__linkwatch_run_queue+0x2a6/0x7a0 net/core/link_watch.c:244 linkwatch_event+0x8f/0xc0 net/core/link_watch.c:304 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400 kthread+0x3c2/0x780 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 23 at lib/ref_tracker.c:255 ref_tracker_free+0x61a/0x830 lib/ref_tracker.c:255 Modules linked in: CPU: 1 UID: 0 PID: 23 Comm: kworker/1:0 Not tainted 6.15.0-rc6-syzkaller-00177-g882826f58b2c #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: usb_hub_wq hub_event RIP: 0010:ref_tracker_free+0x61a/0x830 lib/ref_tracker.c:255 Code: 00 44 8b 73 18 31 ff 44 89 f6 e8 f1 7f ea fe 45 85 f6 0f 85 a6 00 00 00 e8 a3 84 ea fe 48 8b 34 24 48 89 ef e8 97 d2 94 04 90 <0f> 0b 90 bb ea ff ff ff e9 50 fd ff ff e8 84 84 ea fe 4c 8d 6d 44 RSP: 0018:ffffc9000018f110 EFLAGS: 00010202 RAX: 0000000000000201 RBX: ffff88811c92d040 RCX: 0000000000000000 RDX: 0000000000000202 RSI: ffffffff88ad7713 RDI: 0000000000000001 RBP: ffff88811fae05d0 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff8a78cc97 R11: 00000000000c57a8 R12: 1ffff92000031e24 R13: ffffc9000018f140 R14: 0000000001fe03b5 R15: ffff88811c92d058 FS: 0000000000000000(0000) GS:ffff8882692c2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff6a6281286 CR3: 000000011fa6e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: netdev_tracker_free include/linux/netdevice.h:4351 [inline] netdev_put include/linux/netdevice.h:4368 [inline] netdev_put include/linux/netdevice.h:4364 [inline] netdev_watchdog_down net/sched/sch_generic.c:571 [inline] dev_deactivate_many+0x286/0xd30 net/sched/sch_generic.c:1367 __dev_close_many+0x151/0x670 net/core/dev.c:1686 dev_close_many+0x233/0x630 net/core/dev.c:1727 unregister_netdevice_many_notify+0x6dd/0x2550 net/core/dev.c:11940 unregister_netdevice_many net/core/dev.c:12034 [inline] unregister_netdevice_queue+0x305/0x3f0 net/core/dev.c:11877 unregister_netdevice include/linux/netdevice.h:3374 [inline] unregister_netdev+0x1f/0x60 net/core/dev.c:12052 usbnet_disconnect+0x109/0x500 drivers/net/usb/usbnet.c:1648 usb_unbind_interface+0x1da/0x9a0 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:569 [inline] device_remove+0x122/0x170 drivers/base/dd.c:561 __device_release_driver drivers/base/dd.c:1272 [inline] device_release_driver_internal+0x44b/0x620 drivers/base/dd.c:1295 bus_remove_device+0x22f/0x420 drivers/base/bus.c:579 device_del+0x396/0x9f0 drivers/base/core.c:3881 usb_disable_device+0x355/0x7d0 drivers/usb/core/message.c:1418 usb_disconnect+0x2e1/0x920 drivers/usb/core/hub.c:2316 hub_port_connect drivers/usb/core/hub.c:5375 [inline] hub_port_connect_change drivers/usb/core/hub.c:5675 [inline] port_event drivers/usb/core/hub.c:5835 [inline] hub_event+0x1aa0/0x5030 drivers/usb/core/hub.c:5917 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400 kthread+0x3c2/0x780 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245