BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 PID: 1643 Comm: kworker/u4:5 Not tainted 5.15.189-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+0x0/0x43c arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __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:3735 [inline]
 validate_chain kernel/locking/lockdep.c:3756 [inline]
 __lock_acquire+0x1b30/0x651c kernel/locking/lockdep.c:5012
 lock_acquire+0x1f4/0x620 kernel/locking/lockdep.c:5623
 fs_reclaim_acquire+0x118/0x1c4 mm/page_alloc.c:4597
 might_alloc include/linux/sched/mm.h:206 [inline]
 slab_pre_alloc_hook+0x38/0xec mm/slab.h:492
 slab_alloc_node mm/slub.c:3134 [inline]
 slab_alloc mm/slub.c:3228 [inline]
 kmem_cache_alloc+0x94/0x3e4 mm/slub.c:3233
 kmem_cache_zalloc include/linux/slab.h:725 [inline]
 __btrfs_add_free_space+0xcc/0xd44 fs/btrfs/free-space-cache.c:2485
 btrfs_add_free_space+0xf0/0x10c fs/btrfs/free-space-cache.c:2600
 unpin_extent_range+0x2e4/0xdf0 fs/btrfs/extent-tree.c:2738
 btrfs_finish_extent_commit+0x1e4/0x538 fs/btrfs/extent-tree.c:2829
 btrfs_commit_transaction+0x16bc/0x3044 fs/btrfs/transaction.c:2480
 btrfs_qgroup_rescan_worker+0x137c/0x13f8 fs/btrfs/qgroup.c:3348
 btrfs_work_helper+0x328/0x13a0 fs/btrfs/async-thread.c:325
 process_one_work+0x79c/0x1140 kernel/workqueue.c:2310
 worker_thread+0x8f4/0x101c kernel/workqueue.c:2457
 kthread+0x374/0x454 kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:855
BTRFS info (device loop5): qgroup scan completed (inconsistency flag cleared)