Re: [PATCH nf] netfilter: x_tables: set module owner for builtin matches/targets

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Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx> wrote:
> On Wed, Jul 04, 2018 at 07:52:18PM +0200, Florian Westphal wrote:
> > Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx> wrote:
> > > On Wed, Jul 04, 2018 at 07:39:54PM +0200, Pablo Neira Ayuso wrote:
> > > > On Thu, Jun 28, 2018 at 05:55:49PM +0200, Florian Westphal wrote:
> > > > > nft_compat relies on xt_request_find_match/target to increment
> > > > > refcount of the module that provides the match/target.
> > > > > 
> > > > > The builtin modules/targets currently did't set the module owner so it
> > > > > was possible to rmmod ip(6)tables while extensions were still in use.
> > > > 
> > > > Applied, thanks.
> > > 
> > > Oh, wait this one too.
> > > 
> > > The following are not supported by nft_compat:
> > > 
> > > * ebt_standard_target
> > > * ipt_builtin_tg
> > > * ip6t_builtin_tg
> > > 
> > > So I think we only need it for icmp and icmpv6.
> > 
> > Hmm, how is that not supported?
> 
> We use native.

Ok, so userspace doesn't generate request to use them at the moment.

> > I don't see anything that prevents their use.
> > Can you elaborate?
> 
> We don't use standard targets from nft_compat, we use native immediate
> to express the verdict / jumps and so on.

Alright, but that means its either this patch or a different patch
that explicitly rejects them from nft_compat, right?
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