[ 1503.730295][T31638] ip6_gre: GRE over IPv6 tunneling driver
[ 1508.304500][T31694] ip6_tunnel: tep1 xmit: Local address not yet configured!
[ 1514.144439][ C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1516.129432][ C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1517.984438][ C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1519.658549][ C2]
[ 1519.658815][ C2] =============================
[ 1519.659020][ C2] WARNING: suspicious RCU usage
[ 1519.659214][ C2] 7.2.0-rc2-virtme #1 Not tainted
[ 1519.659631][ C2] -----------------------------
[ 1519.659834][ C2] drivers/net/vxlan/vxlan_core.c:872 suspicious rcu_dereference_protected() usage!
[ 1519.660157][ C2]
[ 1519.660157][ C2] other info that might help us debug this:
[ 1519.660157][ C2]
[ 1519.660512][ C2]
[ 1519.660512][ C2] rcu_scheduler_active = 2, debug_locks = 1
[ 1519.660780][ C2] 8 locks held by kworker/2:2/63:
[ 1519.660978][ C2] #0: ff110000090d0340 ((wq_completion)mld){+.+.}-{0:0}, at: process_one_work+0xd55/0x1410
[ 1519.661330][ C2] #1: ffa0000000447d10 ((work_completion)(&(&idev->mc_ifc_work)->work)){+.+.}-{0:0}, at: process_one_work+0xdb7/0x1410
[ 1519.661728][ C2] #2: ff1100000c4e5530 (&idev->mc_lock){+.+.}-{4:4}, at: mld_ifc_work+0x2e/0x190
[ 1519.662195][ C2] #3: ffffffffbad91dc0 (rcu_read_lock){....}-{1:3}, at: mld_sendpack+0x1c9/0xec0
[ 1519.662530][ C2] #4: ffffffffbad91dc0 (rcu_read_lock){....}-{1:3}, at: ip6_output+0x11d/0x7f0
[ 1519.662840][ C2] #5: ffffffffbad91dc0 (rcu_read_lock){....}-{1:3}, at: process_backlog+0x561/0x1490
[ 1519.663151][ C2] #6: ffffffffbad91dc0 (rcu_read_lock){....}-{1:3}, at: ip_local_deliver_finish+0x2ba/0x610
[ 1519.663515][ C2] #7: ff110000128f2fa8 (&vxlan->hash_lock){+.-.}-{3:3}, at: vxlan_snoop+0x5dc/0x9a0 [vxlan]
[ 1519.663865][ C2]
[ 1519.663865][ C2] stack backtrace:
[ 1519.664103][ C2] CPU: 2 UID: 0 PID: 63 Comm: kworker/2:2 Not tainted 7.2.0-rc2-virtme #1 PREEMPT(full)
[ 1519.664107][ C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1519.664109][ C2] Workqueue: mld mld_ifc_work
[ 1519.664114][ C2] Call Trace:
[ 1519.664116][ C2]
[ 1519.664119][ C2] dump_stack_lvl+0x6f/0xa0
[ 1519.664124][ C2] lockdep_rcu_suspicious.cold+0x37/0x89
[ 1519.664130][ C2] vxlan_fdb_create+0xe1b/0x1a70 [vxlan]
[ 1519.664136][ C2] ? vxlan_find_mac_rcu+0x578/0x6b0 [vxlan]
[ 1519.664142][ C2] ? lock_acquire.part.0+0xbc/0x260
[ 1519.664146][ C2] ? find_held_lock+0x2b/0x80
[ 1519.664149][ C2] ? vxlan_open+0x340/0x340 [vxlan]
