[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 101.919615][ T32] audit: type=1800 audit(1583996681.965:25): pid=10871 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 101.943862][ T32] audit: type=1800 audit(1583996681.995:26): pid=10871 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 101.982602][ T32] audit: type=1800 audit(1583996682.025:27): pid=10871 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 '10.128.10.8' (ECDSA) to the list of known hosts. 2020/03/12 07:04:58 parsed 1 programs 2020/03/12 07:05:06 executed programs: 0 syzkaller login: [ 126.465784][T11040] IPVS: ftp: loaded support on port[0] = 21 [ 126.581990][T11040] chnl_net:caif_netlink_parms(): no params data found [ 126.657492][T11040] bridge0: port 1(bridge_slave_0) entered blocking state [ 126.664778][T11040] bridge0: port 1(bridge_slave_0) entered disabled state [ 126.674299][T11040] device bridge_slave_0 entered promiscuous mode [ 126.683374][T11040] bridge0: port 2(bridge_slave_1) entered blocking state [ 126.690509][T11040] bridge0: port 2(bridge_slave_1) entered disabled state [ 126.699304][T11040] device bridge_slave_1 entered promiscuous mode [ 126.725332][T11040] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 126.737010][T11040] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 126.763342][T11040] team0: Port device team_slave_0 added [ 126.771404][T11040] team0: Port device team_slave_1 added [ 126.795043][T11040] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 126.802032][T11040] 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. [ 126.828225][T11040] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 126.840401][T11040] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 126.847546][T11040] 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. [ 126.873607][T11040] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 126.936174][T11040] device hsr_slave_0 entered promiscuous mode [ 127.012856][T11040] device hsr_slave_1 entered promiscuous mode [ 127.180762][T11040] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 127.246533][T11040] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 127.306988][T11040] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 127.366820][T11040] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 127.438678][T11040] bridge0: port 2(bridge_slave_1) entered blocking state [ 127.445861][T11040] bridge0: port 2(bridge_slave_1) entered forwarding state [ 127.453621][T11040] bridge0: port 1(bridge_slave_0) entered blocking state [ 127.460758][T11040] bridge0: port 1(bridge_slave_0) entered forwarding state [ 127.524196][T11040] 8021q: adding VLAN 0 to HW filter on device bond0 [ 127.539882][ T4129] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 127.551139][ T4129] bridge0: port 1(bridge_slave_0) entered disabled state [ 127.561196][ T4129] bridge0: port 2(bridge_slave_1) entered disabled state [ 127.571040][ T4129] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 127.589066][T11040] 8021q: adding VLAN 0 to HW filter on device team0 [ 127.600750][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 127.610703][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 127.619977][ T30] bridge0: port 1(bridge_slave_0) entered blocking state [ 127.627218][ T30] bridge0: port 1(bridge_slave_0) entered forwarding state [ 127.641452][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 127.651475][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 127.660744][ T12] bridge0: port 2(bridge_slave_1) entered blocking state [ 127.667904][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state [ 127.680949][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 127.702902][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 127.712850][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 127.722068][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 127.732775][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 127.742983][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 127.759595][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 127.769085][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 127.778523][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 127.795197][T11040] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 127.807519][T11040] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 127.816620][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 127.826199][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 127.852087][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 127.859964][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 127.876426][T11040] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 