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arXiv · 2204.03781

Color My World: Deterministic Tagging for Memory Safety

Hans Liljestrand·Carlos Chinea·Rémi Denis-Courmont·Jan-Erik Ekberg·N. Asokan
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Abstract

Hardware-assisted memory protection features are increasingly being deployed in COTS processors. ARMv8.5 Memory Tagging Extensions (MTE) is a recent example, which has been used to provide probabilistic checks for memory safety. This use of MTE is not secure against the standard adversary with arbitrary read/write access to memory. Consequently MTE is used as a software development tool. In this paper we present the first design for deterministic memory protection using MTE that can resist the standard adversary, and hence is suitable for post-deployment memory safety. We describe our compiler extensions for LLVM Clang implementing static analysis and subsequent MTE instrumentation. Via a comprehensive evaluation we show that our scheme is effective.

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Hans Liljestrand, Carlos Chinea, Rémi Denis-Courmont, Jan-Erik Ekberg, N. Asokan. 2022-04-08. Color My World: Deterministic Tagging for Memory Safety. https://arxiv.org/abs/2204.03781

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