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, 8 new issues were detected and 0 were fixed. In total, 33 issues are still open and 94 have already been fixed. Some of the still happening issues: Ref Crashes Repro Title <1> 4450 Yes KMSAN: kernel-infoleak in filemap_read https://syzkaller.appspot.com/bug?extid=905d785c4923bea2c1db <2> 2406 Yes INFO: task hung in bdev_release https://syzkaller.appspot.com/bug?extid=4da851837827326a7cd4 <3> 1643 Yes INFO: task hung in blkdev_fallocate https://syzkaller.appspot.com/bug?extid=39b75c02b8be0a061bfc <4> 587 No INFO: task hung in bdev_open https://syzkaller.appspot.com/bug?extid=5c6179f2c4f1e111df11 <5> 335 Yes KASAN: slab-use-after-free Read in percpu_ref_put (2) https://syzkaller.appspot.com/bug?extid=905d719acdbd213bf67e <6> 287 Yes possible deadlock in blk_trace_setup https://syzkaller.appspot.com/bug?extid=0d8542c90a512dc95185 <7> 40 No INFO: task hung in set_blocksize https://syzkaller.appspot.com/bug?extid=3c0a6dfa116ca1e1ad1c <8> 37 Yes INFO: task hung in nbd_add_socket (2) https://syzkaller.appspot.com/bug?extid=cbb4b1ebc70d0c5a8c29 <9> 35 Yes INFO: task hung in blk_trace_ioctl (4) https://syzkaller.appspot.com/bug?extid=ed812ed461471ab17a0c <10> 28 Yes WARNING in blk_register_tracepoints https://syzkaller.appspot.com/bug?extid=c54ded83396afee31eb1 --- 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.