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  1. 1024050 README for testing/libfuzzer/research by Chris Bookholt · 31 hours ago main
  2. 2fb2a4d fuzzing: add centipede and options file to runtime_deps by Paul Semel · 4 days ago
  3. 753eac5 Create testing/libfuzzer/research for experimental, unsupported fuzzers and related tools. by Chris Bookholt · 7 days ago
  4. a86b6cf Double memory limit for browser_test fuzzers. by Adrian Taylor · 3 weeks ago
  5. cc2909a Small fuzztest documentation tweaks. by Adrian Taylor · 4 weeks ago

Fuzz testing in Chromium


Fuzzing is a testing technique that feeds auto-generated inputs to a piece of target code in an attempt to crash the code. It's one of the most effective methods we have for finding security and stability issues (see go/fuzzing-success). You can learn more about the benefits of fuzzing at go/why-fuzz.

This documentation covers the in-process guided fuzzing approach employed by different fuzzing engines, such as libFuzzer or [AFL]. To learn more about out-of-process fuzzers, please refer to the Blackbox fuzzing page in the ClusterFuzz documentation.

Getting Started

In Chromium, you can easily create and submit fuzz targets. The targets are automatically discovered by buildbots, built with different fuzzing engines, then uploaded to the distributed ClusterFuzz fuzzing system to run at scale.

You should fuzz any code which absorbs inputs from untrusted sources, such as the web. If the code parses, decodes, or otherwise manipulates that input, it's an especially good idea to fuzz it.

Create your first fuzz target and submit it by stepping through our Getting Started Guide.

Advanced Topics

Further Reading


Other Links