------------[ cut here ]------------
lockdep bfs error:-1
WARNING: CPU: 0 PID: 7995 at kernel/locking/lockdep.c:2071 print_bfs_bug+0x24/0x30 kernel/locking/lockdep.c:2071
Modules linked in:
CPU: 0 PID: 7995 Comm: syz-executor.5 Not tainted 6.7.0-syzkaller-13004-g4fbbed787267 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:print_bfs_bug+0x24/0x30 kernel/locking/lockdep.c:2071
Code: e9 53 fa ff ff 90 55 53 89 fb e8 47 51 1a 03 89 c5 e8 50 20 ff ff 85 ed 74 14 90 48 c7 c7 40 bd 6a 8b 89 de e8 bd 9f e6 ff 90 <0f> 0b 90 90 5b 5d c3 0f 1f 44 00 00 55 41 57 41 56 41 55 41 54 53
RSP: 0000:ffffc90004466748 EFLAGS: 00010046
RAX: 7512247f49a55500 RBX: 00000000ffffffff RCX: ffff88808308bb80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff8154c492 R09: 1ffff110173051a2
R10: dffffc0000000000 R11: ffffed10173051a3 R12: dffffc0000000001
R13: ffffffff91edcd08 R14: ffffffff90b04be0 R15: ffffffff91edcc98
FS:  000055555752d480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0e226a0000 CR3: 0000000049a10000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 check_irq_usage kernel/locking/lockdep.c:2806 [inline]
 check_prev_add kernel/locking/lockdep.c:3138 [inline]
 check_prevs_add kernel/locking/lockdep.c:3253 [inline]
 validate_chain+0x498a/0x5ab0 kernel/locking/lockdep.c:3869
 __lock_acquire+0x1345/0x1fd0 kernel/locking/lockdep.c:5137
 lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
 debug_object_activate+0x16d/0x510 lib/debugobjects.c:708
 debug_timer_activate kernel/time/timer.c:779 [inline]
 __mod_timer+0x7e5/0xfd0 kernel/time/timer.c:1119
 queue_delayed_work_on+0x15a/0x260 kernel/workqueue.c:1989
 queue_delayed_work include/linux/workqueue.h:563 [inline]
 schedule_delayed_work include/linux/workqueue.h:677 [inline]
 __debug_check_no_obj_freed lib/debugobjects.c:1012 [inline]
 debug_check_no_obj_freed+0x14a/0x580 lib/debugobjects.c:1019
 slab_free_hook mm/slub.c:2093 [inline]
 slab_free mm/slub.c:4299 [inline]
 kmem_cache_free+0xcc/0x2a0 mm/slub.c:4363
 kernfs_put+0x2a4/0x420 fs/kernfs/dir.c:569
 kernfs_remove_by_name_ns+0xe4/0x150 fs/kernfs/dir.c:1686
 kernfs_remove_by_name include/linux/kernfs.h:623 [inline]
 remove_files fs/sysfs/group.c:28 [inline]
 sysfs_remove_group+0xfe/0x2a0 fs/sysfs/group.c:292
 loop_sysfs_exit drivers/block/loop.c:749 [inline]
 __loop_clr_fd+0x2d8/0x690 drivers/block/loop.c:1161
 loop_clr_fd drivers/block/loop.c:1253 [inline]
 lo_ioctl+0x16d3/0x2080 drivers/block/loop.c:1557
 blkdev_ioctl+0x5cf/0x730 block/ioctl.c:636
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xf8/0x170 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fb17dc7cb0b
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007ffe0d8d9e70 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fb17dc7cb0b
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000003
RBP: 00007ffe0d8d9f2c R08: 0000000000000000 R09: 00007ffe0d8d9c17
R10: 0000000000000000 R11: 0000000000000246 R12: 000055555752e95b
R13: 000055555752e900 R14: 00007fb17dcdc5e0 R15: 0000000000000000
 </TASK>