BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 1 PID: 4570 Comm: kworker/u4:10 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Workqueue: btrfs-qgroup-rescan btrfs_work_helper
Call trace:
 dump_backtrace+0x1c8/0x1f4 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+0xf8/0x160 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+0x1b40/0x6544 kernel/locking/lockdep.c:5049
 lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662
 do_write_seqcount_begin_nested include/linux/seqlock.h:515 [inline]
 do_write_seqcount_begin include/linux/seqlock.h:541 [inline]
 psi_account_irqtime+0x32c/0x7c4 kernel/sched/psi.c:1035
 __schedule+0x794/0x1b18 kernel/sched/core.c:6555
 preempt_schedule_common+0xec/0x1a0 kernel/sched/core.c:6730
 preempt_schedule+0x64/0x84 kernel/sched/core.c:6754
 __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_unlock+0x80/0x84 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 btrfs_add_reserved_bytes+0x3f0/0x6b0 fs/btrfs/block-group.c:3568
 find_free_extent+0x2f9c/0x46b0 fs/btrfs/extent-tree.c:4501
 btrfs_reserve_extent+0x230/0x4fc fs/btrfs/extent-tree.c:4619
 btrfs_alloc_tree_block+0x190/0x1158 fs/btrfs/extent-tree.c:5032
 btrfs_force_cow_block+0x3a0/0x187c fs/btrfs/ctree.c:450
 btrfs_cow_block+0x2d0/0x710 fs/btrfs/ctree.c:623
 btrfs_search_slot+0xa54/0x2364 fs/btrfs/ctree.c:2087
 lookup_inline_extent_backref+0x28c/0xe78 fs/btrfs/extent-tree.c:847
 lookup_extent_backref fs/btrfs/extent-tree.c:1074 [inline]
 __btrfs_free_extent+0x21c/0x2320 fs/btrfs/extent-tree.c:2984
 run_delayed_tree_ref fs/btrfs/extent-tree.c:1696 [inline]
 run_one_delayed_ref fs/btrfs/extent-tree.c:1720 [inline]
 btrfs_run_delayed_refs_for_head fs/btrfs/extent-tree.c:1969 [inline]
 __btrfs_run_delayed_refs+0xba4/0x3280 fs/btrfs/extent-tree.c:2032
 btrfs_run_delayed_refs+0x124/0x47c fs/btrfs/extent-tree.c:2163
 commit_cowonly_roots+0x550/0x714 fs/btrfs/transaction.c:1327
 btrfs_commit_transaction+0x10bc/0x29f0 fs/btrfs/transaction.c:2427
 btrfs_qgroup_rescan_worker+0x1444/0x14b8 fs/btrfs/qgroup.c:3418
 btrfs_work_helper+0x30c/0xccc fs/btrfs/async-thread.c:280
 process_one_work+0x7f4/0x13a8 kernel/workqueue.c:2292
 worker_thread+0x8c8/0xfbc kernel/workqueue.c:2439
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850
BTRFS info (device loop2): qgroup scan completed (inconsistency flag cleared)