[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.3' (ECDSA) to the list of known hosts. syzkaller login: [ 74.150987][ T6502] cgroup: Unknown subsys name 'net' [ 74.169298][ T6502] cgroup: Unknown subsys name 'rlimit' [ 74.284198][ T6503] chnl_net:caif_netlink_parms(): no params data found [ 74.355607][ T6503] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.365018][ T6503] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.373581][ T6503] device bridge_slave_0 entered promiscuous mode [ 74.383702][ T6503] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.391065][ T6503] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.400405][ T6503] device bridge_slave_1 entered promiscuous mode [ 74.432285][ T6503] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 74.443297][ T6503] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 74.474876][ T6503] team0: Port device team_slave_0 added [ 74.482296][ T6503] team0: Port device team_slave_1 added [ 74.512385][ T6503] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 74.519386][ T6503] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 74.545934][ T6503] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 74.561062][ T6503] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 74.568118][ T6503] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 74.594271][ T6503] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 74.631995][ T6503] device hsr_slave_0 entered promiscuous mode [ 74.639918][ T6503] device hsr_slave_1 entered promiscuous mode [ 74.763641][ T6503] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 74.774787][ T6503] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 74.785270][ T6503] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 74.796512][ T6503] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 74.818903][ T6503] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.826042][ T6503] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.833950][ T6503] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.841115][ T6503] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.888019][ T6503] 8021q: adding VLAN 0 to HW filter on device bond0 [ 74.901655][ T34] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 74.913950][ T34] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.922856][ T34] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.931279][ T34] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 74.944499][ T6503] 8021q: adding VLAN 0 to HW filter on device team0 [ 74.957078][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 74.965989][ T7] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.973469][ T7] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.985405][ T34] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 74.994546][ T34] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.001714][ T34] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.021311][ T34] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 75.030006][ T34] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 75.043873][ T1145] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 75.060774][ T6503] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 75.072006][ T6503] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 75.084250][ T34] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 75.093555][ T34] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 75.102774][ T34] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 75.122207][ T34] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 75.129795][ T34] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 75.144292][ T6503] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 75.170192][ T6821] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 75.183458][ T1145] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 75.192628][ T1145] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 75.200848][ T1145] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 75.212314][ T6503] device veth0_vlan entered promiscuous mode [ 75.223669][ T6503] device veth1_vlan entered promiscuous mode [ 75.245616][ T1145] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 75.253633][ T1145] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 75.262676][ T1145] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 75.275169][ T6503] device veth0_macvtap entered promiscuous mode [ 75.286833][ T6503] device veth1_macvtap entered promiscuous mode [ 