sctp: listen on the sock only when it's state is listening or closed
authorXin Long <lucien.xin@gmail.com>
Thu, 6 Apr 2017 05:10:52 +0000 (13:10 +0800)
committerDavid S. Miller <davem@davemloft.net>
Thu, 6 Apr 2017 20:55:51 +0000 (13:55 -0700)
commit34b2789f1d9bf8dcca9b5cb553d076ca2cd898ee
treea85b3cd3e8a87fcc1ed9c5cdce8ce8facce83525
parent6c22fce07c97f765af1808ec3be007847e0b47d1
sctp: listen on the sock only when it's state is listening or closed

Now sctp doesn't check sock's state before listening on it. It could
even cause changing a sock with any state to become a listening sock
when doing sctp_listen.

This patch is to fix it by checking sock's state in sctp_listen, so
that it will listen on the sock with right state.

Reported-by: Andrey Konovalov <andreyknvl@google.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/sctp/socket.c