afl: afl (security-oriented fuzzer) afl: afl: American fuzzy lop is a security-oriented fuzzer that employs a afl: novel type of compile-time instrumentation and genetic algorithms to afl: automatically discover clean, interesting test cases that trigger new afl: internal states in the targeted binary. This substantially improves afl: the functional coverage for the fuzzed code. The compact synthesized afl: corpora produced by the tool are also useful for seeding other, afl: more labor- or resource-intensive testing regimes down the road. afl: afl: This package was built without QEMU support.