F2FS-fs (loop0): Try to recover 1th superblock, ret: 0
F2FS-fs (loop0): Mounted with checkpoint version = 48b305e5
BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 1 PID: 7471 Comm: syz.0.539 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026
Call trace:
 dump_backtrace+0x1c4/0x1f0 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+0xf4/0x15c 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:3777 [inline]
 validate_chain kernel/locking/lockdep.c:3798 [inline]
 __lock_acquire+0x1864/0x6634 kernel/locking/lockdep.c:5063
 lock_acquire+0x20c/0x638 kernel/locking/lockdep.c:5676
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x6c/0xb0 kernel/locking/spinlock.c:162
 debug_object_activate+0x78/0x4c0 lib/debugobjects.c:747
 debug_work_activate kernel/workqueue.c:510 [inline]
 __queue_work+0xcec/0x1280 kernel/workqueue.c:1519
 queue_work_on+0xc0/0x164 kernel/workqueue.c:1548
 queue_work include/linux/workqueue.h:512 [inline]
 loop_queue_work drivers/block/loop.c:893 [inline]
 loop_queue_rq+0x91c/0xa48 drivers/block/loop.c:1874
 __blk_mq_issue_directly block/blk-mq.c:2643 [inline]
 __blk_mq_try_issue_directly+0x3f8/0x63c block/blk-mq.c:2696
 blk_mq_try_issue_directly+0x3c/0x1e0 block/blk-mq.c:2720
 blk_mq_submit_bio+0xfbc/0x1ad8 block/blk-mq.c:3058
 __submit_bio+0x1d8/0x260 block/blk-core.c:591
 __submit_bio_noacct_mq block/blk-core.c:668 [inline]
 submit_bio_noacct_nocheck+0x65c/0xa1c block/blk-core.c:697
 submit_bio_noacct+0xc6c/0x1670 block/blk-core.c:808
 submit_bio+0x29c/0x3d0 block/blk-core.c:853
 __submit_bio+0x7b8/0xddc fs/f2fs/data.c:549
 __submit_merged_bio+0x278/0x73c fs/f2fs/data.c:570
 __f2fs_submit_merged_write fs/f2fs/data.c:657 [inline]
 __submit_merged_write_cond+0x23c/0x4d0 fs/f2fs/data.c:679
 f2fs_submit_merged_write+0x38/0x48 fs/f2fs/data.c:689
 f2fs_sync_node_pages+0x162c/0x187c fs/f2fs/node.c:2085
 block_operations fs/f2fs/checkpoint.c:1294 [inline]
 f2fs_write_checkpoint+0xb10/0x17a0 fs/f2fs/checkpoint.c:1670
 f2fs_issue_checkpoint+0x25c/0x39c fs/f2fs/checkpoint.c:1877
 f2fs_sync_fs+0x1dc/0x4d8 fs/f2fs/super.c:1712
 f2fs_mkdir+0x3d0/0x4d0 fs/f2fs/namei.c:721
 vfs_mkdir+0x314/0x4d8 fs/namei.c:4114
 do_mkdirat+0x1b8/0x3ec fs/namei.c:4139
 __do_sys_mkdirat fs/namei.c:4154 [inline]
 __se_sys_mkdirat fs/namei.c:4152 [inline]
 __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4152
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 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