Warning: Permanently added '10.128.0.212' (ECDSA) to the list of known hosts. syzkaller login: [ 37.255850] audit: type=1400 audit(1602671751.517:8): avc: denied { execmem } for pid=6376 comm="syz-executor803" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 37.278074] IPVS: ftp: loaded support on port[0] = 21 [ 37.355093] chnl_net:caif_netlink_parms(): no params data found [ 37.406879] bridge0: port 1(bridge_slave_0) entered blocking state [ 37.414119] bridge0: port 1(bridge_slave_0) entered disabled state [ 37.422040] device bridge_slave_0 entered promiscuous mode [ 37.428875] bridge0: port 2(bridge_slave_1) entered blocking state [ 37.435780] bridge0: port 2(bridge_slave_1) entered disabled state [ 37.443059] device bridge_slave_1 entered promiscuous mode [ 37.459251] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 37.467946] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 37.485868] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 37.493159] team0: Port device team_slave_0 added [ 37.498614] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 37.506627] team0: Port device team_slave_1 added [ 37.521714] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 37.528068] 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. [ 37.553349] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 37.564672] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 37.571009] 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. [ 37.596237] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 37.607176] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 37.614774] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 37.635999] device hsr_slave_0 entered promiscuous mode [ 37.641614] device hsr_slave_1 entered promiscuous mode [ 37.647509] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 37.654676] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 37.715419] bridge0: port 2(bridge_slave_1) entered blocking state [ 37.721859] bridge0: port 2(bridge_slave_1) entered forwarding state [ 37.728576] bridge0: port 1(bridge_slave_0) entered blocking state [ 37.734995] bridge0: port 1(bridge_slave_0) entered forwarding state [ 37.764151] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 37.770827] 8021q: adding VLAN 0 to HW filter on device bond0 [ 37.778535] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 37.789040] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 37.807818] bridge0: port 1(bridge_slave_0) entered disabled state [ 37.815020] bridge0: port 2(bridge_slave_1) entered disabled state [ 37.825332] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 37.832464] 8021q: adding VLAN 0 to HW filter on device team0 [ 37.841009] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 37.848654] bridge0: port 1(bridge_slave_0) entered blocking state [ 37.855044] bridge0: port 1(bridge_slave_0) entered forwarding state [ 37.864662] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 37.872669] bridge0: port 2(bridge_slave_1) entered blocking state [ 37.878998] bridge0: port 2(bridge_slave_1) entered forwarding state [ 37.893373] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 37.901122] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 37.911372] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 37.924147] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 37.934062] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 37.945129] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 37.951943] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 37.959582] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 37.967149] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 37.980177] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 37.987448] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 37.995134] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 38.005576] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 38.056744] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 38.067411] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 38.095700] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 38.102774] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 38.109180] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 38.119195] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 38.127277] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 38.134237] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 38.143140] device veth0_vlan entered promiscuous mode [ 38.152430] device veth1_vlan entered promiscuous mode [ 38.158235] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 38.167472] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 38.179558] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 