NILFS (loop2): disposed unprocessed dirty file(s) when stopping log writer
VFS: Busy inodes after unmount of loop2 (nilfs2)
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kernel BUG at fs/super.c:505!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4331 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026
pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : generic_shutdown_super+0x328/0x32c fs/super.c:503
lr : generic_shutdown_super+0x328/0x32c fs/super.c:503
sp : ffff800021b479d0
x29: ffff800021b479d0 x28: ffff0000cbe65680 x27: ffff0000cbe65680
x26: dfff800000000000 x25: 0000000000000002 x24: 1fffe0001b5764fb
x23: ffff0000dabb27d8 x22: dfff800000000000 x21: ffff8000120e9840
x20: ffff800016a8c040 x19: ffff0000dabb2000 x18: 1fffe00033c1c97e
x17: 20676e6970706f74 x16: ffff800011bcec98 x15: 0000000000000000
x14: 0000000000000001 x13: 1fffe00033c1c9a3 x12: 0000000000000000
x11: ff008000083170c8 x10: 0000000000000000 x9 : 4b1f12bd404e2900
x8 : 4b1f12bd404e2900 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff800021b47498 x4 : ffff800016504f40 x3 : ffff800008542ee8
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000030
Call trace:
 generic_shutdown_super+0x328/0x32c fs/super.c:503
 kill_block_super+0x78/0xe0 fs/super.c:1481
 deactivate_locked_super+0xb4/0x128 fs/super.c:332
 deactivate_super+0xe4/0x104 fs/super.c:363
 cleanup_mnt+0x3a8/0x430 fs/namespace.c:1191
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1198
 task_work_run+0x1f4/0x280 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 do_notify_resume+0x20f8/0x2c84 arch/arm64/kernel/signal.c:1151
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
 el0_svc+0x9c/0x12c arch/arm64/kernel/entry-common.c:638
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: b004a120 91188000 911aa261 97d971c5 (d4210000) 
---[ end trace 0000000000000000 ]---