linux-kernel - Re: [PATCH] ipv6: Initialize ip6_tnl.hlen in gre tunnel even if no route is found

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Date:	Fri, 11 Oct 2013 17:02:17 +0200
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	Oussama Ghorbel <ou.ghorbel@...il.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	James Morris <jmorris@...ei.org>,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
	Patrick McHardy <kaber@...sh.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ipv6: Initialize ip6_tnl.hlen in gre tunnel even if no route is found

On Thu, Oct 10, 2013 at 06:50:27PM +0100, Oussama Ghorbel wrote:
> The ip6_tnl.hlen (gre and ipv6 headers length) is independent from the
> outgoing interface, so it would be better to initialize it even when no
> route is found, otherwise its value will be zero.
> While I'm not sure if this could happen in real life, but doing that
> will avoid to call the skb_push function with a zero in ip6gre_header
> function.
> 
> Suggested-by: Hannes Frederic Sowa <hannes@...essinduktion.org>
> Signed-off-by: Oussama Ghorbel <ou.ghorbel@...il.com>

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

Thanks,

  Hannes

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