Hello ext4 maintainers/developers, This is a 31-day syzbot report for the ext4 subsystem. All related reports/information can be found at: https://syzkaller.appspot.com/upstream/s/ext4 During the period, 1 new issues were detected and 0 were fixed. In total, 35 issues are still open and 116 have been fixed so far. There are also 2 low-priority issues. Some of the still happening issues: Ref Crashes Repro Title <1> 7311 Yes WARNING: locking bug in ext4_move_extents https://syzkaller.appspot.com/bug?extid=7f4a6f7f7051474e40ad <2> 597 Yes WARNING: locking bug in __ext4_ioctl https://syzkaller.appspot.com/bug?extid=a537ff48a9cb940d314c <3> 293 Yes WARNING: locking bug in ext4_ioctl https://syzkaller.appspot.com/bug?extid=a3c8e9ac9f9d77240afd <4> 155 No possible deadlock in evict (3) https://syzkaller.appspot.com/bug?extid=dd426ae4af71f1e74729 <5> 132 Yes INFO: task hung in sync_inodes_sb (5) https://syzkaller.appspot.com/bug?extid=30476ec1b6dc84471133 <6> 78 Yes INFO: rcu detected stall in clock_adjtime (2) https://syzkaller.appspot.com/bug?extid=628d3507228ad7472be1 <7> 22 Yes possible deadlock in ext4_xattr_inode_iget (2) https://syzkaller.appspot.com/bug?extid=352d78bd60c8e9d6ecdc <8> 17 Yes INFO: rcu detected stall in sys_unlink (3) https://syzkaller.appspot.com/bug?extid=c4f62ba28cc1290de764 <9> 17 Yes kernel BUG in __ext4_journal_stop https://syzkaller.appspot.com/bug?extid=bdab24d5bf96d57c50b0 <10> 16 Yes kernel BUG in ext4_enable_quotas https://syzkaller.appspot.com/bug?extid=693985588d7a5e439483 --- 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.