[ OK ] Reached target Login Prompts. [ 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 '10.128.1.70' (ECDSA) to the list of known hosts. syzkaller login: [ 31.967348] IPVS: ftp: loaded support on port[0] = 21 [ 32.036946] chnl_net:caif_netlink_parms(): no params data found [ 32.107656] bridge0: port 1(bridge_slave_0) entered blocking state [ 32.115418] bridge0: port 1(bridge_slave_0) entered disabled state [ 32.123263] device bridge_slave_0 entered promiscuous mode [ 32.131997] bridge0: port 2(bridge_slave_1) entered blocking state [ 32.138496] bridge0: port 2(bridge_slave_1) entered disabled state [ 32.147661] device bridge_slave_1 entered promiscuous mode [ 32.164545] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 32.173622] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 32.193842] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 32.201862] team0: Port device team_slave_0 added [ 32.208032] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 32.216008] team0: Port device team_slave_1 added [ 32.234200] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 32.242107] 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. [ 32.269505] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 32.282281] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 32.288650] 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. [ 32.316393] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 32.328339] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 32.336807] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 32.357473] device hsr_slave_0 entered promiscuous mode [ 32.363721] device hsr_slave_1 entered promiscuous mode [ 32.369872] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 32.376939] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 32.438997] bridge0: port 2(bridge_slave_1) entered blocking state [ 32.446264] bridge0: port 2(bridge_slave_1) entered forwarding state [ 32.453404] bridge0: port 1(bridge_slave_0) entered blocking state [ 32.460783] bridge0: port 1(bridge_slave_0) entered forwarding state [ 32.495133] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 32.502473] 8021q: adding VLAN 0 to HW filter on device bond0 [ 32.511118] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 32.519111] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 32.527994] bridge0: port 1(bridge_slave_0) entered disabled state [ 32.545795] bridge0: port 2(bridge_slave_1) entered disabled state [ 32.556396] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 32.562583] 8021q: adding VLAN 0 to HW filter on device team0 [ 32.570915] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 32.578586] bridge0: port 1(bridge_slave_0) entered blocking state [ 32.585187] bridge0: port 1(bridge_slave_0) entered forwarding state [ 32.594463] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 32.606200] bridge0: port 2(bridge_slave_1) entered blocking state [ 32.613069] bridge0: port 2(bridge_slave_1) entered forwarding state [ 32.631603] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 32.639365] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 32.648018] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 32.656175] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 32.666103] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 32.675005] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 32.681165] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 32.693387] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 32.702081] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 32.708756] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 32.719988] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 32.772257] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 32.782577] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 32.813556] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 32.821328] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 32.827993] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 32.837510] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 32.845679] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 32.852874] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 32.862349] device veth0_vlan entered promiscuous mode [ 32.871804] device veth1_vlan entered promiscuous mode [ 32.877931] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 32.887247] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 32.898731] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 32.908389] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 32.915978] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 32.923402] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 32.933790] device veth0_macvtap entered promiscuous mode [ 32.940994] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 32.948994] device veth1_macvtap entered promiscuous mode [ 