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

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Message-ID: <c68ff2ed5dd3292c4cf6e5f60d2b39d0f29be2ae.camel@redhat.com>
Date:   Wed, 02 Dec 2020 18:38:36 +0100
From:   Paolo Abeni <pabeni@...hat.com>
To:     Eric Dumazet <eric.dumazet@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev <netdev@...r.kernel.org>, Eric Dumazet <edumazet@...gle.com>
Subject: Re: [PATCH net-next] mptcp: avoid potential infinite loop in
 mptcp_recvmsg()

On Wed, 2020-12-02 at 09:16 -0800, 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>

Tested-by: Paolo Abeni <pabeni@...hat.com>

Thanks Eric!