Subject: Re: net-next: warnings from sysctl_net_exit

From: Stephen Hemminger <[email-masked]>
Date: Sun, 27 Feb 2011 16:08:52 -0800

On Mon, 28 Feb 2011 00:37:09 +0200
Lucian Adrian Grijincu <[email-masked]> 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.