From ce40cd3fc7fa40a6119e5fe6c0f2bc0eb4541009 Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Sat, 30 May 2015 14:31:24 +0200
Subject: [PATCH] kvm: x86: fix kvm_apic_has_events to check for NULL pointer
Malicious (or egregiously buggy) userspace can trigger it, but it
should never happen in normal operation.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
arch/x86/kvm/lapic.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kvm/lapic.h b/arch/x86/kvm/lapic.h
index 71b150cae5f9..9d8fcde52027 100644
--- a/arch/x86/kvm/lapic.h
+++ b/arch/x86/kvm/lapic.h
@@ -150,7 +150,7 @@ static inline bool kvm_apic_vid_enabled(struct kvm *kvm)
static inline bool kvm_apic_has_events(struct kvm_vcpu *vcpu)
{
- return vcpu->arch.apic->pending_events;
+ return kvm_vcpu_has_lapic(vcpu) && vcpu->arch.apic->pending_events;
}
static inline bool kvm_lowest_prio_delivery(struct kvm_lapic_irq *irq)
--
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