linux-kernel - Re: [PATCH v3 1/1] netfilter: nat: add a range check for l3/l4 protonum

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Date:   Fri, 28 Aug 2020 18:45:51 +0200
From:   Florian Westphal <fw@...len.de>
To:     Pablo Neira Ayuso <pablo@...filter.org>
Cc:     Will McVicker <willmcvicker@...gle.com>, stable@...r.kernel.org,
        Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>,
        Florian Westphal <fw@...len.de>,
        "David S. Miller" <davem@...emloft.net>,
        Alexey Kuznetsov <kuznet@....inr.ac.ru>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        netfilter-devel@...r.kernel.org, coreteam@...filter.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-team@...roid.com
Subject: Re: [PATCH v3 1/1] netfilter: nat: add a range check for l3/l4
 protonum

Pablo Neira Ayuso <pablo@...filter.org> wrote:
> Hi Will,
> 
> Given this is for -stable maintainers only, I'd suggest:
> 
> 1) Specify what -stable kernel versions this patch applies to.
>    Explain that this problem is gone since what kernel version.
> 
> 2) Maybe clarify that this is only for stable in the patch subject,
>    e.g. [PATCH -stable v3] netfilter: nat: add a range check for l3/l4

Hmm, we silently accept a tuple that we can't really deal with, no?

> > +	if (l3num != NFPROTO_IPV4 && l3num != NFPROTO_IPV6)
> > +		return -EOPNOTSUPP;

I vote to apply this to nf.git