bhargav-j47/Usurper ? reverse-engineered prompt

Build me this simple Linux kernel module project that demonstrates how a custom proc entry can change the current process credentials to root when a specific phrase is written to it.

I want it to compile with a Makefile, load as a .ko module, create a /proc/usurper file, log when the module is loaded and unloaded, and let me test it from a normal user shell after it has been inserted. Keep it small and easy to follow, since this is just for learning Linux kernel internals like proc_fs, credentials, and process handling.

Please make sure it works cleanly on a recent Linux system with kernel headers installed, and include any small setup or verification steps I need. If something about current kernel APIs has changed, look up the latest docs online and adjust the code accordingly.