[info] Using makefile-style concurrent boot in runlevel 2. [ 14.751401][ 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 '10.128.0.101' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 23.667402][ T94] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 23.757599][ T94] usb 1-1: Using ep0 maxpacket: 32 [ 23.877452][ T94] usb 1-1: New USB device found, idVendor=0af0, idProduct=d257, bcdDevice=4e.87 [ 23.886710][ T94] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 23.896628][ T94] usb 1-1: config 0 descriptor?? [ 24.157562][ T94] hso 1-1:0.0: Can't find BULK IN endpoint [ 24.163583][ T94] ------------[ cut here ]------------ [ 24.169091][ T94] WARNING: CPU: 0 PID: 94 at net/core/dev.c:8774 rollback_registered_many+0x1ed/0xec0 [ 24.178613][ T94] Kernel panic - not syncing: panic_on_warn set ... [ 24.185192][ T94] CPU: 0 PID: 94 Comm: kworker/0:2 Not tainted 5.6.0-rc3-syzkaller #0 [ 24.193328][ T94] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.203518][ T94] Workqueue: usb_hub_wq hub_event [ 24.208537][ T94] Call Trace: [ 24.211822][ T94] dump_stack+0xef/0x16e [ 24.216130][ T94] ? rollback_registered_many+0x170/0xec0 [ 24.221827][ T94] panic+0x2aa/0x6e1 [ 24.225702][ T94] ? add_taint.cold+0x16/0x16 [ 24.230476][ T94] ? printk+0xba/0xed [ 24.234469][ T94] ? kmsg_dump_rewind_nolock+0xd9/0xd9 [ 24.239920][ T94] ? __warn.cold+0x14/0x30 [ 24.244337][ T94] ? __warn+0xd5/0x1c8 [ 24.248492][ T94] ? rollback_registered_many+0x1ed/0xec0 [ 24.256060][ T94] __warn.cold+0x2f/0x30 [ 24.260290][ T94] ? rollback_registered_many+0x1ed/0xec0 [ 24.265985][ T94] report_bug+0x27b/0x2f0 [ 24.270309][ T94] do_error_trap+0x12b/0x1e0 [ 24.274885][ T94] ? rollback_registered_many+0x1ed/0xec0 [ 24.280580][ T94] do_invalid_op+0x32/0x40 [ 24.284981][ T94] ? rollback_registered_many+0x1ed/0xec0 [ 24.290858][ T94] invalid_op+0x23/0x30 [ 24.294992][ T94] RIP: 0010:rollback_registered_many+0x1ed/0xec0 [ 24.301305][ T94] 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 [ 24.320899][ T94] RSP: 0018:ffff8881d5ccefe8 EFLAGS: 00010293 [ 24.326967][ T94] RAX: ffff8881d6a59880 RBX: ffff8881ce50c000 RCX: ffffffff84c5dc60 [ 24.334932][ T94] RDX: 0000000000000000 RSI: ffffffff84c5dc7d RDI: 0000000000000001 [ 24.342904][ T94] RBP: ffff8881ce50c068 R08: ffff8881d6a59880 R09: fffffbfff0f870a5 [ 24.350863][ T94] R10: fffffbfff0f870a4 R11: ffffffff87c38527 R12: ffff8881d5ccf130 [ 24.358844][ T94] R13: dffffc0000000000 R14: ffff8881d5ccf0c8 R15: 0000000000000000 [ 24.367253][ T94] ? rollback_registered_many+0x1d0/0xec0 [ 24.372948][ T94] ? rollback_registered_many+0x1ed/0xec0 [ 24.378646][ T94] ? rollback_registered_many+0x1ed/0xec0 [ 24.384359][ T94] ? netif_set_real_num_tx_queues+0x710/0x710 [ 24.390409][ T94] ? __mutex_lock+0x42b/0x1360 [ 24.395149][ T94] ? find_held_lock+0x2d/0x110 [ 24.399888][ T94] ? unregister_netdev+0xe/0x20 [ 24.404713][ T94] ? mutex_trylock+0x2c0/0x2c0 [ 24.409473][ T94] rollback_registered+0xf2/0x1c0 [ 24.414487][ T94] ? rollback_registered_many+0xec0/0xec0 [ 24.420228][ T94] ? _dev_crit+0x109/0x109 [ 24.424635][ T94] ? kasan_unpoison_shadow+0x30/0x40 [ 24.429900][ T94] unregister_netdevice_queue+0x1d7/0x2b0 [ 24.435624][ T94] unregister_netdev+0x18/0x20 [ 24.440367][ T94] hso_free_net_device+0xff/0x300 [ 24.445366][ T94] hso_create_net_device+0x76d/0x9c0 [ 24.450637][ T94] hso_probe+0x28d/0x1b7b [ 24.454948][ T94] usb_probe_interface+0x310/0x800 [ 24.460043][ T94] ? usb_probe_device+0x230/0x230 [ 24.465054][ T94] really_probe+0x290/0xac0 [ 24.469533][ T94] driver_probe_device+0x223/0x350 [ 24.474627][ T94] __device_attach_driver+0x1d1/0x290 [ 24.479998][ T94] ? driver_allows_async_probing+0x160/0x160 [ 24.485986][ T94] bus_for_each_drv+0x162/0x1e0 [ 24.490822][ T94] ? bus_rescan_devices+0x20/0x20 [ 24.495856][ T94] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 24.501744][ T94] ? lockdep_hardirqs_on+0x382/0x580 [ 24.507023][ T94] __device_attach+0x217/0x390 [ 24.512149][ T94] ? device_bind_driver+0xd0/0xd0 [ 24.517192][ T94] bus_probe_device+0x1e4/0x290 [ 24.522110][ T94] device_add+0x1459/0x1bf0 [ 24.526608][ T94] ? wait_for_completion+0x3c0/0x3c0 [ 24.531890][ T94] ? device_link_remove+0x110/0x110 [ 24.537486][ T94] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 24.543430][ T94] usb_set_configuration+0xe47/0x17d0 [ 24.548814][ T94] usb_generic_driver_probe+0x9d/0xe0 [ 24.554172][ T94] usb_probe_device+0xd9/0x230 [ 24.559095][ T94] ? usb_suspend+0x5f0/0x5f0 [ 24.563757][ T94] really_probe+0x290/0xac0 [ 24.568253][ T94] driver_probe_device+0x223/0x350 [ 24.573449][ T94] __device_attach_driver+0x1d1/0x290 [ 24.578922][ T94] ? driver_allows_async_probing+0x160/0x160 [ 24.585115][ T94] bus_for_each_drv+0x162/0x1e0 [ 24.590082][ T94] ? bus_rescan_devices+0x20/0x20 [ 24.595200][ T94] ? _raw_spin_unlock_irqrestore+0x39/0x40 [ 24.601050][ T94] ? lockdep_hardirqs_on+0x382/0x580 [ 24.606334][ T94] __device_attach+0x217/0x390 [ 24.611086][ T94] ? device_bind_driver+0xd0/0xd0 [ 24.616102][ T94] bus_probe_device+0x1e4/0x290 [ 24.620945][ T94] device_add+0x1459/0x1bf0 [ 24.625460][ T94] ? device_link_remove+0x110/0x110 [ 24.630655][ T94] usb_new_device.cold+0x540/0xcd0 [ 24.635756][ T94] hub_event+0x21cb/0x4300 [ 24.640149][ T94] ? hub_port_debounce+0x350/0x350 [ 24.645245][ T94] ? find_held_lock+0x2d/0x110 [ 24.651211][ T94] ? mark_held_locks+0xe0/0xe0 [ 24.655970][ T94] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 24.661596][ T94] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 24.666864][ T94] process_one_work+0x94b/0x1620 [ 24.671779][ T94] ? pwq_dec_nr_in_flight+0x310/0x310 [ 24.677135][ T94] ? do_raw_spin_lock+0x129/0x290 [ 24.682135][ T94] worker_thread+0x96/0xe20 [ 24.686614][ T94] ? process_one_work+0x1620/0x1620 [ 24.691809][ T94] kthread+0x318/0x420 [ 24.695862][ T94] ? kthread_create_on_node+0xf0/0xf0 [ 24.701230][ T94] ret_from_fork+0x24/0x30 [ 24.706609][ T94] Kernel Offset: disabled [ 24.710992][ T94] Rebooting in 86400 seconds..