#vulnerable code 
                                static void secureLocalSocket(String authSocket, long handle) throws IOException {
        String os = System.getProperty("os.name").toLowerCase();
        if (os.indexOf("windows") < 0) {
            File file = new File(authSocket);
            if (!file.setReadable(false, false) || !file.setReadable(true, true)
                    || !file.setExecutable(false, false) || !file.setExecutable(true, true)) {
                throw new IOException("Unable to secure local socket");
            }

        } else {
            // should be ok on windows
        }
    } 
                            #location 2 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                static void secureLocalSocket(String authSocket, long handle) throws IOException {
        if (OsUtils.isUNIX()) {
            File file = new File(authSocket);
            if (!file.setReadable(false, false) || !file.setReadable(true, true)
                    || !file.setExecutable(false, false) || !file.setExecutable(true, true)) {
                throw new IOException("Unable to secure local socket");
            }

        } else {
            // should be ok on windows
        }
    }