I still need to pick the default sizes for github.com/AndroidHardeni including making it different across size classes, but it's nice to have nearly all planned core security features implemented. The missing pieces mostly involve providing more fine-grained slab randomization.
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The slab allocation quarantine has fairly high overhead so it's worth considering other approaches. It's important to be able to detect double-free within the quarantine which is difficult to do efficiently. A higher-level approach to delaying slot reuse might be interesting.
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