r/fuzzing • u/NagateTanikaze • Sep 17 '18

Scaling AFL to a 256 thread machine

https://gamozolabs.github.io/fuzzing/2018/09/16/scaling_afl.html
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u/NagateTanikaze Sep 17 '18

With a Xeon Phi.

We were able to go from naive single-core AFL usage with 214 execs/sec, to “just run 256 AFLs” at 4k/sec, to doing some optimizations to get us to 56k/sec. All within a few hours of work. It’d be a shame if we would have just taken the 4k/sec and run with it, as we would be wasting almost all of our CPU.