[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.

Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.1.122' (ECDSA) to the list of known hosts.
syzkaller login: [   62.351454][ T8378] IPVS: ftp: loaded support on port[0] = 21
[   62.415288][   T53] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   62.428035][   T53] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   62.436862][    T8] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
executing program
[   62.477999][   T53] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
[   62.485959][   T53] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
[   62.496578][    T8] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
[   62.777600][    T8] usb 1-1: new high-speed USB device number 2 using dummy_hcd
[   63.027469][    T8] usb 1-1: Using ep0 maxpacket: 32
[   63.187852][    T8] usb 1-1: unable to get BOS descriptor or descriptor too short
[   63.507540][    T8] usb 1-1: string descriptor 0 read error: -22
[   63.514138][    T8] usb 1-1: New USB device found, idVendor=0af0, idProduct=6811, bcdDevice=d7.8a
[   63.524253][    T8] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   63.535431][    T8] usb 1-1: config 0 descriptor??
[   63.579384][    T8] hso 1-1:0.0: Can't find BULK IN endpoint
[   63.585852][    T8] ------------[ cut here ]------------
[   63.596858][    T8] WARNING: CPU: 0 PID: 8 at net/core/dev.c:10900 unregister_netdevice_many+0x205/0x1760
[   63.607926][    T8] Modules linked in:
[   63.612031][    T8] CPU: 0 PID: 8 Comm: kworker/0:2 Not tainted 5.12.0-rc6-syzkaller #0
[   63.621045][    T8] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   63.631325][    T8] Workqueue: usb_hub_wq hub_event
[   63.636357][    T8] RIP: 0010:unregister_netdevice_many+0x205/0x1760
[   63.642967][    T8] Code: 05 00 00 31 ff 44 89 fe e8 78 28 76 fa 45 84 ff 0f 85 49 ff ff ff e8 ba 21 76 fa 0f 1f 44 00 00 e8 b0 21 76 fa e8 ab 21 76 fa <0f> 0b 4c 89 ef e8 b1 a2 ce fc 31 ff 41 89 c5 89 c6 e8 45 28 76 fa
[   63.662930][    T8] RSP: 0018:ffffc90000cd6f40 EFLAGS: 00010293
[   63.669418][    T8] RAX: 0000000000000000 RBX: ffff888016662000 RCX: 0000000000000000
[   63.677480][    T8] RDX: ffff8880111354c0 RSI: ffffffff86fdcf65 RDI: 0000000000000003
[   63.685536][    T8] RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
[   63.693610][    T8] R10: ffffffff86fdcf48 R11: 0000000000000000 R12: ffffc90000cd7010
[   63.701657][    T8] R13: ffff888016662060 R14: ffffc90000cd6fb0 R15: 0000000000000000
[   63.709680][    T8] FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
[   63.719840][    T8] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   63.726424][    T8] CR2: 0000561c7b48e398 CR3: 00000000259f0000 CR4: 0000000000350ef0
[   63.734438][    T8] Call Trace:
[   63.737783][    T8]  ? __mutex_lock+0x620/0x1120
[   63.742561][    T8]  ? net_tx_action+0xbe0/0xbe0
[   63.747376][    T8]  ? mutex_lock_io_nested+0xf70/0xf70
[   63.752779][    T8]  unregister_netdevice_queue+0x2dd/0x3c0
[   63.758571][    T8]  ? unregister_netdevice_many+0x1760/0x1760
[   63.764561][    T8]  unregister_netdev+0x18/0x20
[   63.770016][    T8]  hso_free_net_device+0x110/0x3b0
[   63.775143][    T8]  hso_create_net_device+0x79c/0xa80
[