BTRFS info (device loop2): balance: start -d -m
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 UID: 0 PID: 8583 Comm: syz.2.366 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
 seqcount_lockdep_reader_access+0xbc/0x104 include/linux/seqlock.h:72
 ktime_get+0x64/0x214 kernel/time/timekeeping.c:824
 hrtimer_cb_get_time include/linux/hrtimer.h:164 [inline]
 start_dl_timer+0x1b8/0x428 kernel/sched/deadline.c:1105
 update_curr_dl_se+0x364/0x5f4 kernel/sched/deadline.c:1498
 dl_server_update+0x84/0xb0 kernel/sched/deadline.c:1584
 update_curr+0x338/0x600 kernel/sched/fair.c:1243
 enqueue_entity+0x70/0x9ec kernel/sched/fair.c:5253
 enqueue_task_fair+0x774/0x104c kernel/sched/fair.c:6876
 enqueue_task+0x7c/0x2f4 kernel/sched/core.c:2090
 activate_task kernel/sched/core.c:2132 [inline]
 ttwu_do_activate+0x1a4/0x764 kernel/sched/core.c:3741
 ttwu_queue kernel/sched/core.c:4004 [inline]
 try_to_wake_up+0x4c4/0xe24 kernel/sched/core.c:4328
 wake_up_process kernel/sched/core.c:4459 [inline]
 wake_up_q+0xa4/0x11c kernel/sched/core.c:1084
 raw_spin_unlock_irqrestore_wake include/linux/sched/wake_q.h:96 [inline]
 __mutex_unlock_slowpath+0x3f4/0x6c8 kernel/locking/mutex.c:965
 mutex_unlock+0x18/0x24 kernel/locking/mutex.c:536
 btrfs_balance+0x8c4/0xf58 fs/btrfs/volumes.c:4602
 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 loop2): relocating block group 6881280 flags data|metadata
BTRFS info (device loop2): balance: paused