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Date: Tue, 29 Jul 2025 01:47:52 +0200
From: Florian Westphal <fw@strlen.de>
To: Dan Moulding <dan@danm.net>
Cc: netfilter-devel@vger.kernel.org, pablo@netfilter.org,
	regressions@lists.linux.dev
Subject: Re: [REGRESSION] v6.16 system hangs (bisected to nf_conntrack fix)
Message-ID: <aIgMKCuhag2snagZ@strlen.de>
References: <20250728232506.7170-1-dan@danm.net>
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In-Reply-To: <20250728232506.7170-1-dan@danm.net>

Dan Moulding <dan@danm.net> wrote:
> Hello netfilter folks,
> 
> Since v6.16-rc7 I've been hitting a vexing system hang (no kernel
> panic is being produced that I can see). I did not have this problem
> when running rc6. I first noticed it the morning after upgrading to
> rc7. I found the machine unresponsive. Checking logs after restarting
> it, I could see it had been in the middle of being backed up by an
> rsync-based backup system. This same sequence repeated the following
> day.

Bah.  Can't see the problem.  Can you partial-revert and see what
happens?

E.g. only revert the changes to net/netfilter/nf_conntrack_core.c
and keep nf_ct_resolve_clash_harder().

Is this x86?