[ 1519.664153][ C2] ? __lock_release.isra.0+0x6b/0x1a0
[ 1519.664158][ C2] vxlan_fdb_update+0x208/0x3e0 [vxlan]
[ 1519.664164][ C2] ? vxlan_fdb_create+0x1a70/0x1a70 [vxlan]
[ 1519.664168][ C2] ? lock_acquire.part.0+0xbc/0x260
[ 1519.664170][ C2] ? do_raw_spin_lock+0x131/0x280
[ 1519.664174][ C2] vxlan_snoop+0x6ba/0x9a0 [vxlan]
[ 1519.664180][ C2] ? __iptunnel_pull_header+0x33b/0x730
[ 1519.664184][ C2] vxlan_rcv+0x172e/0x2c20 [vxlan]
[ 1519.664188][ C2] ? fib_table_lookup+0xe88/0x18f0
[ 1519.664194][ C2] ? encap_bypass_if_local+0x290/0x290 [vxlan]
[ 1519.664199][ C2] ? udp_lib_lport_inuse2+0x3d0/0x3d0
[ 1519.664205][ C2] ? __udp4_lib_lookup+0x5f1/0x820
[ 1519.664208][ C2] ? encap_bypass_if_local+0x290/0x290 [vxlan]
[ 1519.664211][ C2] ? udp_queue_rcv_one_skb+0x645/0xb00
[ 1519.664213][ C2] udp_queue_rcv_one_skb+0x645/0xb00
[ 1519.664215][ C2] ? lock_acquire.part.0+0xbc/0x260
[ 1519.664217][ C2] ? down_read_killable_nested+0x3c2/0x600
[ 1519.664220][ C2] udp_unicast_rcv_skb+0x366/0x450
[ 1519.664222][ C2] ? udp_rcv+0xce3/0x1e30
[ 1519.664224][ C2] udp_rcv+0xd01/0x1e30
[ 1519.664229][ C2] ? udp_sk_rx_dst_set+0x90/0x90
[ 1519.664233][ C2] ? lock_acquire.part.0+0xbc/0x260
[ 1519.664235][ C2] ? ip_local_deliver_finish+0x2ba/0x610
[ 1519.664238][ C2] ip_protocol_deliver_rcu+0x82/0x350
[ 1519.664242][ C2] ? process_backlog+0x561/0x1490
[ 1519.664244][ C2] ip_local_deliver_finish+0x36f/0x610
[ 1519.664246][ C2] ? __lock_release.isra.0+0x6b/0x1a0
[ 1519.664248][ C2] ip_local_deliver+0x184/0x4c0
[ 1519.664250][ C2] ? ip_local_deliver_finish+0x610/0x610
[ 1519.664253][ C2] ? ip_rcv_finish_core+0x6ed/0x14c0
[ 1519.664258][ C2] ? process_backlog+0x561/0x1490
[ 1519.664259][ C2] ip_rcv+0xdc/0x3d0
[ 1519.664262][ C2] ? ip_local_deliver+0x4c0/0x4c0
[ 1519.664263][ C2] ? validate_chain+0x38b/0xc20
[ 1519.664267][ C2] ? mark_usage+0x61/0x170
[ 1519.664269][ C2] ? __lock_acquire+0x518/0xc20
[ 1519.664273][ C2] __netif_receive_skb_one_core+0xfc/0x180
[ 1519.664275][ C2] ? lock_acquire.part.0+0xbc/0x260
[ 1519.664278][ C2] ? __netif_receive_skb_list_core+0x9e0/0x9e0
[ 1519.664280][ C2] ? rcu_is_watching+0x15/0xd0
[ 1519.664285][ C2] process_backlog+0x2bc/0x1490
[ 1519.664290][ C2] __napi_poll+0xa7/0x3b0
[ 1519.664293][ C2] net_rx_action+0x513/0xf50
[ 1519.664297][ C2] ? __napi_poll+0x3b0/0x3b0
[ 1519.664302][ C2] ? __lock_release.isra.0+0x6b/0x1a0
[ 1519.664307][ C2] ? note_gp_changes+0x158/0x1f0
[ 1519.664310][ C2] ? rcu_is_watching+0x15/0xd0
[ 1519.664312][ C2] ? mark_held_locks+0x40/0x70
