Warning: Permanently added '10.128.0.52' (ECDSA) to the list of known hosts. 2020/03/26 01:56:17 fuzzer started 2020/03/26 01:56:18 connecting to host at 10.128.0.26:34755 2020/03/26 01:56:18 checking machine... 2020/03/26 01:56:18 checking revisions... 2020/03/26 01:56:18 testing simple program... [ 63.966306][ T7072] IPVS: ftp: loaded support on port[0] = 21 2020/03/26 01:56:19 building call list... [ 64.216170][ T593] [ 64.218635][ T593] ============================= [ 64.223484][ T593] WARNING: suspicious RCU usage [ 64.246015][ T593] 5.6.0-rc7-next-20200325-syzkaller #0 Not tainted [ 64.252589][ T593] ----------------------------- [ 64.265488][ T593] net/openvswitch/conntrack.c:1898 RCU-list traversed in non-reader section!! [ 64.274376][ T593] [ 64.274376][ T593] other info that might help us debug this: [ 64.274376][ T593] [ 64.296799][ T593] [ 64.296799][ T593] rcu_scheduler_active = 2, debug_locks = 1 [ 64.305174][ T593] 3 locks held by kworker/u4:4/593: [ 64.312362][ T593] #0: ffff8880a977b138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x844/0x16a0 [ 64.323702][ T593] #1: ffffc90002b97dc0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x878/0x16a0 [ 64.334988][ T593] #2: ffffffff8a5715f0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xa50 [ 64.357220][ T593] [ 64.357220][ T593] stack backtrace: [ 64.363256][ T593] CPU: 1 PID: 593 Comm: kworker/u4:4 Not tainted 5.6.0-rc7-next-20200325-syzkaller #0 [ 64.372891][ T593] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.382956][ T593] Workqueue: netns cleanup_net [ 64.387727][ T593] Call Trace: [ 64.391018][ T593] dump_stack+0x188/0x20d [ 64.395448][ T593] ovs_ct_exit+0x3db/0x558 [ 64.399870][ T593] ovs_exit_net+0x1df/0xba0 [ 64.404373][ T593] ? synchronize_rcu.part.0+0xda/0xf0 [ 64.409747][ T593] ? synchronize_rcu_expedited+0x620/0x620 [ 64.415559][ T593] ? ovs_dp_cmd_del+0x270/0x270 [ 64.420436][ T593] ? ovs_dp_cmd_del+0x270/0x270 [ 64.425303][ T593] ops_exit_list.isra.0+0xa8/0x150 [ 64.430421][ T593] cleanup_net+0x511/0xa50 [ 64.434866][ T593] ? unregister_pernet_device+0x70/0x70 [ 64.440429][ T593] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.446512][ T593] ? _raw_spin_unlock_irq+0x1f/0x80 [ 64.451719][ T593] process_one_work+0x965/0x16a0 [ 64.456668][ T593] ? lock_release+0x800/0x800 [ 64.461353][ T593] ? pwq_dec_nr_in_flight+0x310/0x310 [ 64.466732][ T593] ? rwlock_bug.part.0+0x90/0x90 [ 64.471765][ T593] worker_thread+0x96/0xe20 [ 64.476385][ T593] ? process_one_work+0x16a0/0x16a0 [ 64.481692][ T593] kthread+0x388/0x470 [ 64.485781][ T593] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 64.491548][ T593] ret_from_fork+0x24/0x30 [ 64.675487][ T593] tipc: TX() has been purged, node left! [ 64.727772][ T593] [ 64.730304][ T593] ============================= [ 64.736966][ T593] WARNING: suspicious RCU usage [ 64.741924][ T593] 5.6.0-rc7-next-20200325-syzkaller #0 Not tainted [ 64.750103][ T593] ----------------------------- [ 64.755046][ T593] net/ipv4/ipmr.c:1757 RCU-list traversed in non-reader section!! [ 64.764875][ T593] [ 64.764875][ T593] other info that might help us debug this: [ 64.764875][ T593] [ 64.776843][ T593] [ 64.776843][ T593] rcu_scheduler_active = 2, debug_locks = 1 [ 64.785069][ T593] 4 locks held by kworker/u4:4/593: [ 64.792112][ T593] #0: ffff8880a977b138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x844/0x16a0 [ 64.803745][ T593] #1: ffffc90002b97dc0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x878/0x16a0 [ 64.814854][ T593] #2: ffffffff8a5715f0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xa50 [ 64.825479][ T593] #3: ffffffff8a57d4e8 (rtnl_mutex){+.+.}-{3:3}, at: ip6gre_exit_batch_net+0x88/0x700 [ 64.835209][ T593] [ 64.835209][ T593] stack backtrace: [ 64.842682][ T593] CPU: 1 PID: 593 Comm: kworker/u4:4 Not tainted 5.6.0-rc7-next-20200325-syzkaller #0 [ 64.852422][ T593] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.862489][ T593] Workqueue: netns cleanup_net [ 64.867518][ T593] Call Trace: [ 64.870816][ T593] dump_stack+0x188/0x20d [ 64.875177][ T593] ipmr_device_event+0x240/0x2b0 [ 64.880123][ T593] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 64.886020][ T593] notifier_call_chain+0xc0/0x230 [ 64.891068][ T593] call_netdevice_notifiers_info+0xb5/0x130 [ 64.896981][ T593] rollback_registered_many+0x75c/0xe70 [ 64.902553][ T593] ? netif_set_real_num_tx_queues+0x700/0x700 [ 64.908639][ T593] ? lock_downgrade+0x840/0x840 [ 64.913532][ T593] unregister_netdevice_many.part.0+0x16/0x1e0 [ 64.919708][ T593] unregister_netdevice_many+0x36/0x50 [ 64.925193][ T593] ip6gre_exit_batch_net+0x4e8/0x700 [ 64.930491][ T593] ? ip6gre_tunnel_link+0xf0/0xf0 [ 64.935520][ T593] ? rcu_read_lock_held_common+0x130/0x130 [ 64.941448][ T593] ? ip6gre_tunnel_link+0xf0/0xf0 [ 64.946497][ T593] ops_exit_list.isra.0+0x103/0x150 [ 64.951710][ T593] cleanup_net+0x511/0xa50 [ 64.956226][ T593] ? unregister_pernet_device+0x70/0x70 [ 64.961888][ T593] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.967882][ T593] ? _raw_spin_unlock_irq+0x1f/0x80 [ 64.975691][ T593] process_one_work+0x965/0x16a0 [ 64.980786][ T593] ? lock_release+0x800/0x800 [ 64.985731][ T593] ? pwq_dec_nr_in_flight+0x310/0x310 [ 64.991241][ T593] ? rwlock_bug.part.0+0x90/0x90 [ 64.996299][ T593] worker_thread+0x96/0xe20 [ 65.000829][ T593] ? process_one_work+0x16a0/0x16a0 [ 65.006153][ T593] kthread+0x388/0x470 [ 65.010566][ T593] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 65.016317][ T593] ret_from_fork+0x24/0x30 [ 65.815026][ T7050] can: request_module (can-proto-0) failed. executing program [ 68.332361][ T7050] can: request_module (can-proto-0) failed. [ 68.344066][ T7050] can: request_module (can-proto-0) failed.