BTRFS info (device loop0): last unmount of filesystem a023a1a0-123e-43c9-bada-c755e5365bd9
BUG: MAX_LOCKDEP_KEYS too low!
turning off the locking correctness validator.
CPU: 1 PID: 15855 Comm: syz-executor.0 Not tainted 6.8.0-syzkaller-08073-g480e035fc4c7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
 register_lock_class+0x822/0x980 kernel/locking/lockdep.c:1321
 __lock_acquire+0xda/0x1fd0 kernel/locking/lockdep.c:5014
 lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754
 touch_wq_lockdep_map kernel/workqueue.c:3901 [inline]
 __flush_workqueue+0x1c9/0x1710 kernel/workqueue.c:3943
 drain_workqueue+0xc9/0x3a0 kernel/workqueue.c:4107
 destroy_workqueue+0xba/0xc40 kernel/workqueue.c:5673
 btrfs_stop_all_workers+0x24a/0x2a0 fs/btrfs/disk-io.c:1800
 close_ctree+0x664/0xd40 fs/btrfs/disk-io.c:4371
 generic_shutdown_super+0x136/0x2d0 fs/super.c:641
 kill_anon_super+0x3b/0x70 fs/super.c:1225
 btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2091
 deactivate_locked_super+0xc4/0x130 fs/super.c:472
 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1267
 task_work_run+0x24f/0x310 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:108 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
 syscall_exit_to_user_mode+0x168/0x360 kernel/entry/common.c:212
 do_syscall_64+0x10a/0x240 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f8912c7f0d7
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:00007ffcb1854f88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f8912c7f0d7
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffcb1855040
RBP: 00007ffcb1855040 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffcb1856100
R13: 00007f8912cc93b9 R14: 00000000002ee3ab R15: 0000000000000005
 </TASK>
BTRFS info (device loop0): last unmount of filesystem a6a605fc-d5f1-4e66-8595-3726e2b761d6
BTRFS info (device loop0): last unmount of filesystem 98481a40-d728-4540-9bc6-57e3f59819f1
BTRFS info (device loop0): last unmount of filesystem a6a605fc-d5f1-4e66-8595-3726e2b761d6
BTRFS info (device loop0): last unmount of filesystem 0534601c-4f63-441b-ae5b-1a9cf193dfa3
BTRFS info (device loop0): last unmount of filesystem 8804e90b-bc93-458f-a049-e54c34444d11
BTRFS info (device loop0): last unmount of filesystem 1edcfa25-233c-43ba-927a-59056330de48
BTRFS info (device loop0): last unmount of filesystem b5480ed8-c867-4c1a-9035-ab9bbd114607
BTRFS info (device loop0): last unmount of filesystem ed91fbe5-4468-4d66-b5e7-7fdebfe9a8e7
BTRFS info (device loop0): last unmount of filesystem a6a605fc-d5f1-4e66-8595-3726e2b761d6
BTRFS info (device loop0): last unmount of filesystem a6a605fc-d5f1-4e66-8595-3726e2b761d6
BTRFS info (device loop0): last unmount of filesystem a6a605fc-d5f1-4e66-8595-3726e2b761d6