Chunk Header

OPPO Kernel Craftsman

Dec 31, 2021 · Information Security

Design and Implementation of the Android Scudo Hardened Allocator

The Android Scudo hardened allocator, introduced in Android R to replace jemalloc, uses a primary region‑based allocator, a secondary mmap‑backed allocator, thread‑specific caches, and a quarantine system with 64‑bit chunk headers and extensive safety checks, offering a balanced security‑performance trade‑off configurable via compile‑time, environment, and mallopt options.