btrfs: Deprecated parameter 'usebackuproot'
BTRFS warning: 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead
BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop1 (7:1) scanned by syz.1.1891 (24609)
BUG: MAX_LOCKDEP_KEYS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 24609 Comm: syz.1.1891 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+0x14c/0x2e0 kernel/locking/lockdep.c:5868
 touch_wq_lockdep_map+0xa8/0x164 kernel/workqueue.c:3936
 __flush_workqueue+0xfc/0x109c kernel/workqueue.c:3978
 btrfs_flush_workqueue+0x3c/0x4c fs/btrfs/async-thread.c:371
 close_ctree+0x354/0x113c fs/btrfs/disk-io.c:4325
 btrfs_put_super+0x1ac/0x1c0 fs/btrfs/super.c:74
 generic_shutdown_super+0x12c/0x2b8 fs/super.c:642
 kill_anon_super+0x4c/0x7c fs/super.c:1281
 btrfs_kill_super+0x40/0x58 fs/btrfs/super.c:2134
 deactivate_locked_super+0xc4/0x12c fs/super.c:473
 deactivate_super+0xe0/0x100 fs/super.c:506
 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1327
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1334
 task_work_run+0x1dc/0x260 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xfc/0x178 kernel/entry/common.c:43
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:103 [inline]
 el0_svc+0x170/0x254 arch/arm64/kernel/entry-common.c:747
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:765
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596