Commit 58cd405b authored by Paolo Abeni's avatar Paolo Abeni Committed by David S. Miller
Browse files

mptcp: keep snd_una updated for fallback socket 



After shutdown, for fallback MPTCP sockets, we always have

write_seq == snd_una+1

The above will foul OUTQ ioctl(). Keep snd_una in sync with
write_seq even after shutdown.

Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
Signed-off-by: default avatarMat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 26abf15c

net/mptcp/protocol.c

+1 −0
Original line number Diff line number Diff line
@@ -2666,6 +2666,7 @@ static void __mptcp_check_send_data_fin(struct sock *sk) 
	 * state now

	 */

	if (__mptcp_check_fallback(msk)) {

		WRITE_ONCE(msk->snd_una, msk->write_seq);

		if ((1 << sk->sk_state) & (TCPF_CLOSING | TCPF_LAST_ACK)) {

			inet_sk_state_store(sk, TCP_CLOSE);

			mptcp_close_wake_up(sk);