[info] Using makefile-style concurrent boot in runlevel 2. [ 15.495916][ C1] random: crng init done [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] 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 '10.128.1.31' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 23.198925][ T17] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 23.569010][ T17] usb 1-1: config 1 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 23.580009][ T17] usb 1-1: config 1 interface 1 altsetting 1 bulk endpoint 0x82 has invalid maxpacket 0 [ 23.589777][ T17] usb 1-1: config 1 interface 1 altsetting 1 bulk endpoint 0x3 has invalid maxpacket 0 [ 23.758974][ T17] usb 1-1: New USB device found, idVendor=0525, idProduct=a4a1, bcdDevice= 0.40 [ 23.768015][ T17] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 23.776039][ T17] usb 1-1: Product: syz [ 23.780313][ T17] usb 1-1: Manufacturer: syz [ 23.784931][ T17] usb 1-1: SerialNumber: syz [ 24.928995][ T17] cdc_ncm 1-1:1.0: MAC-Address: 42:42:42:42:42:42 [ 24.935518][ T17] cdc_ncm 1-1:1.0: setting rx_max = 16384 [ 25.138924][ T17] cdc_ncm 1-1:1.0: setting tx_max = 16384 [ 25.144679][ T17] divide error: 0000 [#1] SMP KASAN [ 25.149891][ T17] CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.3.0+ #0 [ 25.156886][ T17] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.166937][ T17] Workqueue: usb_hub_wq hub_event [ 25.171949][ T17] RIP: 0010:cdc_ncm_update_rxtx_max+0xc6e/0xef0 [ 25.178170][ T17] Code: e0 07 38 c2 0f 9e c1 84 d2 0f 95 c0 84 c1 0f 85 35 02 00 00 0f b7 5b 04 81 e3 ff 07 00 00 e8 79 19 f4 fd 31 d2 44 89 e0 31 ff f3 41 89 d5 89 d6 e8 d6 1a f4 fd 45 85 ed 0f 85 17 f7 ff ff e8 [ 25.197863][ T17] RSP: 0018:ffff8881da24f020 EFLAGS: 00010246 [ 25.204051][ T17] RAX: 0000000000004000 RBX: 0000000000000000 RCX: 0000000000000001 [ 25.212016][ T17] RDX: 0000000000000000 RSI: ffffffff834a2327 RDI: 0000000000000000 [ 25.219978][ T17] RBP: ffff8881d9136e80 R08: ffff8881da233000 R09: ffffed103b665d58 [ 25.227926][ T17] R10: ffffed103b665d57 R11: ffff8881db32eabf R12: 0000000000004000 [ 25.235881][ T17] R13: 0000000000000000 R14: ffff8881d616cec0 R15: ffff8881d349e780 [ 25.243833][ T17] FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 [ 25.252744][ T17] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.259303][ T17] CR2: 00007fb68121a000 CR3: 00000001d4819000 CR4: 00000000001406e0 [ 25.267257][ T17] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.275429][ T17] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.283389][ T17] Call Trace: [ 25.286667][ T17] ? cdc_ncm_select_altsetting+0x1a0/0x1a0 [ 25.292449][ T17] cdc_ncm_bind_common+0x1005/0x2570 [ 25.297708][ T17] ? cdc_ncm_align_tail+0x1b0/0x1b0 [ 25.302881][ T17] ? lockdep_init_map+0x1b0/0x5e0 [ 25.307902][ T17] cdc_ncm_bind+0x7c/0x1c0 [ 25.312302][ T17] ? cdc_ncm_bind_common+0x2570/0x2570 [ 25.317753][ T17] usbnet_probe+0xb43/0x23cf [ 25.322333][ T17] usb_probe_interface+0x305/0x7a0 [ 25.327481][ T17] ? usb_probe_device+0x100/0x100 [ 25.332531][ T17] really_probe+0x281/0x6d0 [ 25.337057][ T17] driver_probe_device+0x104/0x210 [ 25.342152][ T17] __device_attach_driver+0x1c2/0x220 [ 25.347506][ T17] ? driver_allows_async_probing+0x160/0x160 [ 25.353467][ T17] bus_for_each_drv+0x162/0x1e0 [ 25.358292][ T17] ? bus_rescan_devices+0x20/0x20 [ 25.363292][ T17] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 25.369069][ T17] ? lockdep_hardirqs_on+0x382/0x580 [ 25.374343][ T17] __device_attach+0x217/0x360 [ 