BTRFS info (device loop7): enabling free space tree
BTRFS info (device loop7): force clearing of disk cache
BTRFS info (device loop7): trying to use backup root at mount time
BTRFS info (device loop7): use zlib compression, level 3
BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 8669 Comm: syz.7.379 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
 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_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_unlock+0x74/0x78 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 xa_cmpxchg include/linux/xarray.h:700 [inline]
 xa_reserve include/linux/xarray.h:1088 [inline]
 add_delayed_ref+0x220/0x1a30 fs/btrfs/delayed-ref.c:1042
 btrfs_add_delayed_tree_ref+0x94/0x148 fs/btrfs/delayed-ref.c:1117
 btrfs_free_tree_block+0x290/0x9a8 fs/btrfs/extent-tree.c:3456
 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_update_root+0xe4/0xcd8 fs/btrfs/root-tree.c:144
 commit_fs_roots+0x490/0x8dc fs/btrfs/transaction.c:1531
 btrfs_commit_transaction+0x10a4/0x2d30 fs/btrfs/transaction.c:2460
 btrfs_sync_file+0xa64/0xf78 fs/btrfs/file.c:1819
 vfs_fsync_range+0x160/0x19c fs/sync.c:188
 generic_write_sync include/linux/fs.h:2616 [inline]
 btrfs_do_write_iter+0x4a4/0x610 fs/btrfs/file.c:1470
 btrfs_file_write_iter+0x2c/0x3c fs/btrfs/file.c:1480
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x540/0xa3c fs/read_write.c:686
 ksys_write+0x120/0x210 fs/read_write.c:738
 __do_sys_write fs/read_write.c:749 [inline]
 __se_sys_write fs/read_write.c:746 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:746
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596