diff --git a/client/highway.go b/client/highway.go
index 31739c6a..148e6c08 100644
--- a/client/highway.go
+++ b/client/highway.go
@@ -44,7 +44,6 @@ func (c *QQClient) highwayUploadImage(ip uint32, port int, updKey, img []byte, c
 	hl, _ := r.ReadInt32()
 	_, _ = r.ReadBytes(4)
 	payload, _ := r.ReadBytes(int(hl))
-	_ = conn.Close()
 	rsp := new(pb.RspDataHighwayHead)
 	if err = proto.Unmarshal(payload, rsp); err != nil {
 		return err
diff --git a/protocol/packets/global.go b/protocol/packets/global.go
index d7ab7648..1984c3a0 100644
--- a/protocol/packets/global.go
+++ b/protocol/packets/global.go
@@ -8,6 +8,7 @@ import (
 )
 
 var ErrUnknownFlag = errors.New("unknown flag")
+var ErrInvalidPayload = errors.New("invalid payload")
 var ErrDecryptFailed = errors.New("decrypt failed")
 
 type ISendingPacket interface {
@@ -83,6 +84,9 @@ func BuildSsoPacket(seq uint16, commandName, imei string, extData, outPacketSess
 }
 
 func ParseIncomingPacket(payload, d2key []byte) (*IncomingPacket, error) {
+	if len(payload) < 6 {
+		return nil, ErrInvalidPayload
+	}
 	reader := binary.NewReader(payload)
 	flag1 := reader.ReadInt32()
 	flag2 := reader.ReadByte()