NILFS (loop0): DAT doesn't have a block to manage vblocknr = 107374182
NILFS error (device loop0): nilfs_bmap_propagate: broken bmap (inode number=3)
Remounting filesystem read-only
NILFS (loop0): error -5 cleaning segments
NILFS (loop0): error -30 cleaning segments
NILFS (loop0): disposed unprocessed dirty file(s) when stopping log writer
VFS: Busy inodes after unmount of loop0 (nilfs2)
------------[ cut here ]------------
kernel BUG at fs/super.c:733!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5362 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:generic_shutdown_super+0x2ca/0x2d0 fs/super.c:731
Code: 03 42 80 3c 28 00 74 08 4c 89 f7 e8 00 d5 eb ff 49 8b 16 48 81 c3 c0 06 00 00 48 c7 c7 60 5d 40 8c 48 89 de e8 67 71 d1 fe 90 <0f> 0b 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000dc27970 EFLAGS: 00010246
RAX: 0000000000000030 RBX: ffff88801373c6c0 RCX: 032e85dc7bddbd00
RDX: 0000000000000000 RSI: 8000000000000000 RDI: 0000000000000000
RBP: 1ffff110026e78fa R08: ffffc9000dc276e7 R09: 1ffff92001b84edc
R10: dffffc0000000000 R11: fffff52001b84edd R12: 0000000000000000
R13: dffffc0000000000 R14: ffffffff9072acc0 R15: ffff88801373c7d0
FS:  0000000000000000(0000) GS:ffff88808a9fe000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efdf1a3f000 CR3: 0000000013609000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 kill_block_super+0x44/0xa0 fs/super.c:1852
 deactivate_locked_super+0xbe/0x110 fs/super.c:558
 cleanup_mnt+0x204/0x2a0 fs/namespace.c:1396
 task_work_run+0x1d9/0x260 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x705/0x2360 kernel/exit.c:980
 do_group_exit+0x22d/0x2f0 kernel/exit.c:1123
 get_signal+0x136a/0x1430 kernel/signal.c:3113
 arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
 exit_to_user_mode_loop+0x10e/0x770 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
 do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efdfdb9fb19
Code: Unable to access opcode bytes at 0x7efdfdb9faef.
RSP: 002b:00007efdf9ff4fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffe2 RBX: 00007efdfde26090 RCX: 00007efdfdb9fb19
RDX: 0000200000001700 RSI: 0000000040786e88 RDI: 0000000000000004
RBP: 00007efdfdc37b70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007efdfde26128 R14: 00007efdfde26090 R15: 00007ffdf4c39d68
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:generic_shutdown_super+0x2ca/0x2d0 fs/super.c:731
Code: 03 42 80 3c 28 00 74 08 4c 89 f7 e8 00 d5 eb ff 49 8b 16 48 81 c3 c0 06 00 00 48 c7 c7 60 5d 40 8c 48 89 de e8 67 71 d1 fe 90 <0f> 0b 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000dc27970 EFLAGS: 00010246
RAX: 0000000000000030 RBX: ffff88801373c6c0 RCX: 032e85dc7bddbd00
RDX: 0000000000000000 RSI: 8000000000000000 RDI: 0000000000000000
RBP: 1ffff110026e78fa R08: ffffc9000dc276e7 R09: 1ffff92001b84edc
R10: dffffc0000000000 R11: fffff52001b84edd R12: 0000000000000000
R13: dffffc0000000000 R14: ffffffff9072acc0 R15: ffff88801373c7d0
FS:  0000000000000000(0000) GS:ffff88808a9fe000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efdf1a3f000 CR3: 0000000013923000 CR4: 0000000000352ef0