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Date:   Mon, 03 Aug 2020 18:15:12 -0700 (PDT)
From:   David Miller <>
Subject: Re: [PATCH net] mptcp: fix bogus sendmsg() return code under

From: Paolo Abeni <>
Date: Mon,  3 Aug 2020 18:40:39 +0200

> In case of memory pressure, mptcp_sendmsg() may call
> sk_stream_wait_memory() after succesfully xmitting some
> bytes. If the latter fails we currently return to the
> user-space the error code, ignoring the succeful xmit.
> Address the issue always checking for the xmitted bytes
> before mptcp_sendmsg() completes.
> Fixes: f296234c98a8 ("mptcp: Add handling of incoming MP_JOIN requests")
> Reviewed-by: Matthieu Baerts <>
> Signed-off-by: Paolo Abeni <>

Applied and queued up for v5.7+ -stable, thank you.

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