From: Paolo Abeni <[email protected]>
Date: Mon, 5 Oct 2020 12:01:06 +0200
> Currently data fin on data packet are not handled properly:
> the 'rcv_data_fin_seq' field is interpreted as the last
> sequence number carrying a valid data, but for data fin
> packet with valid maps we currently store map_seq + map_len,
> that is, the next value.
>
> The 'write_seq' fields carries instead the value subseguent
> to the last valid byte, so in mptcp_write_data_fin() we
> never detect correctly the last DSS map.
>
> Fixes: 7279da6145bb ("mptcp: Use MPTCP-level flag for sending DATA_FIN")
> Fixes: 1a49b2c2a501 ("mptcp: Handle incoming 32-bit DATA_FIN values")
> Reviewed-by: Mat Martineau <[email protected]>
> Signed-off-by: Paolo Abeni <[email protected]>
Applied.
