Re: [PATCH RFC v2 0/6] Break heap spraying needed for exploiting use-after-free

[Daniel Micay]

It will reuse the memory for other things when the whole slab is freed
though. Not really realistic to change that without it being backed by
virtual memory along with higher-level management of regions to avoid
intense fragmentation and metadata waste. It would depend a lot on
having much finer-grained slab caches, otherwise it's not going to be
much of an alternative to a quarantine feature. Even then, a
quarantine feature is still useful, but is less suitable for a
mainstream feature due to performance cost. Even a small quarantine
has a fairly high performance cost.