BTRFS info (device loop4): relocating block group 6881280 flags data|metadata
BTRFS info (device loop4): relocating block group 5242880 flags data|metadata
BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 0 PID: 12483 Comm: syz.4.1453 Not tainted 6.1.138-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call trace:
 dump_backtrace+0x1c8/0x1f4 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+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:3772 [inline]
 validate_chain kernel/locking/lockdep.c:3793 [inline]
 __lock_acquire+0x1b40/0x6544 kernel/locking/lockdep.c:5049
 lock_acquire+0x20c/0x644 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]
 find_free_extent_unclustered fs/btrfs/extent-tree.c:3663 [inline]
 do_allocation_clustered fs/btrfs/extent-tree.c:3716 [inline]
 do_allocation fs/btrfs/extent-tree.c:3916 [inline]
 find_free_extent+0x1f7c/0x46b0 fs/btrfs/extent-tree.c:4455
 btrfs_reserve_extent+0x230/0x4fc fs/btrfs/extent-tree.c:4604
 btrfs_alloc_tree_block+0x190/0x1158 fs/btrfs/extent-tree.c:5017
 btrfs_force_cow_block+0x3a0/0x187c fs/btrfs/ctree.c:443
 btrfs_cow_block+0x2d0/0x710 fs/btrfs/ctree.c:616
 btrfs_search_slot+0xa54/0x2364 fs/btrfs/ctree.c:2080
 btrfs_insert_empty_items+0xa4/0x178 fs/btrfs/ctree.c:4178
 btrfs_insert_empty_item fs/btrfs/ctree.h:3137 [inline]
 btrfs_uuid_tree_add+0x408/0x750 fs/btrfs/uuid-tree.c:112
 create_pending_snapshot+0xb1c/0x207c fs/btrfs/transaction.c:1860
 create_pending_snapshots+0x150/0x198 fs/btrfs/transaction.c:1906
 btrfs_commit_transaction+0xf70/0x29f0 fs/btrfs/transaction.c:2374
 prepare_to_relocate+0x308/0x3e4 fs/btrfs/relocation.c:3606
 relocate_block_group+0xf8/0xa34 fs/btrfs/relocation.c:3631
 btrfs_relocate_block_group+0x664/0x970 fs/btrfs/relocation.c:4094
 btrfs_relocate_chunk+0x104/0x364 fs/btrfs/volumes.c:3344
 __btrfs_balance+0x1390/0x1af8 fs/btrfs/volumes.c:4092
 btrfs_balance+0xa44/0xe20 fs/btrfs/volumes.c:4468
 btrfs_ioctl_balance+0x3c0/0x5f8 fs/btrfs/ioctl.c:4531
 btrfs_ioctl+0xac4/0xbd0 fs/btrfs/ioctl.c:5570
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:856
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
BTRFS info (device loop4): found 7 extents, stage: move data extents
BTRFS info (device loop4): found 1 extents, stage: update data pointers
BTRFS info (device loop4): balance: ended with status: 0