Fix panic while provisioning Azure security group rules

pkg/cloudprovider/providers/azure/azure_loadbalancer.go

@@ -889,8 +889,8 @@ func (az *Cloud) reconcileSecurityGroup(clusterName string, service *v1.Service,
 	// update security rules
 	dirtySg := false
 	var updatedRules []network.SecurityRule
-	if sg.SecurityRules != nil {
-		updatedRules = *sg.SecurityRules
+	if sg.SecurityGroupPropertiesFormat != nil && sg.SecurityGroupPropertiesFormat.SecurityRules != nil {
+		updatedRules = *sg.SecurityGroupPropertiesFormat.SecurityRules
 	}
 
 	for _, r := range updatedRules {

pkg/cloudprovider/providers/azure/azure_wrap.go

@@ -153,6 +153,10 @@ func (az *Cloud) getAzureLoadBalancer(name string) (lb network.LoadBalancer, exi
 }
 
 func (az *Cloud) getSecurityGroup() (nsg network.SecurityGroup, err error) {
+	if az.SecurityGroupName == "" {
+		return nsg, fmt.Errorf("securityGroupName is not configured")
+	}
+
 	securityGroup, err := az.nsgCache.Get(az.SecurityGroupName)
 	if err != nil {
 		return nsg, err