BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 PID: 7401 Comm: kworker/u4:13 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: btrfs-endio-write btrfs_work_helper
Call trace:
 dump_backtrace+0x1c0/0x1ec 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+0xf4/0x15c 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+0x1864/0x6800 kernel/locking/lockdep.c:5049
 lock_acquire+0x20c/0x63c kernel/locking/lockdep.c:5662
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x54/0x6c kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 __set_extent_bit+0x220/0x1964 fs/btrfs/extent-io-tree.c:982
 set_extent_bit+0x58/0x70 fs/btrfs/extent-io-tree.c:1171
 btrfs_init_new_buffer fs/btrfs/extent-tree.c:-1 [inline]
 btrfs_alloc_tree_block+0x924/0x1164 fs/btrfs/extent-tree.c:5039
 btrfs_force_cow_block+0x3ac/0x188c fs/btrfs/ctree.c:450
 btrfs_cow_block+0x2d0/0x708 fs/btrfs/ctree.c:623
 btrfs_search_slot+0xa50/0x237c fs/btrfs/ctree.c:-1
 btrfs_lookup_csum+0x12c/0x410 fs/btrfs/file-item.c:205
 btrfs_csum_file_blocks+0x1f4/0x1214 fs/btrfs/file-item.c:1019
 add_pending_csums fs/btrfs/inode.c:2796 [inline]
 btrfs_finish_ordered_io+0xaf8/0x1634 fs/btrfs/inode.c:3329
 finish_ordered_fn+0x20/0x30 fs/btrfs/ordered-data.c:287
 btrfs_work_helper+0x324/0xcb0 fs/btrfs/async-thread.c:280
 process_one_work+0x7f8/0x13a4 kernel/workqueue.c:2292
 worker_thread+0x8c4/0xfec kernel/workqueue.c:2439
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850