netdev - Re: [PATCH net-next] sunvnet: don't change gso data on clones

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Message-ID: <1423662993.4847.19.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Wed, 11 Feb 2015 05:56:33 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David L Stevens <david.stevens@...cle.com>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH net-next] sunvnet: don't change gso data on clones

On Wed, 2015-02-11 at 08:20 -0500, David L Stevens wrote:
> This patch unclones an skb for the case where the sunvnet driver needs to
> change the segmentation size so that it doesn't interfere with TCP SACK's
> use of them.
> 
> Signed-off-by: David L Stevens <david.stevens@...cle.com>
> ---

Hmm... this would point to a TCP bug ?

What happens if not GSO is needed, TCP corrupts data currently
read/processed by NIC/driver ?

TCP should have required skb_unclone() where needed.


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