Check GetNADs length

There is a small chance that a network will not have any NADs.
Ensure that this is covered.

Signed-off-by: Patryk Diak <[email protected]>

Author: kyrtapz

go-controller/pkg/clustermanager/endpointslicemirror/endpointslice_mirror_controller.go

@@ -434,7 +434,7 @@ func (c *Controller) mirrorEndpointSlice(mirroredEndpointSlice, defaultEndpointS
 	}
 	for i, endpoint := range defaultEndpointSlice.Endpoints {
 		if endpoint.TargetRef != nil && endpoint.TargetRef.Kind == "Pod" {
-			podIP, err := c.getPodIP(endpoint.TargetRef.Name, endpoint.TargetRef.Namespace, network.GetNADs()[0], isIPv6)
+			podIP, err := c.getPodIP(endpoint.TargetRef.Name, endpoint.TargetRef.Namespace, nadList[0], isIPv6)
 			if err != nil {
 				return nil, fmt.Errorf("failed to determine the Pod IP of: %s/%s: %v", endpoint.TargetRef.Namespace, endpoint.TargetRef.Name, err)
 			}

go-controller/pkg/clustermanager/routeadvertisements/controller.go

@@ -222,7 +222,10 @@ func (c *Controller) ReconcileNetwork(_ string, old, new util.NetInfo) {
 	}
 	if new != nil && !newNamespaces.Equal(oldNamespaces) {
 		// we use one of the NADs of the network to reconcile it
-		c.nadController.Reconcile(new.GetNADs()[0])
+		nads := new.GetNADs()
+		if len(nads) > 0 {
+			c.nadController.Reconcile(nads[0])
+		}
 		// if the namespaces served by a network changed, it is possible that
 		// those namespaces are served or no longer served by the default
 		// network, so reconcile it as well