Fix returning pointer for zero-sized allocation outside of page

The problematic scenario looks like this:

- Allocate new page on arena

- Return pointer for the last piece of the page - so `offset == size`

- Try to allocate zero-sized segment - since `offset + 0 <= size` we return pointer to `page + offset`

- `GetStartOfPage(page + offset)` returns the next page - and it leads to malicious behavior for the next (probably unmapped) page

Now we don't allow to physically allocate zero-sized region and use aligned stub object.
commit_hash:5fa77d6bd78c7f712f35da943fcfe9023f78ec5e

0 files changed, 0 insertions, 0 deletions