Posted a patchset that adds Hardware Tag-Based KASAN mode, that is based on arm64 Memory Tagging Extension: lkml.org/lkml/2020/8/14
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Requires latest QEMU for testing; as of a few days ago QEMU is able to properly emulate in-kernel MTE
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So far this new KASAN mode is just a debugging feature, but the ultimate goal is to have in-kernel MTE to be used as a memory corruption mitigation for production
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