fuzzing-obstacles

What problem does it solve?

Fuzzing obstacles block coverage during fuzz testing. This technique patches code to bypass non-deterministic checks and state while preserving production behavior, enabling deeper exploration of code paths.

Core Features & Use Cases

• Bypass checks during fuzzing: Temporarily relaxes checks like checksums or time-based seeds only in fuzzing builds.
• Deterministic fuzzing scaffolding: Ensures reproducibility by seeding PRNGs and stabilizing non-deterministic behavior for fuzz runs.
• Targeted validation bypass: Skips expensive multi-step validation during fuzzing with safe defaults to maintain downstream compatibility.

Quick Start

Identify an obstacle that blocks fuzzing progress (for example a checksum verification). Patch it with a conditional compilation guard that enables the obstacle bypass only in fuzzing builds. Rebuild the fuzzing target and run the fuzzer to confirm deeper coverage.