Warning: Permanently added '10.128.1.6' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   21.963868][   T94] usb 1-1: new high-speed USB device number 2 using dummy_hcd
[   22.054077][   T94] usb 1-1: Using ep0 maxpacket: 16
[   22.173933][   T94] usb 1-1: config 1 has an invalid interface number: 189 but max is 0
[   22.182262][   T94] usb 1-1: config 1 has no interface number 0
[   22.188499][   T94] usb 1-1: config 1 interface 189 altsetting 0 endpoint 0xB has invalid wMaxPacketSize 0
[   22.202184][   T94] usb 1-1: config 1 interface 189 altsetting 0 bulk endpoint 0xB has invalid maxpacket 0
[   22.212122][   T94] usb 1-1: config 1 interface 189 altsetting 0 endpoint 0x8A has invalid wMaxPacketSize 0
[   22.222117][   T94] usb 1-1: config 1 interface 189 altsetting 0 bulk endpoint 0x8A has invalid maxpacket 0
[   22.232126][   T94] usb 1-1: New USB device found, idVendor=10cf, idProduct=5503, bcdDevice=fc.72
[   22.241385][   T94] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[   22.288153][   T94] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN
[   22.299325][   T94] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
[   22.307784][   T94] CPU: 0 PID: 94 Comm: kworker/0:2 Not tainted 5.6.0-rc3-syzkaller #0
[   22.315922][   T94] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   22.326065][   T94] Workqueue: usb_hub_wq hub_event
[   22.331098][   T94] RIP: 0010:vmk80xx_write_packet+0x75/0x260
[   22.336984][   T94] Code: 48 8d 7b 68 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 d3 01 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 6b 68 4c 89 ea 48 c1 ea 03 <0f> b6 04 02 4c 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 84 01 00 00
[   22.356594][   T94] RSP: 0018:ffff8881d5cbf1e0 EFLAGS: 00010202
[   22.362688][   T94] RAX: dffffc0000000000 RBX: ffff8881d5fb5b00 RCX: 0000000000000000
[   22.370692][   T94] RDX: 0000000000000002 RSI: ffffffff848b3b23 RDI: ffff8881d5fb5b68
[   22.378657][   T94] RBP: ffff8881cdb34400 R08: ffff8881d78d6200 R09: 0000000000000010
[   22.386673][   T94] R10: fffffbfff1266c95 R11: ffffffff893364af R12: ffff8881cda02000
[   22.394636][   T94] R13: 0000000000000010 R14: 0000000000000000 R15: ffff8881d9577f88
[   22.402641][   T94] FS:  0000000000000000(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000
[   22.411599][   T94] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   22.418460][   T94] CR2: 00007f195be95000 CR3: 00000001d32a4000 CR4: 00000000001406f0
[   22.426427][   T94] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   22.434541][   T94] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   22.442500][   T94] Call Trace:
[   22.445784][   T94]  vmk80xx_auto_attach+0x13b1/0x17c0
[   22.451104][   T94]  comedi_auto_config+0x16e/0x250
[   22.456229][   T94]  usb_probe_interface+0x310/0x800
[   22.461333][   T94]  ? usb_probe_device+0x230/0x230
[   22.466348][   T94]  really_probe+0x290/0xac0
[   22.470837][   T94]  driver_probe_device+0x223/0x350
[   22.475933][   T94]  __device_attach_driver+0x1d1/0x290
[   22.481293][   T94]  ? driver_allows_async_probing+0x160/0x160
[   22.487271][   T94]  bus_for_each_drv+0x162/0x1e0
[   22.492123][   T94]  ? bus_rescan_devices+0x20/0x20
[   22.497140][   T94]  ? _raw_spin_unlock_irqrestore+0x39/0x40
[   22.502937][   T94]  ? lockdep_hardirqs_on+0x382/0x580
[   22.508222][   T94]  __device_attach+0x217/0x390
[   22.513026][   T94]  ? device_bind_driver+0xd0/0xd0
[   22.518047][   T94]  bus_probe_device+0x1e4/0x290
[   22.522893][   T94]  device_add+0x1459/0x1bf0
[   22.527427][   T94]  ? wait_for_completion+0x3c0/0x3c0
[   22.532706][   T94]  ? device_link_remove+0x110/0x110
[   22.538042][   T94]  ? _raw_spin_unlock_irqrestore+0x39/0x40
[   22.543842][   T94]  usb_set_configuration+0xe47/0x17d0
[   22.549204][   T94]  usb_generic_driver_probe+0x9d/0xe0
[   22.554570][   T94]  usb_probe_device+0xd9/0x230
[   22.559438][   T94]  ? usb_suspend+0x5f0/0x5f0
[   22.564016][   T94]  really_probe+0x290/0xac0
[   22.568500][   T94]  driver_probe_device+0x223/0x350
[   22.573606][   T94]  __device_attach_driver+0x1d1/0x290
[   22.578993][   T94]  ? driver_allows_async_probing+0x160/0x160
[   22.585009][   T94]  bus_for_each_drv+0x162/0x1e0
[   22.589888][   T94]  ? bus_rescan_devices+0x20/0x20
[   22.594929][   T94]  ? _raw_spin_unlock_irqrestore+0x39/0x40
[   22.600790][   T94]  ? lockdep_hardirqs_on+0x382/0x580
[   22.606069][   T94]  __device_attach+0x217/0x390
[   22.610827][   T94]  ? device_bind_driver+0xd0/0xd0
[   22.615840][   T94]  bus_probe_device+0x1e4/0x290
[   22.620730][   T94]  device_add+0x1459/0x1bf0
[   22.625253][   T94]  ? device_link_remove+0x110/0x110
[   22.630444][   T94]  usb_new_device.cold+0x540/0xcd0
[   22.635638][   T94]  hub_event+0x21cb/0x4300
[   22.640139][   T94]  ? hub_port_debounce+0x350/0x350
[   22.645242][   T94]  ? find_held_lock+0x2d/0x110
[   22.650013][   T94]  ? mark_held_locks+0xe0/0xe0
[   22.654786][   T94]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   22.660329][   T94]  ? rcu_read_lock_bh_held+0xb0/0xb0
[   22.665719][   T94]  process_one_work+0x94b/0x1620
[   22.670661][   T94]  ? pwq_dec_nr_in_flight+0x310/0x310
[   22.676084][   T94]  ? do_raw_spin_lock+0x129/0x290
[   22.681275][   T94]  worker_thread+0x96/0xe20
[   22.685798][   T94]  ? process_one_work+0x1620/0x1