75.304055][ T6503] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 75.313467][ T1145] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 75.322353][ T1145] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 75.334512][ T6503] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 75.341884][ T34] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 75.352382][ T34] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 75.365295][ T6503] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.375185][ T6503] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.384172][ T6503] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.393012][ T6503] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.499236][ T1379] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 75.507231][ T1379] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 75.555936][ T6823] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 75.578268][ T50] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 75.586268][ T50] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 executing program [ 75.607868][ T34] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 78.547966][ T6821] [ 78.550527][ T6821] ============================= [ 78.555388][ T6821] WARNING: suspicious RCU usage [ 78.560350][ T6821] 5.16.0-rc3-syzkaller #0 Not tainted [ 78.565726][ T6821] ----------------------------- [ 78.570637][ T6821] include/linux/netfilter_netdev.h:97 suspicious rcu_dereference_check() usage! [ 78.579712][ T6821] [ 78.579712][ T6821] other info that might help us debug this: [ 78.579712][ T6821] [ 78.590010][ T6821] [ 78.590010][ T6821] rcu_scheduler_active = 2, debug_locks = 1 [ 78.598153][ T6821] 6 locks held by kworker/1:3/6821: [ 78.603353][ T6821] #0: ffff88807a8c4138 ((wq_completion)wg-crypt-wg0){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 [ 78.614438][ T6821] #1: ffffc9000316fdb0 ((work_completion)(&peer->transmit_packet_work)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 [ 78.627124][ T6821] #2: ffff888078158178 (&peer->endpoint_lock){++..}-{2:2}, at: wg_socket_send_skb_to_peer+0x5e/0x220 [ 78.638233][ T6821] #3: ffffffff8bb83b00 (rcu_read_lock_bh){....}-{1:2}, at: send6+0x2db/0xcc0 [ 78.647225][ T6821] #4: ffffffff8bb83b00 (rcu_read_lock_bh){....}-{1:2}, at: ip6_finish_output2+0x2ad/0x14f0 [ 78.657458][ T6821] #5: ffffffff8bb83b00 (rcu_read_lock_bh){....}-{1:2}, at: __dev_queue_xmit+0x1e3/0x3640 [ 78.667489][ T6821] [ 78.667489][ T6821] stack backtrace: [ 78.673388][ T6821] CPU: 1 PID: 6821 Comm: kworker/1:3 Not tainted 5.16.0-rc3-syzkaller #0 [ 78.681788][ T6821] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.691832][ T6821] Workqueue: wg-crypt-wg0 wg_packet_tx_worker [ 78.697896][ T6821] Call Trace: [ 78.701163][ T6821] [ 78.704097][ T6821] dump_stack_lvl+0xcd/0x134 [ 78.708692][ T6821] __dev_queue_xmit+0x2eac/0x3640 [ 78.713710][ T6821] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 78.719678][ T6821] ? lock_chain_count+0x20/0x20 [ 78.724546][ T6821] ? netdev_core_pick_tx+0x2e0/0x2e0 [ 78.729825][ T6821] ? find_held_lock+0x2d/0x110 [ 78.734582][ T6821] ? __ip6_finish_output+0x61e/0xe80 [ 78.739862][ T6821] ? mark_held_locks+0x9f/0xe0 [ 78.744611][ T6821] ? rcu_read_lock_bh_held+0x25/0x60 [ 78.749882][ T6821] ? ip6_finish_output2+0x1169/0x14f0 [ 78.755259][ T6821] ip6_finish_output2+0xf76/0x14f0 [ 78.760392][ T6821] __ip6_finish_output+0x61e/0xe80 [ 78.765505][ T6821] ? dst_output+0x170/0x170 [ 78.770009][ T6821] ip6_finish_output+0x32/0x200 [ 78.774857][ T6821] ip6_output+0x1e4/0x530 [ 78.779183][ T6821] ip6_local_out+0xaf/0x1a0 [ 78.783675][ T6821] udp_tunnel6_xmit_skb+0x72e/0xc90 [ 78.788870][ T6821] send6+0x4ab/0xcc0 [ 78.792758][ T6821] ? send4+0xe50/0xe50 [ 78.796839][ T6821] ? wg_socket_send_skb_to_peer+0xb1/0x220 [ 78.802635][ T6821] wg_socket_send_skb_to_peer+0xf5/0x220 [ 78.808267][ T6821] wg_packet_tx_worker+0x1a7/0x720 [ 78.813371][ T6821] process_one_work+0x9b2/0x1690 [ 78.818317][ T6821] ? pwq_dec_nr_in_flight+0x2a0/0x2a0 [ 78.823685][ T6821] ? rwlock_bug.part.0+0x90/0x90 [ 78.828609][ T6821] ? _raw_spin_lock_irq+0x41/0x50 [ 78.833626][ T6821] worker_thread+0x658/0x11f0 [ 78.838336][ T6821] ? process_one_work+0x1690/0x1690 [ 78.843534][ T6821] kthread+0x405/0x4f0 executing program executing program [ 78.847604][ T6821] ? set_kthread_struct+0x130/0x130 [ 78.852802][ T6821] ret_from_fork+0x1f/0x30 [ 78.857233][ T6821] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program