Otherwise kvm might attempt to dereference a NULL pointer.
CC: stable@xxxxxxxxxx
Signed-off-by: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
Index: kvm/virt/kvm/irq_comm.c
===================================================================
--- kvm.orig/virt/kvm/irq_comm.c
+++ kvm/virt/kvm/irq_comm.c
@@ -243,6 +243,10 @@ void kvm_free_irq_source_id(struct kvm *
printk(KERN_ERR "kvm: IRQ source ID out of range!\n");
goto unlock;
}
+ clear_bit(irq_source_id, &kvm->arch.irq_sources_bitmap);
+ if (!irqchip_in_kernel(kvm))
+ goto unlock;
+
for (i = 0; i < KVM_IOAPIC_NUM_PINS; i++) {
clear_bit(irq_source_id, &kvm->arch.vioapic->irq_states[i]);
if (i >= 16)
@@ -251,7 +255,6 @@ void kvm_free_irq_source_id(struct kvm *
clear_bit(irq_source_id, &pic_irqchip(kvm)->irq_states[i]);
#endif
}
- clear_bit(irq_source_id, &kvm->arch.irq_sources_bitmap);
unlock:
mutex_unlock(&kvm->irq_lock);
}
--
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