From mboxrd@z Thu Jan  1 00:00:00 1970
From: Florian Westphal <fw@strlen.de>
Subject: Re: [PATCH net] netfilter: nat: cope with negative port range
Date: Tue, 13 Feb 2018 18:02:17 +0100
Message-ID: <20180213170217.GA2810@breakpoint.cc>
References: <9f25396653751c2d8130d7a1cbb62ae90969f37f.1518533214.git.pabeni@redhat.com>
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Cc: netdev@vger.kernel.org, Pablo Neira Ayuso <pablo@netfilter.org>,
        Florian Westphal <fw@strlen.de>,
        "David S. Miller" <davem@davemloft.net>,
        netfilter-devel@vger.kernel.org, syzkaller-bugs@googlegroups.com
To: Paolo Abeni <pabeni@redhat.com>
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Paolo Abeni <pabeni@redhat.com> wrote:
> Fixes: c7232c9979cb ("netfilter: add protocol independent NAT core")

are you sure?
When I looked this was a day 0 bug, the code was just moved from ipv4.