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

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Message-ID: <20201202120637.1b6abbd5@kicinski-fedora-pc1c0hjn.DHCP.thefacebook.com>
Date:   Wed, 2 Dec 2020 12:06:37 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Eric Dumazet <eric.dumazet@...il.com>
Cc:     "David S . Miller" <davem@...emloft.net>,
        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 09:16:57 -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>

Applied, thanks!