BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 8195 Comm: syz.4.438 Not tainted 6.16.0-rc6-syzkaller-gaaef6f251176 #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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:3858 [inline]
 validate_chain kernel/locking/lockdep.c:3879 [inline]
 __lock_acquire+0xf9c/0x30a4 kernel/locking/lockdep.c:5240
 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5871
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x5c/0x7c kernel/locking/spinlock.c:162
 __debug_check_no_obj_freed lib/debugobjects.c:1088 [inline]
 debug_check_no_obj_freed+0x148/0x470 lib/debugobjects.c:1129
 slab_free_hook mm/slub.c:2312 [inline]
 slab_free mm/slub.c:4643 [inline]
 kmem_cache_free+0x124/0x550 mm/slub.c:4745
 btrfs_free_extent_state+0x184/0x38c fs/btrfs/extent-io-tree.c:181
 merge_prev_state fs/btrfs/extent-io-tree.c:352 [inline]
 merge_state+0x1e0/0x420 fs/btrfs/extent-io-tree.c:385
 insert_state_fast+0x1f4/0x25c fs/btrfs/extent-io-tree.c:485
 set_extent_bit+0x1594/0x1cd0 fs/btrfs/extent-io-tree.c:1102
 btrfs_set_extent_bit+0x54/0x6c fs/btrfs/extent-io-tree.c:1296
 btrfs_init_new_buffer fs/btrfs/extent-tree.c:5121 [inline]
 btrfs_alloc_tree_block+0x76c/0xeb0 fs/btrfs/extent-tree.c:5170
 btrfs_force_cow_block+0x408/0x1bb8 fs/btrfs/ctree.c:506
 btrfs_cow_block+0x3f8/0x838 fs/btrfs/ctree.c:688
 btrfs_search_slot+0x9c0/0x221c fs/btrfs/ctree.c:2088
 btrfs_update_root+0xe4/0xa78 fs/btrfs/root-tree.c:144
 commit_fs_roots+0x440/0x784 fs/btrfs/transaction.c:1515
 btrfs_commit_transaction+0x1078/0x2b44 fs/btrfs/transaction.c:2440
 create_snapshot+0x4f4/0x834 fs/btrfs/ioctl.c:782
 btrfs_mksubvol+0x44c/0x59c fs/btrfs/ioctl.c:936
 btrfs_mksnapshot+0xc0/0x150 fs/btrfs/ioctl.c:980
 __btrfs_ioctl_snap_create+0x310/0x3f0 fs/btrfs/ioctl.c:1245
 btrfs_ioctl_snap_create+0x138/0x178 fs/btrfs/ioctl.c:1273
 btrfs_ioctl+0x4b0/0xc3c fs/btrfs/ioctl.c:-1
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl fs/ioctl.c:893 [inline]
 __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:893
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596