vulnerability author: Max Kellermann <[email protected]>
    
    max kellermann explanation: https://dirtypipe.cm4all.com/
    

PAGE CACHE:   https://manybutfinite.com/post/page-cache-the-affair-between-memory-and-files/

PIPE:   https://github.com/angrave/SystemProgramming/wiki/Pipes%2C-Part-1%3A-Introduction-to-pipes
        
        https://github.com/angrave/SystemProgramming/wiki/Pipes%2C-Part-2%3A-Pipe-programming-secrets
        
SPLICE SYSCALL:   https://man7.org/linux/man-pages/man2/splice.2.html#:~:text=splice()%20moves%20data%20between,must%20refer%20to%20a%20pipe.