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, 4 new issues were detected and 0 were fixed. In total, 32 issues are still open and 122 have been fixed so far. There is also 1 low-priority issue. Some of the still happening issues: Ref Crashes Repro Title <1> 7985 Yes WARNING: locking bug in ext4_move_extents https://syzkaller.appspot.com/bug?extid=7f4a6f7f7051474e40ad <2> 664 Yes WARNING: locking bug in __ext4_ioctl https://syzkaller.appspot.com/bug?extid=a537ff48a9cb940d314c <3> 346 Yes WARNING: locking bug in ext4_ioctl https://syzkaller.appspot.com/bug?extid=a3c8e9ac9f9d77240afd <4> 166 No possible deadlock in evict (3) https://syzkaller.appspot.com/bug?extid=dd426ae4af71f1e74729 <5> 148 Yes INFO: task hung in sync_inodes_sb (5) https://syzkaller.appspot.com/bug?extid=30476ec1b6dc84471133 <6> 69 No WARNING in ext4_write_inode (2) https://syzkaller.appspot.com/bug?extid=748cc361874fca7d33cc <7> 19 No possible deadlock in start_this_handle (4) https://syzkaller.appspot.com/bug?extid=cf0b4280f19be4031cf2 <8> 18 No possible deadlock in ext4_da_get_block_prep https://syzkaller.appspot.com/bug?extid=a86b193140e10df1aff2 <9> 1 Yes kernel BUG in set_blocksize https://syzkaller.appspot.com/bug?extid=4bfc572b93963675a662 --- 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.