BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 PID: 7361 Comm: kworker/u4:16 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
 down_read+0xc0/0x390 kernel/locking/rwsem.c:1498
 find_free_extent+0xc98/0x316c fs/btrfs/extent-tree.c:4291
 btrfs_reserve_extent+0x194/0x428 fs/btrfs/extent-tree.c:4498
 btrfs_alloc_tree_block+0x1a8/0x112c fs/btrfs/extent-tree.c:4916
 btrfs_force_cow_block+0x3a8/0x1700 fs/btrfs/ctree.c:425
 btrfs_cow_block+0x2d8/0x66c fs/btrfs/ctree.c:598
 btrfs_search_slot+0xa10/0x1f4c fs/btrfs/ctree.c:1858
 btrfs_update_root+0xcc/0x954 fs/btrfs/root-tree.c:134
 commit_fs_roots+0x36c/0x4e8 fs/btrfs/transaction.c:1448
 btrfs_commit_transaction+0xe4c/0x3044 fs/btrfs/transaction.c:2371
 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 loop7): qgroup scan completed (inconsistency flag cleared)