127.901643][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 127.911554][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 127.941837][T11040] device veth0_vlan entered promiscuous mode [ 127.949141][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 127.959150][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 127.970925][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 127.979954][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 127.998575][T11040] device veth1_vlan entered promiscuous mode [ 128.026841][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 128.035736][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 128.044704][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 128.053879][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 128.067679][T11040] device veth0_macvtap entered promiscuous mode [ 128.079984][T11040] device veth1_macvtap entered promiscuous mode [ 128.105345][T11040] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 128.113203][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 128.122495][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 128.131141][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 128.140623][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 128.157189][T11040] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 128.165464][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 128.174744][ T30] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 128.489192][T11067] ===================================================== [ 128.496180][T11067] BUG: KMSAN: uninit-value in iptable_mangle_hook+0x60b/0x700 [ 128.503625][T11067] CPU: 1 PID: 11067 Comm: syz-executor.0 Not tainted 5.6.0-rc2-syzkaller #0 [ 128.512269][T11067] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 128.522315][T11067] Call Trace: [ 128.525639][T11067] dump_stack+0x1c9/0x220 [ 128.529976][T11067] kmsan_report+0xf7/0x1e0 [ 128.534389][T11067] __msan_warning+0x58/0xa0 [ 128.538876][T11067] iptable_mangle_hook+0x60b/0x700 [ 128.543975][T11067] ? iptable_mangle_net_exit+0x130/0x130 [ 128.549602][T11067] nf_hook_slow+0x16e/0x400 [ 128.554106][T11067] __ip_local_out+0x69b/0x800 [ 128.558778][T11067] ? __ip_local_out+0x800/0x800 [ 128.563620][T11067] ip_local_out+0xa4/0x1d0 [ 128.568029][T11067] iptunnel_xmit+0x899/0xe00 [ 128.572746][T11067] udp_tunnel_xmit_skb+0x52a/0x650 [ 128.577873][T11067] geneve_xmit+0x28ed/0x2c20 [ 128.582499][T11067] ? geneve_stop+0x400/0x400 [ 128.587081][T11067] dev_hard_start_xmit+0x531/0xab0 [ 128.592183][T11067] ? kmsan_get_metadata+0x11d/0x180 [ 128.597387][T11067] __dev_queue_xmit+0x37de/0x4220 [ 128.602444][T11067] dev_queue_xmit+0x4b/0x60 [ 128.606938][T11067] ? netdev_core_pick_tx+0x4d0/0x4d0 [ 128.612203][T11067] packet_sendmsg+0x8347/0x93b0 [ 128.617063][T11067] ? kmsan_get_metadata+0x11d/0x180 [ 128.622256][T11067] ? kmsan_get_metadata+0x4f/0x180 [ 128.627367][T11067] ? kmsan_internal_set_origin+0x75/0xb0 [ 128.632981][T11067] ? kmsan_get_metadata+0x11d/0x180 [ 128.638177][T11067] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 128.643978][T11067] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 128.650048][T11067] ? aa_sk_perm+0x83c/0xcd0 [ 128.654618][T11067] ? compat_packet_setsockopt+0x360/0x360 [ 128.660334][T11067] ____sys_sendmsg+0x12b6/0x1350 [ 128.665298][T11067] __sys_sendmmsg+0x5b6/0xc90 [ 128.670010][T11067] ? kmsan_internal_check_memory+0xb1/0x3d0 [ 128.675918][T11067] ? kmsan_copy_to_user+0x81/0x90 [ 128.680935][T11067] ? kmsan_get_metadata+0x11d/0x180 [ 128.686211][T11067] ? kmsan_get_metadata+0x11d/0x180 [ 128.691405][T11067] __se_sys_sendmmsg+0xbd/0xe0 [ 128.696164][T11067] __x64_sys_sendmmsg+0x56/0x70 [ 128.701000][T11067] do_syscall_64+0xb8/0x160 [ 128.705495][T11067] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 128.711366][T11067] RIP: 0033:0x45c679 [ 128.715238][T11067] Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 128.734942][T11067] RSP: 002b:00007ffcc5188618 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 128.743366][T11067] RAX: ffffffffffffffda RBX: 0000000001d48914 RCX: 000000000045c679 [ 128.751426][T11067] RDX: 0000000000000002 RSI: 0000000020000f40 RDI: 000000000000003c [ 128.759388][T11067] RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 [ 128.767348][T11067] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 128.775322][T11067] R13: 00000000000008d2 R14: 00000000004cb58a R15: 000000000076bf0c [ 128.783284][T11067] [ 128.785592][T11067] Uninit was stored to memory at: [ 128.790600][T11067] kmsan_internal_chain_origin+0xad/0x130 [ 128.796298][T11067] __msan_chain_origin+0x50/0x90 [ 