From the article being ranted about: "Next time, we’ll look at how a process can not only map NULL in its own address space, but can also create mappings in the

From the article being ranted about: "Next time, we’ll look at how a process can not only map NULL in its own address space, but can also create mappings in the kernel’s address space. And, I’ll show you how this lets an attacker use a NULL dereference in the kernel to take over the entire machine. Stay tuned!" So it's not really about handling NULL ptr derefs, but exploiting them.