sctp: listen on the sock only when it's state is listening or closed

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[ Upstream commit 34b2789f1d ]

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Xin Long 2017-04-06 13:10:52 +08:00 • committed by Greg Kroah-Hartman

parent dbaaa5890d

commit 02f0430967

1 changed files with 3 additions and 0 deletions

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net/sctp/socket.c

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