BTRFS info (device loop8): relocating block group 1048576 flags system
BTRFS info (device loop8): found 1 extents, stage: move data extents
BTRFS info (device loop8): balance: ended with status: 0
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 PID: 7685 Comm: syz.8.789 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
Call trace:
 dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 add_chain_cache kernel/locking/lockdep.c:-1 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3772 [inline]
 validate_chain kernel/locking/lockdep.c:3793 [inline]
 __lock_acquire+0x1810/0x6610 kernel/locking/lockdep.c:5049
 lock_acquire+0x20c/0x638 kernel/locking/lockdep.c:5662
 __mutex_lock_common+0x1a0/0x1f3c kernel/locking/mutex.c:603
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
 btrfs_commit_device_sizes+0xb4/0x298 fs/btrfs/volumes.c:8197
 btrfs_commit_transaction+0x1790/0x28e4 fs/btrfs/transaction.c:2480
 del_balance_item fs/btrfs/volumes.c:3614 [inline]
 reset_balance_state+0x1d8/0x2d4 fs/btrfs/volumes.c:3678
 btrfs_balance+0xd98/0xdd4 fs/btrfs/volumes.c:4517
 btrfs_ioctl_balance+0x3c8/0x600 fs/btrfs/ioctl.c:4537
 btrfs_ioctl+0x95c/0xb38 fs/btrfs/ioctl.c:5594
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585