[Users] Kernel crash when removing vznetdev module

[Benjamin Henrion]

Hi,

With a RH machine with the stable openvz kernel, I managed to crash
the machine with this:

root at 203 /etc/vz/conf [26]# rmmod vznetdev
ERROR: Module vznetdev is in use
root at 203 /etc/vz/conf [27]# /etc/init.d/vz stop
Suspending CT 207
Suspending CT 207
Suspending CT 207
Shutting down CT 207
Bringing down interface venet0:                            [  OK  ]
Stopping OpenVZ:                                           [  OK  ]
root at 203 /etc/vz/conf [28]# rmmod vznetdev
ERROR: Module vznetdev does not exist in /proc/modules
root at 203 /etc/vz/conf [29]# /etc/init.d/vz start^C
root at 203 /etc/vz/conf [29]# vzctl set 207 --onboot no
WARNING: Settings were not saved to config (use --save flag)
root at 203 /etc/vz/conf [30]# vzctl set 207 --onboot no --save
CT configuration saved to /etc/vz/conf/207.conf
root at 203 /etc/vz/conf [31]# /etc/init.d/vz start
Starting OpenVZ:                                           [  OK  ]
Applying OOM adjustments:                                  [  OK  ]
Bringing up interface venet0:                              [  OK  ]
root at 203 /etc/vz/conf [32]# rmmod vznetdev
root at 203 /etc/vz/conf [33]# vzctl start 207
Starting container...
Container is mounted
Setting CPU units: 1000

->  Kernel panic

-- 
Benjamin Henrion <bhenrion at ffii.org>
FFII Brussels - +32-484-566109 - +32-2-3500762
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