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: 6011 Comm: syz-executor Tainted: G        W           6.17.0-rc1-syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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:3907
 __flush_workqueue+0x121/0x14b0 kernel/workqueue.c:3949
 drain_workqueue+0xd3/0x390 kernel/workqueue.c:4113
 destroy_workqueue+0xbb/0xc70 kernel/workqueue.c:5869
 btrfs_destroy_workqueue+0x45/0x240 fs/btrfs/async-thread.c:358
 btrfs_stop_all_workers+0x1f2/0x2a0 fs/btrfs/disk-io.c:1782
 close_ctree+0x707/0x1380 fs/btrfs/disk-io.c:4408
 generic_shutdown_super+0x132/0x2c0 fs/super.c:643
 kill_anon_super+0x3b/0x70 fs/super.c:1282
 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2114
 deactivate_locked_super+0xbc/0x130 fs/super.c:474
 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1378
 task_work_run+0x1d1/0x260 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xec/0x110 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: 0033:0x7fc648b9ff17
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:00007fff1420dfe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fc648c21c05 RCX: 00007fc648b9ff17
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff1420e0a0
RBP: 00007fff1420e0a0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff1420f130
R13: 00007fc648c21c05 R14: 00000000000bdeff R15: 00007fff1420f170
 </TASK>
BTRFS info (device loop4): last unmount of filesystem 296a73c8-1538-49d0-8552-9c6dd0bf7e15
BTRFS info (device loop4): last unmount of filesystem 395ef67a-297e-477c-816d-cd80a5b93e5d
BTRFS info (device loop4): last unmount of filesystem 03e7fa8f-dbed-4ab9-98c8-c9e0d5fc6f27
BTRFS info (device loop4): last unmount of filesystem 6c3ecc92-e6f2-425e-906b-cb243d89b9de
BTRFS info (device loop4): last unmount of filesystem cd0359b5-aa0e-4f36-a9c6-f5b9a9677f53
BTRFS info (device loop4): last unmount of filesystem a0f3e3ee-0393-4076-bcb1-80bd02126649
BTRFS info (device loop4): last unmount of filesystem 4ae9b1dc-3ce8-4d2f-b599-02e5be1e4b27
BTRFS info (device loop4): last unmount of filesystem cd62a0a5-6817-483a-be44-6f1e0d992507
BTRFS info (device loop4): last unmount of filesystem 9f932299-f09e-4501-bbcd-4507c40f1a54
BTRFS info (device loop4): last unmount of filesystem 65b5d8d1-7bdd-4f96-9511-b2a75886ab77
BTRFS info (device loop4): last unmount of filesystem 5ac23e90-a7c9-4cbf-9d86-f58006d78638
BTRFS info (device loop4): last unmount of filesystem 395ef67a-297e-477c-816d-cd80a5b93e5d
BTRFS info (device loop4): last unmount of filesystem 395ef67a-297e-477c-816d-cd80a5b93e5d