BUG: MAX_LOCKDEP_KEYS too low! turning off the locking correctness validator. CPU: 1 UID: 0 PID: 31794 Comm: syz-executor Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 register_lock_class+0x310/0x348 kernel/locking/lockdep.c:1332 __lock_acquire+0xbc/0x30a4 kernel/locking/lockdep.c:5112 lock_acquire+0x140/0x2e0 kernel/locking/lockdep.c:5868 touch_wq_lockdep_map+0xa8/0x164 kernel/workqueue.c:3940 __flush_workqueue+0xfc/0x109c kernel/workqueue.c:3982 drain_workqueue+0xa4/0x310 kernel/workqueue.c:4146 destroy_workqueue+0xb4/0xd90 kernel/workqueue.c:5903 btrfs_destroy_workqueue+0x48/0x2c0 fs/btrfs/async-thread.c:358 btrfs_stop_all_workers+0x15c/0x218 fs/btrfs/disk-io.c:1774 close_ctree+0x5c8/0x1138 fs/btrfs/disk-io.c:4394 btrfs_put_super+0x1ac/0x1c0 fs/btrfs/super.c:74 generic_shutdown_super+0x12c/0x2b8 fs/super.c:643 kill_anon_super+0x4c/0x7c fs/super.c:1289 btrfs_kill_super+0x40/0x58 fs/btrfs/super.c:2129 deactivate_locked_super+0xc4/0x12c fs/super.c:474 deactivate_super+0xe0/0x100 fs/super.c:507 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1318 __cleanup_mnt+0x20/0x30 fs/namespace.c:1325 task_work_run+0x1dc/0x260 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:44 [inline] exit_to_user_mode_loop+0x10c/0x18c kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] exit_to_user_mode_prepare_legacy include/linux/irq-entry-common.h:242 [inline] arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:81 [inline] el0_svc+0x17c/0x26c arch/arm64/kernel/entry-common.c:725 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 BTRFS info (device loop0): last unmount of filesystem c9fe44da-de57-406a-8241-57ec7d4412cf BTRFS info (device loop0): last unmount of filesystem 309ea6fa-c17c-4591-965d-0cfa5db77af7 BTRFS info (device loop0): last unmount of filesystem 34899641-b40e-4efd-b053-6c51aa369e0b BTRFS info (device loop0): last unmount of filesystem d5b4dbe3-3127-449f-ac4d-91ecd85ab21b BTRFS info (device loop0): last unmount of filesystem 036b69d5-c9a3-4c1a-9883-789d482cb15d BTRFS info (device loop0): last unmount of filesystem 4530b286-52b0-4a05-a51b-c02d982cc2e8