[ 1519.664315][ C2] handle_softirqs+0x1d8/0x8f0
[ 1519.664320][ C2] ? _local_bh_enable+0xd0/0xd0
[ 1519.664323][ C2] ? __dev_queue_xmit+0x974/0x1b90
[ 1519.664326][ C2] do_softirq+0xa9/0xe0
[ 1519.664328][ C2]
[ 1519.664329][ C2]
[ 1519.664330][ C2] __local_bh_enable_ip+0x113/0x140
[ 1519.664332][ C2] __dev_queue_xmit+0x989/0x1b90
[ 1519.664335][ C2] ? __lock_acquire+0x518/0xc20
[ 1519.664339][ C2] ? find_held_lock+0x2b/0x80
[ 1519.664341][ C2] ? netdev_core_pick_tx+0x2c0/0x2c0
[ 1519.664344][ C2] ? __asan_memcpy+0x3c/0x60
[ 1519.664347][ C2] ? eth_header+0x14c/0x180
[ 1519.664351][ C2] ? neigh_resolve_output.part.0+0x344/0x740
[ 1519.664357][ C2] ip6_finish_output2+0x488/0x1310
[ 1519.664362][ C2] ? ip6_xmit+0x2000/0x2000
[ 1519.664367][ C2] ? find_held_lock+0x2b/0x80
[ 1519.664370][ C2] ? __lock_release.isra.0+0x6b/0x1a0
[ 1519.664373][ C2] ? ip6_mtu+0x174/0x410
[ 1519.664377][ C2] ip6_finish_output+0x701/0xe80
[ 1519.664380][ C2] ip6_output+0x23f/0x7f0
[ 1519.664383][ C2] ? ip6_finish_output+0xe80/0xe80
[ 1519.664384][ C2] ? __lock_release.isra.0+0x6b/0x1a0
[ 1519.664387][ C2] ? xfrm_bundle_lookup.constprop.0+0xba0/0xba0
[ 1519.664390][ C2] ? mark_held_locks+0x40/0x70
[ 1519.664393][ C2] ? __local_bh_enable_ip+0xa5/0x140
[ 1519.664395][ C2] ? __local_bh_enable_ip+0xa5/0x140
[ 1519.664397][ C2] ? icmp6_dst_alloc+0x317/0x4d0
[ 1519.664400][ C2] mld_sendpack+0x9d6/0xec0
[ 1519.664404][ C2] ? mld_dad_start_work+0x240/0x240
[ 1519.664410][ C2] ? mld_send_cr+0x50f/0x820
[ 1519.664413][ C2] mld_ifc_work+0x36/0x190
[ 1519.664416][ C2] ? process_one_work+0xdb7/0x1410
[ 1519.664417][ C2] process_one_work+0xdf8/0x1410
[ 1519.664422][ C2] ? pwq_dec_nr_in_flight+0x710/0x710
[ 1519.664424][ C2] ? lock_acquire.part.0+0xbc/0x260
[ 1519.664431][ C2] worker_thread+0x4f1/0xd60
[ 1519.664434][ C2] ? rescuer_thread+0x1320/0x1320
[ 1519.664436][ C2] ? __kthread_parkme+0xbd/0x210
[ 1519.664439][ C2] ? rescuer_thread+0x1320/0x1320
[ 1519.664441][ C2] ? rescuer_thread+0x1320/0x1320
[ 1519.664443][ C2] kthread+0x367/0x460
[ 1519.664444][ C2] ? trace_irq_enable.constprop.0+0x9b/0x160
[ 1519.664448][ C2] ? kthread_affine_node+0x330/0x330
[ 1519.664450][ C2] ret_from_fork+0x474/0x6b0
[ 1519.664454][ C2] ? arch_exit_to_user_mode_prepare.isra.0+0x120/0x120
[ 1519.664457][ C2] ? __switch_to+0x5a3/0xe00
[ 1519.664460][ C2] ? kthread_affine_node+0x330/0x330
[ 1519.664462][ C2] ret_from_fork_asm+0x11/0x20
[ 1519.664469][ C2]
[ 1519.969430][ C3] ip6_tunnel: tep0 xmit: Local address not yet configured!