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Date:   Fri, 24 Apr 2020 11:24:33 -0700 (PDT)
From:   Mat Martineau <>
To:     Paolo Abeni <>
cc:, "David S. Miller" <>,
        Davide Caratti <>,
Subject: Re: [PATCH net] mptcp: fix race in msk status update

On Fri, 24 Apr 2020, Paolo Abeni wrote:

> Currently subflow_finish_connect() changes unconditionally
> any msk socket status other than TCP_ESTABLISHED.
> If an unblocking connect() races with close(), we can end-up
> triggering:
> IPv4: Attempt to release TCP socket in state 1 00000000e32b8b7e
> when the msk socket is disposed.
> Be sure to enter the established status only from SYN_SENT.
> Fixes: c3c123d16c0e ("net: mptcp: don't hang in mptcp_sendmsg() after TCP fallback")
> Signed-off-by: Paolo Abeni <>
> ---

Thanks Paolo, looks good.

Reviewed-by: Mat Martineau <>

Mat Martineau

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