BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! turning off the locking correctness validator. CPU: 1 UID: 0 PID: 1062 Comm: kworker/u8:7 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Workqueue: btrfs-qgroup-rescan btrfs_work_helper 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 __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_assert_init+0xa0/0x2c8 lib/debugobjects.c:1007 debug_timer_assert_init kernel/time/timer.c:803 [inline] debug_assert_init kernel/time/timer.c:848 [inline] __mod_timer+0x5c/0xd00 kernel/time/timer.c:1025 add_timer_global+0x88/0xc0 kernel/time/timer.c:1283 __queue_delayed_work+0x218/0x2c8 kernel/workqueue.c:2524 queue_delayed_work_on+0xe4/0x194 kernel/workqueue.c:2559 queue_delayed_work include/linux/workqueue.h:684 [inline] wb_wakeup_delayed+0xc8/0x10c fs/fs-writeback.c:165 __mark_inode_dirty+0x658/0x1090 fs/fs-writeback.c:2619 filemap_dirty_folio+0x114/0x19c mm/page-writeback.c:2776 folio_mark_dirty+0xf0/0x154 mm/page-writeback.c:2849 btrfs_meta_folio_set_dirty+0xcc/0x11c fs/btrfs/subpage.c:664 set_extent_buffer_dirty+0x2a0/0x6e8 fs/btrfs/extent_io.c:3677 btrfs_mark_buffer_dirty+0x118/0x338 fs/btrfs/disk-io.c:4455 btrfs_force_cow_block+0xd20/0x2044 fs/btrfs/ctree.c:606 btrfs_cow_block+0x3d4/0x934 fs/btrfs/ctree.c:699 btrfs_search_slot+0x9ec/0x2268 fs/btrfs/ctree.c:2097 update_qgroup_info_item fs/btrfs/qgroup.c:882 [inline] btrfs_run_qgroups+0x2f8/0x650 fs/btrfs/qgroup.c:3110 commit_cowonly_roots+0x1b4/0x6fc fs/btrfs/transaction.c:1354 btrfs_commit_transaction+0x10d0/0x2ce4 fs/btrfs/transaction.c:2462 btrfs_qgroup_rescan_worker+0x12c8/0x19f8 fs/btrfs/qgroup.c:3832 btrfs_work_helper+0x380/0xca8 fs/btrfs/async-thread.c:312 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844