BTRFS info (device loop4): last unmount of filesystem bc5bb043-47f0-4e1f-a433-830a433106d6
BUG: MAX_LOCKDEP_KEYS too low!
turning off the locking correctness validator.
CPU: 0 PID: 6223 Comm: syz-executor.4 Not tainted 6.8.0-rc7-syzkaller-g707081b61156 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:291
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:298
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106
 dump_stack+0x1c/0x28 lib/dump_stack.c:113
 register_lock_class+0x568/0x6ac kernel/locking/lockdep.c:1321
 __lock_acquire+0x184/0x763c kernel/locking/lockdep.c:5014
 lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5754
 __flush_workqueue+0x14c/0x11c4 kernel/workqueue.c:3146
 drain_workqueue+0xb8/0x32c kernel/workqueue.c:3311
 destroy_workqueue+0xb8/0xdc4 kernel/workqueue.c:4793
 btrfs_destroy_workqueue+0x48/0x2f0 fs/btrfs/async-thread.c:361
 btrfs_stop_all_workers+0x1c0/0x240 fs/btrfs/disk-io.c:1797
 close_ctree+0x598/0xdec fs/btrfs/disk-io.c:4368
 btrfs_put_super+0x70/0x80 fs/btrfs/super.c:75
 generic_shutdown_super+0x128/0x2b8 fs/super.c:641
 kill_anon_super+0x4c/0x7c fs/super.c:1225
 btrfs_kill_super+0x40/0x58 fs/btrfs/super.c:2093
 deactivate_locked_super+0xc4/0x12c fs/super.c:472
 deactivate_super+0xe0/0x100 fs/super.c:505
 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1267
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1274
 task_work_run+0x230/0x2e0 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151
 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline]
 el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:713
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
BTRFS info (device loop4): last unmount of filesystem e5249c47-6beb-43d4-959b-5996434d7924
BTRFS info (device loop4): last unmount of filesystem 240b7ed9-1e2d-4031-bede-7d8ea542eafc
BTRFS info (device loop4): last unmount of filesystem 0a8bfb2c-9df5-400c-b6ec-278d0440921c
BTRFS info (device loop4): last unmount of filesystem 5e098df8-c8dd-41f7-9ae2-4d5a5ddb7ef8
BTRFS info (device loop4): last unmount of filesystem 7ca0c4ab-9a65-43d4-b7d2-cfe27ed6db6a
BTRFS info (device loop4): last unmount of filesystem 8c8bff43-f44c-4275-ba67-3226d690b91e
BTRFS info (device loop4): last unmount of filesystem b24633cc-d7d7-44e6-8f32-f740635d33a8
BTRFS info (device loop4): last unmount of filesystem 753ad118-e779-457f-9db5-2bc458c3574e
BTRFS info (device loop4): last unmount of filesystem ee41188c-85e6-4d41-b2fa-2450f139e774