NILFS (loop4): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 PID: 28035 Comm: segctord Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __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:3735 [inline]
 validate_chain kernel/locking/lockdep.c:3756 [inline]
 __lock_acquire+0x1b30/0x651c kernel/locking/lockdep.c:5012
 lock_acquire+0x1f4/0x620 kernel/locking/lockdep.c:5623
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0xb0/0x10c kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:363 [inline]
 __mark_inode_dirty+0x3a8/0x1070 fs/fs-writeback.c:2489
 mark_buffer_dirty+0x2a4/0x52c fs/buffer.c:1112
 nilfs_btree_propagate_p fs/nilfs2/btree.c:1913 [inline]
 nilfs_btree_propagate+0x2e4/0xab8 fs/nilfs2/btree.c:2111
 nilfs_bmap_propagate+0x74/0x124 fs/nilfs2/bmap.c:345
 nilfs_collect_dat_data+0x54/0xe8 fs/nilfs2/segment.c:644
 nilfs_segctor_apply_buffers+0x170/0x31c fs/nilfs2/segment.c:1049
 nilfs_segctor_scan_file+0x20c/0xc64 fs/nilfs2/segment.c:1088
 nilfs_segctor_collect_blocks fs/nilfs2/segment.c:1264 [inline]
 nilfs_segctor_collect fs/nilfs2/segment.c:1534 [inline]
 nilfs_segctor_do_construct+0x1ab4/0x62cc fs/nilfs2/segment.c:2090
 nilfs_segctor_construct+0x134/0x540 fs/nilfs2/segment.c:2455
 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2563 [inline]
 nilfs_segctor_thread+0x804/0xe08 fs/nilfs2/segment.c:2647
 kthread+0x374/0x454 kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:855