BTRFS info (device loop6): balance: start -d
BTRFS info (device loop6): relocating block group 13631488 flags data
BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 1 UID: 0 PID: 8808 Comm: syz.6.353 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 include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x48/0x60 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 __btrfs_run_delayed_refs+0x268/0x333c fs/btrfs/extent-tree.c:2045
 btrfs_run_delayed_refs+0xc4/0x38c fs/btrfs/extent-tree.c:2160
 btrfs_commit_transaction+0x218/0x2d30 fs/btrfs/transaction.c:2229
 prepare_to_relocate+0x308/0x3e0 fs/btrfs/relocation.c:3479
 relocate_block_group+0x110/0xb60 fs/btrfs/relocation.c:3504
 btrfs_relocate_block_group+0x650/0xac4 fs/btrfs/relocation.c:3966
 btrfs_relocate_chunk+0x108/0x54c fs/btrfs/volumes.c:3424
 __btrfs_balance+0x1334/0x1d1c fs/btrfs/volumes.c:4197
 btrfs_balance+0x8cc/0xf58 fs/btrfs/volumes.c:4571
 btrfs_ioctl_balance+0x350/0x550 fs/btrfs/ioctl.c:3525
 btrfs_ioctl+0xb04/0xc3c fs/btrfs/ioctl.c:5276
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:583
 __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
BTRFS info (device loop6): found 1 extents, stage: move data extents
BTRFS info (device loop6): found 1 extents, stage: update data pointers
BTRFS info (device loop6): balance: ended with status: 0