BTRFS info (device loop4): found 8 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
BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 0 PID: 8690 Comm: syz.4.1038 Not tainted 6.1.128-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 lookup_chain_cache_add kernel/locking/lockdep.c:3772 [inline]
 validate_chain kernel/locking/lockdep.c:3793 [inline]
 __lock_acquire+0x1b88/0x7680 kernel/locking/lockdep.c:5049
 lock_acquire+0x26c/0x7cc 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+0x2300/0x48c0 fs/btrfs/extent-tree.c:4455
 btrfs_reserve_extent+0x364/0x680 fs/btrfs/extent-tree.c:4604
 btrfs_alloc_tree_block+0x1b4/0x1478 fs/btrfs/extent-tree.c:5017
 btrfs_force_cow_block+0x3f0/0x1b48 fs/btrfs/ctree.c:443
 btrfs_cow_block+0x2e8/0x71c fs/btrfs/ctree.c:616
 btrfs_search_slot+0xb64/0x2928 fs/btrfs/ctree.c:2080
 del_balance_item fs/btrfs/volumes.c:3597 [inline]
 reset_balance_state+0x1a0/0x340 fs/btrfs/volumes.c:3672
 btrfs_balance+0xe04/0xe40 fs/btrfs/volumes.c:4505
 btrfs_ioctl_balance+0x3e4/0x778 fs/btrfs/ioctl.c:4531
 btrfs_ioctl+0x72c/0xb08 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+0x58/0x168 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