25.379079][ T17] ? device_bind_driver+0xd0/0xd0 [ 25.384076][ T17] ? kobject_uevent_env+0x29e/0x1150 [ 25.389527][ T17] ? kobject_uevent_env+0x2a8/0x1150 [ 25.394783][ T17] bus_probe_device+0x1e4/0x290 [ 25.399693][ T17] ? blocking_notifier_call_chain+0x54/0xa0 [ 25.405556][ T17] device_add+0xae6/0x16f0 [ 25.409955][ T17] ? uevent_store+0x50/0x50 [ 25.414433][ T17] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 25.420999][ T17] usb_set_configuration+0xdf6/0x1670 [ 25.426344][ T17] generic_probe+0x9d/0xd5 [ 25.430733][ T17] usb_probe_device+0x99/0x100 [ 25.435468][ T17] ? usb_suspend+0x620/0x620 [ 25.440030][ T17] really_probe+0x281/0x6d0 [ 25.444505][ T17] driver_probe_device+0x104/0x210 [ 25.449589][ T17] __device_attach_driver+0x1c2/0x220 [ 25.454950][ T17] ? driver_allows_async_probing+0x160/0x160 [ 25.460926][ T17] bus_for_each_drv+0x162/0x1e0 [ 25.465759][ T17] ? bus_rescan_devices+0x20/0x20 [ 25.470772][ T17] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 25.476553][ T17] ? lockdep_hardirqs_on+0x382/0x580 [ 25.481810][ T17] __device_attach+0x217/0x360 [ 25.486546][ T17] ? device_bind_driver+0xd0/0xd0 [ 25.491556][ T17] ? kobject_uevent_env+0x29e/0x1150 [ 25.496838][ T17] ? kobject_uevent_env+0x2a8/0x1150 [ 25.502138][ T17] bus_probe_device+0x1e4/0x290 [ 25.507002][ T17] ? blocking_notifier_call_chain+0x54/0xa0 [ 25.513003][ T17] device_add+0xae6/0x16f0 [ 25.517395][ T17] ? uevent_store+0x50/0x50 [ 25.521889][ T17] usb_new_device.cold+0x6a4/0xe79 [ 25.526983][ T17] hub_event+0x1b5c/0x3640 [ 25.531379][ T17] ? hub_port_debounce+0x260/0x260 [ 25.536478][ T17] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 25.542006][ T17] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 25.547291][ T17] process_one_work+0x92b/0x1530 [ 25.552203][ T17] ? pwq_dec_nr_in_flight+0x310/0x310 [ 25.557558][ T17] ? do_raw_spin_lock+0x11a/0x280 [ 25.562556][ T17] worker_thread+0x96/0xe20 [ 25.567046][ T17] ? process_one_work+0x1530/0x1530 [ 25.572216][ T17] kthread+0x318/0x420 [ 25.576259][ T17] ? kthread_create_on_node+0xf0/0xf0 [ 25.581604][ T17] ret_from_fork+0x24/0x30 [ 25.585998][ T17] Modules linked in: [ 25.589955][ T17] ---[ end trace 56161f58ce1a2b04 ]--- [ 25.595420][ T17] RIP: 0010:cdc_ncm_update_rxtx_max+0xc6e/0xef0 [ 25.601678][ T17] Code: e0 07 38 c2 0f 9e c1 84 d2 0f 95 c0 84 c1 0f 85 35 02 00 00 0f b7 5b 04 81 e3 ff 07 00 00 e8 79 19 f4 fd 31 d2 44 89 e0 31 ff f3 41 89 d5 89 d6 e8 d6 1a f4 fd 45 85 ed 0f 85 17 f7 ff ff e8 [ 25.621284][ T17] RSP: 0018:ffff8881da24f020 EFLAGS: 00010246 [ 25.627327][ T17] RAX: 0000000000004000 RBX: 0000000000000000 RCX: 0000000000000001 [ 25.635310][ T17] RDX: 0000000000000000 RSI: ffffffff834a2327 RDI: 0000000000000000 [ 25.643283][ T17] RBP: ffff8881d9136e80 R08: ffff8881da233000 R09: ffffed103b665d58 [ 25.651255][ T17] R10: ffffed103b665d57 R11: ffff8881db32eabf R12: 0000000000004000 [ 25.659226][ T17] R13: 0000000000000000 R14: ffff8881d616cec0 R15: ffff8881d349e780 [ 25.667187][ T17] FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 [ 25.676844][ T17] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.683462][ T17] CR2: 00007fb68121a000 CR3: 00000001d4819000 CR4: 00000000001406e0 [ 25.691443][ T17] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.699420][ T17] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.707374][ T17] Kernel panic - not syncing: Fatal exception [ 25.713470][ T17] Kernel Offset: disabled [ 25.717776][ T17] Rebooting in 86400 seconds..