netdev - Re: [PATCH 4.14 4/4] netfilter: nf_conncount: fix garbage collection confirm race

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Date:   Wed, 2 Jan 2019 18:06:26 +0100
From:   Florian Westphal <fw@...len.de>
To:     Mauricio Faria de Oliveira <mfo@...onical.com>
Cc:     stable@...r.kernel.org, netdev@...r.kernel.org,
        Florian Westphal <fw@...len.de>,
        Alakesh Haloi <alakeshh@...zon.com>,
        nivedita.singhvi@...onical.com,
        Pablo Neira Ayuso <pablo@...filter.org>,
        Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>,
        "David S. Miller" <davem@...emloft.net>,
        Yi-Hung Wei <yihung.wei@...il.com>
Subject: Re: [PATCH 4.14 4/4] netfilter: nf_conncount: fix garbage collection
 confirm race

Mauricio Faria de Oliveira <mfo@...onical.com> wrote:
> +static const struct nf_conntrack_tuple_hash *
> +find_or_evict(struct net *net, struct xt_connlimit_conn *conn)
> +{
> +	const struct nf_conntrack_tuple_hash *found;
> +	unsigned long a, b;
> +	int cpu = raw_smp_processor_id();
> +	__s32 age;

This needs to be 'u32'.  Alternatively, also backport

4cd273bb91b3001f623 ("netfilter: nf_conncount: don't skip eviction when
age is negative").