A module for crashing the kernel

A good module to test stability. I'd like to have that in mainline, in order to test, for example:
1) HA (high availability) systems and failover
2) database hot-standby systems and failover
3) VMs (virtual machines)
4) the host of VMs (does it trash the VMs filesystems?)
5) filesystems in general

of course that module should be replaced on production systems, but it would be really great for stability testing. Why *not* include it? It doesn't change any other kernel code, and is easy to maintain.