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Individual AI skill · AI for Inteligencia e Investigación

ruzzy

Ruzzy is a coverage-guided fuzzer for Ruby built on libFuzzer. It enables fuzzing both pure Ruby code and Ruby C extensions with sanitizer support for detecting memory corruption and undefined behavior.

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Free ZIP · One canonical method · Usage example · Installation guide · Licence notices

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3Define done

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When to use it

Ruzzy is currently the only production-ready coverage-guided fuzzer for Ruby.

Choose Ruzzy when:

  • Fuzzing Ruby applications or libraries
  • Testing Ruby C extensions for memory safety issues
  • You need coverage-guided fuzzing for Ruby code
  • Working with Ruby gems that have native extensions

Mistakes to avoid

| Problem | Cause | Solution | |---------|-------|----------| | Installation fails | Wrong clang version or path | Verify clang path, use clang 14.0.0+ | | cannot open shared object file | LD_PRELOAD not set | Set LD_PRELOAD inline with ruby command | | Fuzzer immediately exits | Missing corpus directory | Create corpus directory or pass as argument | | No coverage progress | Pure Ruby needs tracer | Use tracer script for pure Ruby code | | Leak detection spam | Ruby interpreter leaks | Set ASAN_OPTIONS=detect_leaks=0 | | Installation debug needed | Compilation errors | Use RUZZY_DEBUG=1 gem install --verbose ruzzy |

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AI for Inteligencia e Investigación

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skills/transversal/knowledge/trailofbits-skills/plugins/testing-handbook-skills/skills/ruzzy
Ficha origin
Extracted from SKILL.md
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