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Date: Thu, 15 Sep 2022 22:19:48 +0200 From: Florian Westphal <fw@...len.de> To: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp> Cc: Pablo Neira Ayuso <pablo@...filter.org>, Jozsef Kadlecsik <kadlec@...filter.org>, Florian Westphal <fw@...len.de>, syzbot <syzbot+b5d82a651b71cd8a75ab@...kaller.appspotmail.com>, syzkaller-bugs@...glegroups.com, netfilter-devel@...r.kernel.org, coreteam@...filter.org, Network Development <netdev@...r.kernel.org> Subject: Re: [PATCH] netfilter: nf_tables: fix nft_counters_enabled underflow at nf_tables_addchain() Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp> 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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