netdev - Re: [PATCH net-net] netfilter: conntrack: nf_conncount

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Date:   Mon, 7 Sep 2020 12:19:36 +0200
From:   Simon Horman <simon.horman@...ronome.com>
To:     Eelco Chaudron <echaudro@...hat.com>
Cc:     Pablo Neira Ayuso <pablo@...filter.org>, netdev@...r.kernel.org,
        netfilter-devel@...r.kernel.org
Subject: Re: [PATCH net-net] netfilter: conntrack: nf_conncount_init is
 failing with IPv6 disabled

+ Pablo, netfilter-devel@...r.kernel.org

On Tue, Sep 01, 2020 at 04:56:02PM +0200, Eelco Chaudron wrote:
> The openvswitch module fails initialization when used in a kernel
> without IPv6 enabled. nf_conncount_init() fails because the ct code
> unconditionally tries to initialize the netns IPv6 related bit,
> regardless of the build option. The change below ignores the IPv6
> part if not enabled.
> 
> Note that the corresponding _put() function already has this IPv6
> configuration check.
> 
> Fixes: 11efd5cb04a1 ("openvswitch: Support conntrack zone limit")
> Signed-off-by: Eelco Chaudron <echaudro@...hat.com>

Reviewed-by: Simon Horman <simon.horman@...ronome.com>

> ---
>  net/netfilter/nf_conntrack_proto.c |    2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/net/netfilter/nf_conntrack_proto.c b/net/netfilter/nf_conntrack_proto.c
> index 95f79980348c..47e9319d2cf3 100644
> --- a/net/netfilter/nf_conntrack_proto.c
> +++ b/net/netfilter/nf_conntrack_proto.c
> @@ -565,6 +565,7 @@ static int nf_ct_netns_inet_get(struct net *net)
>  	int err;
>  
>  	err = nf_ct_netns_do_get(net, NFPROTO_IPV4);
> +#if IS_ENABLED(CONFIG_IPV6)
>  	if (err < 0)
>  		goto err1;
>  	err = nf_ct_netns_do_get(net, NFPROTO_IPV6);
> @@ -575,6 +576,7 @@ static int nf_ct_netns_inet_get(struct net *net)
>  err2:
>  	nf_ct_netns_put(net, NFPROTO_IPV4);
>  err1:
> +#endif
>  	return err;
>  }
>  
>