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connection: fix svacer issue #361

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merged 1 commit into from
Dec 5, 2023
Merged

connection: fix svacer issue #361

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17 changes: 11 additions & 6 deletions connection.go
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Original file line number Diff line number Diff line change
Expand Up @@ -1158,7 +1158,7 @@ func (conn *Connection) timeouts() {
}

func read(r io.Reader, lenbuf []byte) (response []byte, err error) {
var length int
var length uint64

if _, err = io.ReadFull(r, lenbuf); err != nil {
return
Expand All @@ -1167,15 +1167,20 @@ func read(r io.Reader, lenbuf []byte) (response []byte, err error) {
err = errors.New("wrong response header")
return
}
length = (int(lenbuf[1]) << 24) +
(int(lenbuf[2]) << 16) +
(int(lenbuf[3]) << 8) +
int(lenbuf[4])
length = (uint64(lenbuf[1]) << 24) +
(uint64(lenbuf[2]) << 16) +
(uint64(lenbuf[3]) << 8) +
uint64(lenbuf[4])

if length == 0 {
switch {
case length == 0:
err = errors.New("response should not be 0 length")
return
case length > math.MaxUint32:
err = errors.New("response is too big")
return
}

response = make([]byte, length)
_, err = io.ReadFull(r, response)

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