Portmanteau is an experimental unix driver IOCTL security tool that is useful for fuzzing and discovering device driver attack surface.
You can download it from the following link: https://packetstormsecurity.com/files/download/134230/portmanteau-release.tar.gz
Source: https://packetstormsecurity.com/files/134230/Portmanteau-Unix-Driver-IOCTL-Security-Tool.html