INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] 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 '10.128.10.5' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 34.675194][ T95] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 34.765372][ T95] usb 1-1: Using ep0 maxpacket: 32 [ 34.885690][ T95] usb 1-1: New USB device found, idVendor=0af0, idProduct=d257, bcdDevice=4e.87 [ 34.895160][ T95] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 34.905259][ T95] usb 1-1: config 0 descriptor?? [ 35.155348][ T95] hso 1-1:0.0: Can't find BULK IN endpoint [ 35.161754][ T95] ------------[ cut here ]------------ [ 35.167749][ T95] WARNING: CPU: 1 PID: 95 at net/core/dev.c:8774 rollback_registered_many+0x1ed/0xec0 [ 35.177600][ T95] Kernel panic - not syncing: panic_on_warn set ... [ 35.184183][ T95] CPU: 1 PID: 95 Comm: kworker/1:2 Not tainted 5.6.0-rc3-syzkaller #0 [ 35.192528][ T95] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.202728][ T95] Workqueue: usb_hub_wq hub_event [ 35.207750][ T95] Call Trace: [ 35.211140][ T95] dump_stack+0xef/0x16e [ 35.215505][ T95] ? rollback_registered_many+0x170/0xec0 [ 35.221224][ T95] panic+0x2aa/0x6e1 [ 35.225184][ T95] ? add_taint.cold+0x16/0x16 [ 35.229989][ T95] ? printk+0xba/0xed [ 35.233966][ T95] ? kmsg_dump_rewind_nolock+0xd9/0xd9 [ 35.239429][ T95] ? __warn.cold+0x14/0x30 [ 35.243952][ T95] ? __warn+0xd5/0x1c8 [ 35.248009][ T95] ? rollback_registered_many+0x1ed/0xec0 [ 35.253723][ T95] __warn.cold+0x2f/0x30 [ 35.257960][ T95] ? rollback_registered_many+0x1ed/0xec0 [ 35.263776][ T95] report_bug+0x27b/0x2f0 [ 35.268206][ T95] do_error_trap+0x12b/0x1e0 [ 35.272793][ T95] ? rollback_registered_many+0x1ed/0xec0 [ 35.278534][ T95] do_invalid_op+0x32/0x40 [ 35.282967][ T95] ? rollback_registered_many+0x1ed/0xec0 [ 35.288753][ T95] invalid_op+0x23/0x30 [ 35.292896][ T95] RIP: 0010:rollback_registered_many+0x1ed/0xec0 [ 35.299590][ T95] Code: 05 00 00 31 ff 44 89 fe e8 c0 81 79 fc 45 84 ff 0f 85 49 ff ff ff e8 82 80 79 fc 0f 1f 44 00 00 e8 78 80 79 fc e8 73 80 79 fc <0f> 0b 48 89 ef e8 79 d3 24 fd 31 ff 89 c5 89 c6 e8 8e 81 79 fc 40 [ 35.319188][ T95] RSP: 0018:ffff8881d5a86fe8 EFLAGS: 00010293 [ 35.325249][ T95] RAX: ffff8881d6c29880 RBX: ffff8881cdd64000 RCX: ffffffff84c5dc60 [ 35.333340][ T95] RDX: 0000000000000000 RSI: ffffffff84c5dc7d RDI: 0000000000000001 [ 35.341305][ T95] RBP: ffff8881cdd64068 R08: ffff8881d6c29880 R09: fffffbfff0f870a5 [ 35.349270][ T95] R10: fffffbfff0f870a4 R11: ffffffff87c38527 R12: ffff8881d5a87130 [ 35.357274][ T95] R13: dffffc0000000000 R14: ffff8881d5a870c8 R15: 0000000000000000 [ 35.365267][ T95] ? rollback_registered_many+0x1d0/0xec0 [ 35.372304][ T95] ? rollback_registered_many+0x1ed/0xec0 [ 35.378004][ T95] ? rollback_registered_many+0x1ed/0xec0 [ 35.383751][ T95] ? netif_set_real_num_tx_queues+0x710/0x710 [ 35.389824][ T95] ? __mutex_lock+0x42b/0x1360 [ 35.394572][ T95] ? find_held_lock+0x2d/0x110 [ 35.399321][ T95] ? unregister_netdev+0xe/0x20 [ 35.404162][ T95] ? mutex_trylock+0x2c0/0x2c0 [ 35.408910][ T95] rollback_registered+0xf2/0x1c0 [ 35.413922][ T95] ? rollback_registered_many+0xec0/0xec0 [ 35.419639][ T95] ? _dev_crit+0x109/0x109 [ 35.424044][ T95] ? kasan_unpoison_shadow+0x30/0x40 [ 35.429318][ T95] unregister_netdevice_queue+0x1d7/0x2b0 [ 35.435025][ T95] unregister_netdev+0x18/0x20 [ 35.439777][ T95] hso_free_net_device+0xff/0x300 [ 35.444787][ T95] hso_create_net_device+0x76d/0x9c0 [ 35.450068][ T95] hso_probe+0x28d/0x1b7b [ 35.454385][ T95] usb_probe_interface+0x310/0x800 [ 35.459488][ T95] ? usb_probe_device+0x230/0x230 [ 35.464545][ T95] really_probe+0x290/0xac0 [ 35.469048][ T95] driver_probe_device+0x223/0x350 [ 35.474191][ T95] __device_attach_driver+0x1d1/0x290 [ 35.479544][ T95] ? driver_allows_async_probing+0x160/0x160 [ 35.485506][ T95] bus_for_each_drv+0x162/0x1e0 [ 35.490360][ T95] ? bus_rescan_devices+0x20/0x20 [ 35.495368][ T95] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 35.501160][ T95] ? lockdep_hardirqs_on+0x382/0x580 [ 35.506431][ T95] __device_attach+0x217/0x390 [ 35.511183][ T95] ? device_bind_driver+0xd0/0xd0 [ 35.516231][ T95] bus_probe_device+0x1e4/0x290 [ 35.521071][ T95] device_add+0x1459/0x1bf0 [ 35.525569][ T95] ? wait_for_completion+0x3c0/0x3c0 [ 35.530850][ T95] ? device_link_remove+0x110/0x110 [ 35.536034][ T95] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 35.541828][ T95] usb_set_configuration+0xe47/0x17d0 [ 35.547191][ T95] usb_generic_driver_probe+0x9d/0xe0 [ 35.552581][ T95] usb_probe_device+0xd9/0x230 [ 35.557332][ T95] ? usb_suspend+0x5f0/0x5f0 [ 35.561991][ T95] really_probe+0x290/0xac0 [ 35.566481][ T95] driver_probe_device+0x223/0x350 [ 35.571575][ T95] __device_attach_driver+0x1d1/0x290 [ 35.576931][ T95] ? driver_allows_async_probing+0x160/0x160 [ 35.582909][ T95] bus_for_each_drv+0x162/0x1e0 [ 35.587749][ T95] ? bus_rescan_devices+0x20/0x20 [ 35.592757][ T95] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 35.598549][ T95] ? lockdep_hardirqs_on+0x382/0x580 [ 35.603818][ T95] __device_attach+0x217/0x390 [ 35.608563][ T95] ? device_bind_driver+0xd0/0xd0 [ 35.613568][ T95] bus_probe_device+0x1e4/0x290 [ 35.618499][ T95] device_add+0x1459/0x1bf0 [ 35.623474][ T95] ? device_link_remove+0x110/0x110 [ 35.628703][ T95] usb_new_device.cold+0x540/0xcd0 [ 35.633799][ T95] hub_event+0x21cb/0x4300 [ 35.638202][ T95] ? hub_port_debounce+0x350/0x350 [ 35.643298][ T95] ? find_held_lock+0x2d/0x110 [ 35.648134][ T95] ? mark_held_locks+0xe0/0xe0 [ 35.652901][ T95] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 35.658434][ T95] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 35.663710][ T95] process_one_work+0x94b/0x1620 [ 35.668637][ T95] ? pwq_dec_nr_in_flight+0x310/0x310 [ 35.674040][ T95] ? do_raw_spin_lock+0x129/0x290 [ 35.679061][ T95] worker_thread+0x96/0xe20 [ 35.683552][ T95] ? process_one_work+0x1620/0x1620 [ 35.688793][ T95] kthread+0x318/0x420 [ 35.692891][ T95] ? kthread_create_on_node+0xf0/0xf0 [ 35.698247][ T95] ret_from_fork+0x24/0x30 [ 35.703535][ T95] Kernel Offset: disabled [ 35.707893][ T95] Rebooting in 86400 seconds..