syzkaller
syzkaller is an unsupervised coverage-guided kernel fuzzer
... reports. A distributed architecture coordinates many fuzzing VMs, collects crash signatures, deduplicates them, and bisects to the first bad commit when possible. syzkaller maintains per-kernel “syz” descriptions so it understands arguments, flags, and resources of thousands of syscalls and ioctls across Linux and other kernels. It also ships sophisticated reproducers and minimization routines so developers get small, deterministic test cases they can run locally to fix bugs quickly.