linux-kernel - Re: [PATCH net v2] netfilter: br_netfilter: do not check confirmed bit in br_nf_local

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Message-ID: <20250822071330.4168f0db@kernel.org>
Date: Fri, 22 Aug 2025 07:13:30 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Florian Westphal <fw@...len.de>
Cc: Wang Liang <wangliang74@...wei.com>, pablo@...filter.org,
 kadlec@...filter.org, razor@...ckwall.org, idosch@...dia.com,
 davem@...emloft.net, edumazet@...gle.com, pabeni@...hat.com,
 horms@...nel.org, yuehaibing@...wei.com, zhangchangzhong@...wei.com,
 netfilter-devel@...r.kernel.org, coreteam@...filter.org,
 bridge@...ts.linux.dev, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH net v2] netfilter: br_netfilter: do not check confirmed
 bit in br_nf_local_in() after confirm

On Fri, 22 Aug 2025 09:50:58 +0200 Florian Westphal wrote:
> Wang Liang <wangliang74@...wei.com> wrote:
> > When send a broadcast packet to a tap device, which was added to a bridge,
> > br_nf_local_in() is called to confirm the conntrack. If another conntrack
> > with the same hash value is added to the hash table, which can be
> > triggered by a normal packet to a non-bridge device, the below warning
> > may happen.  
> 
> I placed this in nf.git:testing.

👍️

> In case netdev maintainers want to take it directly:

Unrelated, but while I have you -- nft_flowtable.sh is one of the most
flake-atious test for netdev CI currently :( Could you TAL whenever you
have some spare cycles?

https://netdev.bots.linux.dev/contest.html?test=nft-flowtable-sh