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Date:   Thu, 15 Sep 2022 22:19:48 +0200
From:   Florian Westphal <>
To:     Tetsuo Handa <>
Cc:     Pablo Neira Ayuso <>,
        Jozsef Kadlecsik <>,
        Florian Westphal <>,
        syzbot <>,,,,
        Network Development <>
Subject: Re: [PATCH] netfilter: nf_tables: fix nft_counters_enabled underflow
 at nf_tables_addchain()

Tetsuo Handa <> wrote:
> syzbot is reporting underflow of nft_counters_enabled counter at
> nf_tables_addchain() [1], for commit 43eb8949cfdffa76 ("netfilter:
> nf_tables: do not leave chain stats enabled on error") missed that
> nf_tables_chain_destroy() after nft_basechain_init() in the error path of
> nf_tables_addchain() decrements the counter because nft_basechain_init()
> makes nft_is_base_chain() return true by setting NFT_CHAIN_BASE flag.
> Increment the counter immediately after returning from
> nft_basechain_init().

Applied, thanks.

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