Warning: Permanently added '10.128.15.194' (ECDSA) to the list of known hosts.
2020/04/24 12:02:09 fuzzer started
2020/04/24 12:02:11 connecting to host at 10.128.0.26:41469
2020/04/24 12:02:11 checking machine...
2020/04/24 12:02:11 checking revisions...
2020/04/24 12:02:11 testing simple program...
[   59.303917][ T6862] IPVS: ftp: loaded support on port[0] = 21
2020/04/24 12:02:11 building call list...
[   59.630150][  T201] tipc: TX() has been purged, node left!
[   59.672390][  T201] 
[   59.674837][  T201] =============================
[   59.679678][  T201] WARNING: suspicious RCU usage
[   59.686495][  T201] 5.7.0-rc2-next-20200423-syzkaller #0 Not tainted
[   59.694219][  T201] -----------------------------
[   59.699136][  T201] net/ipv4/ipmr.c:1757 RCU-list traversed in non-reader section!!
[   59.708866][  T201] 
[   59.708866][  T201] other info that might help us debug this:
[   59.708866][  T201] 
[   59.720429][  T201] 
[   59.720429][  T201] rcu_scheduler_active = 2, debug_locks = 1
[   59.731760][  T201] 4 locks held by kworker/u4:4/201:
[   59.737148][  T201]  #0: ffff8880a9772138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x844/0x16a0
[   59.748837][  T201]  #1: ffffc90001367dc0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x878/0x16a0
[   59.760015][  T201]  #2: ffffffff8a5a3030 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xa50
[   59.769399][  T201]  #3: ffffffff8a5aefa8 (rtnl_mutex){+.+.}-{3:3}, at: ip6gre_exit_batch_net+0x88/0x700
[   59.780689][  T201] 
[   59.780689][  T201] stack backtrace:
[   59.786681][  T201] CPU: 1 PID: 201 Comm: kworker/u4:4 Not tainted 5.7.0-rc2-next-20200423-syzkaller #0
[   59.796212][  T201] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   59.806273][  T201] Workqueue: netns cleanup_net
[   59.811025][  T201] Call Trace:
[   59.814315][  T201]  dump_stack+0x18f/0x20d
[   59.818668][  T201]  ipmr_device_event+0x240/0x2b0
[   59.823649][  T201]  ? __sanitizer_cov_trace_switch+0x45/0x70
[   59.832319][  T201]  notifier_call_chain+0xc0/0x230
[   59.837369][  T201]  call_netdevice_notifiers_info+0xb5/0x130
[   59.843259][  T201]  rollback_registered_many+0x75c/0xe70
[   59.848896][  T201]  ? netif_set_real_num_tx_queues+0x700/0x700
[   59.854965][  T201]  ? lock_downgrade+0x840/0x840
[   59.859821][  T201]  unregister_netdevice_many.part.0+0x16/0x1e0
[   59.865971][  T201]  unregister_netdevice_many+0x36/0x50
[   59.871448][  T201]  ip6gre_exit_batch_net+0x4e8/0x700
[   59.876730][  T201]  ? ip6gre_tunnel_link+0xf0/0xf0
[   59.881747][  T201]  ? rcu_read_lock_held_common+0x130/0x130
[   59.887549][  T201]  ? ip6gre_tunnel_link+0xf0/0xf0
[   59.892571][  T201]  ops_exit_list.isra.0+0x103/0x150
[   59.897782][  T201]  cleanup_net+0x511/0xa50
[   59.902202][  T201]  ? unregister_pernet_device+0x70/0x70
[   59.907783][  T201]  ? rcu_read_lock_any_held.part.0+0x50/0x50
[   59.913860][  T201]  ? _raw_spin_unlock_irq+0x1f/0x80
[   59.919063][  T201]  process_one_work+0x965/0x16a0
[   59.924004][  T201]  ? lock_release+0x800/0x800
[   59.928675][  T201]  ? pwq_dec_nr_in_flight+0x310/0x310
[   59.934044][  T201]  ? rwlock_bug.part.0+0x90/0x90
[   59.938982][  T201]  worker_thread+0x96/0xe20
[   59.943493][  T201]  ? process_one_work+0x16a0/0x16a0
[   59.948686][  T201]  kthread+0x38b/0x470
[   59.952848][  T201]  ? kthread_mod_delayed_work+0x1a0/0x1a0
[   59.958565][  T201]  ret_from_fork+0x24/0x30
[   61.000154][ T6850] can: request_module (can-proto-0) failed.
executing program
[   63.065579][ T6850] can: request_module (can-proto-0) failed.
[   63.076877][ T6850] can: request_module (can-proto-0) failed.