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Afl-fuzz is really amazing. The only thing that bums me out about it is that it is not as open as it could be. From AFL's documentation:

"PS. If you wish to submit raw code to be incorporated into the project, please be aware that the copyright on AFL is formally claimed by Google..."

I'm assuming that this would make forks unlikely or impossible?

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IANAL, But from the readme [1], it's Apache Licensed, so fork away - just make sure you retain their copyright notices and follow the rest of the license.

-edit- In addition, the bottom of the README which you quoted just mentions the need to sign a CLA if you want your code pushed upstream. See the FSF page about why they require copyright assignment [2] for their projects for some background.

[1] http://lcamtuf.coredump.cx/afl/README.txt [2] https://www.gnu.org/licenses/why-assign.html

Note that the Contributor License Agreement (CLA) and copyright assignment are rather different things. Google and the FSF have very different reasons for requiring their respective arrangements.

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