linux-kernel - Re: [PATCH net] udp: disallow UFO for sockets with SO_NO

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Message-ID: <56939DDC.8030600@stressinduktion.org>
Date:	Mon, 11 Jan 2016 13:19:40 +0100
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	Michal Kubecek <mkubecek@...e.cz>,
	"David S. Miller" <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	"Nelson, Shannon" <shannon.nelson@...el.com>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	James Morris <jmorris@...ei.org>,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
	Patrick McHardy <kaber@...sh.net>
Subject: Re: [PATCH net] udp: disallow UFO for sockets with SO_NO_CHECK option

On 11.01.2016 07:50, Michal Kubecek wrote:
> Commit acf8dd0a9d0b ("udp: only allow UFO for packets from SOCK_DGRAM
> sockets") disallows UFO for packets sent from raw sockets. We need to do
> the same also for SOCK_DGRAM sockets with SO_NO_CHECK options, even if
> for a bit different reason: while such socket would override the
> CHECKSUM_PARTIAL set by ip_ufo_append_data(), gso_size is still set and
> bad offloading flags warning is triggered in __skb_gso_segment().
>
> In the IPv6 case, SO_NO_CHECK option is ignored but we need to disallow
> UFO for packets sent by sockets with UDP_NO_CHECK6_TX option.
>
> Signed-off-by: Michal Kubecek <mkubecek@...e.cz>
> Tested-by: Shannon Nelson <shannon.nelson@...el.com>

Acked-by: Hannes Frederic Sowa <hannes@...essinduktion.org>