[ OK ] Started OpenBSD Secure Shell server. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.15.198' (ECDSA) to the list of known hosts. syzkaller login: [ 106.305548][ T32] audit: type=1400 audit(1595740826.112:8): avc: denied { execmem } for pid=8439 comm="syz-executor121" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 106.332774][ T8440] IPVS: ftp: loaded support on port[0] = 21 [ 106.491227][ T8440] chnl_net:caif_netlink_parms(): no params data found [ 106.619065][ T8440] bridge0: port 1(bridge_slave_0) entered blocking state [ 106.626598][ T8440] bridge0: port 1(bridge_slave_0) entered disabled state [ 106.635751][ T8440] device bridge_slave_0 entered promiscuous mode [ 106.645179][ T8440] bridge0: port 2(bridge_slave_1) entered blocking state [ 106.652300][ T8440] bridge0: port 2(bridge_slave_1) entered disabled state [ 106.661721][ T8440] device bridge_slave_1 entered promiscuous mode [ 106.693633][ T8440] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 106.706977][ T8440] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 106.739390][ T8440] team0: Port device team_slave_0 added [ 106.748162][ T8440] team0: Port device team_slave_1 added [ 106.777179][ T8440] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 106.784300][ T8440] 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. [ 106.810628][ T8440] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 106.822986][ T8440] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 106.830492][ T8440] 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. [ 106.856742][ T8440] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 106.929918][ T8440] device hsr_slave_0 entered promiscuous mode [ 106.975139][ T8440] device hsr_slave_1 entered promiscuous mode [ 107.185266][ T8440] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 107.229105][ T8440] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 107.289064][ T8440] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 107.349205][ T8440] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 107.431358][ T8440] bridge0: port 2(bridge_slave_1) entered blocking state [ 107.438900][ T8440] bridge0: port 2(bridge_slave_1) entered forwarding state [ 107.446860][ T8440] bridge0: port 1(bridge_slave_0) entered blocking state [ 107.454542][ T8440] bridge0: port 1(bridge_slave_0) entered forwarding state [ 107.466092][ T17] bridge0: port 1(bridge_slave_0) entered disabled state [ 107.478791][ T17] bridge0: port 2(bridge_slave_1) entered disabled state [ 107.542713][ T8440] 8021q: adding VLAN 0 to HW filter on device bond0 [ 107.561874][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 107.570739][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 107.586614][ T8440] 8021q: adding VLAN 0 to HW filter on device team0 [ 107.601843][ T3814] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 107.611165][ T3814] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 107.620831][ T3814] bridge0: port 1(bridge_slave_0) entered blocking state [ 107.628209][ T3814] bridge0: port 1(bridge_slave_0) entered forwarding state [ 107.642884][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 107.652524][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 107.662376][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 107.669898][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 107.683904][ T3814] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 107.707298][ T3814] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 107.717944][ T3814] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 107.728163][ T3814] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 107.739262][ T3814] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 107.749671][ T3814] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 107.765679][ T3814] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 107.775291][ T3814] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 107.785040][ T3814] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 107.804563][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 107.813695][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 107.829711][ T8440] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 