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Commit 07dc7263 authored by Marcelo Tosatti's avatar Marcelo Tosatti Committed by Avi Kivity
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KVM: read apic->irr with ioapic lock held 



Read ioapic->irr inside ioapic->lock protected section.

KVM-Stable-Tag
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent 3499f4d0

virt/kvm/ioapic.c

+2 −1
Original line number Diff line number Diff line
@@ -192,12 +192,13 @@ static int ioapic_deliver(struct kvm_ioapic *ioapic, int irq) 


int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level)

{

	u32 old_irr = ioapic->irr;

	u32 old_irr;

	u32 mask = 1 << irq;

	union kvm_ioapic_redirect_entry entry;

	int ret = 1;



	spin_lock(&ioapic->lock);

	old_irr = ioapic->irr;

	if (irq >= 0 && irq < IOAPIC_NUM_PINS) {

		entry = ioapic->redirtbl[irq];

		level ^= entry.fields.polarity;