Warning: Permanently added '10.128.0.208' (ECDSA) to the list of known hosts. 2020/03/24 16:05:57 fuzzer started 2020/03/24 16:05:59 connecting to host at 10.128.0.26:43655 2020/03/24 16:05:59 checking machine... 2020/03/24 16:05:59 checking revisions... 2020/03/24 16:05:59 testing simple program... syzkaller login: [ 89.557486][T10081] IPVS: ftp: loaded support on port[0] = 21 2020/03/24 16:05:59 building call list... [ 89.749605][ T28] [ 89.752079][ T28] ============================= [ 89.756940][ T28] WARNING: suspicious RCU usage [ 89.769054][ T28] 5.6.0-rc7-next-20200324-syzkaller #0 Not tainted [ 89.780121][ T28] ----------------------------- [ 89.784998][ T28] net/openvswitch/conntrack.c:1898 RCU-list traversed in non-reader section!! [ 89.809089][ T28] [ 89.809089][ T28] other info that might help us debug this: [ 89.809089][ T28] [ 89.819810][ T28] [ 89.819810][ T28] rcu_scheduler_active = 2, debug_locks = 1 [ 89.827966][ T28] 3 locks held by kworker/u4:3/28: [ 89.834110][ T28] #0: ffff88821b78d928 ((wq_completion)netns){+.+.}, at: process_one_work+0x82a/0x1690 [ 89.845006][ T28] #1: ffffc90000e57dd0 (net_cleanup_work){+.+.}, at: process_one_work+0x85e/0x1690 [ 89.854929][ T28] #2: ffffffff8a55f388 (pernet_ops_rwsem){++++}, at: cleanup_net+0x9b/0xa50 [ 89.864339][ T28] [ 89.864339][ T28] stack backtrace: [ 89.870775][ T28] CPU: 0 PID: 28 Comm: kworker/u4:3 Not tainted 5.6.0-rc7-next-20200324-syzkaller #0 [ 89.880243][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 89.890305][ T28] Workqueue: netns cleanup_net [ 89.895062][ T28] Call Trace: [ 89.898352][ T28] dump_stack+0x188/0x20d [ 89.902698][ T28] ovs_ct_exit+0x3db/0x558 [ 89.907120][ T28] ovs_exit_net+0x1df/0xba0 [ 89.911631][ T28] ? ovs_dp_cmd_del+0x270/0x270 [ 89.916501][ T28] ? __mutex_unlock_slowpath+0xe2/0x660 [ 89.922066][ T28] ? ovs_dp_cmd_del+0x270/0x270 [ 89.926929][ T28] ops_exit_list.isra.0+0xa8/0x150 [ 89.932048][ T28] cleanup_net+0x511/0xa50 [ 89.936465][ T28] ? unregister_pernet_device+0x70/0x70 [ 89.942026][ T28] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 89.948001][ T28] process_one_work+0x94b/0x1690 [ 89.952954][ T28] ? pwq_dec_nr_in_flight+0x310/0x310 [ 89.958321][ T28] ? do_raw_spin_lock+0x129/0x2e0 [ 89.963361][ T28] worker_thread+0x96/0xe20 [ 89.967861][ T28] ? process_one_work+0x1690/0x1690 [ 89.973081][ T28] kthread+0x357/0x430 [ 89.977301][ T28] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 89.983135][ T28] ret_from_fork+0x24/0x30 [ 90.159160][ T28] tipc: TX() has been purged, node left! [ 90.211464][ T28] [ 90.213912][ T28] ============================= [ 90.218763][ T28] WARNING: suspicious RCU usage [ 90.224218][ T28] 5.6.0-rc7-next-20200324-syzkaller #0 Not tainted [ 90.231128][ T28] ----------------------------- [ 90.235981][ T28] net/ipv4/ipmr.c:1757 RCU-list traversed in non-reader section!! [ 90.244334][ T28] [ 90.244334][ T28] other info that might help us debug this: [ 90.244334][ T28] [ 90.255243][ T28] [ 90.255243][ T28] rcu_scheduler_active = 2, debug_locks = 1 [ 90.263671][ T28] 4 locks held by kworker/u4:3/28: [ 90.268783][ T28] #0: ffff88821b78d928 ((wq_completion)netns){+.+.}, at: process_one_work+0x82a/0x1690 [ 90.278950][ T28] #1: ffffc90000e57dd0 (net_cleanup_work){+.+.}, at: process_one_work+0x85e/0x1690 [ 90.288794][ T28] #2: ffffffff8a55f388 (pernet_ops_rwsem){++++}, at: cleanup_net+0x9b/0xa50 [ 90.297973][ T28] #3: ffffffff8a56b100 (rtnl_mutex){+.+.}, at: ip6gre_exit_batch_net+0x88/0x700 [ 90.307525][ T28] [ 90.307525][ T28] stack backtrace: [ 90.313748][ T28] CPU: 0 PID: 28 Comm: kworker/u4:3 Not tainted 5.6.0-rc7-next-20200324-syzkaller #0 [ 90.323299][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 90.333368][ T28] Workqueue: netns cleanup_net [ 90.338256][ T28] Call Trace: [ 90.341638][ T28] dump_stack+0x188/0x20d [ 90.345977][ T28] ipmr_device_event+0x240/0x2b0 [ 90.350919][ T28] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 90.356838][ T28] notifier_call_chain+0xc0/0x230 [ 90.361870][ T28] call_netdevice_notifiers_info+0xb5/0x130 [ 90.367785][ T28] rollback_registered_many+0x75c/0xe70 [ 90.373366][ T28] ? netif_set_real_num_tx_queues+0x700/0x700 [ 90.379461][ T28] ? lock_downgrade+0x7f0/0x7f0 [ 90.384323][ T28] unregister_netdevice_many.part.0+0x16/0x1e0 [ 90.390548][ T28] unregister_netdevice_many+0x36/0x50 [ 90.396027][ T28] ip6gre_exit_batch_net+0x4e8/0x700 [ 90.401339][ T28] ? ip6gre_tunnel_link+0xf0/0xf0 [ 90.406380][ T28] ? rcu_read_lock_held_common+0x130/0x130 [ 90.412215][ T28] ? ip6gre_tunnel_link+0xf0/0xf0 [ 90.417259][ T28] ops_exit_list.isra.0+0x103/0x150 [ 90.422472][ T28] cleanup_net+0x511/0xa50 [ 90.426915][ T28] ? unregister_pernet_device+0x70/0x70 [ 90.432470][ T28] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 90.438467][ T28] process_one_work+0x94b/0x1690 [ 90.443541][ T28] ? pwq_dec_nr_in_flight+0x310/0x310 [ 90.449183][ T28] ? do_raw_spin_lock+0x129/0x2e0 [ 90.454254][ T28] worker_thread+0x96/0xe20 [ 90.458791][ T28] ? process_one_work+0x1690/0x1690 [ 90.463997][ T28] kthread+0x357/0x430 [ 90.468168][ T28] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 90.473901][ T28] ret_from_fork+0x24/0x30 [ 91.502913][T10069] can: request_module (can-proto-0) failed. executing program [ 93.439096][T10069] can: request_module (can-proto-0) failed. [ 93.451945][T10069] can: request_module (can-proto-0) failed.