BTRFS info (device loop8): enabling free space tree
BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 1 UID: 0 PID: 8380 Comm: syz.8.327 Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
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:3855 [inline]
 validate_chain kernel/locking/lockdep.c:3876 [inline]
 __lock_acquire+0xf9c/0x30a4 kernel/locking/lockdep.c:5237
 lock_acquire+0x140/0x2e0 kernel/locking/lockdep.c:5868
 fs_reclaim_acquire+0xb8/0x118 mm/page_alloc.c:4318
 might_alloc include/linux/sched/mm.h:317 [inline]
 slab_pre_alloc_hook mm/slub.c:4904 [inline]
 slab_alloc_node mm/slub.c:5239 [inline]
 __kmalloc_cache_noprof+0x58/0x698 mm/slub.c:5771
 kmalloc_noprof include/linux/slab.h:957 [inline]
 kzalloc_noprof include/linux/slab.h:1094 [inline]
 btrfs_cache_block_group+0xc0/0x66c fs/btrfs/block-group.c:936
 find_free_extent+0x3218/0x4f14 fs/btrfs/extent-tree.c:4522
 btrfs_reserve_extent+0x210/0x600 fs/btrfs/extent-tree.c:4705
 btrfs_alloc_tree_block+0x168/0xe38 fs/btrfs/extent-tree.c:5157
 btrfs_force_cow_block+0x404/0x2058 fs/btrfs/ctree.c:517
 btrfs_cow_block+0x328/0x940 fs/btrfs/ctree.c:708
 btrfs_search_slot+0x96c/0x2228 fs/btrfs/ctree.c:2130
 lookup_inline_extent_backref+0x2c4/0x143c fs/btrfs/extent-tree.c:806
 lookup_extent_backref fs/btrfs/extent-tree.c:1058 [inline]
 __btrfs_free_extent+0x374/0x39bc fs/btrfs/extent-tree.c:3129
 run_delayed_tree_ref fs/btrfs/extent-tree.c:1750 [inline]
 run_one_delayed_ref fs/btrfs/extent-tree.c:1776 [inline]
 btrfs_run_delayed_refs_for_head fs/btrfs/extent-tree.c:1973 [inline]
 __btrfs_run_delayed_refs+0xb98/0x333c fs/btrfs/extent-tree.c:2048
 btrfs_run_delayed_refs+0xc4/0x38c fs/btrfs/extent-tree.c:2160
 btrfs_commit_transaction+0x218/0x2d30 fs/btrfs/transaction.c:2229
 btrfs_ioctl_subvol_setflags+0x398/0x610 fs/btrfs/ioctl.c:1422
 btrfs_ioctl+0x990/0xc3c fs/btrfs/ioctl.c:5218
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:583
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596