loop5: detected capacity change from 0 to 8192
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 PID: 7280 Comm: syz.5.504 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_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x6c/0xb4 kernel/locking/spinlock.c:162
 __stack_depot_save+0x1c4/0x4b8 lib/stackdepot.c:479
 kasan_save_stack+0x58/0x70 mm/kasan/common.c:46
 __kasan_record_aux_stack+0xc0/0xdc mm/kasan/generic.c:486
 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496
 insert_work+0x64/0x37c kernel/workqueue.c:1361
 __queue_work+0xcbc/0x123c kernel/workqueue.c:1520
 queue_work_on+0xc0/0x16c kernel/workqueue.c:1548
 queue_work include/linux/workqueue.h:512 [inline]
 loop_queue_work drivers/block/loop.c:893 [inline]
 loop_queue_rq+0x94c/0xa80 drivers/block/loop.c:1874
 __blk_mq_issue_directly block/blk-mq.c:2631 [inline]
 __blk_mq_try_issue_directly+0x410/0x67c block/blk-mq.c:2684
 blk_mq_try_issue_directly+0x3c/0x1d8 block/blk-mq.c:2708
 blk_mq_submit_bio+0xf88/0x1a48 block/blk-mq.c:3045
 __submit_bio+0x1d8/0x260 block/blk-core.c:591
 __submit_bio_noacct_mq block/blk-core.c:668 [inline]
 submit_bio_noacct_nocheck+0x67c/0x9ec block/blk-core.c:697
 submit_bio_noacct+0xcdc/0x16e0 block/blk-core.c:808
 submit_bio+0x29c/0x3d0 block/blk-core.c:853
 mpage_bio_submit fs/mpage.c:64 [inline]
 do_mpage_readpage+0x14e4/0x16ac fs/mpage.c:294
 mpage_read_folio+0xa8/0x140 fs/mpage.c:379
 nilfs_read_folio+0x28/0x38 fs/nilfs2/inode.c:150
 filemap_read_folio+0x130/0x37c mm/filemap.c:2490
 do_read_cache_folio+0x24c/0x544 mm/filemap.c:3627
 do_read_cache_page mm/filemap.c:3669 [inline]
 read_cache_page+0x6c/0x184 mm/filemap.c:3678
 read_mapping_page include/linux/pagemap.h:791 [inline]
 nilfs_get_page+0x5c/0x1a0 fs/nilfs2/dir.c:193
 nilfs_find_entry+0x13c/0x7a0 fs/nilfs2/dir.c:355
 nilfs_inode_by_name+0x4c/0x250 fs/nilfs2/dir.c:437
 nilfs_lookup+0xc4/0x1f8 fs/nilfs2/namei.c:63
 __lookup_slow+0x24c/0x370 fs/namei.c:1690
 lookup_slow+0x5c/0x80 fs/namei.c:1707
 walk_component+0x270/0x364 fs/namei.c:1998
 lookup_last fs/namei.c:2455 [inline]
 path_lookupat+0x13c/0x3d0 fs/namei.c:2479
 filename_lookup+0x190/0x42c fs/namei.c:2508
 user_path_at_empty+0x5c/0x84 fs/namei.c:2905
 user_path_at include/linux/namei.h:57 [inline]
 do_sys_truncate+0xb0/0x1b0 fs/open.c:132
 __do_sys_truncate fs/open.c:146 [inline]
 __se_sys_truncate fs/open.c:144 [inline]
 __arm64_sys_truncate+0x5c/0x70 fs/open.c:144
 __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
9pnet_fd: Insufficient options for proto=fd