Hello block maintainers/developers, This is a 31-day syzbot report for the block subsystem. All related reports/information can be found at: https://syzkaller.appspot.com/upstream/s/block During the period, 3 new issues were detected and 2 were fixed. In total, 29 issues are still open and 87 have been fixed so far. Some of the still happening issues: Ref Crashes Repro Title <1> 868 Yes WARNING in blk_rq_map_user_iov https://syzkaller.appspot.com/bug?extid=a532b03fdfee2c137666 <2> 427 Yes INFO: task hung in blkdev_put (4) https://syzkaller.appspot.com/bug?extid=9a29d5e745bd7523c851 <3> 101 Yes INFO: task hung in blkdev_fallocate https://syzkaller.appspot.com/bug?extid=39b75c02b8be0a061bfc <4> 38 Yes KASAN: use-after-free Read in __dev_queue_xmit (5) https://syzkaller.appspot.com/bug?extid=b7be9429f37d15205470 <5> 34 Yes INFO: task hung in nbd_add_socket (2) https://syzkaller.appspot.com/bug?extid=cbb4b1ebc70d0c5a8c29 <6> 30 Yes INFO: task hung in blkdev_get_by_dev (5) https://syzkaller.appspot.com/bug?extid=6229476844294775319e <7> 24 Yes WARNING in blk_register_tracepoints https://syzkaller.appspot.com/bug?extid=c54ded83396afee31eb1 <8> 19 Yes WARNING in wait_til_done (2) https://syzkaller.appspot.com/bug?extid=9bc4da690ee5334f5d15 <9> 13 No WARNING in process_fd_request https://syzkaller.appspot.com/bug?extid=1d4201dfe9f2386fdc0b <10> 12 Yes general protection fault in start_motor (3) https://syzkaller.appspot.com/bug?extid=1fad709a9a55674f0e0b --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. To disable reminders for individual bugs, reply with the following command: #syz set <Ref> no-reminders To change bug's subsystems, reply with: #syz set <Ref> subsystems: new-subsystem You may send multiple commands in a single email message.