[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 104.903756][ T33] audit: type=1800 audit(1583925212.961:25): pid=11094 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 104.932548][ T33] audit: type=1800 audit(1583925212.981:26): pid=11094 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 104.972920][ T33] audit: type=1800 audit(1583925213.011:27): pid=11094 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.191' (ECDSA) to the list of known hosts. syzkaller login: [ 117.800298][T11245] IPVS: ftp: loaded support on port[0] = 21 [ 117.888647][T11245] chnl_net:caif_netlink_parms(): no params data found [ 117.965623][T11245] bridge0: port 1(bridge_slave_0) entered blocking state [ 117.972933][T11245] bridge0: port 1(bridge_slave_0) entered disabled state [ 117.981154][T11245] device bridge_slave_0 entered promiscuous mode [ 117.990479][T11245] bridge0: port 2(bridge_slave_1) entered blocking state [ 117.997806][T11245] bridge0: port 2(bridge_slave_1) entered disabled state [ 118.006783][T11245] device bridge_slave_1 entered promiscuous mode [ 118.035237][T11245] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 118.047143][T11245] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 118.074897][T11245] team0: Port device team_slave_0 added [ 118.084012][T11245] team0: Port device team_slave_1 added [ 118.107052][T11245] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 118.114239][T11245] 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. [ 118.144133][T11245] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 118.156242][T11245] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 118.163379][T11245] 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. [ 118.189422][T11245] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 118.255748][T11245] device hsr_slave_0 entered promiscuous mode [ 118.302562][T11245] device hsr_slave_1 entered promiscuous mode [ 118.449931][T11245] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 118.506624][T11245] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 118.566574][T11245] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 118.626518][T11245] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 118.709893][T11245] bridge0: port 2(bridge_slave_1) entered blocking state [ 118.717257][T11245] bridge0: port 2(bridge_slave_1) entered forwarding state [ 118.725142][T11245] bridge0: port 1(bridge_slave_0) entered blocking state [ 118.732602][T11245] bridge0: port 1(bridge_slave_0) entered forwarding state [ 118.794443][T11245] 8021q: adding VLAN 0 to HW filter on device bond0 [ 118.811799][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 118.822489][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 118.831746][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 118.841142][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 118.858634][T11245] 8021q: adding VLAN 0 to HW filter on device team0 [ 118.875096][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 118.884372][ T32] bridge0: port 1(bridge_slave_0) entered blocking state [ 118.891474][ T32] bridge0: port 1(bridge_slave_0) entered forwarding state [ 118.906273][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 118.915645][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 118.925496][ T12] bridge0: port 2(bridge_slave_1) entered blocking state [ 118.932936][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state [ 118.963018][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 118.973901][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 118.984690][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 118.995251][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 119.004766][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 119.014092][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 119.025307][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 119.034185][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 119.044437][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 119.061461][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 119.071019][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 119.087324][T11245] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 119.111413][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 119.119245][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 