Understanding Stack Overflow

Stacking toward smaller memory addresses

Not necessarily. Is there a case where the stack does not stack toward a lower address?

Are addresses less than the stack limit rewrites?

Well, that's usually the case.Modern CPU/OS has a memory protection mechanism, so you may not be able to rewrite itself outside of the stack (=doesn't break or break anything).

Assuming the stack goes from the 0x2000 address to a smaller address on a 16-bit CPU,

• If the end of the stack (=minimum address) was a 0x1000, the stack overflow would destroy around the 0x0FFE address (=minimum address)
• If the end of the stack was 0x0000, it would destroy (=destroy large addresses) around the 0xFFE address.

Well, there are both.So if you don't assume a specific processing system, everything will be fine.