32.959032] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 32.968970] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 32.981092] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 32.987936] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 32.996625] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 33.006289] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 33.013059] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 33.020705] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 33.103452] skbuff: skb_over_panic: text:ffffffff863447fc len:65575 put:65575 head:ffff8880b00bb640 data:ffff8880b00bb6e8 tail:0x100cf end:0x6c0 dev: [ 33.118016] ------------[ cut here ]------------ [ 33.122769] kernel BUG at net/core/skbuff.c:104! [ 33.129805] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 33.135200] Modules linked in: [ 33.138395] CPU: 0 PID: 7973 Comm: syz-executor757 Not tainted 4.14.265-syzkaller #0 [ 33.146270] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.155611] task: ffff8880994c0140 task.stack: ffff8880963e8000 [ 33.161665] RIP: 0010:skb_panic+0x172/0x174 [ 33.165962] RSP: 0018:ffff8880963ef500 EFLAGS: 00010282 [ 33.171467] RAX: 000000000000008f RBX: ffff8880ab3df300 RCX: 0000000000000000 [ 33.178840] RDX: 0000000000000000 RSI: ffffffff878bbcc0 RDI: ffffed1012c7de96 [ 33.186307] RBP: ffffffff88559660 R08: 000000000000008f R09: 0000000000000000 [ 33.193574] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff863447fc [ 33.201160] R13: 0000000000010027 R14: ffffffff88558ec0 R15: 00000000000006c0 [ 33.208418] FS: 0000555555e78300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 33.216750] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.222609] CR2: 00007ff8c3af3000 CR3: 00000000b3309000 CR4: 00000000003406f0 [ 33.230130] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.237385] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.244687] Call Trace: [ 33.247331] ? __ip6_append_data.isra.0+0x186c/0x2860 [ 33.252735] skb_put.cold+0x24/0x24 [ 33.256411] __ip6_append_data.isra.0+0x186c/0x2860 [ 33.261543] ? ip6_sk_dst_lookup_flow+0x7d0/0x7d0 [ 33.266388] ? ip6_mtu+0x18a/0x420 [ 33.269904] ? ip6_setup_cork+0xcb1/0x12c0 [ 33.274139] ip6_append_data+0x1b8/0x2f0 [ 33.278227] ? rawv6_recvmsg+0xb70/0xb70 [ 33.282283] ? rawv6_recvmsg+0xb70/0xb70 [ 33.286325] rawv6_sendmsg+0x10ae/0x2df0 [ 33.290371] ? compat_rawv6_setsockopt+0x100/0x100 [ 33.295284] ? lock_acquire+0x170/0x3f0 [ 33.299337] ? lock_downgrade+0x740/0x740 [ 33.303483] ? rw_copy_check_uvector+0x1dd/0x2b0 [ 33.308225] ? import_iovec+0x1df/0x360 [ 33.312190] ? copy_msghdr_from_user+0x218/0x3b0 [ 33.317082] inet_sendmsg+0x11a/0x4e0 [ 33.320868] ? security_socket_sendmsg+0x83/0xb0 [ 33.325621] ? inet_recvmsg+0x4d0/0x4d0 [ 33.329690] sock_sendmsg+0xb5/0x100 [ 33.333518] ___sys_sendmsg+0x326/0x800 [ 33.337501] ? copy_msghdr_from_user+0x3b0/0x3b0 [ 33.342259] ? ip6_datagram_dst_update+0x98d/0xf60 [ 33.347183] ? __lock_acquire+0x5fc/0x3f20 [ 33.351418] ? trace_hardirqs_on+0x10/0x10 [ 33.355632] ? ip6_datagram_dst_update+0xa5d/0xf60 [ 33.360548] ? trace_hardirqs_on+0x10/0x10 [ 33.364864] ? trace_hardirqs_on+0x10/0x10 [ 33.369080] ? __lru_cache_add+0x178/0x250 [ 33.373414] ? reacquire_held_locks+0xb5/0x3f0 [ 33.378000] ? release_sock+0x1b/0x1b0 [ 33.381870] ? __fdget+0x167/0x1f0 [ 33.385389] ? sockfd_lookup_light+0xb2/0x160 [ 33.389866] __sys_sendmmsg+0x129/0x330 [ 33.393827] ? SyS_sendmsg+0x40/0x40 [ 33.397753] ? lock_downgrade+0x740/0x740 [ 33.402017] ? inet_dgram_connect+0x11c/0x1f0 [ 33.406496] ? ipv6_setsockopt+0x63/0x120 [ 33.410625] ? rawv6_setsockopt+0x4e/0x100 [ 33.414857] ? SyS_setsockopt+0x130/0x1e0 [ 33.418982] ? SyS_recv+0x40/0x40 [ 33.422414] ? up_read+0x17/0x30 [ 33.425767] SyS_sendmmsg+0x2f/0x50 [ 33.429381] ? __sys_sendmmsg+0x330/0x330 [ 33.433510] do_syscall_64+0x1d5/0x640 [ 33.437379] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 33.442556] RIP: 0033:0x7fa2220633f9 [ 33.446335] RSP: 002b:00007ffea28bf878 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 33.454039] RAX: ffffffffffffffda RBX: 00007ffea28bf888 RCX: 00007fa2220633f9 [ 33.461415] RDX: 0000000000000001 RSI: 00000000200002c0 RDI: 0000000000000003 [ 33.468786] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 33.476085] R10: 000000000000fe80 R11: 0000000000000246 R12: 00007ffea28bf890 [ 33.483524] R13: 00007ffea28bf8b0 R14: 0000000000000000 R15: 0000000000000000 [ 33.490887] Code: 8b 4c 24 10 8b 8b 80 00 00 00 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 00 8f 55 88 ff 74 24 10 ff 74 24 20 e8 9b 69 e4 ff <0f> 0b e8 d5 16 37 fa 4c 8b 64 24 18 e8 db b0 60 fa 48 c7 c1 20 [ 33.510219] RIP: skb_panic+0x172/0x174 RSP: ffff8880963ef500 [ 33.522294] ---[ end trace 9579b53f06b83898 ]--- [ 33.527122] Kernel panic - not syncing: Fatal exception [ 33.532672] Kernel Offset: disabled [ 33.536300] Rebooting in 86400 seconds..