BTRFS info (device loop0): balance: resume -dusage=90 -musage=90
BTRFS info (device loop0): relocating block group 8519680 flags data|metadata
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 8391 Comm: syz.0.299 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
 spin_lock include/linux/spinlock.h:351 [inline]
 btrfs_reduce_alloc_profile fs/btrfs/block-group.c:96 [inline]
 btrfs_get_alloc_profile+0x310/0xab0 fs/btrfs/block-group.c:151
 get_alloc_profile_by_root fs/btrfs/extent-tree.c:2570 [inline]
 btrfs_reserve_extent+0x19c/0x624 fs/btrfs/extent-tree.c:4701
 btrfs_alloc_tree_block+0x178/0xe5c fs/btrfs/extent-tree.c:5168
 btrfs_force_cow_block+0x404/0x2044 fs/btrfs/ctree.c:517
 btrfs_cow_block+0x3d4/0x934 fs/btrfs/ctree.c:699
 btrfs_search_slot+0x9ec/0x2268 fs/btrfs/ctree.c:2097
 btrfs_update_root+0xe4/0xd90 fs/btrfs/root-tree.c:144
 update_cowonly_root fs/btrfs/transaction.c:1306 [inline]
 commit_cowonly_roots+0x480/0x6fc fs/btrfs/transaction.c:1372
 btrfs_commit_transaction+0x10d0/0x2ce4 fs/btrfs/transaction.c:2462
 prepare_to_relocate+0x308/0x3e0 fs/btrfs/relocation.c:3500
 relocate_block_group+0x110/0xb64 fs/btrfs/relocation.c:3525
 btrfs_relocate_block_group+0x654/0xacc fs/btrfs/relocation.c:3997
 btrfs_relocate_chunk+0x108/0x54c fs/btrfs/volumes.c:3451
 __btrfs_balance+0x1358/0x1d30 fs/btrfs/volumes.c:4227
 btrfs_balance+0x8cc/0xf58 fs/btrfs/volumes.c:4604
 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+0x98/0x2b8 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
BTRFS info (device loop0): relocating block group 5242880 flags data|metadata
BTRFS info (device loop0): found 6 extents, stage: move data extents
BTRFS info (device loop0): found 1 extents, stage: update data pointers
BTRFS info (device loop0): balance: ended with status: 0