Warning: Permanently added '10.128.0.145' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 27.058370][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 27.418390][ T12] usb 1-1: config 1 has an invalid interface number: 1 but max is 0 [ 27.426476][ T12] usb 1-1: config 1 has an invalid interface number: 1 but max is 0 [ 27.434503][ T12] usb 1-1: config 1 has 2 interfaces, different from the descriptor's value: 1 [ 27.443482][ T12] usb 1-1: config 1 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 27.454393][ T12] usb 1-1: config 1 interface 1 altsetting 1 bulk endpoint 0x82 has invalid maxpacket 0 [ 27.464142][ T12] usb 1-1: config 1 interface 1 altsetting 1 bulk endpoint 0x3 has invalid maxpacket 0 [ 27.473813][ T12] usb 1-1: New USB device found, idVendor=0525, idProduct=a4a1, bcdDevice= 0.40 [ 27.482846][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 29.068511][ T12] cdc_ncm 1-1:1.0: MAC-Address: 42:42:42:42:42:42 [ 29.075021][ T12] cdc_ncm 1-1:1.0: dwNtbInMaxSize=0 is too small. Using 2048 [ 29.082616][ T12] cdc_ncm 1-1:1.0: setting rx_max = 2048 [ 29.298425][ T12] divide error: 0000 [#1] SMP KASAN [ 29.303655][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.3.0-rc7+ #0 [ 29.311001][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.321048][ T12] Workqueue: usb_hub_wq hub_event [ 29.326059][ T12] RIP: 0010:usbnet_update_max_qlen+0x231/0x370 [ 29.332206][ T12] Code: 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 46 01 00 00 48 8d bb f4 00 00 00 31 d2 b8 c8 63 01 00 48 89 f9 <48> f7 b3 a8 01 00 00 48 ba 00 00 00 00 00 fc ff df 48 c1 e9 03 0f [ 29.351785][ T12] RSP: 0018:ffff8881da20f010 EFLAGS: 00010246 [ 29.357826][ T12] RAX: 00000000000163c8 RBX: ffff8881d5ad8ac0 RCX: ffff8881d5ad8bb4 [ 29.366752][ T12] RDX: 0000000000000000 RSI: ffffffff8344ecde RDI: ffff8881d5ad8bb4 [ 29.374710][ T12] RBP: 0000000000000003 R08: ffff8881da1f9800 R09: ffffed103ab5b00a [ 29.382655][ T12] R10: ffffed103ab5b009 R11: ffff8881d5ad804f R12: 0000000000000000 [ 29.390601][ T12] R13: ffff8881d5ad8c38 R14: ffff8881d5ad8ac0 R15: ffff8881d2820c80 [ 29.398546][ T12] FS: 0000000000000000(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 [ 29.407447][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.414004][ T12] CR2: 00007f26d0180000 CR3: 00000001d38dd000 CR4: 00000000001406f0 [ 29.422008][ T12] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.429976][ T12] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.437932][ T12] Call Trace: [ 29.441215][ T12] cdc_ncm_update_rxtx_max+0x8e9/0xef0 [ 29.446649][ T12] ? cdc_ncm_select_altsetting+0x1a0/0x1a0 [ 29.452439][ T12] cdc_ncm_bind_common+0x1005/0x2570 [ 29.457698][ T12] ? cdc_ncm_align_tail+0x1b0/0x1b0 [ 29.462886][ T12] ? __debug_object_init+0x47c/0xdd0 [ 29.468156][ T12] ? lockdep_init_map+0x1b0/0x5e0 [ 29.473165][ T12] cdc_ncm_bind+0x7c/0x1c0 [ 29.477575][ T12] ? cdc_ncm_bind_common+0x2570/0x2570 [ 29.483025][ T12] usbnet_probe+0xb43/0x23cf [ 29.487635][ T12] usb_probe_interface+0x305/0x7a0 [ 29.492739][ T12] ? usb_probe_device+0x100/0x100 [ 29.497748][ T12] really_probe+0x281/0x6d0 [ 29.502230][ T12] driver_probe_device+0x101/0x1b0 [ 29.507317][ T12] __device_attach_driver+0x1c2/0x220 [ 29.512664][ T12] ? driver_allows_async_probing+0x160/0x160 [ 29.518632][ T12] bus_for_each_drv+0x162/0x1e0 [ 29.523457][ T12] ? bus_rescan_devices+0x20/0x20 [ 29.528467][ T12] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 29.534258][ T12] ? lockdep_hardirqs_on+0x379/0x580 [ 29.539545][ T12] __device_attach+0x217/0x360 [ 29.544284][ T12] ? device_bind_driver+0xd0/0xd0 [ 29.549285][ T12] ? kobject_uevent_env+0x29e/0x1150 [ 29.554543][ T12] ? kobject_uevent_env+0x2a8/0x1150 [ 29.559799][ T12] bus_probe_device+0x1e4/0x290 [ 29.564623][ T12] ? blocking_notifier_call_chain+0x54/0xa0 [ 29.570488][ T12] device_add+0xae6/0x16f0 [ 29.574893][ T12] ? uevent_store+0x50/0x50 [ 29.579372][ T12] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 29.585165][ T12] usb_set_configuration+0xdf6/0x1670 [ 29.590516][ T12] generic_probe+0x9d/0xd5 [ 29.594905][ T12] usb_probe_device+0x99/0x100 [ 29.599665][ T12] ? usb_suspend+0x620/0x620 [ 29.604231][ T12] really_probe+0x281/0x6d0 [ 29.608731][ T12] driver_probe_device+0x101/0x1b0 [ 29.613902][ T12] __device_attach_driver+0x1c2/0x220 [ 29.619248][ T12] ? driver_allows_async_probing+0x160/0x160 [ 29.625219][ T12] bus_for_each_drv+0x162/0x1e0 [ 29.630054][ T12] ? bus_rescan_devices+0x20/0x20 [ 29.635053][ T12] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 29.640834][ T12] ? lockdep_hardirqs_on+0x379/0x580 [ 29.646102][ T12] __device_attach+0x217/0x360 [ 29.650838][ T12] ? device_bind_driver+0xd0/0xd0 [ 29.655856][ T12] ? kobject_uevent_env+0x29e/0x1150 [ 29.661146][ T12] ? kobject_uevent_env+0x2a8/0x1150 [ 29.666416][ T12] bus_probe_device+0x1e4/0x290 [ 29.671248][ T12] ? blocking_notifier_call_chain+0x54/0xa0 [ 29.677215][ T12] device_add+0xae6/0x16f0 [ 29.681604][ T12] ? uevent_store+0x50/0x50 [ 29.686084][ T12] usb_new_device.cold+0x6a4/0xe79 [ 29.691182][ T12] hub_event+0x1b5c/0x3640 [ 29.695572][ T12] ? hub_port_debounce+0x260/0x260