------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff8880263451c0 object type: timer_list hint: vub300_inactivity_timer_expired+0x0/0x3e0
WARNING: CPU: 0 PID: 5765 at lib/debugobjects.c:518 debug_print_object lib/debugobjects.c:515 [inline]
WARNING: CPU: 0 PID: 5765 at lib/debugobjects.c:518 __debug_check_no_obj_freed lib/debugobjects.c:1045 [inline]
WARNING: CPU: 0 PID: 5765 at lib/debugobjects.c:518 debug_check_no_obj_freed+0x39f/0x520 lib/debugobjects.c:1075
Modules linked in:
CPU: 0 PID: 5765 Comm: kworker/0:3 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Workqueue: usb_hub_wq hub_event
RIP: 0010:debug_print_object lib/debugobjects.c:515 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:1045 [inline]
RIP: 0010:debug_check_no_obj_freed+0x39f/0x520 lib/debugobjects.c:1075
Code: 8b 4d 00 48 c7 c7 e0 49 1d 8b 48 c7 c6 40 46 1d 8b 48 c7 c2 60 4b 1d 8b 8b 4c 24 1c 4d 89 f8 41 55 e8 45 9e 15 fd 48 83 c4 08 <0f> 0b 4c 8b 6c 24 10 48 b9 00 00 00 00 00 fc ff df ff 05 2a e6 50
RSP: 0018:ffffc9000469f330 EFLAGS: 00010296
RAX: 44b14a6c0110fc00 RBX: ffffffff97562570 RCX: 0000000000100000
RDX: ffffc9001870d000 RSI: 0000000000024dc6 RDI: 0000000000024dc7
RBP: ffffffff8accaf60 R08: ffffc9000469ef27 R09: 1ffff920008d3de4
R10: dffffc0000000000 R11: fffff520008d3de5 R12: 0000000000000001
R13: ffffffff87bb53f0 R14: ffff888026345000 R15: ffff8880263451c0
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32c21ff8 CR3: 000000005c07c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 slab_free_hook mm/slub.c:1786 [inline]
 slab_free_freelist_hook+0xd2/0x1a0 mm/slub.c:1837
 slab_free mm/slub.c:3830 [inline]
 __kmem_cache_free+0xba/0x1f0 mm/slub.c:3843
 device_release+0xbc/0x1e0 drivers/base/core.c:-1
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x21b/0x450 lib/kobject.c:737
 vub300_delete drivers/mmc/host/vub300.c:378 [inline]
 kref_put include/linux/kref.h:65 [inline]
 vub300_disconnect+0x27b/0x2e0 drivers/mmc/host/vub300.c:2381
 usb_unbind_interface+0x204/0x870 drivers/usb/core/driver.c:457
 device_remove drivers/base/dd.c:628 [inline]
 __device_release_driver drivers/base/dd.c:1351 [inline]
 device_release_driver_internal+0x458/0x6f0 drivers/base/dd.c:1374
 bus_remove_device+0x43b/0x520 drivers/base/bus.c:624
 device_del+0x51f/0x910 drivers/base/core.c:3956
 usb_disable_device+0x3ee/0x8a0 drivers/usb/core/message.c:1474
 usb_disconnect+0x340/0x8a0 drivers/usb/core/hub.c:2320
 hub_port_connect drivers/usb/core/hub.c:5374 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5674 [inline]
 port_event drivers/usb/core/hub.c:5838 [inline]
 hub_event+0x1d69/0x4a80 drivers/usb/core/hub.c:5920
 process_one_work kernel/workqueue.c:2657 [inline]
 process_scheduled_works+0xa60/0x1600 kernel/workqueue.c:2734
 worker_thread+0xa5e/0xfe0 kernel/workqueue.c:2815
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>