BUG: MAX_LOCKDEP_KEYS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 6093 Comm: syz-executor.2 Not tainted 6.16.0-syzkaller-g89748acdf226 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 register_lock_class+0x419/0x4c0 kernel/locking/lockdep.c:1332
 __lock_acquire+0xa6/0x1c90 kernel/locking/lockdep.c:5112
 lock_acquire kernel/locking/lockdep.c:5868 [inline]
 lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825
 touch_wq_lockdep_map+0xad/0x1c0 kernel/workqueue.c:3907
 __flush_workqueue+0x128/0x1230 kernel/workqueue.c:3949
 close_ctree+0x22e/0x1710 fs/btrfs/disk-io.c:4265
 generic_shutdown_super+0x156/0x390 fs/super.c:643
 kill_anon_super+0x3a/0x60 fs/super.c:1282
 btrfs_kill_super+0x3b/0x50 fs/btrfs/super.c:2114
 deactivate_locked_super+0xbe/0x1a0 fs/super.c:474
 deactivate_super fs/super.c:507 [inline]
 deactivate_super+0xde/0x100 fs/super.c:503
 cleanup_mnt+0x225/0x450 fs/namespace.c:1378
 task_work_run+0x14d/0x240 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xeb/0x110 kernel/entry/common.c:43
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:224 [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+0x3f6/0x4c0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6ccee7f197
Code: b0 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 b0 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007fff074967e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f6ccee7f197
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff074968a0
RBP: 00007fff074968a0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff07497960
R13: 00007f6cceec93b9 R14: 000000000003d4da R15: 0000000000000003
 </TASK>
BTRFS info (device loop2): last unmount of filesystem ed167579-eb65-4e76-9a50-61ac97e9b59d
BTRFS info (device loop2): last unmount of filesystem 99e89f45-b1a6-4213-835c-2b89aed70bf9
BTRFS info (device loop2): last unmount of filesystem a85095e3-afb5-4d7d-9768-ef3995af020e
BTRFS info (device loop2): last unmount of filesystem ed167579-eb65-4e76-9a50-61ac97e9b59d
BTRFS info (device loop2): last unmount of filesystem be39a4ea-503a-42b0-b333-fa19f9ac801f
BTRFS info (device loop2): last unmount of filesystem ed167579-eb65-4e76-9a50-61ac97e9b59d
BTRFS info (device loop2): last unmount of filesystem d073c53c-bf38-4bab-84c6-30e0a8ee508b
_btrfs_printk: 279 callbacks suppressed
BTRFS info (device loop2): last unmount of filesystem 0afd66e1-8b18-47a5-b1a5-b51efb09ae5c
BTRFS info (device loop2): last unmount of filesystem ed167579-eb65-4e76-9a50-61ac97e9b59d
BTRFS info (device loop2): last unmount of filesystem 710234c6-0b3f-4fb5-ac9d-a6ebeb7b2ff1
BTRFS info (device loop2): last unmount of filesystem ed167579-eb65-4e76-9a50-61ac97e9b59d
BTRFS info (device loop2): last unmount of filesystem e9d123de-0ba7-42e8-8030-1795be8c552f
BTRFS info (device loop2): last unmount of filesystem 66f1121e-86e8-4ed5-b416-f7afd2252f16
BTRFS info (device loop2): last unmount of filesystem 7ad1a958-8f7f-404e-ba47-1365564844f4