ODEBUG: free active (active state 0) object: ffff888037f35160 object type: work_struct hint: usbnet_deferred_kevent+0x0/0xdd0 drivers/net/usb/usbnet.c:669 WARNING: CPU: 1 PID: 5218 at lib/debugobjects.c:509 debug_print_object+0x194/0x2c0 lib/debugobjects.c:509 Modules linked in: CPU: 1 PID: 5218 Comm: kworker/1:8 Not tainted 6.3.0-rc4-next-20230328-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Workqueue: usb_hub_wq hub_event RIP: 0010:debug_print_object+0x194/0x2c0 lib/debugobjects.c:509 Code: df 48 89 fe 48 c1 ee 03 80 3c 16 00 0f 85 c7 00 00 00 48 8b 14 dd 80 03 a7 8a 50 4c 89 ee 48 c7 c7 40 f7 a6 8a e8 ec 84 35 fd <0f> 0b 58 83 05 36 ef 62 0a 01 48 83 c4 20 5b 5d 41 5c 41 5d 41 5e RSP: 0018:ffffc90004e6f528 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000003 RCX: ffffc90014fec000 RDX: 0000000000040000 RSI: ffffffff814b2807 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8a4b8680 R13: ffffffff8aa6fc40 R14: ffff888022dd8cc8 R15: ffffffff8151c4c0 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcc372711d0 CR3: 000000007ac44000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __debug_check_no_obj_freed lib/debugobjects.c:996 [inline] debug_check_no_obj_freed+0x305/0x420 lib/debugobjects.c:1027 slab_free_hook mm/slub.c:1756 [inline] slab_free_freelist_hook+0xeb/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3787 [inline] __kmem_cache_free+0xaf/0x2d0 mm/slub.c:3800 kvfree+0x46/0x50 mm/util.c:650 device_release+0xa3/0x240 drivers/base/core.c:2477 kobject_cleanup lib/kobject.c:683 [inline] kobject_release lib/kobject.c:714 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1c2/0x4d0 lib/kobject.c:731 put_device+0x1f/0x30 drivers/base/core.c:3719 free_netdev+0x441/0x620 net/core/dev.c:10736 usbnet_disconnect+0x26b/0x500 drivers/net/usb/usbnet.c:1637 usb_unbind_interface+0x1dc/0x8e0 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:569 [inline] device_remove+0x11f/0x170 drivers/base/dd.c:561 __device_release_driver drivers/base/dd.c:1267 [inline] device_release_driver_internal+0x443/0x610 drivers/base/dd.c:1290 bus_remove_device+0x22c/0x420 drivers/base/bus.c:574 device_del+0x48a/0xb80 drivers/base/core.c:3797 usb_disable_device+0x35a/0x7b0 drivers/usb/core/message.c:1420 usb_disconnect+0x2db/0x8a0 drivers/usb/core/hub.c:2238 hub_port_connect drivers/usb/core/hub.c:5246 [inline] hub_port_connect_change drivers/usb/core/hub.c:5551 [inline] port_event drivers/usb/core/hub.c:5711 [inline] hub_event+0x1fbf/0x4e40 drivers/usb/core/hub.c:5793 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552 kthread+0x33e/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308