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Date:   Thu, 29 Aug 2019 22:29:57 +0200
From:   Florian Westphal <fw@strlen.de>
To:     Leonardo Bras <leonardo@linux.ibm.com>
Cc:     Pablo Neira Ayuso <pablo@netfilter.org>,
        Florian Westphal <fw@strlen.de>,
        "David S. Miller" <davem@davemloft.net>,
        netfilter-devel@vger.kernel.org, coreteam@netfilter.org,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        Jozsef Kadlecsik <kadlec@netfilter.org>,
        Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
        Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Subject: Re: [PATCH v2 1/1] netfilter: nf_tables: fib: Drop IPV6 packages if
 IPv6 is disabled on boot
Message-ID: <20190829202957.GL20113@breakpoint.cc>
References: <20190821141505.2394-1-leonardo@linux.ibm.com>
 <db0f02c5b1a995fde174f036540a3d11008cf116.camel@linux.ibm.com>
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Leonardo Bras <leonardo@linux.ibm.com> wrote:
> > Thats a good point -- Leonardo, is the
> > "net.bridge.bridge-nf-call-ip6tables" sysctl on?
> 
> Running
> # sudo sysctl -a
> I can see:
> net.bridge.bridge-nf-call-ip6tables = 1
>  
> So this packets are sent to host iptables for processing?

Yes, this is an hold hack that was made because ebtables is
very feature-limited.

However, as I mentioned before I don't think there is anything
we can do here except audit all affected nft expressions and ip6tables
matches and add this check where needed.  ip6t_rpfilter.c comes to mind.

In any case your patch looks ok to me.

> (Sorry for the delay, I did not received the previous e-mails.
> Please include me in to/cc.)

Sorry about that.