107.855203][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 107.862836][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 107.881694][ T8440] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 107.910756][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 107.921443][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 107.951439][ T3814] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 107.960567][ T3814] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 107.976176][ T8440] device veth0_vlan entered promiscuous mode [ 107.988005][ T3814] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 107.997734][ T3814] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 108.016499][ T8440] device veth1_vlan entered promiscuous mode [ 108.048530][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 108.058119][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 108.067602][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 108.077140][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 108.093453][ T8440] device veth0_macvtap entered promiscuous mode [ 108.106385][ T8440] device veth1_macvtap entered promiscuous mode [ 108.133418][ T8440] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 108.145119][ T3814] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 108.154560][ T3814] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 108.163834][ T3814] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 108.173641][ T3814] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 108.192434][ T8440] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 108.200758][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 108.211633][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 108.460281][ T8660] device veth0_to_hsr entered promiscuous mode executing program [ 108.506522][ T8660] device batadv0 entered promiscuous mode executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 110.345467][ C1] ===================================================== [ 110.352463][ C1] BUG: KMSAN: uninit-value in batadv_bla_tx+0x2cec/0x4510 [ 110.359576][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.8.0-rc5-syzkaller #0 [ 110.367732][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 110.377793][ C1] Call Trace: [ 110.381089][ C1] dump_stack+0x1df/0x240 [ 110.387521][ C1] kmsan_report+0xf7/0x1e0 [ 110.391938][ C1] __msan_warning+0x58/0xa0 [ 110.396435][ C1] batadv_bla_tx+0x2cec/0x4510 [ 110.401198][ C1] ? ret_from_fork+0x22/0x30 [ 110.405802][ C1] ? kmsan_get_metadata+0x11d/0x180 [ 110.411014][ C1] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 110.416809][ C1] ? __msan_metadata_ptr_for_load_2+0x10/0x20 [ 110.422859][ C1] ? batadv_get_vid+0x1b4/0x340 [ 110.427958][ C1] ? kmsan_get_metadata+0x11d/0x180 [ 110.433140][ C1] batadv_interface_tx+0x67c/0x2450 [ 110.438327][ C1] ? batadv_softif_is_valid+0xb0/0xb0 [ 110.443696][ C1] dev_hard_start_xmit+0x50e/0xa70 [ 110.448799][ C1] __dev_queue_xmit+0x2f8d/0x3b20 [ 110.453813][ C1] ? kmsan_get_metadata+0x11d/0x180 [ 110.459026][ C1] ? skb_clone+0x404/0x5d0 [ 110.463444][ C1] dev_queue_xmit+0x4b/0x60 [ 110.467934][ C1] hsr_forward_skb+0x1f07/0x31f0 [ 110.472860][ C1] ? kmsan_get_metadata+0x4f/0x180 [ 110.477978][ C1] ? kmsan_internal_set_origin+0x75/0xb0 [ 110.483594][ C1] ? __msan_poison_alloca+0xf0/0x120 [ 110.488888][ C1] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 110.494955][ C1] hsr_handle_frame+0x3be/0x500 [ 110.499887][ C1] ? hsr_port_exists+0x90/0x90 [ 110.504649][ C1] __netif_receive_skb_core+0x213f/0x5890 [ 110.510374][ C1] ? kmsan_get_metadata+0x11d/0x180 [ 110.515904][ C1] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 110.521711][ C1] ? kmsan_get_metadata+0x11d/0x180 [ 110.526920][ C1] ? kmsan_get_metadata+0x11d/0x180 [ 110.532120][ C1] ? kmsan_get_metadata+0x4f/0x180 [ 110.537768][ C1] process_backlog+0x605/0x14e0 [ 110.542615][ C1] ? kmsan_get_metadata+0x4f/0x180 [ 110.547727][ C1] ? rps_trigger_softirq+0x2e0/0x2e0 [ 110.553002][ C1] net_rx_action+0x746/0x1aa0 [ 110.557698][ C1] ? net_tx_action+0xc40/0xc40 [ 110.562597][ C1] __do_softirq+0x311/0x83d [ 110.567097][ C1] ? ksoftirqd_should_run+0x30/0x30 [ 110.572308][ C1] ? takeover_tasklets+0x8f0/0x8f0 [ 110.577407][ C1] run_ksoftirqd+0x25/0x40 [ 110.581814][ C1] smpboot_thread_fn+0x493/0x980 [ 110.586786][ C1] kthread+0x515/0x550 [ 110.590861][ C1] ? cpu_report_death+0x180/0x180 [ 110.595870][ C1] ? kthread_blkcg+0xf0/0xf0 [ 110.600461][ C1] ret_from_fork+0x22/0x30 [ 110.604970][ C1] [ 110.607320][ C1] Uninit was stored to memory at: [ 110.612331][ C1] kmsan_internal_chain_origin+0xad/0x130 [ 110.618068][ C1] kmsan_memcpy_memmove_metadata+0x272/0x2e0 [ 110.624114][ C1] kmsan_memcpy_metadata+0xb/0x10 [ 110.629114][ C1] __msan_memcpy+0x43/0x50 [ 110.633604][ C1] pskb_expand_head+0x38b/0x1b00 [ 110.638668][ C1] __skb_pad+0x47f/0x900 [ 110.642932][ C1] send_hsr_supervision_frame+0x122d/0x1500 [ 110.648910][ C1] hsr_announce+0x1e2/0x370 [ 110.653397][ C1] call_timer_fn+0x218/0x510 [ 110.657964][ C1] __run_timers+0xd20/0x11c0 [ 110.662530][ C1] run_timer_softirq+0x2d/0x50 [ 110.667271][ C1] __do_softirq+0x311/0x83d [ 110.671759][ C1] [ 110.674081][ C1] Uninit was created at: [ 110.678310][ C1] kmsan_save_stack_with_flags+0x3c/0x90 [ 110.683930][ C1] kmsan_alloc_page+0xb9/0x180 [ 110.688681][ C1] __alloc_pages_nodemask+0x56a2/0x5dc0 [ 110.694560][ C1] page_frag_alloc+0x3ae/0x910 [ 110.699302][ C1] __napi_alloc_skb+0x193/0xa60 [ 110.704185][ C1] page_to_skb+0x1a2/0x1390 [ 110.708674][ C1] receive_buf+0xf9e/0x9760 [ 110.713188][ C1] virtnet_poll+0x64b/0x19f0 [ 110.717775][ C1] net_rx_action+0x746/0x1aa0 [ 110.722438][ C1] __do_softirq+0x311/0x83d [ 110.726932][ C1] ===================================================== [ 110.733936][ C1] Disabling lock debugging due to kernel taint [ 110.740063][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 110.746642][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Tainted: G B 5.8.0-rc5-syzkaller #0 [ 110.756156][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 110.766236][ C1] Call Trace: [ 110.769509][ C1] dump_stack+0x1df/0x240 [ 110.773832][ C1] panic+0x3d5/0xc3e [ 110.777747][ C1] kmsan_report+0x1df/0x1e0 [ 110.782228][ C1] __msan_warning+0x58/0xa0 [ 110.786711][ C1] batadv_bla_tx+0x2cec/0x4510 [ 110.791462][ C1] ? ret_from_fork+0x22/0x30 [ 110.796035][ C1] ? kmsan_get_metadata+0x11d/0x180 [ 110.801211][ C1] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 110.806992][ C1] ? __msan_metadata_ptr_for_load_2+0x10/0x20 [ 110.813047][ C1] ? batadv_get_vid+0x1b4/0x340 [ 110.817891][ C1] ? kmsan_get_metadata+0x11d/0x180 [ 110.823070][ C1] batadv_interface_tx+0x67c/0x2450 [ 110.828266][ C1] ? batadv_softif_is_valid+0xb0/0xb0 [ 110.833615][ C1] dev_hard_start_xmit+0x50e/0xa70 [ 110.838801][ C1] __dev_queue_xmit+0x2f8d/0x3b20 [ 110.843810][ C1] ? kmsan_get_metadata+0x11d/0x180 [ 110.848997][ C1] ? skb_clone+0x404/0x5d0 [ 110.853405][ C1] dev_queue_xmit+0x4b/0x60 [ 110.857897][ C1] hsr_forward_skb+0x1f07/0x31f0 [ 110.862816][ C1] ? kmsan_get_metadata+0x4f/0x180 [ 110.867919][ C1] ? kmsan_internal_set_origin+0x75/0xb0 [ 110.873530][ C1] ? __msan_poison_alloca+0xf0/0x120 [ 110.878805][ C1] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 110.884873][ C1] hsr_handle_frame+0x3be/0x500 [ 110.889704][ C1] ? hsr_port_exists+0x90/0x90 [ 110.894449][ C1] __netif_receive_skb_core+0x213f/0x5890 [ 110.900495][ C1] ? kmsan_get_metadata+0x11d/0x180 [ 110.905670][ C1] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 110.911472][ C1] ? kmsan_get_metadata+0x11d/0x180 [ 110.916650][ C1] ? kmsan_get_metadata+0x11d/0x180 [ 110.921832][ C1] ? kmsan_get_metadata+0x4f/0x180 [ 110.926924][ C1] process_backlog+0x605/0x14e0 [ 110.931773][ C1] ? kmsan_get_metadata+0x4f/0x180 [ 110.936876][ C1] ? rps_trigger_softirq+0x2e0/0x2e0 [ 110.942150][ C1] net_rx_action+0x746/0x1aa0 [ 110.946850][ C1] ? net_tx_action+0xc40/0xc40 [ 110.951604][ C1] __do_softirq+0x311/0x83d [ 110.956101][ C1] ? ksoftirqd_should_run+0x30/0x30 [ 110.961290][ C1] ? takeover_tasklets+0x8f0/0x8f0 [ 110.966385][ C1] run_ksoftirqd+0x25/0x40 [ 110.970979][ C1] smpboot_thread_fn+0x493/0x980 [ 110.975919][ C1] kthread+0x515/0x550 [ 110.979965][ C1] ? cpu_report_death+0x180/0x180 [ 110.984968][ C1] ? kthread_blkcg+0xf0/0xf0 [ 110.989536][ C1] ret_from_fork+0x22/0x30 [ 110.995533][ C1] Kernel Offset: 0x27a00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 111.007148][ C1] Rebooting in 86400 seconds..