linux-kernel - Re: Soft lockup on shutdown in nf_ct_iterate

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Message-ID: <45E5C549.2030009@trash.net>
Date:	Wed, 28 Feb 2007 19:09:13 +0100
From:	Patrick McHardy <kaber@...sh.net>
To:	Chuck Ebbert <cebbert@...hat.com>
CC:	netfilter-devel@...ts.netfilter.org,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Soft lockup on shutdown in nf_ct_iterate_cleanup()

Chuck Ebbert wrote:
> Patrick McHardy wrote:
> 
>>This patch is against current stable-2.6.20, it applies
>>cleanly to 2.6.20 as well.
>
>
> Everything works OK, but I get:
> 
> BUG: warning: (!list_empty(&unconfirmed)) at
> net/netfilter/nf_conntrack_core.c:1068/nf_ct_cleanup()
> 
> <> nf_ct_cleanup+0x66/0x122 [nf_conntrack]
> <> kill_l4proto+0x0 [nf_conntrack]
> <> nf_conntrack_l4proto_unregister+0x7d/0x82 [nf_conntrack]
> <> nf_conntrack_l3proto_ipv4_fini+0x3c/0x46 [nf_conntrack_ipv4]
> <> sys_delete_module+0x18a/0x1b1


Thanks, the previous approach doesn't seem to work properly without
unpleasant event cache hacks. This patch takes a simpler approach
and keeps the unconfirmed list iteration, but makes sure to make
forward progress.


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