From: Florian Westphal <fw@strlen.de>
To: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: Ren Wei <n05ec@lzu.edu.cn>,
netfilter-devel@vger.kernel.org, phil@nwl.cc,
yuantan098@gmail.com, yifanwucs@gmail.com,
tomapufckgml@gmail.com, zcliangcn@gmail.com, bird@lzu.edu.cn,
bronzed_45_vested@icloud.com
Subject: Re: [PATCH nf 1/1] netfilter: xt_nat: reject unsupported target families
Date: Mon, 15 Jun 2026 20:16:06 +0200 [thread overview]
Message-ID: <ajBBZgEBh64u0m-G@strlen.de> (raw)
In-Reply-To: <ai6Ncagz3tfhFTAS@strlen.de>
Florian Westphal <fw@strlen.de> wrote:
> > > This is wnat ebtables.c already does which is why this poc would
> > > not work for classic xtables.
> >
> > Do you refer to targets specifically, correct?
> >
> > /* Reject UNSPEC, xtables verdicts/return values are incompatible */
> > if (target->family != NFPROTO_BRIDGE) {
> > module_put(target->me);
> > ret = -ENOENT;
> > goto cleanup_watchers;
> > }
>
> yes.
I just submittted:
https://patchwork.ozlabs.org/project/netfilter-devel/patch/20260615181044.4049-1-fw@strlen.de/
which extends the original ebtables fix to nft_compat.
I consider this an additional fix, it does not replace/supersede this
patch.
prev parent reply other threads:[~2026-06-15 18:16 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-13 10:27 [PATCH nf 0/1] netfilter: xt_nat: bridge nft_compat rule can trigger NULL-deref Ren Wei
2026-06-13 10:27 ` [PATCH nf 1/1] netfilter: xt_nat: reject unsupported target families Ren Wei
2026-06-13 21:31 ` Florian Westphal
2026-06-13 22:00 ` Florian Westphal
2026-06-13 22:15 ` Pablo Neira Ayuso
2026-06-13 22:25 ` Florian Westphal
2026-06-14 9:43 ` Pablo Neira Ayuso
2026-06-14 11:11 ` Pablo Neira Ayuso
2026-06-14 11:16 ` Florian Westphal
2026-06-15 18:16 ` Florian Westphal [this message]
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