I haven't watched all of it, but the explanation for the null terminator bug must contain some OS interaction telling the kernel that it is actually safe to dis

I haven't watched all of it, but the explanation for the null terminator bug must contain some OS interaction telling the kernel that it is actually safe to discard the page containing the null terminator (e.g. the madvice call mentioned in a sibling post). If you're doing things like that, you're asking for trouble.