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Fix panic where slice goes out of bounds because iface.Read returns less than zero (which might happen when the TUN/TAP interface is closed)

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Neil Alexander 2019-09-18 14:05:18 +01:00
parent 40204caab6
commit c3016e680c
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GPG Key ID: A02A2019A2BB0944
1 changed files with 1 additions and 1 deletions
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src/tuntap/iface.go
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@ -111,7 +111,7 @@ func (r *tunReader) _read() {
recvd := util.ResizeBytes(util.GetBytes(), 65535+tun_ETHER_HEADER_LENGTH) recvd := util.ResizeBytes(util.GetBytes(), 65535+tun_ETHER_HEADER_LENGTH)
// Wait for a packet to be delivered to us through the TUN/TAP adapter // Wait for a packet to be delivered to us through the TUN/TAP adapter
n, err := r.tun.iface.Read(recvd) n, err := r.tun.iface.Read(recvd)
if n == 0 { if n <= 0 {
util.PutBytes(recvd) util.PutBytes(recvd)
} else { } else {
r.tun.handlePacketFrom(r, recvd[:n], err) r.tun.handlePacketFrom(r, recvd[:n], err)