Potential leak of an object stor

SCNetworkReachabilityRef reachability = SCNetworkReachabilityCreateWithAddress(kCFAllocatorDefault, hostAddress);

Reachability* returnValue =NULL;

if(reachability !=NULL)

{

returnValue = [[selfalloc]init];

if(returnValue !=NULL)

{

returnValue->_reachabilityRef= reachability;

}

        else{

            CFRelease(reachability);

        }

}

returnreturnValue;

https://developer.apple.com/library/archive/samplecode/Reachability/Introduction/Intro.html