BTRFS info (device loop4): last unmount of filesystem 395ef67a-297e-477c-816d-cd80a5b93e5d
BUG: MAX_LOCKDEP_KEYS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 5985 Comm: syz-executor Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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_destroy_workqueue+0x45/0x240 fs/btrfs/async-thread.c:358
 btrfs_stop_all_workers+0x218/0x2a0 fs/btrfs/disk-io.c:1783
 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/0x3b0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f264b2401f7
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:00007ffddd7005f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f264b2c1d7d RCX: 00007f264b2401f7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffddd7006b0
RBP: 00007ffddd7006b0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffddd701740
R13: 00007f264b2c1d7d R14: 00000000000a48b9 R15: 00007ffddd701780
 </TASK>
BTRFS info (device loop4): last unmount of filesystem a37b98e5-62ee-4397-85c3-2280abeaa002
BTRFS info (device loop4): last unmount of filesystem c0a85102-c57b-41e1-9695-e86034c04068
BTRFS info (device loop4): last unmount of filesystem 4589db5b-ce92-48ac-8f0c-8a58b0749084
BTRFS info (device loop4): last unmount of filesystem 395ef67a-297e-477c-816d-cd80a5b93e5d
BTRFS info (device loop4): last unmount of filesystem c4002e80-9459-46e5-ab84-0dc6f5561e59
BTRFS info (device loop4): last unmount of filesystem f9a52ab2-1734-4b2d-96e2-f2c92537d1e2
BTRFS info (device loop4): last unmount of filesystem b30afa6a-cb94-4d3d-bc0e-7c8f3d005c16
BTRFS info (device loop4): last unmount of filesystem 712e5efd-7c44-4a77-821c-21b18506ebd6
BTRFS info (device loop4): last unmount of filesystem f27a6fdd-b664-4e6f-a48b-0032e1002fa1
BTRFS info (device loop4): last unmount of filesystem 395ef67a-297e-477c-816d-cd80a5b93e5d
BTRFS info (device loop4): last unmount of filesystem b554ede9-6fc0-4e18-aaac-f993da8e27d3
BTRFS info (device loop4): last unmount of filesystem 395ef67a-297e-477c-816d-cd80a5b93e5d
BTRFS info (device loop4): last unmount of filesystem 60e1f623-e3de-4fe8-af68-6725c0c35f7b
BTRFS info (device loop4): last unmount of filesystem c908ab14-b752-4f1d-9ba1-f1cd29315d9c
BTRFS info (device loop4): last unmount of filesystem e17219c7-e545-4116-9132-337166335c60
BTRFS info (device loop4): last unmount of filesystem 2488fe4d-318f-4b86-aa06-bb30d244fda3
BTRFS info (device loop4): last unmount of filesystem 395ef67a-297e-477c-816d-cd80a5b93e5d
BTRFS info (device loop4): last unmount of filesystem ccb9d759-ecca-4292-a979-a629d02c1de1