BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 7238 Comm: syz-executor Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
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
 add_chain_cache kernel/locking/lockdep.c:-1 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3855 [inline]
 validate_chain kernel/locking/lockdep.c:3876 [inline]
 __lock_acquire+0xf9c/0x30a4 kernel/locking/lockdep.c:5237
 lock_acquire+0x140/0x2e0 kernel/locking/lockdep.c:5868
 _raw_spin_lock_nested+0x50/0x6c kernel/locking/spinlock.c:378
 raw_spin_rq_lock_nested kernel/sched/core.c:639 [inline]
 raw_spin_rq_lock kernel/sched/sched.h:1558 [inline]
 rq_lock kernel/sched/sched.h:1885 [inline]
 __schedule+0x370/0x2a7c kernel/sched/core.c:6768
 preempt_schedule_common+0xe0/0x194 kernel/sched/core.c:7047
 preempt_schedule+0x60/0x80 kernel/sched/core.c:7071
 __raw_read_unlock include/linux/rwlock_api_smp.h:233 [inline]
 _raw_read_unlock+0x74/0x78 kernel/locking/spinlock.c:260
 block_group_cache_tree_search+0x208/0x26c fs/btrfs/block-group.c:262
 btrfs_lookup_block_group+0x2c/0x3c fs/btrfs/block-group.c:282
 btrfs_free_tree_block+0x3d0/0x9a8 fs/btrfs/extent-tree.c:3473
 btrfs_force_cow_block+0xc10/0x2058 fs/btrfs/ctree.c:566
 btrfs_cow_block+0x328/0x940 fs/btrfs/ctree.c:708
 btrfs_search_slot+0x96c/0x2228 fs/btrfs/ctree.c:2130
 btrfs_search_prev_slot fs/btrfs/free-space-tree.c:136 [inline]
 add_free_space_extent+0x22c/0xa18 fs/btrfs/free-space-tree.c:909
 __btrfs_add_to_free_space_tree+0x190/0x234 fs/btrfs/free-space-tree.c:1010
 btrfs_add_to_free_space_tree+0x11c/0x564 fs/btrfs/free-space-tree.c:1039
 do_free_extent_accounting fs/btrfs/extent-tree.c:3002 [inline]
 __btrfs_free_extent+0x1000/0x39bc fs/btrfs/extent-tree.c:3364
 run_delayed_tree_ref fs/btrfs/extent-tree.c:1750 [inline]
 run_one_delayed_ref fs/btrfs/extent-tree.c:1776 [inline]
 btrfs_run_delayed_refs_for_head fs/btrfs/extent-tree.c:1973 [inline]
 __btrfs_run_delayed_refs+0xb98/0x333c fs/btrfs/extent-tree.c:2048
 btrfs_run_delayed_refs+0xc4/0x38c fs/btrfs/extent-tree.c:2160
 btrfs_commit_transaction+0x218/0x2d30 fs/btrfs/transaction.c:2229
 btrfs_sync_fs+0x4ec/0x9a4 fs/btrfs/super.c:1053
 sync_filesystem+0x1a0/0x218 fs/sync.c:66
 generic_shutdown_super+0x70/0x2b8 fs/super.c:622
 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 loop7): last unmount of filesystem c6b85f58-0c7e-41ca-a553-c8d9f94f6663