BTRFS info (device loop5): found 10 extents, stage: move data extents
BTRFS info (device loop5): found 1 extents, stage: update data pointers
BTRFS info (device loop5): balance: ended with status: 0
BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 1 PID: 8166 Comm: syz.5.333 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
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_nested+0x5c/0x78 kernel/locking/spinlock.c:378
 raw_spin_rq_lock_nested kernel/sched/core.c:537 [inline]
 raw_spin_rq_lock kernel/sched/sched.h:1355 [inline]
 rq_lock kernel/sched/sched.h:1645 [inline]
 __schedule+0x2b8/0x1b18 kernel/sched/core.c:6477
 preempt_schedule_common+0xec/0x1a0 kernel/sched/core.c:6730
 preempt_schedule+0x64/0x84 kernel/sched/core.c:6754
 percpu_counter_add_batch+0x228/0x29c lib/percpu_counter.c:97
 lock_extent_buffer_for_io+0x364/0x7d8 fs/btrfs/extent_io.c:2408
 submit_eb_page fs/btrfs/extent_io.c:2932 [inline]
 btree_write_cache_pages+0xd1c/0x14f8 fs/btrfs/extent_io.c:3004
 btree_writepages+0x6c/0x194 fs/btrfs/disk-io.c:822
 do_writepages+0x2c0/0x4fc mm/page-writeback.c:2491
 filemap_fdatawrite_wbc+0x124/0x174 mm/filemap.c:388
 __filemap_fdatawrite_range mm/filemap.c:421 [inline]
 filemap_fdatawrite_range+0xbc/0x10c mm/filemap.c:439
 btrfs_write_marked_extents+0x1b8/0x340 fs/btrfs/transaction.c:1100
 btrfs_write_and_wait_transaction+0xec/0x200 fs/btrfs/transaction.c:1212
 btrfs_commit_transaction+0x198c/0x29f0 fs/btrfs/transaction.c:2496
 del_balance_item fs/btrfs/volumes.c:3614 [inline]
 reset_balance_state+0x1cc/0x2a4 fs/btrfs/volumes.c:3678
 btrfs_balance+0xde4/0xe20 fs/btrfs/volumes.c:4511
 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