[[0;32m OK [0m] Started Getty on tty4.
[[0;32m OK [0m] Started Getty on tty3.
[[0;32m OK [0m] Started Getty on tty1.
[[0;32m OK [0m] Started Serial Getty on ttyS0.
[[0;32m OK [0m] Started Getty on tty2.
[[0;32m OK [0m] Reached target Login Prompts.
[[0;32m OK [0m] Reached target Multi-User System.
[[0;32m OK [0m] Reached target Graphical Interface.
Starting Update UTMP about System Runlevel Changes...
[[0;32m OK [0m] Started Update UTMP about System Runlevel Changes.
Starting Load/Save RF Kill Switch Status...
[[0;32m OK [0m] Started Load/Save RF Kill Switch Status.
Debian GNU/Linux 9 syzkaller ttyS0
Warning: Permanently added '10.128.1.56' (ECDSA) to the list of known hosts.
2020/04/19 11:27:56 fuzzer started
2020/04/19 11:27:58 connecting to host at 10.128.0.26:32923
2020/04/19 11:27:58 checking machine...
2020/04/19 11:27:58 checking revisions...
2020/04/19 11:27:58 testing simple program...
syzkaller login: [ 58.147343][ T6855] IPVS: ftp: loaded support on port[0] = 21
2020/04/19 11:27:59 building call list...
[ 58.367525][ T6806]
[ 58.370007][ T6806] =============================
[ 58.374864][ T6806] WARNING: suspicious RCU usage
[ 58.381445][ T6806] 5.7.0-rc1-next-20200417-syzkaller #0 Not tainted
[ 58.390898][ T6806] -----------------------------
[ 58.395881][ T6806] net/openvswitch/conntrack.c:1898 RCU-list traversed in non-reader section!!
[ 58.406067][ T6806]
[ 58.406067][ T6806] other info that might help us debug this:
[ 58.406067][ T6806]
[ 58.417587][ T6806]
[ 58.417587][ T6806] rcu_scheduler_active = 2, debug_locks = 1
[ 58.425660][ T6806] 3 locks held by kworker/u4:6/6806:
[ 58.433159][ T6806] #0: ffff8880a977a138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x844/0x16a0
[ 58.445451][ T6806] #1: ffffc9000565fdc0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x878/0x16a0
[ 58.459584][ T6806] #2: ffffffff8a5a08f0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xa50
[ 58.469767][ T6806]
[ 58.469767][ T6806] stack backtrace:
[ 58.475737][ T6806] CPU: 1 PID: 6806 Comm: kworker/u4:6 Not tainted 5.7.0-rc1-next-20200417-syzkaller #0
[ 58.485359][ T6806] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 58.495428][ T6806] Workqueue: netns cleanup_net
[ 58.500187][ T6806] Call Trace:
[ 58.503479][ T6806] dump_stack+0x188/0x20d
[ 58.507813][ T6806] ovs_ct_exit+0x3db/0x558
[ 58.512330][ T6806] ovs_exit_net+0x1df/0xba0
[ 58.516871][ T6806] ? synchronize_rcu.part.0+0xda/0xf0
[ 58.522607][ T6806] ? synchronize_rcu_expedited+0x620/0x620
[ 58.528428][ T6806] ? ovs_dp_cmd_del+0x270/0x270
[ 58.533293][ T6806] ? ovs_dp_cmd_del+0x270/0x270
[ 58.538271][ T6806] ops_exit_list.isra.0+0xa8/0x150
[ 58.543397][ T6806] cleanup_net+0x511/0xa50
[ 58.547818][ T6806] ? unregister_pernet_device+0x70/0x70
[ 58.553384][ T6806] ? rcu_read_lock_any_held.part.0+0x50/0x50
[ 58.559361][ T6806] ? _raw_spin_unlock_irq+0x1f/0x80
[ 58.564571][ T6806] process_one_work+0x965/0x16a0
[ 58.569521][ T6806] ? lock_release+0x800/0x800
[ 58.574307][ T6806] ? pwq_dec_nr_in_flight+0x310/0x310
[ 58.580372][ T6806] ? rwlock_bug.part.0+0x90/0x90
[ 58.585320][ T6806] worker_thread+0x96/0xe20
[ 58.589864][ T6806] ? process_one_work+0x16a0/0x16a0
[ 58.595167][ T6806] kthread+0x388/0x470
[ 58.599241][ T6806] ? kthread_mod_delayed_work+0x1a0/0x1a0
[ 58.604964][ T6806] ret_from_fork+0x24/0x30
[ 58.797022][ T6806] tipc: TX() has been purged, node left!
