HVM-409 panic in kvm_free_irq_routing

1 files changed, 6 insertions, 4 deletions

diff --git a/kvm_irq_comm.c b/kvm_irq_comm.c
index d8f259d..82dfd4a 100644
--- a/kvm_irq_comm.c
+++ b/kvm_irq_comm.c
@@ -392,13 +392,15 @@ out:
 	return (r);
 }
 
+/*
+ * Called only during vm destruction. Nobody can use the pointer at this stage
+ */
 void
 kvm_free_irq_routing(struct kvm *kvm)
 {
-	/*
-	 * Called only during vm destruction. Nobody can use the pointer
-	 * at this stage
-	 */
+	if (kvm->irq_routing == NULL)
+		return;
+
 	kmem_free(kvm->irq_routing->rt_entries, kvm->irq_routing_sz);
 	kmem_free(kvm->irq_routing, sizeof (struct kvm_irq_routing_table));
 }