usb 4-1: USB disconnect, device number 6
------------[ cut here ]------------
ODEBUG: free active (active state 0) object type: timer_list hint: vub300_inactivity_timer_expired+0x0/0x3e0
WARNING: CPU: 1 PID: 4339 at lib/debugobjects.c:521 debug_print_object lib/debugobjects.c:518 [inline]
WARNING: CPU: 1 PID: 4339 at lib/debugobjects.c:521 __debug_check_no_obj_freed lib/debugobjects.c:990 [inline]
WARNING: CPU: 1 PID: 4339 at lib/debugobjects.c:521 debug_check_no_obj_freed+0x395/0x520 lib/debugobjects.c:1020
Modules linked in:
CPU: 1 PID: 4339 Comm: kworker/1:7 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: usb_hub_wq hub_event
RIP: 0010:debug_print_object lib/debugobjects.c:518 [inline]
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:990 [inline]
RIP: 0010:debug_check_no_obj_freed+0x395/0x520 lib/debugobjects.c:1020
Code: e8 10 2b d1 fd 4c 8b 45 00 48 c7 c7 60 4e 7a 8a 48 c7 c6 20 4b 7a 8a 48 c7 c2 c0 4f 7a 8a 8b 4c 24 1c 4d 89 e9 e8 4b 77 c8 05 <0f> 0b 4c 8b 6c 24 10 48 b9 00 00 00 00 00 fc ff df ff 05 4c 33 9e
RSP: 0018:ffffc900034bf448 EFLAGS: 00010246
RAX: 7a5288996429bb00 RBX: ffffffff964fa040 RCX: 0000000000100000
RDX: ffffc90013d89000 RSI: 0000000000015186 RDI: 0000000000015187
RBP: ffffffff8a2cacc0 R08: ffffc900034bef67 R09: 1ffff92000697dec
R10: dffffc0000000000 R11: fffff52000697ded R12: 0000000000000001
R13: ffffffff872d7fc0 R14: ffff88807b52d000 R15: ffff88807b52d280
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9bdf988000 CR3: 0000000024b4f000 CR4: 00000000003506e0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 slab_free_hook mm/slub.c:1685 [inline]
 slab_free_freelist_hook+0x8b/0x170 mm/slub.c:1736
 slab_free mm/slub.c:3504 [inline]
 kfree+0xef/0x2a0 mm/slub.c:4564
 device_release+0x92/0x1c0 drivers/base/core.c:-1
 kobject_cleanup lib/kobject.c:713 [inline]
 kobject_release lib/kobject.c:744 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x217/0x450 lib/kobject.c:761
 vub300_delete drivers/mmc/host/vub300.c:378 [inline]
 kref_put include/linux/kref.h:65 [inline]
 vub300_disconnect+0x277/0x2e0 drivers/mmc/host/vub300.c:2389
 usb_unbind_interface+0x203/0x870 drivers/usb/core/driver.c:458
 __device_release_driver drivers/base/dd.c:1249 [inline]
 device_release_driver_internal+0x487/0x710 drivers/base/dd.c:1282
 bus_remove_device+0x2dd/0x400 drivers/base/bus.c:531
 device_del+0x63f/0xa80 drivers/base/core.c:3615
 usb_disable_device+0x3e7/0x8a0 drivers/usb/core/message.c:1472
 usb_disconnect+0x33c/0x8a0 drivers/usb/core/hub.c:2292
 hub_port_connect drivers/usb/core/hub.c:5346 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5642 [inline]
 port_event drivers/usb/core/hub.c:5804 [inline]
 hub_event+0x1d64/0x5260 drivers/usb/core/hub.c:5886
 process_one_work+0x867/0xff0 kernel/workqueue.c:2310
 worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457
 kthread+0x42e/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
irq event stamp: 78499
hardirqs last  enabled at (78531): [<ffffffff81545b9d>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1338 [inline]
hardirqs last  enabled at (78531): [<ffffffff81545b9d>] finish_lock_switch+0x12d/0x290 kernel/sched/core.c:4803
hardirqs last disabled at (78560): [<ffffffff89c878dc>] __schedule+0x2fc/0x4350 kernel/sched/core.c:6291
softirqs last  enabled at (78582): [<ffffffff814943fb>] __do_softirq kernel/softirq.c:610 [inline]
softirqs last  enabled at (78582): [<ffffffff814943fb>] invoke_softirq kernel/softirq.c:450 [inline]
softirqs last  enabled at (78582): [<ffffffff814943fb>] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
softirqs last disabled at (78597): [<ffffffff814943fb>] __do_softirq kernel/softirq.c:610 [inline]
softirqs last disabled at (78597): [<ffffffff814943fb>] invoke_softirq kernel/softirq.c:450 [inline]
softirqs last disabled at (78597): [<ffffffff814943fb>] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
---[ end trace 6b5588748d0101d1 ]---