[Users] Kernel crash when removing vznetdev module

[Vladimir Davydov]

On Jan 22, 2013, at 5:33 PM, Benjamin Henrion <bh at udev.org> wrote:

> 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

Not very informative. Where is the kernel log?

Anyway, I guess it is already filed:

https://bugzilla.openvz.org/show_bug.cgi?id=2487

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