Warning: Permanently added '10.128.0.2' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 39.593655][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 39.953766][ T12] usb 1-1: config 1 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 39.965253][ T12] usb 1-1: config 1 interface 1 altsetting 1 bulk endpoint 0x82 has invalid maxpacket 0 [ 39.975119][ T12] usb 1-1: config 1 interface 1 altsetting 1 bulk endpoint 0x3 has invalid maxpacket 0 [ 40.143714][ T12] usb 1-1: New USB device found, idVendor=0525, idProduct=a4a1, bcdDevice= 0.40 [ 40.152770][ T12] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 40.160818][ T12] usb 1-1: Product: syz [ 40.165010][ T12] usb 1-1: Manufacturer: syz [ 40.169597][ T12] usb 1-1: SerialNumber: syz [ 41.313720][ T12] cdc_ncm 1-1:1.0: MAC-Address: 42:42:42:42:42:42 [ 41.320330][ T12] cdc_ncm 1-1:1.0: dwNtbInMaxSize=0 is too small. Using 2048 [ 41.327788][ T12] cdc_ncm 1-1:1.0: setting rx_max = 2048 [ 41.533703][ T12] divide error: 0000 [#1] SMP KASAN [ 41.539161][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.3.0-rc7+ #0 [ 41.546517][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.556784][ T12] Workqueue: usb_hub_wq hub_event [ 41.561805][ T12] RIP: 0010:usbnet_update_max_qlen+0x231/0x370 [ 41.567935][ 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 [ 41.587612][ T12] RSP: 0018:ffff8881da20f010 EFLAGS: 00010246 [ 41.593662][ T12] RAX: 00000000000163c8 RBX: ffff8881d5b470c0 RCX: ffff8881d5b471b4 [ 41.601608][ T12] RDX: 0000000000000000 RSI: ffffffff8344ecde RDI: ffff8881d5b471b4 [ 41.609561][ T12] RBP: 0000000000000003 R08: ffff8881da1f9800 R09: ffffed103ab68cca [ 41.617508][ T12] R10: ffffed103ab68cc9 R11: ffff8881d5b4664f R12: 0000000000000000 [ 41.625455][ T12] R13: ffff8881d5b47238 R14: ffff8881d5b470c0 R15: ffff8881d29ad680 [ 41.633534][ T12] FS: 0000000000000000(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 [ 41.642774][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.649344][ T12] CR2: 00000000004c0de8 CR3: 00000001d490d000 CR4: 00000000001406f0 [ 41.657295][ T12] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.665244][ T12] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.673188][ T12] Call Trace: [ 41.676458][ T12] cdc_ncm_update_rxtx_max+0x8e9/0xef0 [ 41.681890][ T12] ? cdc_ncm_select_altsetting+0x1a0/0x1a0 [ 41.687707][ T12] cdc_ncm_bind_common+0x1005/0x2570 [ 41.692980][ T12] ? cdc_ncm_align_tail+0x1b0/0x1b0 [ 41.698156][ T12] ? __debug_object_init+0x47c/0xdd0 [ 41.703589][ T12] ? lockdep_init_map+0x1b0/0x5e0 [ 41.708588][ T12] cdc_ncm_bind+0x7c/0x1c0 [ 41.712979][ T12] ? cdc_ncm_bind_common+0x2570/0x2570 [ 41.718426][ T12] usbnet_probe+0xb43/0x23cf [ 41.723006][ T12] usb_probe_interface+0x305/0x7a0 [ 41.728108][ T12] ? usb_probe_device+0x100/0x100 [ 41.733117][ T12] really_probe+0x281/0x6d0 [ 41.737601][ T12] driver_probe_device+0x101/0x1b0 [ 41.742691][ T12] __device_attach_driver+0x1c2/0x220 [ 41.748037][ T12] ? driver_allows_async_probing+0x160/0x160 [ 41.753991][ T12] bus_for_each_drv+0x162/0x1e0 [ 41.758815][ T12] ? bus_rescan_devices+0x20/0x20 [ 41.763823][ T12] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 41.769618][ T12] ? lockdep_hardirqs_on+0x379/0x580 [ 41.774888][ T12] __device_attach+0x217/0x360 [ 41.779630][ T12] ? device_bind_driver+0xd0/0xd0 [ 41.784633][ T12] ? kobject_uevent_env+0x29e/0x1150 [ 41.789996][ T12] ? kobject_uevent_env+0x2a8/0x1150 [ 41.795346][ T12] bus_probe_device+0x1e4/0x290 [ 41.800188][ T12] ? blocking_notifier_call_chain+0x54/0xa0 [ 41.806063][ T12] device_add+0xae6/0x16f0 [ 41.810543][ T12] ? uevent_store+0x50/0x50 [ 41.815024][ T12] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 41.820863][ T12] usb_set_configuration+0xdf6/0x1670 [ 41.826210][ T12] generic_probe+0x9d/0xd5 [ 41.830629][ T12] usb_probe_device+0x99/0x100 [ 41.835475][ T12] ? usb_suspend+0x620/0x620 [ 41.840147][ T12] really_probe+0x281/0x6d0 [ 41.844638][ T12] driver_probe_device+0x101/0x1b0 [ 41.849737][ T12] __device_attach_driver+0x1c2/0x220 [ 41.855210][ T12] ? driver_allows_async_probing+0x160/0x160 [ 41.861169][ T12] bus_for_each_drv+0x162/0x1e0 [ 41.865998][ T12] ? bus_rescan_devices+0x20/0x20 [ 41.871087][ T12] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 41.876913][ T12] ? lockdep_hardirqs_on+0x379/0x580 [ 41.882173][ T12] __device_attach+0x217/0x360 [ 41.888497][ T12] ? device_bind_driver+0xd0/0xd0 [ 41.893506][ T12] ? kobject_uevent_env+0x29e/0x1150 [ 41.898778][ T12] ? kobject_uevent_env+0x2a8/0x1150 [ 41.904037][ T12] bus_probe_device+0x1e4/0x290 [ 41.908859][ T12] ? blocking_notifier_call_chain+0x54/0xa0 [ 41.914725][ T12] device_add+0xae6/0x16f0 [ 41.919112][ T12] ? uevent_store+0x50/0x50 [ 41.923591][ T12] usb_new_device.cold+0x6a4/0xe79 [ 41.928696][ T12] hub_event+0x1b5c/0x3640 [ 41.933086][ T12] ? hu