Re: [PATCH v4 1/2] netfilter: Terminate rule eval if protocol=IPv6 and ipv6 module is disabled

Florian Westphal
2019-09-03T19:48:18Z

Pablo Neira Ayuso <pablo@netfilter.org> wrote:
> > > I was expecting we could find a way to handle this from br_netfilter
> > > alone itself.
> >
> > We can't because we support ipv6 fib lookups from the netdev family
> > as well.
> >
> > Alternative is to auto-accept ipv6 packets from the nf_tables eval loop,
> > but I think its worse.
>
> Could we add a restriction for nf_tables + br_netfilter + !ipv6. I
> mean, if this is an IPv6 packet, nf_tables is on and IPv6 module if
> off, then drop this packet?

We could do that from nft_do_chain_netdev().