分配一个大小为负数的[]byte，导致OOM

[Ning-Qing]

https://github.com/FISCO-BCOS/go-sdk/blob/d1a8411d0e7600e2ece7c50c6da523ee52f32a45/conn/channel.go#L275

err := binary.Read(buf, binary.BigEndian, &result.length)
if err != nil {
	logrus.Println("binary.Read failed:", err)
}

请在这个位置进行检查或者返回