[tor-bugs] #20893 [Core Tor/Tor]: Add a fuzzing harness for Tor

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#20893: Add a fuzzing harness for Tor
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 Reporter:  teor                   |          Owner:  nickm
     Type:  enhancement            |         Status:  needs_review
 Priority:  Medium                 |      Milestone:  Tor: 0.3.0.x-final
Component:  Core Tor/Tor           |        Version:
 Severity:  Normal                 |     Resolution:
 Keywords:  fuzz, review-group-15  |  Actual Points:
Parent ID:                         |         Points:  2
 Reviewer:                         |        Sponsor:
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Comment (by nickm):

 Hi!  I tried to improve the documentation.

 "Make fuzz" works now, but it doesn't fuzz: as documented, it runs each of
 the fuzzers against its corpus. (You'll need to download the corpora.)

 To actually fuzz, you need libfuzzer or afl installed.  Those can be a
 little tricky; I'd recommend whichever you have good distribution support
 for.

 I also added a fixup commit to remove src/or/dirsplit.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20893#comment:21>
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