Hello btrfs maintainers/developers, This is a 30-day syzbot report for btrfs subsystem. All related reports/information can be found at: https://syzkaller.appspot.com/upstream/s/btrfs During the period, 3 new issues were detected and 0 were fixed. In total, 53 issues are still open and 29 have been fixed so far. Some of the still happening issues: Crashes Repro Title 1442 Yes kernel BUG in close_ctree https://syzkaller.appspot.com/bug?extid=2665d678fffcc4608e18 221 Yes VFS: Busy inodes after unmount (use-after-free) https://syzkaller.appspot.com/bug?extid=0af00f6a2cba2058b5db 197 Yes WARNING in __kernel_write_iter https://syzkaller.appspot.com/bug?extid=12e098239d20385264d3 158 Yes WARNING in btrfs_space_info_update_bytes_may_use https://syzkaller.appspot.com/bug?extid=8edfa01e46fd9fe3fbfb 144 Yes WARNING in btrfs_chunk_alloc https://syzkaller.appspot.com/bug?extid=e8e56d5d31d38b5b47e7 143 Yes WARNING in btrfs_remove_chunk https://syzkaller.appspot.com/bug?extid=e8582cc16881ec70a430 84 Yes WARNING in kernfs_remove_by_name_ns (3) https://syzkaller.appspot.com/bug?extid=93cbdd0ab421adc5275d 71 Yes kernel BUG in assertfail (2) https://syzkaller.appspot.com/bug?extid=c4614eae20a166c25bf0 67 Yes INFO: task hung in lock_extent https://syzkaller.appspot.com/bug?extid=eaa05fbc7563874b7ad2 59 Yes WARNING in lookup_inline_extent_backref https://syzkaller.appspot.com/bug?extid=d6f9ff86c1d804ba2bc6 --- 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.