loop2: detected capacity change from 0 to 8192
BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 0 PID: 7025 Comm: syz.2.529 Not tainted 6.1.134-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 dump_stack+0x1c/0x105c 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+0x1b88/0x7680 kernel/locking/lockdep.c:5049
 lock_acquire+0x26c/0x7cc 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
 debug_object_activate+0x80/0x4b4 lib/debugobjects.c:698
 debug_work_activate kernel/workqueue.c:510 [inline]
 __queue_work+0xd34/0x136c kernel/workqueue.c:1519
 queue_work_on+0xc0/0x16c kernel/workqueue.c:1548
 queue_work include/linux/workqueue.h:512 [inline]
 loop_queue_work drivers/block/loop.c:892 [inline]
 loop_queue_rq+0x978/0xae0 drivers/block/loop.c:1873
 __blk_mq_issue_directly block/blk-mq.c:2631 [inline]
 __blk_mq_try_issue_directly+0x430/0x6c0 block/blk-mq.c:2684
 blk_mq_try_issue_directly+0x3c/0x1d8 block/blk-mq.c:2708
 blk_mq_submit_bio+0x1088/0x1d08 block/blk-mq.c:3045
 __submit_bio+0x214/0x2a0 block/blk-core.c:591
 __submit_bio_noacct_mq block/blk-core.c:668 [inline]
 submit_bio_noacct_nocheck+0x794/0xbf8 block/blk-core.c:697
 submit_bio_noacct+0xce8/0x1728 block/blk-core.c:792
 submit_bio+0x2c0/0x45c block/blk-core.c:837
 submit_bh_wbc+0x398/0x468 fs/buffer.c:2702
 submit_bh fs/buffer.c:2707 [inline]
 __bread_slow fs/buffer.c:1177 [inline]
 __bread_gfp+0xe4/0x2ec fs/buffer.c:1370
 sb_bread include/linux/buffer_head.h:338 [inline]
 fat_ent_bread+0x13c/0x274 fs/fat/fatent.c:109
 fat_ent_read_block+0x358/0x46c fs/fat/fatent.c:445
 fat_alloc_clusters+0x3e4/0xe80 fs/fat/fatent.c:493
 fat_alloc_new_dir+0x15c/0xbb8 fs/fat/dir.c:1144
 vfat_mkdir+0x148/0x2f0 fs/fat/namei_vfat.c:859
 vfs_mkdir+0x334/0x4e4 fs/namei.c:4106
 do_mkdirat+0x220/0x510 fs/namei.c:4131
 __do_sys_mkdirat fs/namei.c:4146 [inline]
 __se_sys_mkdirat fs/namei.c:4144 [inline]
 __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4144
 __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+0x58/0x168 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