panic: runtime error: index out of range [4280778753] with length 53330

goroutine 48 [running]:
compress/flate.(*compressor).findMatch(0xc0004ea020?, 0xcf50, 0xc000368000?, 0x6787aa?, 0x679f65?)
	/usr/local/go/src/compress/flate/deflate.go:256 +0x29c
compress/flate.(*compressor).deflate(0xc000580000)
	/usr/local/go/src/compress/flate/deflate.go:436 +0x19e
compress/flate.(*compressor).syncFlush(0xc000580000)
	/usr/local/go/src/compress/flate/deflate.go:558 +0x3b
compress/flate.(*Writer).Flush(...)
	/usr/local/go/src/compress/flate/deflate.go:725
github.com/google/syzkaller/pkg/rpctype.(*flateConn).Write(0xc000180a20, {0xc00066afe8?, 0xc0003c98d0?, 0xc0?})
	/syzkaller/gopath/src/github.com/google/syzkaller/pkg/rpctype/rpc.go:157 +0x45
bufio.(*Writer).Write(0xc000532940, {0xc00066a006?, 0x9c5465?, 0xc0000a9990?})
	/usr/local/go/src/bufio/bufio.go:679 +0xea
encoding/gob.(*Encoder).writeMessage(0xc0000a9900, {0xd23c80, 0xc000532940}, 0xc0000a9938)
	/usr/local/go/src/encoding/gob/encoder.go:82 +0x3bf
encoding/gob.(*Encoder).EncodeValue(0xc0000a9900, {0xa8c5a0?, 0xc000461e00?, 0x10?})
	/usr/local/go/src/encoding/gob/encoder.go:253 +0x448
encoding/gob.(*Encoder).Encode(0x9afe30d7eaa234ca?, {0xa8c5a0?, 0xc000461e00?})
	/usr/local/go/src/encoding/gob/encoder.go:176 +0x75
net/rpc.(*gobClientCodec).WriteRequest(0xc000180b10, 0xc000180b40?, {0xa8c5a0, 0xc000461e00})
	/usr/local/go/src/net/rpc/client.go:221 +0x53
net/rpc.(*Client).send(0xc00035a240, 0xc0004ad720)
	/usr/local/go/src/net/rpc/client.go:91 +0x224
net/rpc.(*Client).Go(0xc00035a240, {0xc1cd9d, 0x14}, {0xa8c5a0, 0xc000461e00}, {0xa8c5e0, 0xc0004ad6d0}, 0xc00035b3e0)
	/usr/local/go/src/net/rpc/client.go:315 +0x13a
net/rpc.(*Client).Call(...)
	/usr/local/go/src/net/rpc/client.go:321
github.com/google/syzkaller/pkg/rpctype.(*RPCClient).Call(0xaed580?, {0xc1cd9d, 0x14}, {0xa8c5a0, 0xc000461e00}, {0xa8c5e0, 0xc0004ad6d0})
	/syzkaller/gopath/src/github.com/google/syzkaller/pkg/rpctype/rpc.go:110 +0x165
main.(*FuzzerTool).exchangeDataCall(0xc000035970, {0xc00047bc20, 0x1, 0x1}, 0x3e7bbb0)
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:294 +0x216
main.(*FuzzerTool).exchangeDataWorker(0xc000035970)
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:334 +0x76
created by main.main in goroutine 1
	/syzkaller/gopath/src/github.com/google/syzkaller/syz-fuzzer/fuzzer.go:220 +0x13b2