[ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.38' (ECDSA) to the list of known hosts. syzkaller login: [ 116.564953][ T8209] IPVS: ftp: loaded support on port[0] = 21 [ 116.752757][ T8209] chnl_net:caif_netlink_parms(): no params data found [ 116.860004][ T8209] bridge0: port 1(bridge_slave_0) entered blocking state [ 116.867387][ T8209] bridge0: port 1(bridge_slave_0) entered disabled state [ 116.876590][ T8209] device bridge_slave_0 entered promiscuous mode [ 116.886842][ T8209] bridge0: port 2(bridge_slave_1) entered blocking state [ 116.894445][ T8209] bridge0: port 2(bridge_slave_1) entered disabled state [ 116.903188][ T8209] device bridge_slave_1 entered promiscuous mode [ 116.933677][ T8209] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 116.946654][ T8209] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 116.977856][ T8209] team0: Port device team_slave_0 added [ 116.987220][ T8209] team0: Port device team_slave_1 added [ 117.013253][ T8209] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 117.020420][ T8209] 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. [ 117.046633][ T8209] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 117.059625][ T8209] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 117.066820][ T8209] 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. [ 117.093188][ T8209] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 117.130354][ T8209] device hsr_slave_0 entered promiscuous mode [ 117.137607][ T8209] device hsr_slave_1 entered promiscuous mode [ 117.289773][ T8209] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 117.301431][ T8209] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 117.317592][ T8209] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 117.332271][ T8209] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 117.407192][ T8209] bridge0: port 2(bridge_slave_1) entered blocking state [ 117.414505][ T8209] bridge0: port 2(bridge_slave_1) entered forwarding state [ 117.422282][ T8209] bridge0: port 1(bridge_slave_0) entered blocking state [ 117.429507][ T8209] bridge0: port 1(bridge_slave_0) entered forwarding state [ 117.499693][ T8209] 8021q: adding VLAN 0 to HW filter on device bond0 [ 117.518563][ T1979] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 117.529289][ T1979] bridge0: port 1(bridge_slave_0) entered disabled state [ 117.539257][ T1979] bridge0: port 2(bridge_slave_1) entered disabled state [ 117.550016][ T1979] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 117.566800][ T8209] 8021q: adding VLAN 0 to HW filter on device team0 [ 117.583250][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 117.592414][ T7] bridge0: port 1(bridge_slave_0) entered blocking state [ 117.599625][ T7] bridge0: port 1(bridge_slave_0) entered forwarding state [ 117.615873][ T8419] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 117.625049][ T8419] bridge0: port 2(bridge_slave_1) entered blocking state [ 117.632403][ T8419] bridge0: port 2(bridge_slave_1) entered forwarding state [ 117.660078][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 117.670184][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 117.687957][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 117.712996][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 117.722277][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 117.737720][ T8209] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 117.765973][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 117.773725][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 117.792595][ T8209] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 117.827411][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 117.837049][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 117.867656][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 117.876640][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 117.886813][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 117.895778][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 117.910149][ T8209] device veth0_vlan entered promiscuous mode [ 117.929080][ T8209] device veth1_vlan entered promiscuous mode [ 117.963867][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 117.973122][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 117.982194][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 117.991853][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 118.006354][ T8209] device veth0_macvtap entered promiscuous mode [ 