Messages in this thread | | | Subject | Re: INFO: rcu detected stall in sys_sendfile64 (2) | From | Tetsuo Handa <> | Date | Wed, 13 Mar 2019 06:11:18 +0900 |
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On 2019/03/13 2:15, Dmitry Vyukov wrote: >> Also, this bisection is finding multiple different crash patterns, which >> suggests that the crashed tests are not giving correct feedback to syzbot. > > Treating different crashes as just "crash" is intended. Kernel bugs > can manifest in very different ways. > Want fun, search for "bpf: sockhash, disallow bpf_tcp_close and update > in parallel" in https://syzkaller.appspot.com/?fixed=upstream > It lead to 50+ different failure modes. >
But syzbot already found a rather simple C reproducer ( https://syzkaller.appspot.com/text?tag=ReproC&x=116fc7a8c00000 ) for this bug. Was this reproducer used for bisection? I guess that if this reproducer was used, syzbot did not hit "WARNING: ODEBUG bug in netdev_freemem" cases.
Also, humans can sometimes find more simpler C reproducers from syzbot provided reproducers. It would be nice if syzbot can accept and use a user defined C reproducer for testing.
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