linux-kernel - Re: 2.6.24 regression: reference count leak in PPPoE

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Message-ID: <20080120225942.GA31612@elf.ucw.cz>
Date:	Sun, 20 Jan 2008 23:59:42 +0100
From:	Pavel Machek <pavel@....cz>
To:	Andi Kleen <ak@...e.de>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: 2.6.24 regression: reference count leak in PPPoE

Hi!

> My workstation running 2.6.24-rc8 just hung during shutdown with an endless 
> (or rather I didn't wait more than a few minutes) loop of 
> 
> unregister_netdev: waiting for ppp-device to become free. Usage count = 1
> 
> ppp-device was an active PPPoE device.
> 
> No more information currently.

Actually, I'm getting something similar:

usb 2-2: USB disconnect, address 23
PM: Removing info for No Bus:usbdev2.23_ep83
usb0: unregister 'cdc_ether' usb-0000:00:1d.0-2, CDC Ethernet Device
PM: Removing info for No Bus:usb0
unregister_netdevice: waiting for usb0 to become free. Usage count = 1
unregister_netdevice: waiting for usb0 to become free. Usage count = 1
unregister_netdevice: waiting for usb0 to become free. Usage count = 1
unregister_netdevice: waiting for usb0 to become free. Usage count = 1
unregister_netdevice: waiting for usb0 to become free. Usage count = 1
unregister_netdevice: waiting for usb0 to become free. Usage count = 1
PM: Removing info for usb:2-2:1.0
PM: Removing info for No Bus:usbdev2.23_ep81
PM: Removing info for No Bus:usbdev2.23_ep02

The unregister_netdevice made it onto console, that means pretty
severe log level. Happened while playing with openmoko connected with
USB cable.
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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