38.189534] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 38.197135] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 38.204745] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 38.214264] device veth0_macvtap entered promiscuous mode [ 38.221654] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 38.229663] device veth1_macvtap entered promiscuous mode [ 38.238664] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 38.247854] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 38.257739] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 38.264806] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 38.273494] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 38.283320] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 38.290516] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 38.340137] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 38.391148] bridge0: port 2(bridge_slave_1) entered disabled state [ 38.397837] bridge0: port 1(bridge_slave_0) entered disabled state [ 38.424150] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 38.432442] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 38.466431] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 38.473421] IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready [ 38.481852] 8021q: adding VLAN 0 to HW filter on device bond0 [ 38.488501] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 38.494676] 8021q: adding VLAN 0 to HW filter on device team0 [ 38.502756] A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check. [ 38.519274] skbuff: skb_over_panic: text:ffffffff858ce39f len:40 put:40 head:ffff88809f80aa80 data:ffff88809f80ab30 tail:0xd8 end:0xc0 dev:ip6gre0 [ 38.532864] ------------[ cut here ]------------ [ 38.537627] kernel BUG at net/core/skbuff.c:104! [ 38.542440] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 38.547794] Modules linked in: [ 38.550974] CPU: 0 PID: 2738 Comm: kworker/0:2 Not tainted 4.14.198-syzkaller #0 [ 38.558486] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.567832] Workqueue: ipv6_addrconf addrconf_dad_work [ 38.573096] task: ffff88809f5cc5c0 task.stack: ffff88809fbd8000 [ 38.579148] RIP: 0010:skb_panic+0x172/0x174 [ 38.583460] RSP: 0018:ffff88809fbdf8d0 EFLAGS: 00010282 [ 38.588809] RAX: 0000000000000086 RBX: ffff88808fdebc80 RCX: 0000000000000000 [ 38.596067] RDX: 0000000000000000 RSI: ffffffff86ac12c0 RDI: ffffed1013f7bf10 [ 38.603329] RBP: ffffffff8738d1e0 R08: 0000000000000086 R09: 0000000000000000 [ 38.610590] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff858ce39f [ 38.620273] R13: 0000000000000028 R14: ffff888096e08d00 R15: 00000000000000c0 [ 38.627540] FS: 0000000000000000(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 [ 38.635740] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.641606] CR2: 00000000200005c0 CR3: 0000000088c26000 CR4: 00000000001406f0 [ 38.648852] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.656098] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.663346] Call Trace: [ 38.665912] ? ip6_mc_hdr.constprop.0+0x11f/0x580 [ 38.670742] skb_put.cold+0x24/0x24 [ 38.674377] ip6_mc_hdr.constprop.0+0x11f/0x580 [ 38.679023] mld_newpack+0x3aa/0x720 [ 38.682713] ? ip6_mc_hdr.constprop.0+0x580/0x580 [ 38.687533] ? trace_hardirqs_on+0x10/0x10 [ 38.691757] add_grhead+0x265/0x330 [ 38.695450] add_grec+0xc40/0xed0 [ 38.698880] ? ip6_route_info_create+0x28b0/0x28b0 [ 38.703802] ? add_grhead+0x330/0x330 [ 38.707768] mld_send_initial_cr.part.0+0xb0/0x140 [ 38.712718] ipv6_mc_dad_complete+0x183/0x5a0 [ 38.717194] ? trace_hardirqs_on_caller+0x3a8/0x580 [ 38.722194] addrconf_dad_completed+0x80f/0xa40 [ 38.726849] ? addrconf_rs_timer+0x550/0x550 [ 38.731285] ? __local_bh_enable_ip+0xc1/0x170 [ 38.735862] addrconf_dad_work+0x673/0xef0 [ 38.740083] ? lock_acquire+0x170/0x3f0 [ 38.744120] ? addrconf_dad_completed+0xa40/0xa40 [ 38.748946] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 38.754429] process_one_work+0x793/0x14a0 [ 38.758731] ? work_busy+0x320/0x320 [ 38.762420] ? worker_thread+0x158/0xff0 [ 38.766474] ? _raw_spin_unlock_irq+0x24/0x80 [ 38.770953] worker_thread+0x5cc/0xff0 [ 38.774819] ? rescuer_thread+0xc80/0xc80 [ 38.778949] kthread+0x30d/0x420 [ 38.782303] ? kthread_create_on_node+0xd0/0xd0 [ 38.787640] ret_from_fork+0x24/0x30 [ 38.791327] 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 ca 38 87 ff 74 24 10 ff 74 24 20 e8 95 68 39 fc <0f> 0b e8 2d c9 4a fc 4c 8b 64 24 18 e8 a3 85 74 fc 48 c7 c1 a0 [ 38.810433] RIP: skb_panic+0x172/0x174 RSP: ffff88809fbdf8d0 [ 38.816270] ---[ end trace 6f29d4c027ea7557 ]--- [ 38.821035] Kernel panic - not syncing: Fatal exception in interrupt [ 38.828555] Kernel Offset: disabled [ 38.832178] Rebooting in 86400 seconds..