Re: [PATCH net-next] netfilter: fix NETFILTER_XT_TARGET_TEE dependencies

[Pablo Neira Ayuso]

On Fri, Jul 06, 2018 at 03:05:13PM +0200, Arnd Bergmann wrote:
> On Fri, Jul 6, 2018 at 2:48 PM, Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx> wrote:
> > On Fri, Jul 06, 2018 at 02:45:42PM +0200, Pablo Neira Ayuso wrote:
> >> On Fri, Jul 06, 2018 at 02:37:58PM +0200, Arnd Bergmann wrote:
> >> > With NETFILTER_XT_TARGET_TEE=y and IP6_NF_IPTABLES=m, we get a link
> >> > error when referencing the NF_DUP_IPV6 module:
> >> >
> >> > net/netfilter/xt_TEE.o: In function `tee_tg6':
> >> > xt_TEE.c:(.text+0x14): undefined reference to `nf_dup_ipv6'
> >> >
> >> > The problem here is the 'select NF_DUP_IPV6 if IP6_NF_IPTABLES'
> >> > that forces NF_DUP_IPV6 to be =m as well rather than setting it
> >> > to =y as was intended here. Adding a soft dependency on
> >> > IP6_NF_IPTABLES avoids that broken configuration.
> >>
> >> Applied to nf.git, thanks Arnd.
> >
> > Sorry, let me reconsider.
> >
> > We many need similar patches to other spots in 35bf1ccecaaa ?
> >
> > If so, it would be good to fix in the one go.
> 
> I'm fairly sure that  NETFILTER_XT_TARGET_LOG is safe, since
> NF_LOG_IPV6 already depends on IP6_NF_IPTABLES.
> 
> NF_SOCKET_IPV6 like NF_DUP_IPV6 does not depend on
> IP6_NF_IPTABLES, so we may have a similar problem there, though
> I have not come across that. I have done only a few hundred randconfig
> builds since I started yesterday, so I may have missed something,
> but I think this is safe because CONFIG_NF_SOCKET_IPV6 is
> used like a 'bool' symbol these days, we don't actually control building
> a module with it, only a small portion in the nft_socket file.

Thanks for explaining.

Applied, thanks!