BTRFS info (device loop6): enabling ssd optimizations
BTRFS info (device loop6): enabling free space tree
BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 1 UID: 0 PID: 8491 Comm: syz.6.269 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
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+0x14c/0x2e0 kernel/locking/lockdep.c:5868
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x48/0x60 kernel/locking/spinlock.c:154
 class_raw_spinlock_constructor include/linux/spinlock.h:535 [inline]
 pcpu_alloc+0x2b4/0x4bc lib/debugobjects.c:281
 alloc_object+0xd0/0x2f4 lib/debugobjects.c:458
 lookup_object_or_alloc lib/debugobjects.c:685 [inline]
 debug_object_activate+0x140/0x460 lib/debugobjects.c:820
 debug_rcu_head_queue kernel/rcu/rcu.h:236 [inline]
 __call_rcu_common kernel/rcu/tree.c:3108 [inline]
 call_rcu+0x54/0x978 kernel/rcu/tree.c:3243
 xa_node_free lib/xarray.c:260 [inline]
 xas_delete_node lib/xarray.c:503 [inline]
 update_node lib/xarray.c:767 [inline]
 xas_store+0xaa4/0x13d0 lib/xarray.c:852
 __xa_erase lib/xarray.c:1649 [inline]
 xa_erase+0x64/0xd8 lib/xarray.c:1670
 btrfs_delete_ref_head+0x12c/0x2a0 fs/btrfs/delayed-ref.c:542
 cleanup_ref_head fs/btrfs/extent-tree.c:1888 [inline]
 __btrfs_run_delayed_refs+0x2728/0x377c fs/btrfs/extent-tree.c:2059
 btrfs_run_delayed_refs+0x158/0x38c fs/btrfs/extent-tree.c:2159
 commit_cowonly_roots+0x524/0x6fc fs/btrfs/transaction.c:1378
 btrfs_commit_transaction+0x10d0/0x2ce4 fs/btrfs/transaction.c:2459
 btrfs_commit_current_transaction+0xac/0xdc fs/btrfs/transaction.c:2010
 try_flush_qgroup+0x154/0x330 fs/btrfs/qgroup.c:4189
 __btrfs_qgroup_reserve_meta+0x68/0xc4 fs/btrfs/qgroup.c:4491
 btrfs_qgroup_reserve_meta_prealloc fs/btrfs/qgroup.h:412 [inline]
 start_transaction+0x278/0x155c fs/btrfs/transaction.c:635
 btrfs_start_transaction+0x34/0x44 fs/btrfs/transaction.c:816
 btrfs_create_common+0x120/0x208 fs/btrfs/inode.c:6784
 btrfs_mkdir+0xc4/0xec fs/btrfs/inode.c:6927
 vfs_mkdir+0x284/0x424 fs/namei.c:4453
 ovl_do_mkdir fs/overlayfs/overlayfs.h:251 [inline]
 ovl_workdir_create+0x3a0/0x6f4 fs/overlayfs/super.c:340
 ovl_make_workdir fs/overlayfs/super.c:679 [inline]
 ovl_get_workdir+0x2b4/0x1270 fs/overlayfs/super.c:837
 ovl_fill_super+0x10d8/0x3118 fs/overlayfs/super.c:1468
 vfs_get_super fs/super.c:1324 [inline]
 get_tree_nodev+0xb4/0x144 fs/super.c:1343
 ovl_get_tree+0x28/0x38 fs/overlayfs/params.c:708
 vfs_get_tree+0x90/0x28c fs/super.c:1751
 fc_mount fs/namespace.c:1208 [inline]
 do_new_mount_fc fs/namespace.c:3651 [inline]
 do_new_mount+0x284/0x944 fs/namespace.c:3727
 path_mount+0x5b4/0xdfc fs/namespace.c:4037
 do_mount fs/namespace.c:4050 [inline]
 __do_sys_mount fs/namespace.c:4238 [inline]
 __se_sys_mount fs/namespace.c:4215 [inline]
 __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4215
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:746
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:765
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596