netdev - Re: net-next: warnings from sysctl_net

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Message-ID: <20110227160852.4f748c1f@nehalam>
Date:	Sun, 27 Feb 2011 16:08:52 -0800
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Lucian Adrian Grijincu <lucian.grijincu@...il.com>
Cc:	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: net-next: warnings from sysctl_net_exit

On Mon, 28 Feb 2011 00:37:09 +0200
Lucian Adrian Grijincu <lucian.grijincu@...il.com> wrote:

> Stephen Hemminger <shemminger <at> vyatta.com> writes:
> > [26207.669740]  [<ffffffff814154ad>] ? sysctl_net_exit+0x2a/0x2c
> > [26207.669742]  [<ffffffff8136144e>] ? ops_exit_list+0x2a/0x5b
> > [26207.669745]  [<ffffffff813618f0>] ? cleanup_net+0xfa/0x19a
> 
> 
> David: it looks like someone registered a /proc/sys table with
> register_net_sysctl_table but forgot to remove it (or someone wrote
> something in the 'struct net*' and buffer overflowed into
> &net->sysctls.list).
> 
> Stephen, can you post a `ls -R /proc/sys/net/` from before the dmesg
> message appeared?
> 
> The check is triggered at network namespace deletion, so a moment
> before deleting the netns should be fine.

Although the kernel was compiled with netns, I never use net namespaces.
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