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We started detecting all kernel reboots as corrupted, because we considered that after any "Allocated" line a stack trace should follow. Kernel boot output now contains: ima: Allocated hash algorithm: sha256 and there is no stack trace after that. 1. Refine stack trace regexps (we actually want to look for "Allocated by task PID:" lines). 2. Don't check stacks if report format says that it does not contain stacks.
syzkaller - kernel fuzzer
syzkaller is an unsupervised coverage-guided kernel fuzzer. Linux kernel fuzzing has the most support, akaros, freebsd, fuchsia, netbsd, windows and gvisor are supported to varying degrees.
The project mailing list is syzkaller@googlegroups.com. You can subscribe to it with a google account or by sending an email to syzkaller+subscribe@googlegroups.com.
Documentation
Initially, syzkaller was developed with Linux kernel fuzzing in mind, but now it's being extended to support other OS kernels as well. Most of the documentation at this moment is related to the Linux kernel. For other OS kernels check: Akaros, FreeBSD, Fuchsia, NetBSD, OpenBSD, Windows, gVisor.
- How to install syzkaller
- How to use syzkaller
- How syzkaller works
- How to contribute to syzkaller
- How to report Linux kernel bugs
External Articles
- Research work based on syzkaller
- From HardenedLinux project:
- Kernel QA with syzkaller and qemu (tutorial on how to setup syzkaller with qemu)
- Syzkaller crash DEMO (tutorial on how to extend syzkaller with new syscalls)
- Kernel debug tool with syzkaller (debugging qemu VM created by syz-manager with gdb)
- Explanation of some syzkaller internals
- A example of fuzzing the ceph filesystem
- Coverage-guided kernel fuzzing with syzkaller (by David Drysdale)
- ubsan, kasan, syzkaller und co (video) (by Florian Westphal)
- Debugging a kernel crash found by syzkaller (by Quentin Casasnovas)
- Linux Plumbers 2016 talk slides
- syzkaller: the next gen kernel fuzzer (basics of operations, tutorial on how to run syzkaller and how to extend it to fuzz new drivers)
- syzbot and the tale of thousand kernel bugs [video]
Disclaimer
This is not an official Google product.