[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Started OpenBSD Secure Shell server. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.6' (ECDSA) to the list of known hosts. 2021/05/04 21:10:58 fuzzer started 2021/05/04 21:10:58 connecting to host at 10.128.0.169:43633 2021/05/04 21:10:58 checking machine... 2021/05/04 21:10:58 checking revisions... 2021/05/04 21:10:58 testing simple program... syzkaller login: [ 73.368005][ T8402] chnl_net:caif_netlink_parms(): no params data found [ 73.425692][ T8402] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.434361][ T8402] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.445212][ T8402] device bridge_slave_0 entered promiscuous mode [ 73.455127][ T8402] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.465629][ T8402] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.474565][ T8402] device bridge_slave_1 entered promiscuous mode [ 73.496602][ T8402] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 73.508374][ T8402] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 73.532848][ T8402] team0: Port device team_slave_0 added [ 73.540697][ T8402] team0: Port device team_slave_1 added [ 73.558444][ T8402] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 73.565876][ T8402] 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. [ 73.592746][ T8402] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 73.605808][ T8402] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 73.613123][ T8402] 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. [ 73.640151][ T8402] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 73.667366][ T8402] device hsr_slave_0 entered promiscuous mode [ 73.675479][ T8402] device hsr_slave_1 entered promiscuous mode [ 73.779970][ T8402] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 73.794348][ T8402] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 73.804850][ T8402] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 73.818074][ T8402] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 73.846187][ T8402] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.854458][ T8402] bridge0: port 2(bridge_slave_1) entered forwarding state [ 73.864049][ T8402] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.871848][ T8402] bridge0: port 1(bridge_slave_0) entered forwarding state [ 73.917540][ T8402] 8021q: adding VLAN 0 to HW filter on device bond0 [ 73.930508][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 73.943732][ T7] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.954264][ T7] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.964256][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 73.979515][ T8402] 8021q: adding VLAN 0 to HW filter on device team0 [ 73.991616][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 74.001814][ T7] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.010205][ T7] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.032508][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 74.041432][ T2939] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.048893][ T2939] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.074613][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 74.084797][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 74.094823][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 74.108829][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 74.117486][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 74.129568][ T8402] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 74.150022][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 74.159340][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 74.175680][ T8402] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 74.195746][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 74.219239][ T8402] device veth0_vlan entered promiscuous mode [ 74.228996][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 74.239679][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 74.248771][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 74.263415][ T8402] device veth1_vlan entered promiscuous mode [ 74.285812][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 74.294766][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 74.304222][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 74.318211][ T8402] device veth0_macvtap entered promiscuous mode [ 74.328746][ T8402] device veth1_macvtap entered promiscuous mode [ 74.344708][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 74.359705][ T8402] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 74.368538][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 74.377820][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 74.390681][ T8402] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 74.400418][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 74.411929][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 74.425619][ T8402] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.434952][ T8402] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.443956][ T8402] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.455036][ T8402] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.563509][ T86] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 74.571624][ T86] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 74.587066][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 74.623924][ T86] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 74.634721][ T86] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 74.645561][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready executing program 2021/05/04 21:11:01 building call list... [ 77.117012][ T8395] can: request_module (can-proto-0) failed. [ 77.131168][ T8395] can: request_module (can-proto-0) failed. [ 77.145661][ T8395] can: request_module (can-proto-0) failed. [ 77.489814][ T86] ------------[ cut here ]------------ [ 77.511858][ T86] hook not found, pf 3 num 0 [ 77.512486][ T86] WARNING: CPU: 1 PID: 86 at net/netfilter/core.c:480 __nf_unregister_net_hook+0x1eb/0x610 [ 77.552260][ T86] Modules linked in: [ 77.556301][ T86] CPU: 1 PID: 86 Comm: kworker/u4:2 Not tainted 5.12.0-syzkaller #0 [ 77.565296][ T86] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.591807][ T86] Workqueue: netns cleanup_net [ 77.596773][ T86] RIP: 0010:__nf_unregister_net_hook+0x1