128.801216][T11067] iptunnel_xmit+0xaea/0xe00 [ 128.805787][T11067] udp_tunnel_xmit_skb+0x52a/0x650 [ 128.810876][T11067] geneve_xmit+0x28ed/0x2c20 [ 128.815463][T11067] dev_hard_start_xmit+0x531/0xab0 [ 128.820585][T11067] __dev_queue_xmit+0x37de/0x4220 [ 128.825600][T11067] dev_queue_xmit+0x4b/0x60 [ 128.830081][T11067] packet_sendmsg+0x8347/0x93b0 [ 128.834906][T11067] ____sys_sendmsg+0x12b6/0x1350 [ 128.839818][T11067] __sys_sendmmsg+0x5b6/0xc90 [ 128.844474][T11067] __se_sys_sendmmsg+0xbd/0xe0 [ 128.849214][T11067] __x64_sys_sendmmsg+0x56/0x70 [ 128.854043][T11067] do_syscall_64+0xb8/0x160 [ 128.858526][T11067] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 128.864389][T11067] [ 128.866696][T11067] Uninit was created at: [ 128.870920][T11067] kmsan_internal_poison_shadow+0x66/0xd0 [ 128.876621][T11067] kmsan_slab_alloc+0x8a/0xe0 [ 128.881271][T11067] __kmalloc_node_track_caller+0xb40/0x1200 [ 128.887142][T11067] __alloc_skb+0x2fd/0xac0 [ 128.891535][T11067] alloc_skb_with_frags+0x18c/0xa70 [ 128.896719][T11067] sock_alloc_send_pskb+0xada/0xc60 [ 128.901903][T11067] packet_sendmsg+0x66a0/0x93b0 [ 128.906743][T11067] ____sys_sendmsg+0x12b6/0x1350 [ 128.911660][T11067] __sys_sendmmsg+0x5b6/0xc90 [ 128.916321][T11067] __se_sys_sendmmsg+0xbd/0xe0 [ 128.921066][T11067] __x64_sys_sendmmsg+0x56/0x70 [ 128.925931][T11067] do_syscall_64+0xb8/0x160 [ 128.930430][T11067] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 128.936297][T11067] ===================================================== [ 128.943207][T11067] Disabling lock debugging due to kernel taint [ 128.949339][T11067] Kernel panic - not syncing: panic_on_warn set ... [ 128.955911][T11067] CPU: 1 PID: 11067 Comm: syz-executor.0 Tainted: G B 5.6.0-rc2-syzkaller #0 [ 128.966059][T11067] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 128.976096][T11067] Call Trace: [ 128.979384][T11067] dump_stack+0x1c9/0x220 [ 128.983703][T11067] panic+0x3d5/0xc3e [ 128.987612][T11067] kmsan_report+0x1df/0x1e0 [ 128.992098][T11067] __msan_warning+0x58/0xa0 [ 128.996597][T11067] iptable_mangle_hook+0x60b/0x700 [ 129.001715][T11067] ? iptable_mangle_net_exit+0x130/0x130 [ 129.007343][T11067] nf_hook_slow+0x16e/0x400 [ 129.011875][T11067] __ip_local_out+0x69b/0x800 [ 129.016537][T11067] ? __ip_local_out+0x800/0x800 [ 129.021370][T11067] ip_local_out+0xa4/0x1d0 [ 129.025773][T11067] iptunnel_xmit+0x899/0xe00 [ 129.030358][T11067] udp_tunnel_xmit_skb+0x52a/0x650 [ 129.035464][T11067] geneve_xmit+0x28ed/0x2c20 [ 129.040058][T11067] ? geneve_stop+0x400/0x400 [ 129.044629][T11067] dev_hard_start_xmit+0x531/0xab0 [ 129.049729][T11067] ? kmsan_get_metadata+0x11d/0x180 [ 129.054928][T11067] __dev_queue_xmit+0x37de/0x4220 [ 129.059993][T11067] dev_queue_xmit+0x4b/0x60 [ 129.064494][T11067] ? netdev_core_pick_tx+0x4d0/0x4d0 [ 129.069781][T11067] packet_sendmsg+0x8347/0x93b0 [ 129.074631][T11067] ? kmsan_get_metadata+0x11d/0x180 [ 129.079808][T11067] ? kmsan_get_metadata+0x4f/0x180 [ 129.084902][T11067] ? kmsan_internal_set_origin+0x75/0xb0 [ 129.090522][T11067] ? kmsan_get_metadata+0x11d/0x180 [ 129.095712][T11067] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 129.101509][T11067] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 129.107563][T11067] ? aa_sk_perm+0x83c/0xcd0 [ 129.112082][T11067] ? compat_packet_setsockopt+0x360/0x360 [ 129.117787][T11067] ____sys_sendmsg+0x12b6/0x1350 [ 129.122749][T11067] __sys_sendmmsg+0x5b6/0xc90 [ 129.127432][T11067] ? kmsan_internal_check_memory+0xb1/0x3d0 [ 129.133332][T11067] ? kmsan_copy_to_user+0x81/0x90 [ 129.138354][T11067] ? kmsan_get_metadata+0x11d/0x180 [ 129.143537][T11067] ? kmsan_get_metadata+0x11d/0x180 [ 129.148731][T11067] __se_sys_sendmmsg+0xbd/0xe0 [ 129.153479][T11067] __x64_sys_sendmmsg+0x56/0x70 [ 129.158314][T11067] do_syscall_64+0xb8/0x160 [ 129.162813][T11067] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 129.168702][T11067] RIP: 0033:0x45c679 [ 129.172592][T11067] Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 129.192231][T11067] RSP: 002b:00007ffcc5188618 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 129.200625][T11067] RAX: ffffffffffffffda RBX: 0000000001d48914 RCX: 000000000045c679 [ 129.208581][T11067] RDX: 0000000000000002 RSI: 0000000020000f40 RDI: 000000000000003c [ 129.216544][T11067] RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 [ 129.224511][T11067] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 129.232465][T11067] R13: 00000000000008d2 R14: 00000000004cb58a R15: 000000000076bf0c [ 129.241725][T11067] Kernel Offset: 0x27800000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 129.253339][T11067] Rebooting in 86400 seconds..