netdev - Re: [PATCH v3] sit: Fix ipip6_tunnel_lookup device matching criteria

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Date:	Thu, 14 Aug 2014 14:40:10 -0700 (PDT)
From:	David Miller <davem@...hat.com>
To:	shmulik.ladkani@...il.com
Cc:	netdev@...r.kernel.org, sergei.shtylyov@...entembedded.com,
	contact@...chahlusiak.de, nicolas.dichtel@...nd.com
Subject: Re: [PATCH v3] sit: Fix ipip6_tunnel_lookup device matching
 criteria

From: Shmulik Ladkani <shmulik.ladkani@...il.com>
Date: Thu, 14 Aug 2014 15:27:20 +0300

> As of 4fddbf5d78 ("sit: strictly restrict incoming traffic to tunnel link device"),
> when looking up a tunnel, tunnel's underlying interface (t->parms.link)
> is verified to match incoming traffic's ingress device.
> 
> However the comparison was incorrectly based on skb->dev->iflink.
> 
> Instead, dev->ifindex should be used, which correctly represents the
> interface from which the IP stack hands the ipip6 packets.
> 
> This allows setting up sit tunnels bound to vlan interfaces (otherwise
> incoming ipip6 traffic on the vlan interface was dropped due to
> ipip6_tunnel_lookup match failure).
> 
> Signed-off-by: Shmulik Ladkani <shmulik.ladkani@...il.com>
> Acked-by: Nicolas Dichtel <nicolas.dichtel@...nd.com>

Applied.
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