# libFuzzer in Chrome

[go/libfuzzer-chrome](https://goto.google.com/libfuzzer-chrome)

*** aside
[Getting Started](getting_started.md)
| [Buildbot](https://goto.google.com/libfuzzer-clusterfuzz-buildbot)
| [ClusterFuzz Status](https://goto.google.com/libfuzzer-clusterfuzz-status)
| [Cover Bug]
***

This directory contains integration between [libFuzzer] and Chrome.
libFuzzer is an in-process coverage-driven evolutionary fuzzer. It helps
engineers to uncover potential security & stability problems earlier.

*** note
**Requirements:** libFuzzer in Chrome is supported with GN on Linux only. 
Check [Reference] for experimental platform availability.
***

## Integration Status

Fuzzer tests are well-integrated with Chrome build system & distributed 
ClusterFuzz fuzzing system. Cover bug: [crbug.com/539572].

## Documentation

* [Getting Started Guide] walks you through all the steps necessary to create
your fuzzer and submit it to ClusterFuzz.
* [Efficient Fuzzer Guide] explains how to measure fuzzer effectiveness and
ways to improve it.
* [ClusterFuzz Integration] describes integration between ClusterFuzz and 
libFuzzer.
* [Reproducing] contains information on how to reproduce bugs reported by
  ClusterFuzz.
* [Reference] contains detailed references for different integration parts.


## Trophies
* [ClusterFuzz Bugs] - issues found and automatically filed by ClusterFuzz.
* [Manual Bugs] - issues that were filed manually after running fuzzers.
* [Pdfium Bugs] - bugs found in pdfium by manual fuzzing.
* [OSS Trophies] - bugs found with libFuzzer in open-source projects.


## Blog Posts
* [Guided in-process fuzzing of Chrome components].

## Project Links
* [libFuzzer Infrastructure Bugs]

[libFuzzer]: http://llvm.org/docs/LibFuzzer.html
[crbug.com/539572]: https://bugs.chromium.org/p/chromium/issues/detail?id=539572
[Cover Bug]: https://bugs.chromium.org/p/chromium/issues/detail?id=539572
[Getting Started Guide]: getting_started.md
[Efficient Fuzzer Guide]: efficient_fuzzer.md
[ClusterFuzz Integration]: clusterfuzz.md
[Reproducing]: reproducing.md
[Reference]: reference.md
[ClusterFuzz Bugs]: https://bugs.chromium.org/p/chromium/issues/list?can=1&q=label:Stability-LibFuzzer%20label:ClusterFuzz&sort=-modified&colspec=ID%20Pri%20M%20Stars%20ReleaseBlock%20Component%20Status%20Owner%20Summary%20OS%20Modified
[Pdfium Bugs]: https://bugs.chromium.org/p/pdfium/issues/list?can=1&q=libfuzzer&colspec=ID+Type+Status+Priority+Milestone+Owner+Summary&cells=tiles
[Manual Bugs]: https://bugs.chromium.org/p/chromium/issues/list?can=1&q=label%3AStability-LibFuzzer+-label%3AClusterFuzz&sort=-modified&colspec=ID+Pri+M+Stars+ReleaseBlock+Component+Status+Owner+Summary+OS+Modified&x=m&y=releaseblock&cells=ids
[OSS Trophies]: http://llvm.org/docs/LibFuzzer.html#trophies
[Guided in-process fuzzing of Chrome components]: https://security.googleblog.com/2016/08/guided-in-process-fuzzing-of-chrome.html
[libFuzzer Infrastructure Bugs]: https://bugs.chromium.org/p/chromium/issues/list?q=label:LibFuzzer-Infra