linux-kernel - Re: [PATCH] [v2] netfilter: fix NETFILTER_XT_TARGET

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Date:   Mon, 18 Mar 2019 16:22:39 +0100
From:   Pablo Neira Ayuso <pablo@...filter.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>,
        Florian Westphal <fw@...len.de>,
        "David S. Miller" <davem@...emloft.net>,
        Máté Eckl <ecklm94@...il.com>,
        Taehee Yoo <ap420073@...il.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Fernando Fernandez Mancera <ffmancera@...eup.net>,
        netfilter-devel@...r.kernel.org, coreteam@...filter.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [v2] netfilter: fix NETFILTER_XT_TARGET_TEE dependencies

On Wed, Mar 13, 2019 at 10:15:59PM +0100, 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, thanks Arnd.