KVM: x86: fix APIC physical destination wrapping
x2apic allows destinations > 0xff and we don't want them delivered to
lower APICs. They are correctly handled by doing nothing.
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 541e178..bd82054 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -693,7 +693,10 @@
ret = true;
if (irq->dest_mode == 0) { /* physical mode */
- dst = &map->phys_map[irq->dest_id & 0xff];
+ if (irq->dest_id >= ARRAY_SIZE(map->phys_map))
+ goto out;
+
+ dst = &map->phys_map[irq->dest_id];
} else {
u32 mda = irq->dest_id << (32 - map->ldr_bits);