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p2p/discv5: fix idx can be negative after uint convert to int(can cause crash)

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tony 2018-07-30 15:04:45 +08:00
parent 93c0f1715d
commit 2dc0ae743b
1 changed files with 1 additions and 1 deletions
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2
p2p/discv5/net.go
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@ -1228,7 +1228,7 @@ func (net *Network) checkTopicRegister(data *topicRegister) (*pong, error) {
if rlpHash(data.Topics) != pongpkt.data.(*pong).TopicHash {
return nil, errors.New("topic hash mismatch")
}
if data.Idx < 0 || int(data.Idx) >= len(data.Topics) {
if int(data.Idx) < 0 || int(data.Idx) >= len(data.Topics) {
return nil, errors.New("topic index out of range")
}
return pongpkt.data.(*pong), nil