output: #fixed code
                               @Override
  	public Home createHome(BridgeSettingsDescriptor bridgeSettings) {
  		lifxMap = null;
  		aGsonHandler = null;
  		validLifx = bridgeSettings.isValidLifx();
  		log.info("LifxDevice Home created." + (validLifx ? "" : " No LifxDevices configured."));
  		if(validLifx) {
  	    	try {
  	    		log.info("Open Lifx client....");
  	    		InetAddress configuredAddress = InetAddress.getByName(bridgeSettings.getUpnpConfigAddress());
  	    		NetworkInterface networkInterface = NetworkInterface.getByInetAddress(configuredAddress);
  	    		InetAddress bcastInetAddr = null;
  	            if (networkInterface != null) {
  	                for (InterfaceAddress ifaceAddr : networkInterface.getInterfaceAddresses()) {
  	                    InetAddress addr = ifaceAddr.getAddress();
  	                    if (addr instanceof Inet4Address) {
  	                    	bcastInetAddr = ifaceAddr.getBroadcast();
  	                    	break;
  	                    }
  	                }
  	            }
  	            if(bcastInetAddr != null) {
  		    		lifxMap = new HashMap<String, LifxDevice>();
  		    		log.info("Opening LFX Client with broadcast address: " + bcastInetAddr.getHostAddress());
  		    		client = new LFXClient(bcastInetAddr.getHostAddress());
  		    		client.getLights().addLightCollectionListener(new MyLightListener(lifxMap));
  		    		client.getGroups().addGroupCollectionListener(new MyGroupListener(lifxMap));
  					client.open(false);
  					aGsonHandler =
  							new GsonBuilder()
  							.create();
  	            } else {
  					log.warn("Could not open LIFX, no bcast addr available, check your upnp config address.");
  					client = null;
  					validLifx = false;
  					return this;
  	            }
  			} catch (IOException e) {
  				log.warn("Could not open LIFX, with IO Exception", e);
  				client = null;
  				validLifx = false;
  				return this;
  			} catch (InterruptedException e) {
  				log.warn("Could not open LIFX, with Interruprted Exception", e);
  				client = null;
  				validLifx = false;
  				return this;
  			}
          }
  		return this;
  	}
input: #vulnerable code 
                               @Override
  	public Home createHome(BridgeSettingsDescriptor bridgeSettings) {
  		lifxMap = null;
  		aGsonHandler = null;
  		validLifx = bridgeSettings.isValidLifx();
  		log.info("LifxDevice Home created." + (validLifx ? "" : " No LifxDevices configured."));
  		if(validLifx) {
  	    	try {
  	    		log.info("Open Lifx client....");
  	    		InetAddress configuredAddress = InetAddress.getByName(bridgeSettings.getUpnpConfigAddress());
  	    		NetworkInterface networkInterface = NetworkInterface.getByInetAddress(configuredAddress);
  	    		InetAddress bcastInetAddr = null;
  	            if (networkInterface != null) {
  	                for (InterfaceAddress ifaceAddr : networkInterface.getInterfaceAddresses()) {
  	                    InetAddress addr = ifaceAddr.getAddress();
  	                    if (addr instanceof Inet4Address) {
  	                    	bcastInetAddr = ifaceAddr.getBroadcast();
  	                    	break;
  	                    }
  	                }
  	            }
  	    		lifxMap = new HashMap<String, LifxDevice>();
  	    		log.info("Opening LFX Client with broadcast address: " + bcastInetAddr.getHostAddress());
  	    		client = new LFXClient(bcastInetAddr.getHostAddress());
  	    		client.getLights().addLightCollectionListener(new MyLightListener(lifxMap));
  	    		client.getGroups().addGroupCollectionListener(new MyGroupListener(lifxMap));
  				client.open(false);
  			} catch (IOException e) {
  				log.warn("Could not open LIFX, with IO Exception", e);
  				client = null;
  				return this;
  			} catch (InterruptedException e) {
  				log.warn("Could not open LIFX, with Interruprted Exception", e);
  				client = null;
  				return this;
  			}
  			aGsonHandler =
  					new GsonBuilder()
  					.create();
          }
  		return this;
  	} 
                              #location 23 
                              #vulnerability type NULL_DEREFERENCE