[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 15.292511][ 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 '10.128.1.48' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 22.717647][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 23.077745][ T12] usb 1-1: config 1 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 23.088752][ T12] usb 1-1: config 1 interface 1 altsetting 1 bulk endpoint 0x82 has invalid maxpacket 0 [ 23.098499][ T12] usb 1-1: config 1 interface 1 altsetting 1 bulk endpoint 0x3 has invalid maxpacket 0 [ 23.267751][ T12] usb 1-1: New USB device found, idVendor=0525, idProduct=a4a1, bcdDevice= 0.40 [ 23.276880][ T12] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 23.284900][ T12] usb 1-1: Product: syz [ 23.289123][ T12] usb 1-1: Manufacturer: syz [ 23.293700][ T12] usb 1-1: SerialNumber: syz [ 24.437720][ T12] cdc_ncm 1-1:1.0: MAC-Address: 42:42:42:42:42:42 [ 24.444220][ T12] cdc_ncm 1-1:1.0: dwNtbInMaxSize=0 is too small. Using 2048 [ 24.451634][ T12] cdc_ncm 1-1:1.0: setting rx_max = 2048 [ 24.647678][ T12] divide error: 0000 [#1] SMP KASAN [ 24.652921][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.3.0-rc7+ #0 [ 24.660260][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.670317][ T12] Workqueue: usb_hub_wq hub_event [ 24.675338][ T12] RIP: 0010:usbnet_update_max_qlen+0x231/0x370 [ 24.681497][ 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 [ 24.701072][ T12] RSP: 0018:ffff8881da20f010 EFLAGS: 00010246 [ 24.707110][ T12] RAX: 00000000000163c8 RBX: ffff8881d7abcec0 RCX: ffff8881d7abcfb4 [ 24.715056][ T12] RDX: 0000000000000000 RSI: ffffffff8344ecde RDI: ffff8881d7abcfb4 [ 24.723002][ T12] RBP: 0000000000000003 R08: ffff8881da1f9800 R09: ffffed103af5788a [ 24.730953][ T12] R10: ffffed103af57889 R11: ffff8881d7abc44f R12: 0000000000000000 [ 24.738897][ T12] R13: ffff8881d7abd038 R14: ffff8881d7abcec0 R15: ffff8881d33c8000 [ 24.746850][ T12] FS: 0000000000000000(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 [ 24.755762][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.762329][ T12] CR2: 00007fbda766d000 CR3: 00000001d42f3000 CR4: 00000000001406f0 [ 24.770287][ T12] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.778230][ T12] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.786170][ T12] Call Trace: [ 24.789440][ T12] cdc_ncm_update_rxtx_max+0x8e9/0xef0 [ 24.794880][ T12] ? cdc_ncm_select_altsetting+0x1a0/0x1a0 [ 24.800656][ T12] cdc_ncm_bind_common+0x1005/0x2570 [ 24.805912][ T12] ? cdc_ncm_align_tail+0x1b0/0x1b0 [ 24.811094][ T12] ? __debug_object_init+0x47c/0xdd0 [ 24.816382][ T12] ? lockdep_init_map+0x1b0/0x5e0 [ 24.821377][ T12] cdc_ncm_bind+0x7c/0x1c0 [ 24.825774][ T12] ? cdc_ncm_bind_common+0x2570/0x2570 [ 24.831212][ T12] usbnet_probe+0xb43/0x23cf [ 24.835783][ T12] usb_probe_interface+0x305/0x7a0 [ 24.840871][ T12] ? usb_probe_device+0x100/0x100 [ 24.845865][ T12] really_probe+0x281/0x6d0 [ 24.850339][ T12] driver_probe_device+0x101/0x1b0 [ 24.855479][ T12] __device_attach_driver+0x1c2/0x220 [ 24.860835][ T12] ? driver_allows_async_probing+0x160/0x160 [ 24.866787][ T12] bus_for_each_drv+0x162/0x1e0 [ 24.871611][ T12] ? bus_rescan_devices+0x20/0x20 [ 24.876606][ T12] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 24.882388][ T12] ? lockdep_hardirqs_on+0x379/0x580 [ 24.887677][ T12] __device_attach+0x217/0x360 [ 24.892440][ T12] ? device_bind_driver+0xd0/0xd0 [ 24.897446][ T12] ? kobject_uevent_env+0x29e/0x1150 [ 24.902704][ T12] ? kobject_uevent_env+0x2a8/0x1150 [ 24.908307][ T12] bus_probe_device+0x1e4/0x290 [ 24.913136][ T12] ? blocking_notifier_call_chain+0x54/0xa0 [ 24.919000][ T12] device_add+0xae6/0x16f0 [ 24.923388][ T12] ? uevent_store+0x50/0x50 [ 24.927866][ T12] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 24.934617][ T12] usb_set_configuration+0xdf6/0x1670 [ 24.939962][ T12] generic_probe+0x9d/0xd5 [ 24.944347][ T12] usb_probe_device+0x99/0x100 [ 24.949082][ T12] ? usb_suspend+0x620/0x620 [ 24.953643][ T12] really_probe+0x281/0x6d0 [ 24.958130][ T12] driver_probe_device+0x101/0x1b0 [ 24.963390][ T12] __device_attach_driver+0x1c2/0x220 [ 24.968748][ T12] ? driver_allows_async_probing+0x160/0x160 [ 24.974698][ T12] bus_for_each_drv+0x162/0x1e0 [ 24.979519][ T12] ? bus_rescan_devices+0x20/0x20 [ 24.984526][ T12] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 24.990305][ T12] ? lockdep_hardirqs_on+0x379/0x580 [ 24.995560][ T12] __device_attach+0x217/0x360 [ 25.000295][ T12] ? device_bind_driver+0xd0/0xd0 [ 25.005293][ T12] ? kobject_uevent_env+0x29e/0x1150 [ 25.010550][ T12] ? kobject_uevent_env+0x2a8/0x1150 [ 25.015817][ T12] bus_probe_device+0x1e4/0x290 [ 25.020641][ T12] ? blocking_notifier_call_chain+0x54/0xa0 [ 25.026505][ T12] device_add+0xae6/0x16f0 [ 25.030894][ T12] ? uevent_store+0x50/0x50 [ 25.035369][ T12] usb_new_device.cold+0x6a4/0xe79 [ 25.040464][ T12] hub_event+0x1b5c/0x3640 [ 25.044864][ T12] ? hub_port_debounce+0x260/0x260 [ 25.049948][ T12] process_one_work+0x92b/0x1530 [ 25.054868][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 25.060210][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 25.065204][ T12] worker_thread+0x96/0xe20 [ 25.069691][ T12] ? process_one_work+0x1530/0x1530 [ 25.074867][ T12] kthread+0x318/0x420 [ 25.078907][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 25.084259][ T12] ret_from_fork+0x24/0x30 [ 25.088642][ T12] Modules linked in: [ 25.092579][ T12] ---[ end trace 691047b908aae8e0 ]--- [ 25.098054][ T12] RIP: 0010:usbnet_update_max_qlen+0x231/0x370 [ 25.104192][ 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 [ 25.123798][ T12] RSP: 0018:ffff8881da20f010 EFLAGS: 00010246 [ 25.129863][ T12] RAX: 00000000000163c8 RBX: ffff8881d7abcec0 RCX: ffff8881d7abcfb4 [ 25.137832][ T12] RDX: 0000000000000000 RSI: ffffffff8344ecde RDI: ffff8881d7abcfb4 [ 25.145792][ T12] RBP: 0000000000000003 R08: ffff8881da1f9800 R09: ffffed103af5788a [ 25.153769][ T12] R10: ffffed103af57889 R11: ffff8881d7abc44f R12: 0000000000000000 [ 25.161747][ T12] R13: ffff8881d7abd038 R14: ffff8881d7abcec0 R15: ffff8881d33c8000 [ 25.169719][ T12] FS: 0000000000000000(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 [ 25.178646][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.185204][ T12] CR2: 00007fbda766d000 CR3: 00000001d42f3000 CR4: 00000000001406f0 [ 25.193182][ T12] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.201153][ T12] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.209123][ T12] Kernel panic - not syncing: Fatal exception [ 25.215264][ T12] Kernel Offset: disabled [ 25.219574][ T12] Rebooting in 86400 seconds..