From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcelo Ricardo Leitner Date: Thu, 06 Apr 2017 13:02:19 +0000 Subject: Re: [PATCH net] sctp: listen on the sock only when it's state is listening or closed Message-Id: <20170406130219.GF911@localhost.localdomain> List-Id: References: <19f73778f8e27b05ee9aa25ece57db6b0e73d197.1491455452.git.lucien.xin@gmail.com> In-Reply-To: <19f73778f8e27b05ee9aa25ece57db6b0e73d197.1491455452.git.lucien.xin@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Xin Long Cc: network dev , linux-sctp@vger.kernel.org, davem@davemloft.net, Neil Horman , andreyknvl@google.com On Thu, Apr 06, 2017 at 01:10:52PM +0800, Xin Long wrote: > 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 > Tested-by: Andrey Konovalov > Signed-off-by: Xin Long Acked-by: Marcelo Ricardo Leitner Dave, please consider this for -stable. Thanks > --- > net/sctp/socket.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/net/sctp/socket.c b/net/sctp/socket.c > index c1401f4..d9d4c92 100644 > --- a/net/sctp/socket.c > +++ b/net/sctp/socket.c > @@ -7034,6 +7034,9 @@ int sctp_inet_listen(struct socket *sock, int backlog) > if (sock->state != SS_UNCONNECTED) > goto out; > > + if (!sctp_sstate(sk, LISTENING) && !sctp_sstate(sk, CLOSED)) > + goto out; > + > /* If backlog is zero, disable listening. */ > if (!backlog) { > if (sctp_sstate(sk, CLOSED)) > -- > 2.1.0 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-sctp" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >