[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 15.197156][ C1] random: crng init done [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.43' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.721761][ T22] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 34.081848][ T22] usb 1-1: config 1 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 34.093012][ T22] usb 1-1: config 1 interface 1 altsetting 1 bulk endpoint 0x82 has invalid maxpacket 0 [ 34.102776][ T22] usb 1-1: config 1 interface 1 altsetting 1 bulk endpoint 0x3 has invalid maxpacket 0 [ 34.271819][ T22] usb 1-1: New USB device found, idVendor=0525, idProduct=a4a1, bcdDevice= 0.40 [ 34.280881][ T22] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 34.288926][ T22] usb 1-1: Product: syz [ 34.293111][ T22] usb 1-1: Manufacturer: syz [ 34.297771][ T22] usb 1-1: SerialNumber: syz [ 35.441873][ T22] cdc_ncm 1-1:1.0: MAC-Address: 42:42:42:42:42:42 [ 35.448358][ T22] cdc_ncm 1-1:1.0: dwNtbInMaxSize=0 is too small. Using 2048 [ 35.455792][ T22] cdc_ncm 1-1:1.0: setting rx_max = 2048 [ 35.651793][ T22] divide error: 0000 [#1] SMP KASAN [ 35.657024][ T22] CPU: 1 PID: 22 Comm: kworker/1:1 Not tainted 5.3.0-rc7+ #0 [ 35.664373][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.675453][ T22] Workqueue: usb_hub_wq hub_event [ 35.680457][ T22] RIP: 0010:usbnet_update_max_qlen+0x231/0x370 [ 35.706373][ T22] 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 [ 35.726126][ T22] RSP: 0018:ffff8881d9687010 EFLAGS: 00010246 [ 35.732167][ T22] RAX: 00000000000163c8 RBX: ffff8881d2ac4ec0 RCX: ffff8881d2ac4fb4 [ 35.740143][ T22] RDX: 0000000000000000 RSI: ffffffff8344ecde RDI: ffff8881d2ac4fb4 [ 35.748101][ T22] RBP: 0000000000000003 R08: ffff8881da236000 R09: ffffed103a55888a [ 35.756065][ T22] R10: ffffed103a558889 R11: ffff8881d2ac444f R12: 0000000000000000 [ 35.764024][ T22] R13: ffff8881d2ac5038 R14: ffff8881d2ac4ec0 R15: ffff8881d2abb400 [ 35.772034][ T22] FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 [ 35.780954][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.787518][ T22] CR2: 00000000004c0de8 CR3: 00000001d3889000 CR4: 00000000001406e0 [ 35.795466][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.803412][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.811357][ T22] Call Trace: [ 35.814637][ T22] cdc_ncm_update_rxtx_max+0x8e9/0xef0 [ 35.820068][ T22] ? cdc_ncm_select_altsetting+0x1a0/0x1a0 [ 35.825845][ T22] cdc_ncm_bind_common+0x1005/0x2570 [ 35.831101][ T22] ? cdc_ncm_align_tail+0x1b0/0x1b0 [ 35.836272][ T22] ? __debug_object_init+0x47c/0xdd0 [ 35.841548][ T22] ? lockdep_init_map+0x1b0/0x5e0 [ 35.846546][ T22] cdc_ncm_bind+0x7c/0x1c0 [ 35.850932][ T22] ? cdc_ncm_bind_common+0x2570/0x2570 [ 35.856385][ T22] usbnet_probe+0xb43/0x23cf [ 35.861383][ T22] usb_probe_interface+0x305/0x7a0 [ 35.866727][ T22] ? usb_probe_device+0x100/0x100 [ 35.871731][ T22] really_probe+0x281/0x6d0 [ 35.876218][ T22] driver_probe_device+0x101/0x1b0 [ 35.881310][ T22] __device_attach_driver+0x1c2/0x220 [ 35.886655][ T22] ? driver_allows_async_probing+0x160/0x160 [ 35.892779][ T22] bus_for_each_drv+0x162/0x1e0 [ 35.897613][ T22] ? bus_rescan_devices+0x20/0x20 [ 35.902613][ T22] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 35.908404][ T22] ? lockdep_hardirqs_on+0x379/0x580 [ 35.913687][ T22] __device_attach+0x217/0x360 [ 35.918433][ T22] ? device_bind_driver+0xd0/0xd0 [ 35.923452][ T22] ? kobject_uevent_env+0x29e/0x1150 [ 35.928715][ T22] ? kobject_uevent_env+0x2a8/0x1150 [ 35.933990][ T22] bus_probe_device+0x1e4/0x290 [ 35.938830][ T22] ? blocking_notifier_call_chain+0x54/0xa0 [ 35.944696][ T22] device_add+0xae6/0x16f0 [ 35.949171][ T22] ? uevent_store+0x50/0x50 [ 35.953648][ T22] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 35.960389][ T22] usb_set_configuration+0xdf6/0x1670 [ 35.965734][ T22] generic_probe+0x9d/0xd5 [ 35.970124][ T22] usb_probe_device+0x99/0x100 [ 35.974858][ T22] ? usb_suspend+0x620/0x620 [ 35.979430][ T22] really_probe+0x281/0x6d0 [ 35.983909][ T22] driver_probe_device+0x101/0x1b0 [ 35.988991][ T22] __device_attach_driver+0x1c2/0x220 [ 35.994350][ T22] ? driver_allows_async_probing+0x160/0x160 [ 36.000313][ T22] bus_for_each_drv+0x162/0x1e0 [ 36.005143][ T22] ? bus_rescan_devices+0x20/0x20 [ 36.010150][ T22] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 36.015939][ T22] ? lockdep_hardirqs_on+0x379/0x580 [ 36.021212][ T22] __device_attach+0x217/0x360 [ 36.025955][ T22] ? device_bind_driver+0xd0/0xd0 [ 36.030955][ T22] ? kobject_uevent_env+0x29e/0x1150 [ 36.036222][ T22] ? kobject_uevent_env+0x2a8/0x1150 [ 36.041481][ T22] bus_probe_device+0x1e4/0x290 [ 36.046317][ T22] ? blocking_notifier_call_chain+0x54/0xa0 [ 36.052195][ T22] device_add+0xae6/0x16f0 [ 36.056584][ T22] ? uevent_store+0x50/0x50 [ 36.061059][ T22] usb_new_device.cold+0x6a4/0xe79 [ 36.066158][ T22] hub_event+0x1b5c/0x3640 [ 36.070546][ T22] ? hub_port_debounce+0x260/0x260 [ 36.075641][ T22] process_one_work+0x92b/0x1530 [ 36.080551][ T22] ? pwq_dec_nr_in_flight+0x310/0x310 [ 36.085898][ T22] ? do_raw_spin_lock+0x11a/0x280 [ 36.090907][ T22] worker_thread+0x96/0xe20 [ 36.095383][ T22] ? process_one_work+0x1530/0x1530 [ 36.100577][ T22] kthread+0x318/0x420 [ 36.104626][ T22] ? kthread_create_on_node+0xf0/0xf0 [ 36.109987][ T22] ret_from_fork+0x24/0x30 [ 36.114371][ T22] Modules linked in: [ 36.118347][ T22] ---[ end trace 900f0247ed3bfaf5 ]--- [ 36.123841][ T22] RIP: 0010:usbnet_update_max_qlen+0x231/0x370 [ 36.129996][ T22] 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 [ 36.150927][ T22] RSP: 0018:ffff8881d9687010 EFLAGS: 00010246 [ 36.157001][ T22] RAX: 00000000000163c8 RBX: ffff8881d2ac4ec0 RCX: ffff8881d2ac4fb4 [ 36.164995][ T22] RDX: 0000000000000000 RSI: ffffffff8344ecde RDI: ffff8881d2ac4fb4 [ 36.172984][ T22] RBP: 0000000000000003 R08: ffff8881da236000 R09: ffffed103a55888a [ 36.181034][ T22] R10: ffffed103a558889 R11: ffff8881d2ac444f R12: 0000000000000000 [ 36.190661][ T22] R13: ffff8881d2ac5038 R14: ffff8881d2ac4ec0 R15: ffff8881d2abb400 [ 36.198656][ T22] FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 [ 36.207587][ T22] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.214187][ T22] CR2: 00000000004c0de8 CR3: 00000001d3889000 CR4: 00000000001406e0 [ 36.222178][ T22] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.230132][ T22] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.238103][ T22] Kernel panic - not syncing: Fatal exception [ 36.244904][ T22] Kernel Offset: disabled [ 36.249215][ T22] Rebooting in 86400 seconds..