BTRFS info (device loop9): first mount of filesystem 7e32c2af-f87a-45a1-bcba-64dea7c56a53
BTRFS info (device loop9): using xxhash64 (xxhash64-generic) checksum algorithm
BTRFS info (device loop9): using free-space-tree
BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 8512 Comm: syz.9.247 Not tainted 6.16.0-rc5-syzkaller-gec4801305969 #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_nested+0x50/0x6c kernel/locking/spinlock.c:378
 raw_spin_rq_lock_nested kernel/sched/core.c:606 [inline]
 raw_spin_rq_lock kernel/sched/sched.h:1532 [inline]
 rq_lock kernel/sched/sched.h:1856 [inline]
 ttwu_queue kernel/sched/core.c:4017 [inline]
 try_to_wake_up+0x434/0xdf0 kernel/sched/core.c:4347
 wake_up_process+0x18/0x24 kernel/sched/core.c:4480
 kick_pool+0x3e0/0x58c kernel/workqueue.c:1279
 __queue_work+0xde4/0x1230 kernel/workqueue.c:2342
 queue_work_on+0xdc/0x18c kernel/workqueue.c:2392
 queue_work include/linux/workqueue.h:662 [inline]
 btrfs_queue_work+0x254/0x454 fs/btrfs/async-thread.c:351
 btrfs_cache_block_group+0x42c/0x668 fs/btrfs/block-group.c:957
 find_free_extent+0x3d10/0x4c00 fs/btrfs/extent-tree.c:4529
 btrfs_reserve_extent+0x228/0x4f0 fs/btrfs/extent-tree.c:4712
 btrfs_alloc_tree_block+0x180/0xeb0 fs/btrfs/extent-tree.c:5165
 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_insert_empty_items+0xa4/0x17c fs/btrfs/ctree.c:4287
 btrfs_create_new_inode+0x8f0/0x1710 fs/btrfs/inode.c:6515
 btrfs_create_common+0x144/0x208 fs/btrfs/inode.c:6750
 btrfs_mkdir+0xc4/0xec fs/btrfs/inode.c:6888
 vfs_mkdir+0x284/0x424 fs/namei.c:4375
 do_mkdirat+0x1f8/0x4c8 fs/namei.c:4408
 __do_sys_mkdirat fs/namei.c:4425 [inline]
 __se_sys_mkdirat fs/namei.c:4423 [inline]
 __arm64_sys_mkdirat+0x8c/0xa4 fs/namei.c:4423
 __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