From: Julia Lawall Date: Fri, Apr 12, 2019 at 3:21 PM > On Fri, 12 Apr 2019, Pavel Machek wrote: > > > On Fri 2019-04-12 04:42:01, syzbot wrote: > > > syzbot has bisected this bug to: > > > > > > commit c68729119f4d2993bec3c9cb999ad76de5aeddba > > > Author: Julia Lawall <julia.law...@lip6.fr> > > > Date: Sat Jul 15 09:58:19 2017 +0000 > > > > > > leds: tlc591xx: add missing of_node_put > > > > > > bisection log: > > > https://syzkaller.appspot.com/x/bisect.txt?x=12cda0f3200000 > > > start commit: 23203e3f Merge branch 'akpm' (patches from Andrew) > > > git tree: upstream > > > final crash: > > > https://syzkaller.appspot.com/x/report.txt?x=11cda0f3200000 > > > console output: https://syzkaller.appspot.com/x/log.txt?x=16cda0f3200000 > > > kernel config: https://syzkaller.appspot.com/x/.config?x=861a3573f4e78ba1 > > > dashboard link: > > > https://syzkaller.appspot.com/bug?extid=e1a4f80c370d2381e49f > > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17836d15400000 > > > > > > Reported-by: syzbot+e1a4f80c370d2381e...@syzkaller.appspotmail.com > > > Fixes: c68729119f4d ("leds: tlc591xx: add missing of_node_put") > > > > > > For information about bisection process see: > > > https://goo.gl/tpsmEJ#bisection > > > > Can you revert c68729119f4d2993bec3c9cb999ad76de5aeddba on master and > > see if it fixes the problem? Because this is hard to believe... > > Likewise, it seems hard to believe that the change is a problem. But > could the problem be elsewhere and triggered by this code?
Looking at the bisection log, this looks like a hard to reproduce, flaky crash. Most likely the crash did not fire on one of the commits and that diverted bisection in the wrong direction.
