Warning: Permanently added '10.128.0.42' (ECDSA) to the list of known hosts. 2020/03/25 04:14:14 fuzzer started 2020/03/25 04:14:16 connecting to host at 10.128.0.26:42037 2020/03/25 04:14:16 checking machine... 2020/03/25 04:14:16 checking revisions... 2020/03/25 04:14:16 testing simple program... syzkaller login: [ 101.011563][T10002] IPVS: ftp: loaded support on port[0] = 21 2020/03/25 04:14:16 building call list... [ 101.208591][ T7] [ 101.211245][ T7] ============================= [ 101.221356][ T7] WARNING: suspicious RCU usage [ 101.229154][ T7] 5.6.0-rc7-next-20200324-syzkaller #0 Not tainted [ 101.242629][ T7] ----------------------------- [ 101.253738][ T7] net/openvswitch/conntrack.c:1898 RCU-list traversed in non-reader section!! [ 101.278048][ T7] [ 101.278048][ T7] other info that might help us debug this: [ 101.278048][ T7] [ 101.288742][ T7] [ 101.288742][ T7] rcu_scheduler_active = 2, debug_locks = 1 [ 101.296909][ T7] 3 locks held by kworker/u4:0/7: [ 101.302027][ T7] #0: ffff88821b78d928 ((wq_completion)netns){+.+.}, at: process_one_work+0x82a/0x1690 [ 101.311826][ T7] #1: ffffc90000cdfdd0 (net_cleanup_work){+.+.}, at: process_one_work+0x85e/0x1690 [ 101.321299][ T7] #2: ffffffff8a55f388 (pernet_ops_rwsem){++++}, at: cleanup_net+0x9b/0xa50 [ 101.330169][ T7] [ 101.330169][ T7] stack backtrace: [ 101.336078][ T7] CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.6.0-rc7-next-20200324-syzkaller #0 [ 101.345458][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 101.356057][ T7] Workqueue: netns cleanup_net [ 101.360820][ T7] Call Trace: [ 101.364140][ T7] dump_stack+0x188/0x20d [ 101.368479][ T7] ovs_ct_exit+0x3db/0x558 [ 101.372902][ T7] ovs_exit_net+0x1df/0xba0 [ 101.377413][ T7] ? ovs_dp_cmd_del+0x270/0x270 [ 101.382262][ T7] ? __mutex_unlock_slowpath+0xe2/0x660 [ 101.387814][ T7] ? ovs_dp_cmd_del+0x270/0x270 [ 101.392690][ T7] ops_exit_list.isra.0+0xa8/0x150 [ 101.397816][ T7] cleanup_net+0x511/0xa50 [ 101.402255][ T7] ? unregister_pernet_device+0x70/0x70 [ 101.407822][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 101.413821][ T7] process_one_work+0x94b/0x1690 [ 101.418792][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 101.424192][ T7] ? do_raw_spin_lock+0x129/0x2e0 [ 101.429276][ T7] worker_thread+0x96/0xe20 [ 101.433815][ T7] ? process_one_work+0x1690/0x1690 [ 101.439035][ T7] kthread+0x357/0x430 [ 101.443111][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 101.449042][ T7] ret_from_fork+0x24/0x30 [ 101.648197][ T7] tipc: TX() has been purged, node left! [ 101.690519][ T7] [ 101.692991][ T7] ============================= [ 101.697832][ T7] WARNING: suspicious RCU usage [ 101.703198][ T7] 5.6.0-rc7-next-20200324-syzkaller #0 Not tainted [ 101.711493][ T7] ----------------------------- [ 101.716388][ T7] net/ipv4/ipmr.c:1757 RCU-list traversed in non-reader section!! [ 101.724778][ T7] [ 101.724778][ T7] other info that might help us debug this: [ 101.724778][ T7] [ 101.735613][ T7] [ 101.735613][ T7] rcu_scheduler_active = 2, debug_locks = 1 [ 101.744149][ T7] 4 locks held by kworker/u4:0/7: [ 101.749544][ T7] #0: ffff88821b78d928 ((wq_completion)netns){+.+.}, at: process_one_work+0x82a/0x1690 [ 101.759772][ T7] #1: ffffc90000cdfdd0 (net_cleanup_work){+.+.}, at: process_one_work+0x85e/0x1690 [ 101.769724][ T7] #2: ffffffff8a55f388 (pernet_ops_rwsem){++++}, at: cleanup_net+0x9b/0xa50 [ 101.779447][ T7] #3: ffffffff8a56b100 (rtnl_mutex){+.+.}, at: ip6gre_exit_batch_net+0x88/0x700 [ 101.789155][ T7] [ 101.789155][ T7] stack backtrace: [ 101.795641][ T7] CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.6.0-rc7-next-20200324-syzkaller #0 [ 101.805025][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 101.815234][ T7] Workqueue: netns cleanup_net [ 101.820085][ T7] Call Trace: [ 101.823379][ T7] dump_stack+0x188/0x20d [ 101.827713][ T7] ipmr_device_event+0x240/0x2b0 [ 101.832662][ T7] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 101.838568][ T7] notifier_call_chain+0xc0/0x230 [ 101.843598][ T7] call_netdevice_notifiers_info+0xb5/0x130 [ 101.849492][ T7] rollback_registered_many+0x75c/0xe70 [ 101.855039][ T7] ? netif_set_real_num_tx_queues+0x700/0x700 [ 101.861133][ T7] ? lock_downgrade+0x7f0/0x7f0 [ 101.865988][ T7] unregister_netdevice_many.part.0+0x16/0x1e0 [ 101.872144][ T7] unregister_netdevice_many+0x36/0x50 [ 101.877609][ T7] ip6gre_exit_batch_net+0x4e8/0x700 [ 101.882985][ T7] ? ip6gre_tunnel_link+0xf0/0xf0 [ 101.888007][ T7] ? rcu_read_lock_held_common+0x130/0x130 [ 101.894003][ T7] ? ip6gre_tunnel_link+0xf0/0xf0 [ 101.899485][ T7] ops_exit_list.isra.0+0x103/0x150 [ 101.904970][ T7] cleanup_net+0x511/0xa50 [ 101.909407][ T7] ? unregister_pernet_device+0x70/0x70 [ 101.914967][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 101.920956][ T7] process_one_work+0x94b/0x1690 [ 101.925929][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 101.931318][ T7] ? do_raw_spin_lock+0x129/0x2e0 [ 101.936358][ T7] worker_thread+0x96/0xe20 [ 101.940881][ T7] ? process_one_work+0x1690/0x1690 [ 101.946077][ T7] kthread+0x357/0x430 [ 101.950251][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 101.955970][ T7] ret_from_fork+0x24/0x30 [ 102.941264][ T9986] can: request_module (can-proto-0) failed. executing program [ 104.908495][ T9986] can: request_module (can-proto-0) failed. [ 104.921838][ T9986] can: request_module (can-proto-0) failed.