119.135177][T11245] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 119.160202][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 119.169960][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 119.197504][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 119.207878][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 119.219724][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 119.228705][ T32] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 119.240786][T11245] device veth0_vlan entered promiscuous mode [ 119.256304][T11245] device veth1_vlan entered promiscuous mode [ 119.284643][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 119.294435][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 119.304104][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 119.313499][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 119.327951][T11245] device veth0_macvtap entered promiscuous mode [ 119.340216][T11245] device veth1_macvtap entered promiscuous mode [ 119.365197][T11245] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 119.372871][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 119.383199][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 119.392325][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 119.401460][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 119.417050][T11245] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 119.425669][ T3396] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 119.436250][ T3396] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 119.651052][T11245] ===================================================== [ 119.658042][T11245] BUG: KMSAN: uninit-value in ip_tunnel_xmit+0x5f4/0x34f0 [ 119.665184][T11245] CPU: 1 PID: 11245 Comm: syz-executor247 Not tainted 5.6.0-rc2-syzkaller #0 [ 119.673925][T11245] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 119.683989][T11245] Call Trace: [ 119.687281][T11245] dump_stack+0x1c9/0x220 [ 119.691599][T11245] kmsan_report+0xf7/0x1e0 [ 119.696021][T11245] __msan_warning+0x58/0xa0 [ 119.700511][T11245] ip_tunnel_xmit+0x5f4/0x34f0 [ 119.705260][T11245] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 119.711059][T11245] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 119.717118][T11245] ? skb_push+0x15b/0x250 [ 119.721448][T11245] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 119.727334][T11245] ? __msan_metadata_ptr_for_store_2+0x13/0x20 [ 119.733491][T11245] ? kmsan_get_metadata+0x11d/0x180 [ 119.738710][T11245] ipgre_xmit+0xfe7/0x1110 [ 119.743130][T11245] ? ipgre_close+0x240/0x240 [ 119.747714][T11245] dev_hard_start_xmit+0x531/0xab0 [ 119.752847][T11245] ? kmsan_get_metadata+0x11d/0x180 [ 119.758036][T11245] __dev_queue_xmit+0x37de/0x4220 [ 119.763098][T11245] dev_queue_xmit+0x4b/0x60 [ 119.767606][T11245] ? netdev_core_pick_tx+0x4d0/0x4d0 [ 119.772896][T11245] packet_sendmsg+0x8347/0x93b0 [ 119.777755][T11245] ? __pagevec_lru_add_fn+0xcef/0xfa0 [ 119.783121][T11245] ? kmsan_get_metadata+0x4f/0x180 [ 119.788347][T11245] ? kmsan_internal_set_origin+0x75/0xb0 [ 119.793967][T11245] ? kmsan_get_metadata+0x11d/0x180 [ 119.799160][T11245] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 119.804984][T11245] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 119.811037][T11245] ? aa_sk_perm+0x83c/0xcd0 [ 119.815563][T11245] ? compat_packet_setsockopt+0x360/0x360 [ 119.821262][T11245] ____sys_sendmsg+0x12b6/0x1350 [ 119.826200][T11245] __sys_sendmsg+0x451/0x5f0 [ 119.830799][T11245] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 119.836589][T11245] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 119.842650][T11245] ? do_user_addr_fault+0xe77/0x1520 [ 119.847943][T11245] ? kmsan_get_metadata+0x11d/0x180 [ 119.853125][T11245] __se_sys_sendmsg+0x97/0xb0 [ 119.857803][T11245] __x64_sys_sendmsg+0x4a/0x70 [ 119.862589][T11245] do_syscall_64+0xb8/0x160 [ 119.867106][T11245] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 119.872981][T11245] RIP: 0033:0x443409 [ 119.876863][T11245] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 0f 83 7b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 119.896463][T11245] RSP: 002b:00007ffe6dc7b2a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 119.904863][T11245] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443409 [ 119.912816][T11245] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000004 [ 119.920774][T11245] RBP: 00007ffe6dc7b2c0 R08: 0000000001bbbbbb R09: 0000000001bbbbbb [ 119.928732][T11245] R10: 0000000001bbbbbb R11: 0000000000000246 R12: 0000000000000000 [ 119.936707][T11245] R13: 00000000004049a0 R14: 0000000000000000 R15: 0000000000000000 [ 119.944847][T11245] [ 119.947161][T11245] Uninit was created at: [ 119.951382][T11245] kmsan_internal_poison_shadow+0x66/0xd0 [ 119.957091][T11245] kmsan_slab_alloc+0x8a/0xe0 [ 119.961747][T11245] __kmalloc_node_track_caller+0xb40/0x1200 [ 119.967635][T11245] __alloc_skb+0x2fd/0xac0 [ 119.972055][T11245] alloc_skb_with_frags+0x18c/0xa70 [ 119.977250][T11245] sock_alloc_send_pskb+0xada/0xc60 [ 119.982442][T11245] packet_sendmsg+0x66a0/0x93b0 [ 119.987286][T11245] ____sys_sendmsg+0x12b6/0x1350 [ 119.992201][T11245] __sys_sendmsg+0x451/0x5f0 [ 119.996778][T11245] __se_sys_sendmsg+0x97/0xb0 [ 120.001431][T11245] __x64_sys_sendmsg+0x4a/0x70 [ 120.006185][T11245] do_syscall_64+0xb8/0x160 [ 120.010692][T11245] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 120.016580][T11245] ===================================================== [ 120.023609][T11245] Disabling lock debugging due to kernel taint [ 120.029746][T11245] Kernel panic - not syncing: panic_on_warn set ... [ 120.036494][T11245] CPU: 1 PID: 11245 Comm: syz-executor247 Tainted: G B 5.6.0-rc2-syzkaller #0 [ 120.046706][T11245] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 120.056751][T11245] Call Trace: [ 120.060027][T11245] dump_stack+0x1c9/0x220 [ 120.064356][T11245] panic+0x3d5/0xc3e [ 120.068251][T11245] kmsan_report+0x1df/0x1e0 [ 120.073695][T11245] __msan_warning+0x58/0xa0 [ 120.078184][T11245] ip_tunnel_xmit+0x5f4/0x34f0 [ 120.082945][T11245] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 120.088768][T11245] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 120.094851][T11245] ? skb_push+0x15b/0x250 [ 120.099198][T11245] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 120.104990][T11245] ? __msan_metadata_ptr_for_store_2+0x13/0x20 [ 120.111129][T11245] ? kmsan_get_metadata+0x11d/0x180 [ 120.116323][T11245] ipgre_xmit+0xfe7/0x1110 [ 120.120731][T11245] ? ipgre_close+0x240/0x240 [ 120.125314][T11245] dev_hard_start_xmit+0x531/0xab0 [ 120.130424][T11245] ? kmsan_get_metadata+0x11d/0x180 [ 120.135613][T11245] __dev_queue_xmit+0x37de/0x4220 [ 120.140636][T11245] dev_queue_xmit+0x4b/0x60 [ 120.145120][T11245] ? netdev_core_pick_tx+0x4d0/0x4d0 [ 120.150401][T11245] packet_sendmsg+0x8347/0x93b0 [ 120.155252][T11245] ? __pagevec_lru_add_fn+0xcef/0xfa0 [ 120.160659][T11245] ? kmsan_get_metadata+0x4f/0x180 [ 120.165785][T11245] ? kmsan_internal_set_origin+0x75/0xb0 [ 120.171861][T11245] ? kmsan_get_metadata+0x11d/0x180 [ 120.177055][T11245] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 120.182845][T11245] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 120.188953][T11245] ? aa_sk_perm+0x83c/0xcd0 [ 120.193462][T11245] ? compat_packet_setsockopt+0x360/0x360 [ 120.199163][T11245] ____sys_sendmsg+0x12b6/0x1350 [ 120.204097][T11245] __sys_sendmsg+0x451/0x5f0 [ 120.208686][T11245] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 120.214484][T11245] ? __msan_metadata_ptr_for_load_4+0x10/0x20 [ 120.220532][T11245] ? do_user_addr_fault+0xe77/0x1520 [ 120.225806][T11245] ? kmsan_get_metadata+0x11d/0x180 [ 120.231005][T11245] __se_sys_sendmsg+0x97/0xb0 [ 120.235668][T11245] __x64_sys_sendmsg+0x4a/0x70 [ 120.240426][T11245] do_syscall_64+0xb8/0x160 [ 120.244935][T11245] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 120.250833][T11245] RIP: 0033:0x443409 [ 120.254723][T11245] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 0f 83 7b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 120.274311][T11245] RSP: 002b:00007ffe6dc7b2a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 120.282717][T11245] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443409 [ 120.290667][T11245] RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000004 [ 120.298617][T11245] RBP: 00007ffe6dc7b2c0 R08: 0000000001bbbbbb R09: 0000000001bbbbbb [ 120.306580][T11245] R10: 0000000001bbbbbb R11: 0000000000000246 R12: 0000000000000000 [ 120.314545][T11245] R13: 00000000004049a0 R14: 0000000000000000 R15: 0000000000000000 [ 120.323902][T11245] Kernel Offset: 0x2aa00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 120.335528][T11245] Rebooting in 86400 seconds..