Messages in this thread | | | Date | Wed, 13 Mar 2019 12:37:01 -0400 | From | "Theodore Ts'o" <> | Subject | Re: INFO: rcu detected stall in sys_sendfile64 (2) |
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On Wed, Mar 13, 2019 at 07:43:38AM +0100, Dmitry Vyukov wrote: > It would be more useful to accept patches that make syzkaller create > better reproducers from these people. Manual work is not scalable. We > would need 10 reproducers per day for a dozen of OSes (incl some > private kernels/branches). Anybody is free to run syzkaller manually > and do full manual (perfect) reporting. But for us it become clear > very early that it won't work. Then see above, while that human is > sleeping/on weekend/vacation, syzbot will already bisect own > reproducer. Adding manual reproducer later won't help in any way. > syzkaller already does lots of smart work for reproducers. Let's not > give up on the last mile and switch back to all manual work.
I suspect a scalable solution that would significantly improve things is one where Syzbot tries N times for a "good" result to make sure it's not a flaky pass. N could either be hard-coded to some value like 8 or 10, or Syzbot could experimentally try to figure out how reliable the reproducer happens to be, and figure out what an ideal "N" value should be for a particular reproducer.
- Ted
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