Fuzzing USB with Raw Gadget | Munich BSides 2022

A talk about fuzzing Linux kernel USB drivers via Raw Gadget — a new interface for the Linux USB Gadget subsystem. Compared to other interfaces like GadgetFS, Raw Gadget provides more control over USB communication allowing the fuzzer to explore unusual paths within USB drivers. The talk briefly covers the Linux kernel USB subsystem architecture, explains how Raw Gadget is integrated into the subsystem, and shows how Raw Gadget is used to fuzz USB drivers with the help of syzkaller — a production-grade kernel fuzzer.

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