[Bug 437045] [NEW] Hardy Hangs with looping "unregister_netdevice: waiting for ppp0 to become free. Usage count = 1" on console

[raghu]

Public bug reported:

It appears to be a deadlock problem with a net device not being able to
be released.

This happens when two pppoe connections are in use at the same time with an ipsec tunnel using racoon. 
Then, intermittently the server just hangs with the following looping message.

unregister_netdevice: waiting for ppp0 to become free. Usage count = 1

The only option is to reboot the server.

It's a regression bug and supposedly fixed in 2.6.24 series. But the
problem still persists.

To reproduce:

1. Two pppoe connections
2. Establish IP-sec tunnel with racoon
3. System defintly hangs after a while ( less then 24 hrs)

Also, the two connections are very unsteady which reults in lot of if ups/downs which in a combination with the 
ip-sec tunnel I suppose triggers the problem

ProblemType: Bug
Architecture: amd64
Date: Sat Sep 26 11:03:20 2009
Dependencies:
 
DistroRelease: Ubuntu 8.04
Package: linux None [modified: /var/lib/dpkg/info/linux.list]
PackageArchitecture: amd64
ProcEnviron:
 PATH=/usr/lib/kde4/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/X11R6/bin
 LANG=en_IN
 SHELL=/bin/bash
SourcePackage: linux-meta
Uname: Linux 2.6.24-24-server x86_64

** Affects: linux-meta (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug

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Hardy Hangs with looping "unregister_netdevice: waiting for ppp0 to become free. Usage count = 1" on console
https://bugs.launchpad.net/bugs/437045
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