git...

[karo-tx-linux.git] / arch / x86 / kvm / x86.c

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 148ed666e311fda2979887d6c9e9a2d440f75ffc..2966c847d489d84f1f2b3cb8450daf4bcce1d568 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5113,17 +5113,20 @@ static void post_kvm_run_save(struct kvm_vcpu *vcpu)
                        !kvm_event_needs_reinjection(vcpu);
 }
 
-static void vapic_enter(struct kvm_vcpu *vcpu)
+static int vapic_enter(struct kvm_vcpu *vcpu)
 {
        struct kvm_lapic *apic = vcpu->arch.apic;
        struct page *page;
 
        if (!apic || !apic->vapic_addr)
-               return;
+               return 0;
 
        page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
+       if (is_error_page(page))
+               return -EFAULT;
 
        vcpu->arch.apic->vapic_page = page;
+       return 0;
 }
 
 static void vapic_exit(struct kvm_vcpu *vcpu)
@@ -5430,7 +5433,11 @@ static int __vcpu_run(struct kvm_vcpu *vcpu)
        }
 
        vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
-       vapic_enter(vcpu);
+       r = vapic_enter(vcpu);
+       if (r) {
+               srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
+               return r;
+       }
 
        r = 1;
        while (r > 0) {