On 10/08/2020 19:04, syzbot wrote: > syzbot has bisected this issue to: > > commit f86cd20c9454847a524ddbdcdec32c0380ed7c9b > Author: Jens Axboe <axboe@xxxxxxxxx> > Date: Wed Jan 29 20:46:44 2020 +0000 > > io_uring: fix linked command file table usage There are several known problems with io_uring_cancel_files() including races and hangs. I had some drafts and going to patch it in a week or so. > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16db4d3a900000 > start commit: 9420f1ce Merge tag 'pinctrl-v5.9-1' of git://git.kernel.or.. > git tree: upstream > final oops: https://syzkaller.appspot.com/x/report.txt?x=15db4d3a900000 > console output: https://syzkaller.appspot.com/x/log.txt?x=11db4d3a900000 > kernel config: https://syzkaller.appspot.com/x/.config?x=72cf85e4237850c8 > dashboard link: https://syzkaller.appspot.com/bug?extid=6338dcebf269a590b668 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=141dde52900000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15b196aa900000 > > Reported-by: syzbot+6338dcebf269a590b668@xxxxxxxxxxxxxxxxxxxxxxxxx > Fixes: f86cd20c9454 ("io_uring: fix linked command file table usage") > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection > -- Pavel Begunkov
