thepudds Profile picture
Jan 6 6 tweets 3 min read
Sharing a project that aims to make fuzzing more accessible:

fzgen builds on Go 1.18 fuzzing, adding:
- Fuzz complex types (structs, interfaces, ...)
- Auto gen fuzzing wrappers from normal code
- Auto hunt for concurrency bugs

#fuzzing #golang 1/n
Some fun examples...

Fuzzing the syzkaller implementation without writing any code:…

Finding a data race without writing any code:…

fzgen can also auto-gen some common fuzzing idioms like roundtrip validation.

Example for Marshal/Unmarshal:…

I'd like to add more fuzzing idioms... Ideas?

fzgen can emit a standalone reproducer as Go code.

(Code is optionally created after the fact based on the execution time in-memory DAG of operations).

Example for a real concurrency bug:…

The concept is to get people going, and they can adapt the auto-gen code if desired.

fzgen is still WIP, but hopefully useful.

I have a few ideas on what to add next, but I'd be curious to hear any ideas or suggestions...



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