From: Florian Westphal <fw@strlen.de>
To: Bruno de Paula Larini <bruno.larini@riosoft.com.br>
Cc: "netfilter@vger.kernel.org" <netfilter@vger.kernel.org>
Subject: Re: BUG: soft lockup on kernel 5.19.9 when attempting FTP connections
Date: Tue, 20 Sep 2022 17:19:52 +0200 [thread overview]
Message-ID: <20220920151952.GD30575@breakpoint.cc> (raw)
In-Reply-To: <b2f301f6-d335-04bd-43b2-001e5dcacc09@riosoft.com.br>
Bruno de Paula Larini <bruno.larini@riosoft.com.br> wrote:
> Hi,
> While testing my iptables ruleset on a Fedora 36, I've encountered an
> unexpected behaviour regarding FTP connection forwarding.
> I've reduced the ruleset to look like below.
> I've tried to "modprobe nf_conntrack_ftp" alone, but external clients still
> won't get data connections.
> Then I "modprobe nf_nat_ftp". It loads normally but after the first attempt
> to establish an FTP connection, the system freezes and sometimes prints the
> following message:
>
> Message from syslogd@fw1-test at Sep 20 09:33:28 ...
> kernel:watchdog: BUG: soft lockup - CPU#1 stuck for 26s! [swapper/1:0]
Thats all? No backtrace?
next prev parent reply other threads:[~2022-09-20 15:19 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-20 14:12 BUG: soft lockup on kernel 5.19.9 when attempting FTP connections Bruno de Paula Larini
2022-09-20 15:19 ` Florian Westphal [this message]
2022-09-20 15:41 ` Bruno de Paula Larini
2022-09-20 16:24 ` Florian Westphal
2022-09-20 18:53 ` Bruno de Paula Larini
2022-09-20 15:48 ` Reindl Harald
2022-09-20 16:35 ` [PATCH nf] netfilter: nf_ct_ftp: fix deadlock when nat rewrite is needed Florian Westphal
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