netdev - Re: [PATCH net-next] mptcp: avoid potential infinite loop in mptcp

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Message-ID: <547dd077-bcfc-cf42-9278-e388b3af1ac8@linux.intel.com>
Date:   Wed, 2 Dec 2020 11:06:10 -0800 (PST)
From:   Mat Martineau <mathew.j.martineau@...ux.intel.com>
To:     Eric Dumazet <eric.dumazet@...il.com>
cc:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        netdev <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>
Subject: Re: [PATCH net-next] mptcp: avoid potential infinite loop in
 mptcp_recvmsg()

On Wed, 2 Dec 2020, Eric Dumazet wrote:

> From: Eric Dumazet <edumazet@...gle.com>
>
> If a packet is ready in receive queue, and application isssues
> a recvmsg()/recvfrom()/recvmmsg() request asking for zero bytes,
> we hang in mptcp_recvmsg().
>
> Fixes: ea4ca586b16f ("mptcp: refine MPTCP-level ack scheduling")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Cc: Paolo Abeni <pabeni@...hat.com>
> ---
> net/mptcp/protocol.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>

Thanks for catching this Eric.

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

--
Mat Martineau
Intel