BTRFS info (device loop2): relocating block group 5242880 flags data|metadata
BTRFS info (device loop2): found 7 extents, stage: move data extents
BTRFS info (device loop2): balance: ended with status: 0
BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 1 UID: 0 PID: 7933 Comm: syz.2.215 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_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x5c/0x7c kernel/locking/spinlock.c:162
 lock_extent_buffer_for_io+0x27c/0x694 fs/btrfs/extent_io.c:1845
 btree_write_cache_pages+0x810/0xe2c fs/btrfs/extent_io.c:2255
 btree_writepages+0x70/0x19c fs/btrfs/disk-io.c:512
 do_writepages+0x270/0x468 mm/page-writeback.c:2634
 filemap_fdatawrite_wbc mm/filemap.c:386 [inline]
 __filemap_fdatawrite_range mm/filemap.c:419 [inline]
 filemap_fdatawrite_range+0x154/0x1fc mm/filemap.c:437
 btrfs_write_marked_extents+0x174/0x28c fs/btrfs/transaction.c:1157
 btrfs_write_and_wait_transaction+0xdc/0x1e8 fs/btrfs/transaction.c:1264
 btrfs_commit_transaction+0x19fc/0x2ce4 fs/btrfs/transaction.c:2536
 del_balance_item fs/btrfs/volumes.c:3751 [inline]
 reset_balance_state+0x1cc/0x2c8 fs/btrfs/volumes.c:3815
 btrfs_balance+0xf1c/0xf58 fs/btrfs/volumes.c:4641
 btrfs_ioctl_balance+0x350/0x550 fs/btrfs/ioctl.c:3577
 btrfs_ioctl+0xb04/0xc3c fs/btrfs/ioctl.c:5298
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl fs/ioctl.c:584 [inline]
 __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:584
 __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:744
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596