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Date:   Wed, 17 Jun 2020 11:14:28 -0700 (PDT)
From:   Mat Martineau <mathew.j.martineau@...ux.intel.com>
To:     Paolo Abeni <pabeni@...hat.com>
cc:     netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, mptcp@...ts.01.org
Subject: Re: [MPTCP] [PATCH net 2/2] mptcp: drop MP_JOIN request sock on syn
 cookies

On Wed, 17 Jun 2020, Paolo Abeni wrote:

> Currently any MPTCP socket using syn cookies will fallback to
> TCP at 3rd ack time. In case of MP_JOIN requests, the RFC mandate
> closing the child and sockets, but the existing error paths
> do not handle the syncookie scenario correctly.
>
> Address the issue always forcing the child shutdown in case of
> MP_JOIN fallback.
>
> Fixes: ae2dd7164943 ("mptcp: handle tcp fallback when using syn cookies")
> Signed-off-by: Paolo Abeni <pabeni@...hat.com>
> ---
> net/mptcp/subflow.c | 18 ++++++++++--------
> 1 file changed, 10 insertions(+), 8 deletions(-)

Reviewed-by: Mat Martineau <mathew.j.martineau@...ux.intel.com>

--
Mat Martineau
Intel

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