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Friday, October 1 • 9:05am - 9:50am
(VIRTUAL) Mitigating Linux Kernel Memory Corruptions with ARM Memory Tagging - Andrey Konovalov, xairy.io

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Memory Tagging Extension (MTE) is an ARM v8.5 feature that enables hardware-assisted validation of the correctness of memory accesses. In a nutshell, MTE allows assigning tags to memory allocations, as well as to pointers that refer to those allocations. When a pointer is accessed, the CPU performs a validity check that ensures that the memory tag matches the pointer tag. As of now, MTE is integrated into the Linux kernel. It is available in both mainline and the Android common kernels. This talk focuses on the way MTE is used to assert the validity of kernel memory accesses. The talk describes the current state of the newly added Hardware Tag-Based KASAN mode and its planned improvements.

Speakers
AK

Andrey Konovalov

Software Engineer, xairy.io
Andrey Konovalov is an independent security researcher focusing on the Linux kernel. Andrey is a contributor to multiple fuzzing-related Linux kernel subsystems and tools: KASAN — a bug-finding tool and a security mitigation; KCOV — a coverage collection subsystem; and syzkaller... Read More →



Friday October 1, 2021 9:05am - 9:50am PDT
Room 402 - Chiliwack
  Refereed Presentation
  • Talk Type Virtual
  • Presentation Slides Attached Yes