Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.246' (ECDSA) to the list of known hosts. syzkaller login: [ 31.277161] IPVS: ftp: loaded support on port[0] = 21 [ 31.345254] chnl_net:caif_netlink_parms(): no params data found [ 31.432983] bridge0: port 1(bridge_slave_0) entered blocking state [ 31.440181] bridge0: port 1(bridge_slave_0) entered disabled state [ 31.447320] device bridge_slave_0 entered promiscuous mode [ 31.455330] bridge0: port 2(bridge_slave_1) entered blocking state [ 31.461850] bridge0: port 2(bridge_slave_1) entered disabled state [ 31.469367] device bridge_slave_1 entered promiscuous mode [ 31.485218] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 31.494056] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 31.511903] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 31.519190] team0: Port device team_slave_0 added [ 31.524515] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 31.531951] team0: Port device team_slave_1 added [ 31.547361] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 31.553643] 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. [ 31.579181] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 31.590995] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 31.597214] 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. [ 31.622457] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 31.633022] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 31.640511] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 31.659348] device hsr_slave_0 entered promiscuous mode [ 31.664917] device hsr_slave_1 entered promiscuous mode [ 31.671472] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 31.678505] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 31.737637] bridge0: port 2(bridge_slave_1) entered blocking state [ 31.744120] bridge0: port 2(bridge_slave_1) entered forwarding state [ 31.751035] bridge0: port 1(bridge_slave_0) entered blocking state [ 31.757390] bridge0: port 1(bridge_slave_0) entered forwarding state [ 31.786309] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 31.792427] 8021q: adding VLAN 0 to HW filter on device bond0 [ 31.802235] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 31.811628] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 31.820100] bridge0: port 1(bridge_slave_0) entered disabled state [ 31.837135] bridge0: port 2(bridge_slave_1) entered disabled state [ 31.846908] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 31.853028] 8021q: adding VLAN 0 to HW filter on device team0 [ 31.861265] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 31.869185] bridge0: port 1(bridge_slave_0) entered blocking state [ 31.875521] bridge0: port 1(bridge_slave_0) entered forwarding state [ 31.894529] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 31.904795] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 31.916870] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 31.923978] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 31.931780] bridge0: port 2(bridge_slave_1) entered blocking state [ 31.938302] bridge0: port 2(bridge_slave_1) entered forwarding state [ 31.945703] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 31.953691] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 31.961365] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 31.969114] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 31.977192] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 31.984084] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 31.996310] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 32.004490] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 32.012113] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 32.021932] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 32.073991] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 32.084675] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 32.112037] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 32.119762] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 32.126169] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 32.135012] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 32.142878] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 32.149957] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 32.159563] device veth0_vlan entered promiscuous mode [ 32.167618] device veth1_vlan entered promiscuous mode [ 32.174090] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 32.182695] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 32.193689] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 32.202771] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 32.210539] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 32.218042] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 32.226788] device veth0_macvtap entered promiscuous mode [ 32.233046] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 32.241901] device veth1_macvtap entered promiscuous mode [ 32.250918] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 32.259680] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 32.269512] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 32.276259] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 32.284780] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 32.293814] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 32.300927] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 32.327838] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 32.847716] skbuff: skb_over_panic: text:ffffffff863aff4f len:40 put:40 head:ffff8880afee00c0 data:ffff8880afee1ee0 tail:0x1e48 end:0xec0 dev:ip6gretap0 [ 32.861983] ------------[ cut here ]------------ [ 32.866725] kernel BUG at net/core/skbuff.c:104! [ 32.871568] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 32.876931] Modules linked in: [ 32.880116] CPU: 0 PID: 3 Comm: kworker/0:0 Not tainted 4.14.227-syzkaller #0 [ 32.887373] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.896717] Workqueue: ipv6_addrconf addrconf_dad_work [ 32.901970] task: ffff8880b5fdc0c0 task.stack: ffff8880b5fe0000 [ 32.908027] RIP: 0010:skb_panic+0x172/0x174 [ 32.912334] RSP: 0018:ffff8880b5fe78d0 EFLAGS: 00010282 [ 32.917671] RAX: 000000000000008c RBX: ffff8880a9ffb400 RCX: 0000000000000000 [ 32.924919] RDX: 0000000000000000 RSI: ffffffff878bbbc0 RDI: ffffed1016bfcf10 [ 32.932176] RBP: ffffffff88555de0 R08: 000000000000008c R09: 0000000000000000 [ 32.939425] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff863aff4f [ 32.946672] R13: 0000000000000028 R14: ffff8880b3b444c0 R15: 0000000000000ec0 [ 32.953928] FS: 0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 32.962149] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.968023] CR2: 00000000004bd370 CR3: 0000000008e6a000 CR4: 00000000001406f0 [ 32.975291] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.982535] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.989798] Call Trace: [ 32.992375] ? ip6_mc_hdr.constprop.0+0x11f/0x580 [ 32.997217] skb_put.cold+0x24/0x24 [ 33.000823] ip6_mc_hdr.constprop.0+0x11f/0x580 [ 33.005476] mld_newpack+0x3aa/0x720 [ 33.009168] ? ip6_mc_hdr.constprop.0+0x580/0x580 [ 33.013997] ? trace_hardirqs_on+0x10/0x10 [ 33.018221] add_grhead+0x265/0x330 [ 33.021830] add_grec+0xc40/0xed0 [ 33.025271] ? ip6_route_info_create+0x28b0/0x28b0 [ 33.030207] ? add_grhead+0x330/0x330 [ 33.033987] mld_send_initial_cr.part.0+0xb0/0x140 [ 33.038901] ipv6_mc_dad_complete+0x183/0x5a0 [ 33.043385] ? trace_hardirqs_on_caller+0x3a8/0x580 [ 33.048519] addrconf_dad_completed+0x80f/0xa40 [ 33.053169] ? addrconf_rs_timer+0x5a0/0x5a0 [ 33.057573] ? __local_bh_enable_ip+0xc1/0x170 [ 33.062151] addrconf_dad_work+0x5f2/0xef0 [ 33.066398] ? lock_acquire+0x170/0x3f0 [ 33.070349] ? addrconf_dad_completed+0xa40/0xa40 [ 33.075169] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 33.080621] process_one_work+0x793/0x14a0 [ 33.084840] ? work_busy+0x320/0x320 [ 33.088534] ? worker_thread+0x158/0xff0 [ 33.092580] ? _raw_spin_unlock_irq+0x24/0x80 [ 33.097081] worker_thread+0x5cc/0xff0 [ 33.100951] ? rescuer_thread+0xc80/0xc80 [ 33.105080] kthread+0x30d/0x420 [ 33.108428] ? kthread_create_on_node+0xd0/0xd0 [ 33.113074] ret_from_fork+0x24/0x30 [ 33.116765] 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 80 56 55 88 ff 74 24 10 ff 74 24 20 e8 d9 71 e4 ff <0f> 0b e8 0e d4 39 fa 4c 8b 64 24 18 e8 64 46 63 fa 48 c7 c1 a0 [ 33.135940] RIP: skb_panic+0x172/0x174 RSP: ffff8880b5fe78d0 [ 33.141966] ---[ end trace d3c7159bbde51a54 ]--- [ 33.146727] Kernel panic - not syncing: Fatal exception in interrupt [ 33.153911] Kernel Offset: disabled [ 33.157523] Rebooting in 86400 seconds..