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xtaci / kcp-go

A Crypto-Secure Reliable-UDP Library for golang with FEC
MIT License
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DATA RACE in xmitBuf sync.Pool #227

Closed darkterrorooo closed 2 years ago

darkterrorooo commented 2 years ago

when i use kcp to send data in In multiple instances， data race is happend.

WARNING: DATA RACE Write at 0x00c000ab9800 by goroutine 150: runtime.slicecopy() /usr/local/go/src/runtime/slice.go:284 +0x0 code.nextstorage.cn/storj/common/kcp.(*UDPSession).output() /Users/apple/work/storj/storj/common/kcp/sess.go:622 +0x51a code.nextstorage.cn/storj/common/kcp.newUDPSession.func1() /Users/apple/work/storj/storj/common/kcp/sess.go:185 +0x7d

Previous write at 0x00c000ab9800 by goroutine 82: runtime.slicecopy() /usr/local/go/src/runtime/slice.go:284 +0x0 code.nextstorage.cn/storj/common/kcp.(*UDPSession).output() /Users/apple/work/storj/storj/common/kcp/sess.go:622 +0x51a code.nextstorage.cn/storj/common/kcp.newUDPSession.func1()

sess.go 622 is

bts := xmitBuf.Get().([]byte)[:len(buf)] copy(bts, buf) // line 622 msg.Buffers = [][]byte{bts}