Force kernel penic on linux?

Hey there!
I want to force a kernel panic, but don't really know an effective way to do it.
Tried feeding zeros to the memory by "cat /dev/zero > /dev/mem", but it has non-device access disabled. Tried killing init in various ways, but it ignores all those kill calls or something, so nothing happens. Making the system divide by zero shoul do the trick, but i don't know a fairly easy way to do that.
Any ideas?

you can't **force** kernel panic without actually exploiting a bug. simple commands will not do the job

>A kernel panic is an action taken by an operating system upon detecting an internal fatal error from which it cannot safely recover