netdev - Re: [PATCH net-next] net: mptcp: don't hang in mptcp

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Message-Id: <20200323.205334.1556861946836251963.davem@davemloft.net>
Date:   Mon, 23 Mar 2020 20:53:34 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     dcaratti@...hat.com
Cc:     mathew.j.martineau@...ux.intel.com, matthieu.baerts@...sares.net,
        pabeni@...hat.com, kuba@...nel.org, netdev@...r.kernel.org,
        mptcp@...ts.01.org
Subject: Re: [PATCH net-next] net: mptcp: don't hang in mptcp_sendmsg()
 after TCP fallback

From: Davide Caratti <dcaratti@...hat.com>
Date: Thu, 19 Mar 2020 22:45:37 +0100

> it's still possible for packetdrill to hang in mptcp_sendmsg(), when the
> MPTCP socket falls back to regular TCP (e.g. after receiving unsupported
> flags/version during the three-way handshake). Adjust MPTCP socket state
> earlier, to ensure correct functionality of mptcp_sendmsg() even in case
> of TCP fallback.
> 
> Fixes: 767d3ded5fb8 ("net: mptcp: don't hang before sending 'MP capable with data'")
> Fixes: 1954b86016cf ("mptcp: Check connection state before attempting send")
> Signed-off-by: Davide Caratti <dcaratti@...hat.com>

APplied.