netdev - Re: [PATCH 0/4] Prevent UDP tunnels from operating on garbage socket

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Date:	Wed, 08 Apr 2015 16:03:03 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	hannes@...essinduktion.org
Cc:	tom@...bertland.com, netdev@...r.kernel.org,
	netfilter-devel@...r.kernel.org, pablo@...filter.org,
	jiri@...nulli.us
Subject: Re: [PATCH 0/4] Prevent UDP tunnels from operating on garbage
 socket

From: Hannes Frederic Sowa <hannes@...essinduktion.org>
Date: Tue, 07 Apr 2015 13:27:33 +0200

> Also, I saw one inconsistency with sk_bound_dev_if in netfilter which
> doesn't get solved by this patchset (it uses skb->sk->sk_bound_dev_if
> unconditionally).

I looked at this quickly, and it'll take a bit of (mechanical) work to
resolve.  Basically you have to get the socket down to ip_route_me_harder()
and sometimes that code path is coming from that XT targets, which don't
take the nf_hook_state as an argument or anything like that (yet).
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