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kvm: x86: fix kvm_apic_has_events to check for NULL pointer 

commit ce40cd3fc7fa40a6119e5fe6c0f2bc0eb4541009 upstream.

Malicious (or egregiously buggy) userspace can trigger it, but it
should never happen in normal operation.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Wang Kai <morgan.wang@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Paolo Bonzini 2015-05-30 14:31:24 +02:00 committed by Greg Kroah-Hartman
parent a6bb935312
commit d7a681b77d
1 changed files with 1 additions and 1 deletions
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arch/x86/kvm/lapic.h
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@ -165,7 +165,7 @@ static inline u16 apic_logical_id(struct kvm_apic_map *map, u32 ldr)
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;
}
bool kvm_apic_pending_eoi(struct kvm_vcpu *vcpu, int vector);