From: Patrick McHardy <kaber@trash.net>
To: Jon Masters <jonathan@jonmasters.org>
Cc: Eric Dumazet <eric.dumazet@gmail.com>,
Alexey Dobriyan <adobriyan@gmail.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
netdev <netdev@vger.kernel.org>,
netfilter-devel <netfilter-devel@vger.kernel.org>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Subject: Re: [PATCH] netfilter: per netns nf_conntrack_cachep
Date: Tue, 02 Feb 2010 17:48:22 +0100 [thread overview]
Message-ID: <4B685756.8010107@trash.net> (raw)
In-Reply-To: <1265129192.2861.141.camel@tonnant>
Jon Masters wrote:
> On Tue, 2010-02-02 at 06:35 -0500, Jon Masters wrote:
>
>> I think there's something more fundamental going on here.
>
> What happens is the conntrack code attempts to free
> nf_conntrack_untracked back into the SL[U]B cache from which it
> allocates other ct's.
That shouldn't happen, the untracked conntrack is initialized to a
refcount of 1, which is never released.
> There's just one problem...that's a static struct
> not from the cache. So, this is why we end up with the SLAB being
> corrupted and the address immediately following the
> nf_conntrack_untracked being corrupted.
>
> I shoved some debug comments into the destroy code to see if we were
> trying to free nf_conntrack_untracked, and bingo. I have shoved a panic
> in there now, will send you a backtrace.
Thanks.
next prev parent reply other threads:[~2010-02-02 16:48 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-30 1:10 debug: nt_conntrack and KVM crash Jon Masters
2010-01-30 1:57 ` Jon Masters
2010-01-30 1:59 ` Jon Masters
2010-01-30 6:58 ` Eric Dumazet
2010-01-30 7:36 ` Jon Masters
2010-01-30 7:40 ` Jon Masters
2010-01-30 8:33 ` Eric Dumazet
2010-01-30 10:03 ` Jon Masters
2010-01-30 10:03 ` Jon Masters
2010-02-01 9:32 ` Jon Masters
2010-02-01 9:32 ` Jon Masters
2010-02-01 9:36 ` Alexey Dobriyan
2010-02-01 10:12 ` Eric Dumazet
2010-02-01 10:12 ` Eric Dumazet
2010-02-01 10:25 ` Alexey Dobriyan
2010-02-01 10:25 ` Alexey Dobriyan
2010-02-01 10:38 ` Jon Masters
2010-02-01 11:23 ` Eric Dumazet
2010-02-01 11:23 ` Eric Dumazet
2010-02-01 14:48 ` Alexey Dobriyan
2010-02-01 14:57 ` Eric Dumazet
2010-02-01 14:57 ` Eric Dumazet
2010-02-01 14:52 ` [PATCH] netfilter: per netns nf_conntrack_cachep Eric Dumazet
2010-02-01 14:52 ` Eric Dumazet
2010-02-01 14:58 ` Alexey Dobriyan
2010-02-01 15:02 ` Eric Dumazet
2010-02-02 11:04 ` Jon Masters
2010-02-02 11:35 ` Jon Masters
2010-02-02 16:46 ` Jon Masters
2010-02-02 16:48 ` Patrick McHardy [this message]
2010-02-02 17:07 ` Jon Masters
2010-02-02 17:58 ` Alexey Dobriyan
2010-02-02 18:16 ` Jon Masters
2010-02-02 18:34 ` Jon Masters
2010-02-02 18:36 ` Patrick McHardy
2010-02-02 18:39 ` Jon Masters
2010-02-02 18:42 ` Jon Masters
2010-02-03 12:10 ` Patrick McHardy
2010-02-03 18:38 ` Jon Masters
2010-02-03 19:09 ` Alexey Dobriyan
2010-02-03 19:43 ` Jon Masters
2010-02-03 19:46 ` Jon Masters
2010-02-03 19:53 ` Alexey Dobriyan
2010-02-03 20:04 ` Jon Masters
2010-02-03 19:51 ` Alexey Dobriyan
2010-02-03 19:53 ` Jon Masters
2010-02-03 20:01 ` Alexey Dobriyan
2010-02-04 12:25 ` Patrick McHardy
2010-02-04 12:27 ` Alexey Dobriyan
2010-02-04 12:30 ` Patrick McHardy
2010-02-04 12:35 ` Alexey Dobriyan
2010-02-04 13:04 ` Patrick McHardy
2010-02-04 13:18 ` Jon Masters
2010-02-04 13:37 ` Patrick McHardy
2010-02-04 13:42 ` Jon Masters
2010-02-03 20:21 ` Jon Masters
2010-02-04 12:24 ` Patrick McHardy
2010-02-02 16:58 ` PROBLEM with summary: " Jon Masters
2010-02-02 17:04 ` Patrick McHardy
2010-02-02 17:16 ` Eric Dumazet
2010-02-02 17:16 ` Eric Dumazet
2010-02-02 17:23 ` Jon Masters
2010-02-02 4:36 ` Jon Masters
2010-02-02 7:02 ` Jon Masters
2010-02-02 10:47 ` Jon Masters
2010-02-04 14:00 ` Patrick McHardy
2010-02-01 10:35 ` debug: nt_conntrack and KVM crash Jon Masters
2010-02-01 10:44 ` Alexey Dobriyan
2010-02-01 10:47 ` Alexey Dobriyan
2010-02-01 10:49 ` Alexey Dobriyan
2010-02-01 10:53 ` Jon Masters
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