Well, it all started with me placing an assert when populating a page table entry. the assert checks that there isn't a previous address in it.
Just when I started implementing clone(), the assert was triggered. and I couldn't understand where the previous address came from.
Turns out that in my copy_page_table function I did some temporary mapping to allow me to write to destination PDT. It was copied also...
damn.
I had to tell someone and my wife doesn't understand
