NILFS (loop8): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 7707 Comm: segctord Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
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
 seqcount_lockdep_reader_access include/linux/seqlock.h:102 [inline]
 read_mems_allowed_begin include/linux/cpuset.h:153 [inline]
 get_any_partial mm/slub.c:2292 [inline]
 get_partial mm/slub.c:2334 [inline]
 ___slab_alloc+0x82c/0xec8 mm/slub.c:3131
 __slab_alloc+0x74/0xd0 mm/slub.c:3240
 slab_alloc_node mm/slub.c:3325 [inline]
 slab_alloc mm/slub.c:3367 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3374 [inline]
 kmem_cache_alloc+0x2a0/0x318 mm/slub.c:3383
 nilfs_btree_alloc_path+0x4c/0x40c fs/nilfs2/btree.c:28
 nilfs_btree_assign+0x8c/0x928 fs/nilfs2/btree.c:2279
 nilfs_bmap_assign+0x88/0x13c fs/nilfs2/bmap.c:390
 nilfs_segctor_update_payload_blocknr fs/nilfs2/segment.c:1627 [inline]
 nilfs_segctor_assign fs/nilfs2/segment.c:1661 [inline]
 nilfs_segctor_do_construct+0x2b90/0x6134 fs/nilfs2/segment.c:2101
 nilfs_segctor_construct+0x134/0x540 fs/nilfs2/segment.c:2453
 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2561 [inline]
 nilfs_segctor_thread+0x7b8/0xd1c fs/nilfs2/segment.c:2645
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850