sctp: reinit stream if stream outcnt has been change by sinit in sendmsg
authorXin Long <lucien.xin@gmail.com>
Mon, 15 Jan 2018 09:01:19 +0000 (17:01 +0800)
committerDavid S. Miller <davem@davemloft.net>
Tue, 16 Jan 2018 19:20:21 +0000 (14:20 -0500)
commit625637bf4afa45204bd87e4218645182a919485a
treedb09646b9a83e5737ccd1932472145964472f2db
parent3d1661304f0b2b51a8a43785b764822611dbdd53
sctp: reinit stream if stream outcnt has been change by sinit in sendmsg

After introducing sctp_stream structure, sctp uses stream->outcnt as the
out stream nums instead of c.sinit_num_ostreams.

However when users use sinit in cmsg, it only updates c.sinit_num_ostreams
in sctp_sendmsg. At that moment, stream->outcnt is still using previous
value. If it's value is not updated, the sinit_num_ostreams of sinit could
not really work.

This patch is to fix it by updating stream->outcnt and reiniting stream
if stream outcnt has been change by sinit in sendmsg.

Fixes: a83863174a61 ("sctp: prepare asoc stream for stream reconf")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/sctp/socket.c