118.019403][ T8209] device veth1_macvtap entered promiscuous mode [ 118.047173][ T8209] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 118.055051][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 118.064299][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 118.073985][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 118.083508][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 118.099176][ T8209] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 118.106977][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 118.116693][ T18] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 118.132142][ T8209] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 118.141358][ T8209] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 118.150172][ T8209] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 118.159101][ T8209] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 118.330046][ C1] ===================================================== [ 118.337122][ C1] BUG: KMSAN: uninit-value in ip_rcv_core+0xf4c/0x1480 [ 118.343988][ C1] CPU: 1 PID: 8421 Comm: syz-executor435 Not tainted 5.12.0-rc6-syzkaller #0 [ 118.352743][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 118.362783][ C1] Call Trace: [ 118.366075][ C1] [ 118.368908][ C1] dump_stack+0x24c/0x2e0 [ 118.373233][ C1] kmsan_report+0xfb/0x1e0 [ 118.377753][ C1] __msan_warning+0x5c/0xa0 [ 118.382247][ C1] ip_rcv_core+0xf4c/0x1480 [ 118.386748][ C1] ip_rcv+0xc7/0x820 [ 118.390634][ C1] ? kmsan_get_metadata+0x116/0x180 [ 118.395845][ C1] __netif_receive_skb+0x1ec/0x640 [ 118.400948][ C1] ? kmsan_set_origin_checked+0xa2/0x100 [ 118.406568][ C1] ? ip_local_deliver_finish+0x370/0x370 [ 118.412190][ C1] process_backlog+0x517/0xbd0 [ 118.416952][ C1] ? rps_trigger_softirq+0x4d0/0x4d0 [ 118.422226][ C1] __napi_poll+0x13e/0xca0 [ 118.426659][ C1] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 118.432715][ C1] net_rx_action+0x726/0x14a0 [ 118.437382][ C1] ? kmsan_get_shadow_origin_ptr+0x84/0xb0 [ 118.443176][ C1] ? net_tx_action+0xd30/0xd30 [ 118.447927][ C1] __do_softirq+0x1b9/0x715 [ 118.452419][ C1] ? idle_cpu+0x9a/0x1d0 [ 118.456656][ C1] ? __irq_exit_rcu+0x83/0x280 [ 118.461408][ C1] do_softirq+0x123/0x1c0 [ 118.465727][ C1] [ 118.468645][ C1] __local_bh_enable_ip+0xa1/0xb0 [ 118.473661][ C1] local_bh_enable+0x36/0x40 [ 118.478242][ C1] __dev_queue_xmit+0x3b4a/0x4600 [ 118.483271][ C1] dev_queue_xmit+0x4b/0x60 [ 118.487768][ C1] ? netdev_core_pick_tx+0x5a0/0x5a0 [ 118.493041][ C1] packet_sendmsg+0x86ee/0x99d0 [ 118.497883][ C1] ? kmsan_get_metadata+0x116/0x180 [ 118.503073][ C1] ? kmsan_internal_set_origin+0x82/0xc0 [ 118.508719][ C1] ? process_slab+0x13a8/0x1b70 [ 118.513575][ C1] ? kmsan_get_shadow_origin_ptr+0x84/0xb0 [ 118.519370][ C1] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 118.525443][ C1] ____sys_sendmsg+0xcfc/0x12f0 [ 118.530317][ C1] ? packet_getsockopt+0x1120/0x1120 [ 118.535613][ C1] __sys_sendmsg+0x714/0x830 [ 118.540200][ C1] ? __msan_instrument_asm_store+0x105/0x130 [ 118.546186][ C1] ? up_read+0x40/0x2b0 [ 118.550339][ C1] ? kmsan_get_metadata+0x116/0x180 [ 118.555548][ C1] ? kmsan_get_shadow_origin_ptr+0x84/0xb0 [ 118.561345][ C1] ? kmsan_get_metadata+0x116/0x180 [ 118.566549][ C1] __se_sys_sendmsg+0x97/0xb0 [ 118.571251][ C1] __x64_sys_sendmsg+0x4a/0x70 [ 118.576040][ C1] do_syscall_64+0x9f/0x140 [ 118.580628][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 118.586589][ C1] RIP: 0033:0x443df9 [ 118.590482][ C1] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 118.610104][ C1] RSP: 002b:00007ffc9cda4518 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 118.618513][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443df9 [ 118.626477][ C1] RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000003 [ 118.634434][ C1] RBP: 0000000000000000 R08: 0000000000f0b5ff R09: 0000000000f0b5ff [ 118.642398][ C1] R10: 00007ffc9cda3f90 R11: 0000000000000246 R12: 00007ffc9cda4550 [ 118.650369][ C1] R13: 00007ffc9cda4540 R14: 00007ffc9cda4530 R15: 0000000000000003 [ 118.658354][ C1] [ 118.660678][ C1] Uninit was stored to memory at: [ 118.665693][ C1] kmsan_internal_chain_origin+0xad/0x130 [ 118.671404][ C1] __msan_chain_origin+0x54/0xa0 [ 118.676325][ C1] iptunnel_xmit+0xbd6/0xf20 [ 118.680900][ C1] udp_tunnel_xmit_skb+0x526/0x640 [ 118.686016][ C1] geneve_xmit+0x2139/0x3c40 [ 118.690600][ C1] xmit_one+0x2b6/0x760 [ 118.694769][ C1] __dev_queue_xmit+0x3432/0x4600 [ 118.699818][ C1] dev_queue_xmit+0x4b/0x60 [ 118.704309][ C1] packet_sendmsg+0x86ee/0x99d0 [ 118.709155][ C1] ____sys_sendmsg+0xcfc/0x12f0 [ 118.714019][ C1] __sys_sendmsg+0x714/0x830 [ 118.718599][ C1] __se_sys_sendmsg+0x97/0xb0 [ 118.723262][ C1] __x64_sys_sendmsg+0x4a/0x70 [ 118.728027][ C1] do_syscall_64+0x9f/0x140 [ 118.732518][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 118.738395][ C1] [ 118.740702][ C1] Uninit was created at: [ 118.744942][ C1] kmsan_internal_poison_shadow+0x66/0xd0 [ 118.750666][ C1] kmsan_slab_alloc+0x8e/0xe0 [ 118.755350][ C1] __kmalloc_node_track_caller+0xa4f/0x1470 [ 118.761237][ C1] __alloc_skb+0x4dd/0xe90 [ 118.765655][ C1] alloc_skb_with_frags+0x1f3/0xc10 [ 118.770846][ C1] sock_alloc_send_pskb+0xdc1/0xf90 [ 118.776058][ C1] packet_sendmsg+0x6a12/0x99d0 [ 118.780898][ C1] ____sys_sendmsg+0xcfc/0x12f0 [ 118.785739][ C1] __sys_sendmsg+0x714/0x830 [ 118.790362][ C1] __se_sys_sendmsg+0x97/0xb0 [ 118.795050][ C1] __x64_sys_sendmsg+0x4a/0x70 [ 118.799820][ C1] do_syscall_64+0x9f/0x140 [ 118.804314][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 118.810199][ C1] ===================================================== [ 118.817120][ C1] Disabling lock debugging due to kernel taint [ 118.823248][ C1] Kernel panic - not syncing: panic_on_kmsan set ... [ 118.829898][ C1] CPU: 1 PID: 8421 Comm: syz-executor435 Tainted: G B 5.12.0-rc6-syzkaller #0 [ 118.840035][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 118.850118][ C1] Call Trace: [ 118.853389][ C1] [ 118.856256][ C1] dump_stack+0x24c/0x2e0 [ 118.860596][ C1] panic+0x4c6/0xea7 [ 118.864494][ C1] ? add_taint+0x17c/0x210 [ 118.868922][ C1] ? __msan_metadata_ptr_for_store_1+0x13/0x20 [ 118.875079][ C1] kmsan_report+0x1de/0x1e0 [ 118.879572][ C1] __msan_warning+0x5c/0xa0 [ 118.884060][ C1] ip_rcv_core+0xf4c/0x1480 [ 118.888555][ C1] ip_rcv+0xc7/0x820 [ 118.892437][ C1] ? kmsan_get_metadata+0x116/0x180 [ 118.897620][ C1] __netif_receive_skb+0x1ec/0x640 [ 118.902717][ C1] ? kmsan_set_origin_checked+0xa2/0x100 [ 118.908505][ C1] ? ip_local_deliver_finish+0x370/0x370 [ 118.914159][ C1] process_backlog+0x517/0xbd0 [ 118.918923][ C1] ? rps_trigger_softirq+0x4d0/0x4d0 [ 118.924222][ C1] __napi_poll+0x13e/0xca0 [ 118.928629][ C1] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 118.934695][ C1] net_rx_action+0x726/0x14a0 [ 118.939412][ C1] ? kmsan_get_shadow_origin_ptr+0x84/0xb0 [ 118.945244][ C1] ? net_tx_action+0xd30/0xd30 [ 118.950007][ C1] __do_softirq+0x1b9/0x715 [ 118.954507][ C1] ? idle_cpu+0x9a/0x1d0 [ 118.958746][ C1] ? __irq_exit_rcu+0x83/0x280 [ 118.963616][ C1] do_softirq+0x123/0x1c0 [ 118.967963][ C1] [ 118.970887][ C1] __local_bh_enable_ip+0xa1/0xb0 [ 118.975928][ C1] local_bh_enable+0x36/0x40 [ 118.980508][ C1] __dev_queue_xmit+0x3b4a/0x4600 [ 118.985527][ C1] dev_queue_xmit+0x4b/0x60 [ 118.990093][ C1] ? netdev_core_pick_tx+0x5a0/0x5a0 [ 118.995372][ C1] packet_sendmsg+0x86ee/0x99d0 [ 119.000224][ C1] ? kmsan_get_metadata+0x116/0x180 [ 119.005440][ C1] ? kmsan_internal_set_origin+0x82/0xc0 [ 119.011087][ C1] ? process_slab+0x13a8/0x1b70 [ 119.015960][ C1] ? kmsan_get_shadow_origin_ptr+0x84/0xb0 [ 119.021763][ C1] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 119.027830][ C1] ____sys_sendmsg+0xcfc/0x12f0 [ 119.032673][ C1] ? packet_getsockopt+0x1120/0x1120 [ 119.037949][ C1] __sys_sendmsg+0x714/0x830 [ 119.042541][ C1] ? __msan_instrument_asm_store+0x105/0x130 [ 119.048532][ C1] ? up_read+0x40/0x2b0 [ 119.053116][ C1] ? kmsan_get_metadata+0x116/0x180 [ 119.058311][ C1] ? kmsan_get_shadow_origin_ptr+0x84/0xb0 [ 119.064105][ C1] ? kmsan_get_metadata+0x116/0x180 [ 119.069307][ C1] __se_sys_sendmsg+0x97/0xb0 [ 119.073992][ C1] __x64_sys_sendmsg+0x4a/0x70 [ 119.078747][ C1] do_syscall_64+0x9f/0x140 [ 119.083253][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 119.089144][ C1] RIP: 0033:0x443df9 [ 119.093043][ C1] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 119.112639][ C1] RSP: 002b:00007ffc9cda4518 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 119.121043][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443df9 [ 119.129001][ C1] RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000003 [ 119.136960][ C1] RBP: 0000000000000000 R08: 0000000000f0b5ff R09: 0000000000f0b5ff [ 119.144918][ C1] R10: 00007ffc9cda3f90 R11: 0000000000000246 R12: 00007ffc9cda4550 [ 119.152880][ C1] R13: 00007ffc9cda4540 R14: 00007ffc9cda4530 R15: 0000000000000003 [ 119.161590][ C1] Kernel Offset: disabled [ 119.165912][ C1] Rebooting in 86400 seconds..