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Bug#673522: unshare NEWNET + using sockets from before: unregister_netdevice: waiting for lo to become free. Usage count = 2



On Sat, 2012-05-19 at 13:03 +0200, Stefan Bühler wrote:
> Package: linux-image-3.2.0-2-amd64
> Version: 3.2.16-1
> 
> Hi,
> 
> CLONE_NEWNET is still buggy (i found random reports with the same error message from 2010).
> 
> uname: Linux * 3.2.0-2-amd64 #1 SMP Mon Apr 30 05:20:23 UTC 2012 x86_64 GNU/Linux
> 
> See the attached example.
> I don't think it matters much how the socket is used: just create the socket
> before the unshare and use it somehow - listen() after unshare() triggered it too.
> 
> The kernel starts spamming the message after the program is terminated.
[...]

I don't think this has been fixed upstream, but please test the latest
stable version (Linux 3.3.6, available in experimental) and then report
this upstream (netdev@vger.kernel.org).

Ben.

-- 
Ben Hutchings
Experience is directly proportional to the value of equipment destroyed.
                                                         - Carolyn Scheppner

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