BTRFS info (device loop1): last unmount of filesystem 1a10572e-7456-47f3-bcae-36d21e0256dd
BUG: MAX_LOCKDEP_KEYS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 5943 Comm: syz-executor Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 register_lock_class+0x2e8/0x320 kernel/locking/lockdep.c:1332
 __lock_acquire+0x99/0xd20 kernel/locking/lockdep.c:5112
 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868
 touch_wq_lockdep_map+0xcb/0x180 kernel/workqueue.c:3936
 __flush_workqueue+0x121/0x14b0 kernel/workqueue.c:3978
 drain_workqueue+0xd3/0x390 kernel/workqueue.c:4142
 destroy_workqueue+0xbb/0xc70 kernel/workqueue.c:5901
 btrfs_stop_all_workers+0xf4/0x2a0 fs/btrfs/disk-io.c:1775
 close_ctree+0x707/0x1380 fs/btrfs/disk-io.c:4410
 generic_shutdown_super+0x132/0x2c0 fs/super.c:642
 kill_anon_super+0x3b/0x70 fs/super.c:1281
 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2129
 deactivate_locked_super+0xbc/0x130 fs/super.c:473
 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1327
 task_work_run+0x1d4/0x260 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xe9/0x130 kernel/entry/common.c:43
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6e05a101f7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffcd49d9be8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f6e05a91d7d RCX: 00007f6e05a101f7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffcd49d9ca0
RBP: 00007ffcd49d9ca0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffcd49dad30
R13: 00007f6e05a91d7d R14: 0000000000094a00 R15: 00007ffcd49dad70
 </TASK>
BTRFS info (device loop1): last unmount of filesystem a6a605fc-d5f1-4e66-8595-3726e2b761d6
BTRFS info (device loop1): last unmount of filesystem 2877cea1-e9fc-4598-98e2-4ee3fc542a71
BTRFS info (device loop1): last unmount of filesystem 3c1b16ac-9a9b-4c40-865a-69bb25a949dc
BTRFS info (device loop1): last unmount of filesystem 55cd1643-0a96-471d-8ad7-450868c19cea
BTRFS info (device loop1): last unmount of filesystem 505b0d74-4db1-4020-a000-1a245ed8a94a
BTRFS info (device loop1): last unmount of filesystem a6a605fc-d5f1-4e66-8595-3726e2b761d6
BTRFS info (device loop1): last unmount of filesystem f042a583-e0cd-4869-9d8c-64a4d81f3add
BTRFS info (device loop1): last unmount of filesystem a679e7ac-c393-4663-ac91-ebe8e1905f72
BTRFS info (device loop1): last unmount of filesystem befb8682-5d16-49d1-b142-6274f70bfa97
BTRFS info (device loop1): last unmount of filesystem a6a605fc-d5f1-4e66-8595-3726e2b761d6
BTRFS info (device loop1): last unmount of filesystem d269eb0a-30cb-4a52-a181-db86f3a611c7
BTRFS info (device loop1): last unmount of filesystem 72e616a9-7e5b-4206-b9d2-a1336fbe6062