BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! turning off the locking correctness validator. CPU: 1 UID: 0 PID: 783 Comm: kworker/u8:10 Not tainted 6.15.0-rc4-syzkaller-ge0f4c8dd9d2d #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: events_unbound btrfs_async_reclaim_metadata_space 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 do_write_seqcount_begin_nested include/linux/seqlock.h:477 [inline] do_write_seqcount_begin include/linux/seqlock.h:503 [inline] psi_group_change+0x23c/0x12e4 kernel/sched/psi.c:792 psi_task_change+0xec/0x244 kernel/sched/psi.c:912 psi_enqueue kernel/sched/stats.h:166 [inline] enqueue_task+0x250/0x2f4 kernel/sched/core.c:2082 activate_task kernel/sched/core.c:2122 [inline] ttwu_do_activate+0x19c/0x778 kernel/sched/core.c:3732 ttwu_queue kernel/sched/core.c:4000 [inline] try_to_wake_up+0x4b8/0xdf0 kernel/sched/core.c:4328 wake_up_process+0x18/0x24 kernel/sched/core.c:4461 kick_pool+0x3e0/0x58c kernel/workqueue.c:1279 __queue_work+0xde4/0x1230 kernel/workqueue.c:2342 queue_work_on+0xdc/0x18c kernel/workqueue.c:2392 queue_work include/linux/workqueue.h:662 [inline] btrfs_queue_work+0x254/0x454 fs/btrfs/async-thread.c:352 btrfs_cache_block_group+0x42c/0x668 fs/btrfs/block-group.c:959 find_free_extent+0x3a78/0x4948 fs/btrfs/extent-tree.c:4492 btrfs_reserve_extent+0x228/0x4f0 fs/btrfs/extent-tree.c:4674 btrfs_alloc_tree_block+0x180/0xeb0 fs/btrfs/extent-tree.c:5127 btrfs_force_cow_block+0x408/0x1bb8 fs/btrfs/ctree.c:506 btrfs_cow_block+0x3f8/0x838 fs/btrfs/ctree.c:688 btrfs_search_slot+0x9c0/0x21f0 fs/btrfs/ctree.c:2088 btrfs_update_device+0x118/0x3f4 fs/btrfs/volumes.c:3039 btrfs_chunk_alloc_add_chunk_item+0x244/0xe14 fs/btrfs/volumes.c:5767 do_chunk_alloc fs/btrfs/block-group.c:3926 [inline] btrfs_chunk_alloc+0x8b8/0x1200 fs/btrfs/block-group.c:4214 flush_space+0x2f0/0xb64 fs/btrfs/space-info.c:815 btrfs_async_reclaim_metadata_space+0x32c/0x75c fs/btrfs/space-info.c:1120 process_one_work+0x7e8/0x156c kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862