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Date:   Fri, 17 Feb 2023 15:14:24 +0100
From:   Greg KH <gregkh@linuxfoundation.org>
To:     Qingfang DENG <dqfext@gmail.com>
Cc:     stable@vger.kernel.org, Florian Westphal <fw@strlen.de>,
        Shell Chen <xierch@gmail.com>
Subject: Re: [PATCH 5.15,5.10,5.4,4.19] netfilter: nft_tproxy: restrict to
 prerouting hook
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On Thu, Feb 16, 2023 at 08:47:55PM +0800, Qingfang DENG wrote:
> From: Florian Westphal <fw@strlen.de>
> 
> commit 18bbc3213383a82b05383827f4b1b882e3f0a5a5 upstream.
> 
> TPROXY is only allowed from prerouting, but nft_tproxy doesn't check this.
> This fixes a crash (null dereference) when using tproxy from e.g. output.
> 
> Fixes: 4ed8eb6570a4 ("netfilter: nf_tables: Add native tproxy support")
> Reported-by: Shell Chen <xierch@gmail.com>
> Signed-off-by: Florian Westphal <fw@strlen.de>
> Signed-off-by: Qingfang DENG <dqfext@gmail.com>
> ---
>  net/netfilter/nft_tproxy.c | 8 ++++++++
>  1 file changed, 8 insertions(+)

Now queued up, thanks.

greg k-h