usb 1-1: USB disconnect, device number 42 cdc_ether 1-1:1.0 usb0: unregister 'cdc_ether' usb-dummy_hcd.0-1, CDC Ethernet Device ------------[ cut here ]------------ WARNING: net/sched/sch_generic.c:1496 at dev_shutdown+0x354/0x368 net/sched/sch_generic.c:1496, CPU#0: kworker/0:3/4468 Modules linked in: CPU: 0 UID: 0 PID: 4468 Comm: kworker/0:3 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Workqueue: usb_hub_wq hub_event pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : dev_shutdown+0x354/0x368 net/sched/sch_generic.c:1496 lr : dev_shutdown+0x354/0x368 net/sched/sch_generic.c:1496 sp : ffff800097b57160 x29: ffff800097b57160 x28: ffff0001ae07cc50 x27: 0000000000000001 x26: 1fffe0001a450003 x25: 0000000000000000 x24: 1fffe0001a4500a1 x23: dfff800000000000 x22: 1fffe0001a450098 x21: ffff800089c84b00 x20: ffff0000d2280510 x19: ffff0000d22805f0 x18: 0000000000000000 x17: 0000000000000000 x16: ffff0000d51a2634 x15: 0000000000000000 x14: 00000000ffff8000 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000000000000 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000008 x3 : ffff800084d60ab8 x2 : 0000000000000001 x1 : ffff0000cec21d00 x0 : 0000000000000000 Call trace: dev_shutdown+0x354/0x368 net/sched/sch_generic.c:1496 (P) unregister_netdevice_many_notify+0xbfc/0x18d8 net/core/dev.c:12409 unregister_netdevice_many net/core/dev.c:12484 [inline] unregister_netdevice_queue+0x270/0x308 net/core/dev.c:12294 unregister_netdevice include/linux/netdevice.h:3444 [inline] unregister_netdev+0x2c/0x70 net/core/dev.c:12502 usbnet_disconnect+0xb8/0x344 drivers/net/usb/usbnet.c:1685 usb_unbind_interface+0x194/0x6e8 drivers/usb/core/driver.c:458 device_remove+0x114/0x134 drivers/base/dd.c:621 __device_release_driver drivers/base/dd.c:1352 [inline] device_release_driver_internal+0x124/0x208 drivers/base/dd.c:1375 device_release_driver+0x28/0x38 drivers/base/dd.c:1398 bus_remove_device+0x2d0/0x3f8 drivers/base/bus.c:657 device_del+0x3f0/0x710 drivers/base/core.c:3895 usb_disable_device+0x250/0x66c drivers/usb/core/message.c:1478 usb_disconnect+0x224/0x6f8 drivers/usb/core/hub.c:2345 hub_port_connect drivers/usb/core/hub.c:5407 [inline] hub_port_connect_change drivers/usb/core/hub.c:5707 [inline] port_event drivers/usb/core/hub.c:5871 [inline] hub_event+0x2a24/0x3b20 drivers/usb/core/hub.c:5953 process_one_work kernel/workqueue.c:3314 [inline] process_scheduled_works+0x79c/0x1098 kernel/workqueue.c:3397 worker_thread+0x754/0xba0 kernel/workqueue.c:3478 kthread+0x2f8/0x3c8 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842 irq event stamp: 240108 hardirqs last enabled at (240107): [] __call_rcu_common kernel/rcu/tree.c:3156 [inline] hardirqs last enabled at (240107): [] call_rcu+0x470/0x774 kernel/rcu/tree.c:3251 hardirqs last disabled at (240108): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:425 softirqs last enabled at (240054): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (240054): [] fib6_run_gc+0x56c/0x5e0 net/ipv6/ip6_fib.c:2453 softirqs last disabled at (240046): [] spin_trylock_bh include/linux/spinlock.h:414 [inline] softirqs last disabled at (240046): [] fib6_run_gc+0xc0/0x5e0 net/ipv6/ip6_fib.c:2436 ---[ end trace 0000000000000000 ]--- usb 1-1: new high-speed USB device number 43 using dummy_hcd usb 1-1: Using ep0 maxpacket: 16 usb 1-1: config 1 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 usb 1-1: config 1 interface 0 altsetting 0 bulk endpoint 0x82 has invalid maxpacket 96 usb 1-1: config 1 interface 0 altsetting 0 bulk endpoint 0x3 has invalid maxpacket 8 usb 1-1: config 1 interface 0 altsetting 0 has 3 endpoint descriptors, different from the interface descriptor's value: 18 usb 1-1: New USB device found, idVendor=0525, idProduct=a4a1, bcdDevice= 0.40 usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=1 usb 1-1: SerialNumber: syz hub 1-1:1.0: bad descriptor, ignoring hub hub 1-1:1.0: probe with driver hub failed with error -5 cdc_ether 1-1:1.0 usb0: register 'cdc_ether' at usb-dummy_hcd.0-1, CDC Ethernet Device, 42:42:42:42:42:42