[dzaima]

This shouldn't ever be a security vulnerability, outside of perhaps denial of service from segfaults (though I'm pretty sure you'd find hardware with no page faults before finding one with pages less than 4KB; and of course, if you wanted to not be hard-coding 4KB, a compiler providing a "minimum page size" constant for the target architecture should be possible, and could return 1 on page-less hardware). But, yes, as with many optimizations, getting them wrong could end up badly.