Kernelroll is a linux kernel module for advanced rickrolling. It patches the open system call to play a specified music file instead of other music files.

You need the address of sys_call_table in your kernel. Use

$ grep sys_call_table /boot/System.map-3.0.0-1-amd64
ffffffff81400300 R sys_call_table

on the respective System.map of your kernel to find out the address

Now fire up kernelroll.c and add yours:

void **sys_call_table = (void **)0xffffffff81400300;

This will probably be simplified in the future, but as sys_call_table isn't exported anymore in 2.6 kernels, we have to use some tricks.

Compile with:

$ make

Load with:

$ insmod kernelroll.ko rollfile=/path/to/rickroll.mp3

Fire up a music player of your choice and consider yourself rickrolled. ;)