BTRFS info (device loop1): disabling free space tree
BTRFS info (device loop1): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1)
BTRFS info (device loop1): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2)
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 9363 Comm: syz.1.667 Not tainted 6.15.0-rc6-syzkaller-ga82e92598ab1 #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (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:3856 [inline]
 validate_chain kernel/locking/lockdep.c:3877 [inline]
 __lock_acquire+0xf50/0x3058 kernel/locking/lockdep.c:5235
 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5866
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x5c/0x7c kernel/locking/spinlock.c:162
 debug_object_activate+0x7c/0x460 lib/debugobjects.c:818
 debug_work_activate kernel/workqueue.c:664 [inline]
 insert_work+0x4c/0x2cc kernel/workqueue.c:2180
 __queue_work+0xdd8/0x1230 kernel/workqueue.c:2341
 queue_work_on+0xdc/0x18c kernel/workqueue.c:2392
 queue_work include/linux/workqueue.h:662 [inline]
 loop_queue_work drivers/block/loop.c:849 [inline]
 loop_queue_rq+0x944/0xaa8 drivers/block/loop.c:1857
 __blk_mq_issue_directly block/blk-mq.c:2691 [inline]
 blk_mq_request_issue_directly+0x2c0/0x560 block/blk-mq.c:2778
 blk_mq_plug_issue_direct+0x254/0x558 block/blk-mq.c:2799
 blk_mq_flush_plug_list+0x638/0x1278 block/blk-mq.c:2910
 __blk_flush_plug+0x330/0x408 block/blk-core.c:1220
 blk_finish_plug block/blk-core.c:1247 [inline]
 __submit_bio+0x3f4/0x4d8 block/blk-core.c:649
 __submit_bio_noacct_mq block/blk-core.c:722 [inline]
 submit_bio_noacct_nocheck+0x390/0xaac block/blk-core.c:751
 submit_bio_noacct+0xc84/0x176c block/blk-core.c:874
 submit_bio+0x354/0x4d4 block/blk-core.c:916
 write_dev_supers fs/btrfs/disk-io.c:3881 [inline]
 write_all_supers+0x21f4/0x39ac fs/btrfs/disk-io.c:4151
 btrfs_commit_transaction+0x19b0/0x2a50 fs/btrfs/transaction.c:2541
 insert_balance_item+0x850/0x115c fs/btrfs/volumes.c:3682
 btrfs_balance+0x838/0xe30 fs/btrfs/volumes.c:4558
 btrfs_ioctl_balance+0x350/0x550 fs/btrfs/ioctl.c:3586
 btrfs_ioctl+0xb04/0xc38 fs/btrfs/ioctl.c:5306
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl fs/ioctl.c:892 [inline]
 __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:892
 __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+0x58/0x17c arch/arm64/kernel/entry-common.c:767
 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
BTRFS info (device loop1): balance: start -d -m
BTRFS info (device loop1): relocating block group 6881280 flags data|metadata
BTRFS info (device loop1): relocating block group 5242880 flags data|metadata
BTRFS info (device loop1): found 9 extents, stage: move data extents
BTRFS info (device loop1): found 1 extents, stage: update data pointers
BTRFS info (device loop1): balance: ended with status: 0