netdev - Re: [PATCH net v2] ipv6: Remove dependency of ipv6_frag_thdr

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Date:   Thu, 19 Nov 2020 14:32:39 +0100
From:   Pablo Neira Ayuso <pablo@...filter.org>
To:     Georg Kohmann <geokohma@...co.com>
Cc:     netdev@...r.kernel.org, kadlec@...filter.org, fw@...len.de,
        davem@...emloft.net, kuznet@....inr.ac.ru, yoshfuji@...ux-ipv6.org,
        kuba@...nel.org, netfilter-devel@...r.kernel.org,
        coreteam@...filter.org, rdunlap@...radead.org
Subject: Re: [PATCH net v2] ipv6: Remove dependency of
 ipv6_frag_thdr_truncated on ipv6 module

On Thu, Nov 19, 2020 at 10:58:33AM +0100, Georg Kohmann wrote:
> IPV6=m
> NF_DEFRAG_IPV6=y
> 
> ld: net/ipv6/netfilter/nf_conntrack_reasm.o: in function
> `nf_ct_frag6_gather':
> net/ipv6/netfilter/nf_conntrack_reasm.c:462: undefined reference to
> `ipv6_frag_thdr_truncated'
> 
> Netfilter is depending on ipv6 symbol ipv6_frag_thdr_truncated. This
> dependency is forcing IPV6=y.
> 
> Remove this dependency by moving ipv6_frag_thdr_truncated out of ipv6. This
> is the same solution as used with a similar issues: Referring to
> commit 70b095c843266 ("ipv6: remove dependency of nf_defrag_ipv6 on ipv6
> module")
> 
> Fixes: 9d9e937b1c8b ("ipv6/netfilter: Discard first fragment not including all headers")
> Reported-by: Randy Dunlap <rdunlap@...radead.org>
> Reported-by: kernel test robot <lkp@...el.com>
> Signed-off-by: Georg Kohmann <geokohma@...co.com>

Acked-by: Pablo Neira Ayuso <pablo@...filter.org>

Thanks.