[ 58.849200][ T6806]
[ 58.851804][ T6806] =============================
[ 58.856674][ T6806] WARNING: suspicious RCU usage
[ 58.864171][ T6806] 5.7.0-rc1-next-20200417-syzkaller #0 Not tainted
[ 58.871652][ T6806] -----------------------------
[ 58.876550][ T6806] net/ipv4/ipmr.c:1757 RCU-list traversed in non-reader section!!
[ 58.886757][ T6806]
[ 58.886757][ T6806] other info that might help us debug this:
[ 58.886757][ T6806]
[ 58.898516][ T6806]
[ 58.898516][ T6806] rcu_scheduler_active = 2, debug_locks = 1
[ 58.906676][ T6806] 4 locks held by kworker/u4:6/6806:
[ 58.913391][ T6806] #0: ffff8880a977a138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x844/0x16a0
[ 58.924727][ T6806] #1: ffffc9000565fdc0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x878/0x16a0
[ 58.935726][ T6806] #2: ffffffff8a5a08f0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xa50
[ 58.945972][ T6806] #3: ffffffff8a5ac868 (rtnl_mutex){+.+.}-{3:3}, at: ip6gre_exit_batch_net+0x88/0x700
[ 58.956667][ T6806]
[ 58.956667][ T6806] stack backtrace:
[ 58.963560][ T6806] CPU: 1 PID: 6806 Comm: kworker/u4:6 Not tainted 5.7.0-rc1-next-20200417-syzkaller #0
[ 58.973198][ T6806] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 58.983264][ T6806] Workqueue: netns cleanup_net
[ 58.988023][ T6806] Call Trace:
[ 58.991321][ T6806] dump_stack+0x188/0x20d
[ 58.995664][ T6806] ipmr_device_event+0x240/0x2b0
[ 59.000609][ T6806] ? __sanitizer_cov_trace_switch+0x45/0x70
[ 59.006517][ T6806] notifier_call_chain+0xc0/0x230
[ 59.011562][ T6806] call_netdevice_notifiers_info+0xb5/0x130
[ 59.017470][ T6806] rollback_registered_many+0x75c/0xe70
[ 59.023025][ T6806] ? netif_set_real_num_tx_queues+0x700/0x700
[ 59.029107][ T6806] ? lock_downgrade+0x840/0x840
[ 59.033969][ T6806] unregister_netdevice_many.part.0+0x16/0x1e0
[ 59.040130][ T6806] unregister_netdevice_many+0x36/0x50
[ 59.045597][ T6806] ip6gre_exit_batch_net+0x4e8/0x700
[ 59.050894][ T6806] ? ip6gre_tunnel_link+0xf0/0xf0
[ 59.055926][ T6806] ? rcu_read_lock_held_common+0x130/0x130
[ 59.061744][ T6806] ? ip6gre_tunnel_link+0xf0/0xf0
[ 59.066783][ T6806] ops_exit_list.isra.0+0x103/0x150
[ 59.071997][ T6806] cleanup_net+0x511/0xa50
[ 59.076418][ T6806] ? unregister_pernet_device+0x70/0x70
[ 59.081975][ T6806] ? rcu_read_lock_any_held.part.0+0x50/0x50
[ 59.087966][ T6806] ? _raw_spin_unlock_irq+0x1f/0x80
[ 59.093181][ T6806] process_one_work+0x965/0x16a0
[ 59.098132][ T6806] ? lock_release+0x800/0x800
[ 59.102816][ T6806] ? pwq_dec_nr_in_flight+0x310/0x310
[ 59.108216][ T6806] ? rwlock_bug.part.0+0x90/0x90
[ 59.113254][ T6806] worker_thread+0x96/0xe20
[ 59.117978][ T6806] ? process_one_work+0x16a0/0x16a0
[ 59.123179][ T6806] kthread+0x388/0x470
[ 59.127248][ T6806] ? kthread_mod_delayed_work+0x1a0/0x1a0
[ 59.132981][ T6806] ret_from_fork+0x24/0x30
[ 60.124435][ T6835] can: request_module (can-proto-0) failed.
executing program
[ 62.380860][ T6835] can: request_module (can-proto-0) failed.
[ 62.392854][ T6835] can: request_module (can-proto-0) failed.