sctp: fix ignoring asoc_id for tcp-style sockets on SCTP_DEFAULT_SNDINFO sockopt

A similar fix as Patch "sctp: fix ignoring asoc_id for tcp-style sockets on
SCTP_DEFAULT_SEND_PARAM sockopt" on SCTP_DEFAULT_SNDINFO sockopt.

Fixes: 92fc3bd9 ("sctp: use SCTP_FUTURE_ASSOC and add SCTP_CURRENT_ASSOC for SCTP_DEFAULT_SNDINFO sockopt")
Signed-off-by: NXin Long <lucien.xin@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/sctp/socket.c

@@ -3087,6 +3087,9 @@ static int sctp_setsockopt_default_sndinfo(struct sock *sk,
 		return 0;
 	}
 
+	if (sctp_style(sk, TCP))
+		info.snd_assoc_id = SCTP_FUTURE_ASSOC;
+
 	if (info.snd_assoc_id == SCTP_FUTURE_ASSOC ||
 	    info.snd_assoc_id == SCTP_ALL_ASSOC) {
 		sp->default_stream = info.snd_sid;