Whitepaper call Binding the Daemon: FreeBSD Kernel Stack and Heap Exploitation.
You can download it from the following link: https://packetstormsecurity.com/files/download/95385/binding-daemon.pdf
Source: https://packetstormsecurity.com/files/95385/Binding-The-Daemon-FreeBSD-Kernel-Stack-and-Heap-Exploitation.html