Why doesn't the OS crash if I dereference a null pointer?

Question

Dereferencing a null pointer results in undefined behavior. In practice it usually means that my program will crash. But why doesn\'t the OS crash? Because if my progra

Answer 1

There are no rules of logical transitivity when it comes to UB. Your assumption is wrong.

UB does mean that anything can happen, so on a poorly written OS, your program might actually crash the OS. Don't rule it out.

Also, your program doesn't crash because you dereference a NULL pointer. It crashes because the OS tells it to crash.