Warning: Permanently added '10.128.0.244' (ECDSA) to the list of known hosts. 2020/03/24 03:59:10 fuzzer started 2020/03/24 03:59:12 connecting to host at 10.128.0.26:38833 2020/03/24 03:59:12 checking machine... 2020/03/24 03:59:12 checking revisions... 2020/03/24 03:59:12 testing simple program... 2020/03/24 03:59:12 building call list... syzkaller login: [ 87.061162][ T9568] IPVS: ftp: loaded support on port[0] = 21 [ 87.266040][ T21] [ 87.268514][ T21] ============================= [ 87.273356][ T21] WARNING: suspicious RCU usage [ 87.285862][ T21] 5.6.0-rc7-next-20200323-syzkaller #0 Not tainted [ 87.292501][ T21] ----------------------------- [ 87.297917][ T21] net/openvswitch/conntrack.c:1898 RCU-list traversed in non-reader section!! [ 87.307726][ T21] [ 87.307726][ T21] other info that might help us debug this: [ 87.307726][ T21] [ 87.319683][ T21] [ 87.319683][ T21] rcu_scheduler_active = 2, debug_locks = 1 [ 87.336547][ T21] 3 locks held by kworker/u4:1/21: [ 87.343061][ T21] #0: ffff88821b78d928 ((wq_completion)netns){+.+.}, at: process_one_work+0x82a/0x1690 [ 87.353361][ T21] #1: ffffc90000dd7dd0 (net_cleanup_work){+.+.}, at: process_one_work+0x85e/0x1690 [ 87.363317][ T21] #2: ffffffff8a55ec88 (pernet_ops_rwsem){++++}, at: cleanup_net+0x9b/0xa50 [ 87.372598][ T21] [ 87.372598][ T21] stack backtrace: [ 87.378921][ T21] CPU: 1 PID: 21 Comm: kworker/u4:1 Not tainted 5.6.0-rc7-next-20200323-syzkaller #0 [ 87.388381][ T21] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 87.398439][ T21] Workqueue: netns cleanup_net [ 87.403192][ T21] Call Trace: [ 87.406481][ T21] dump_stack+0x188/0x20d [ 87.410810][ T21] ovs_ct_exit+0x3db/0x558 [ 87.415227][ T21] ovs_exit_net+0x1df/0xba0 [ 87.421207][ T21] ? ovs_dp_cmd_del+0x270/0x270 [ 87.426068][ T21] ? __mutex_unlock_slowpath+0xe2/0x660 [ 87.431622][ T21] ? ovs_dp_cmd_del+0x270/0x270 [ 87.436475][ T21] ops_exit_list.isra.0+0xa8/0x150 [ 87.441590][ T21] cleanup_net+0x511/0xa50 [ 87.446018][ T21] ? unregister_pernet_device+0x70/0x70 [ 87.451572][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 87.457558][ T21] process_one_work+0x94b/0x1690 [ 87.462511][ T21] ? pwq_dec_nr_in_flight+0x310/0x310 [ 87.467894][ T21] ? do_raw_spin_lock+0x129/0x2e0 [ 87.472945][ T21] worker_thread+0x96/0xe20 [ 87.477468][ T21] ? process_one_work+0x1690/0x1690 [ 87.482666][ T21] kthread+0x357/0x430 [ 87.486741][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 87.492466][ T21] ret_from_fork+0x24/0x30 [ 87.645675][ T21] tipc: TX() has been purged, node left! [ 87.688621][ T21] [ 87.691084][ T21] ============================= [ 87.696514][ T21] WARNING: suspicious RCU usage [ 87.702257][ T21] 5.6.0-rc7-next-20200323-syzkaller #0 Not tainted [ 87.709863][ T21] ----------------------------- [ 87.714798][ T21] net/ipv4/ipmr.c:1757 RCU-list traversed in non-reader section!! [ 87.723356][ T21] [ 87.723356][ T21] other info that might help us debug this: [ 87.723356][ T21] [ 87.734294][ T21] [ 87.734294][ T21] rcu_scheduler_active = 2, debug_locks = 1 [ 87.734323][ T21] 4 locks held by kworker/u4:1/21: [ 87.734327][ T21] #0: ffff88821b78d928 ((wq_completion)netns){+.+.}, at: process_one_work+0x82a/0x1690 [ 87.734409][ T21] #1: ffffc90000dd7dd0 (net_cleanup_work){+.+.}, at: process_one_work+0x85e/0x1690 [ 87.734441][ T21] #2: ffffffff8a55ec88 (pernet_ops_rwsem){++++}, at: cleanup_net+0x9b/0xa50 [ 87.776422][ T21] #3: ffffffff8a56aa00 (rtnl_mutex){+.+.}, at: ip6gre_exit_batch_net+0x88/0x700 [ 87.785690][ T21] [ 87.785690][ T21] stack backtrace: [ 87.791895][ T21] CPU: 1 PID: 21 Comm: kworker/u4:1 Not tainted 5.6.0-rc7-next-20200323-syzkaller #0 [ 87.801490][ T21] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 87.811560][ T21] Workqueue: netns cleanup_net [ 87.816406][ T21] Call Trace: [ 87.819701][ T21] dump_stack+0x188/0x20d [ 87.824033][ T21] ipmr_device_event+0x240/0x2b0 [ 87.828971][ T21] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 87.834864][ T21] notifier_call_chain+0xc0/0x230 [ 87.839895][ T21] call_netdevice_notifiers_info+0xb5/0x130 [ 87.845795][ T21] rollback_registered_many+0x75c/0xe70 [ 87.851342][ T21] ? netif_set_real_num_tx_queues+0x700/0x700 [ 87.857410][ T21] ? lock_downgrade+0x7f0/0x7f0 [ 87.862694][ T21] unregister_netdevice_many.part.0+0x16/0x1e0 [ 87.868859][ T21] unregister_netdevice_many+0x36/0x50 [ 87.874322][ T21] ip6gre_exit_batch_net+0x4e8/0x700 [ 87.879634][ T21] ? ip6gre_tunnel_link+0xf0/0xf0 [ 87.884661][ T21] ? rcu_read_lock_held_common+0x130/0x130 [ 87.890470][ T21] ? ip6gre_tunnel_link+0xf0/0xf0 [ 87.895493][ T21] ops_exit_list.isra.0+0x103/0x150 [ 87.900788][ T21] cleanup_net+0x511/0xa50 [ 87.905227][ T21] ? unregister_pernet_device+0x70/0x70 [ 87.910915][ T21] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 87.916917][ T21] process_one_work+0x94b/0x1690 [ 87.921867][ T21] ? pwq_dec_nr_in_flight+0x310/0x310 [ 87.927236][ T21] ? do_raw_spin_lock+0x129/0x2e0 [ 87.932281][ T21] worker_thread+0x96/0xe20 [ 87.936797][ T21] ? process_one_work+0x1690/0x1690 [ 87.941993][ T21] kthread+0x357/0x430 [ 87.946058][ T21] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 87.951780][ T21] ret_from_fork+0x24/0x30 [ 88.657457][ T9551] can: request_module (can-proto-0) failed. executing program [ 91.054501][ T9551] can: request_module (can-proto-0) failed. [ 91.066795][ T9551] can: request_module (can-proto-0) failed.