From: Florian Westphal <fw@strlen.de>
To: Corubba Smith <corubba@gmx.de>
Cc: Florian Westphal <fw@strlen.de>, netfilter-devel@vger.kernel.org
Subject: Re: [PATCH ulogd2] nfct: fix counter-reset without hashtable
Date: Tue, 25 Mar 2025 11:35:48 +0100 [thread overview]
Message-ID: <20250325103548.GC4481@breakpoint.cc> (raw)
In-Reply-To: <fb5de8d9-f106-4352-907a-461f3323ac88@gmx.de>
Corubba Smith <corubba@gmx.de> wrote:
> On 3/25/25 06:56, Florian Westphal wrote:
> > Corubba Smith <corubba@gmx.de> wrote:
> >> The dump_reset_handler will try to update the hashtable regardless of
> >> whether it is used (and thus initialized), which results in a segfault
> >> if it isn't. Instead just short-circuit the handler, and skip any
> >> further result processing because it's not used in this case anyway.
> >> All flow counters in conntrack are reset regardless of the return value
> >> of the handler/callback.
> >
> > How can this happen?
> > constructor_nfct (->start()) will return an error if ct_active table
> > cannot be allocated/is disabled?
> >
>
> In event mode the hashtable is optional, and sending SIGUSR2 to ulogd will
> call get_ctr_zero().
Thanks, applied the patch with above sentence included in the commit
message.
prev parent reply other threads:[~2025-03-25 10:35 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-25 0:24 [PATCH ulogd2] nfct: fix counter-reset without hashtable Corubba Smith
2025-03-25 5:56 ` Florian Westphal
2025-03-25 9:20 ` Corubba Smith
2025-03-25 10:35 ` Florian Westphal [this message]
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