[[36minfo[39;49m] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 15.910658][ C1] random: crng init done [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.81' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 31.984253][ T83] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 32.234657][ T83] usb 1-1: Using ep0 maxpacket: 8 [ 32.354378][ T83] usb 1-1: New USB device found, idVendor=0af0, idProduct=6731, bcdDevice= 5.8b [ 32.363527][ T83] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 32.377122][ T83] usb 1-1: config 0 descriptor?? [ 32.415636][ T83] hso 1-1:0.0: Can't find BULK IN endpoint [ 32.423004][ T83] ------------[ cut here ]------------ [ 32.428988][ T83] WARNING: CPU: 1 PID: 83 at net/core/dev.c:8488 rollback_registered_many+0x1df/0xe00 [ 32.439392][ T83] Kernel panic - not syncing: panic_on_warn set ... [ 32.445971][ T83] CPU: 1 PID: 83 Comm: kworker/1:2 Not tainted 5.4.0-rc6+ #0 [ 32.453723][ T83] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.464007][ T83] Workqueue: usb_hub_wq hub_event [ 32.469741][ T83] Call Trace: [ 32.473028][ T83] dump_stack+0xca/0x13e [ 32.479208][ T83] ? rollback_registered_many+0xf0/0xe00 [ 32.485717][ T83] panic+0x2aa/0x6e1 [ 32.489612][ T83] ? add_taint.cold+0x16/0x16 [ 32.494278][ T83] ? printk+0xba/0xed [ 32.498254][ T83] ? kmsg_dump_rewind_nolock+0xd9/0xd9 [ 32.503701][ T83] ? __warn.cold+0x14/0x33 [ 32.511350][ T83] ? __warn+0xd5/0x1d0 [ 32.515414][ T83] ? rollback_registered_many+0x1df/0xe00 [ 32.523613][ T83] __warn.cold+0x2f/0x33 [ 32.528244][ T83] ? rollback_registered_many+0x1df/0xe00 [ 32.536889][ T83] report_bug+0x27b/0x2f0 [ 32.541252][ T83] do_error_trap+0x12b/0x1e0 [ 32.546042][ T83] ? rollback_registered_many+0x1df/0xe00 [ 32.551809][ T83] do_invalid_op+0x32/0x40 [ 32.556260][ T83] ? rollback_registered_many+0x1df/0xe00 [ 32.561962][ T83] invalid_op+0x23/0x30 [ 32.566110][ T83] RIP: 0010:rollback_registered_many+0x1df/0xe00 [ 32.572784][ T83] Code: 84 c0 74 06 0f 8e 39 0a 00 00 44 0f b6 bb 28 05 00 00 31 ff 44 89 fe e8 af 4d 8f fc 45 84 ff 0f 85 49 ff ff ff e8 71 4c 8f fc <0f> 0b 4c 89 e7 e8 b7 b6 34 fd 31 ff 41 89 c4 89 c6 e8 8b 4d 8f fc [ 32.593288][ T83] RSP: 0018:ffff8881d89f7038 EFLAGS: 00010293 [ 32.599383][ T83] RAX: ffff8881d89e8000 RBX: ffff8881cf9d6000 RCX: ffffffff84aed9e1 [ 32.607357][ T83] RDX: 0000000000000000 RSI: ffffffff84aed9ef RDI: 0000000000000001 [ 32.615319][ T83] RBP: ffff8881d89f7168 R08: ffff8881d89e8000 R09: fffffbfff0ee2b61 [ 32.623277][ T83] R10: fffffbfff0ee2b60 R11: ffffffff87715b07 R12: ffff8881cf9d6070 [ 32.631239][ T83] R13: ffff8881d89f70f8 R14: dffffc0000000000 R15: 0000000000000000 [ 32.639238][ T83] ? rollback_registered_many+0x1d1/0xe00 [ 32.647853][ T83] ? rollback_registered_many+0x1df/0xe00 [ 32.656136][ T83] ? rollback_registered_many+0x1df/0xe00 [ 32.663171][ T83] ? generic_xdp_install+0x480/0x480 [ 32.668981][ T83] ? __mutex_lock+0x430/0x1360 [ 32.673746][ T83] ? find_held_lock+0x2d/0x110 [ 32.678516][ T83] ? unregister_netdev+0xe/0x20 [ 32.683559][ T83] ? mutex_trylock+0x2c0/0x2c0 [ 32.688318][ T83] rollback_registered+0xf2/0x1c0 [ 32.693514][ T83] ? rollback_registered_many+0xe00/0xe00 [ 32.699219][ T83] ? _dev_crit+0x109/0x109 [ 32.703638][ T83] ? kasan_unpoison_shadow+0x30/0x40 [ 32.708909][ T83] unregister_netdevice_queue+0x1d7/0x2b0 [ 32.714642][ T83] unregister_netdev+0x18/0x20 [ 32.719485][ T83] hso_free_net_device+0xff/0x300 [ 32.725435][ T83] hso_create_net_device+0x76d/0x9c0 [ 32.730746][ T83] hso_probe+0x1019/0x1b7b [ 32.735397][ T83] usb_probe_interface+0x305/0x7a0 [ 32.740566][ T83] ? usb_probe_device+0x100/0x100 [ 32.745602][ T83] really_probe+0x281/0x6d0 [ 32.750119][ T83] driver_probe_device+0x104/0x210 [ 32.755465][ T83] __device_attach_driver+0x1c2/0x220 [ 32.760859][ T83] ? driver_allows_async_probing+0x160/0x160 [ 32.767097][ T83] bus_for_each_drv+0x162/0x1e0 [ 32.772067][ T83] ? bus_rescan_devices+0x20/0x20 [ 32.777086][ T83] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 32.782917][ T83] ? lockdep_hardirqs_on+0x382/0x580 [ 32.788726][ T83] __device_attach+0x217/0x360 [ 32.793484][ T83] ? device_bind_driver+0xd0/0xd0 [ 32.798500][ T83] ? kobject_uevent_env+0x29e/0x1160 [ 32.803930][ T83] ? kobject_uevent_env+0x2a8/0x1160 [ 32.809329][ T83] bus_probe_device+0x1e4/0x290 [ 32.814209][ T83] ? blocking_notifier_call_chain+0x54/0xa0 [ 32.820242][ T83] device_add+0xae6/0x16f0 [ 32.824720][ T83] ? uevent_store+0x50/0x50 [ 32.829219][ T83] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 32.835016][ T83] usb_set_configuration+0xdf6/0x1670 [ 32.840382][ T83] generic_probe+0x9d/0xd5 [ 32.844959][ T83] usb_probe_device+0x99/0x100 [ 32.849956][ T83] ? usb_suspend+0x620/0x620 [ 32.855096][ T83] really_probe+0x281/0x6d0 [ 32.859759][ T83] driver_probe_device+0x104/0x210 [ 32.865542][ T83] __device_attach_driver+0x1c2/0x220 [ 32.870920][ T83] ? driver_allows_async_probing+0x160/0x160 [ 32.877218][ T83] bus_for_each_drv+0x162/0x1e0 [ 32.882362][ T83] ? bus_rescan_devices+0x20/0x20 [ 32.887395][ T83] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 32.893244][ T83] ? lockdep_hardirqs_on+0x382/0x580 [ 32.898523][ T83] __device_attach+0x217/0x360 [ 32.903648][ T83] ? device_bind_driver+0xd0/0xd0 [ 32.908681][ T83] ? kobject_uevent_env+0x29e/0x1160 [ 32.914691][ T83] ? kobject_uevent_env+0x2a8/0x1160 [ 32.920031][ T83] bus_probe_device+0x1e4/0x290 [ 32.924935][ T83] ? blocking_notifier_call_chain+0x54/0xa0 [ 32.930964][ T83] device_add+0xae6/0x16f0 [ 32.935379][ T83] ? uevent_store+0x50/0x50 [ 32.940397][ T83] usb_new_device.cold+0x6a4/0xe79 [ 32.945518][ T83] hub_event+0x1df8/0x3800 [ 32.949927][ T83] ? hub_port_debounce+0x260/0x260 [ 32.955105][ T83] ? find_held_lock+0x2d/0x110 [ 32.959955][ T83] ? mark_held_locks+0xe0/0xe0 [ 32.965270][ T83] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 32.970803][ T83] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 32.976081][ T83] process_one_work+0x92b/0x1530 [ 32.981629][ T83] ? pwq_dec_nr_in_flight+0x310/0x310 [ 32.987179][ T83] ? do_raw_spin_lock+0x11a/0x280 [ 32.992369][ T83] worker_thread+0x96/0xe20 [ 32.996868][ T83] ? process_one_work+0x1530/0x1530 [ 33.002070][ T83] kthread+0x318/0x420 [ 33.006148][ T83] ? kthread_create_on_node+0xf0/0xf0 [ 33.011770][ T83] ret_from_fork+0x24/0x30 [ 33.017119][ T83] Kernel Offset: disabled [ 33.021508][ T83] Rebooting in 86400 seconds..