Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.169' (ECDSA) to the list of known hosts. syzkaller login: [ 27.500787] IPVS: ftp: loaded support on port[0] = 21 [ 27.565035] chnl_net:caif_netlink_parms(): no params data found [ 27.651540] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.658452] bridge0: port 1(bridge_slave_0) entered disabled state [ 27.665422] device bridge_slave_0 entered promiscuous mode [ 27.672735] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.679321] bridge0: port 2(bridge_slave_1) entered disabled state [ 27.686430] device bridge_slave_1 entered promiscuous mode [ 27.702060] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 27.710670] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 27.727761] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 27.734847] team0: Port device team_slave_0 added [ 27.740399] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 27.747647] team0: Port device team_slave_1 added [ 27.761788] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 27.768063] 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. [ 27.793276] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 27.804635] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 27.810926] 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. [ 27.836192] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 27.847036] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 27.854292] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 27.872595] device hsr_slave_0 entered promiscuous mode [ 27.878213] device hsr_slave_1 entered promiscuous mode [ 27.884032] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 27.891112] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 27.949076] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.955465] bridge0: port 2(bridge_slave_1) entered forwarding state [ 27.962334] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.968736] bridge0: port 1(bridge_slave_0) entered forwarding state [ 27.995360] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 28.001501] 8021q: adding VLAN 0 to HW filter on device bond0 [ 28.011132] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 28.019500] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 28.038563] bridge0: port 1(bridge_slave_0) entered disabled state [ 28.045496] bridge0: port 2(bridge_slave_1) entered disabled state [ 28.054953] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 28.061667] 8021q: adding VLAN 0 to HW filter on device team0 [ 28.070976] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 28.079406] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.085870] bridge0: port 1(bridge_slave_0) entered forwarding state [ 28.106336] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 28.113990] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.120386] bridge0: port 2(bridge_slave_1) entered forwarding state [ 28.128312] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 28.136672] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 28.144377] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 28.152443] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 28.160212] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 28.168226] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 28.174271] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 28.188589] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 28.200430] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 28.207246] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 28.225460] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 28.272592] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 28.282413] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 28.309281] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 28.316784] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 28.323140] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 28.332647] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 28.340819] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 28.347780] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 28.356331] device veth0_vlan entered promiscuous mode [ 28.364307] device veth1_vlan entered promiscuous mode [ 28.370501] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 28.379410] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 28.390136] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 28.399267] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 28.407192] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 28.414261] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 28.423238] device veth0_macvtap entered promiscuous mode [ 28.429732] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 28.438525] device veth1_macvtap entered promiscuous mode [ 28.446718] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 28.455187] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 28.465928] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 28.472593] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 28.481425] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 28.490861] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 28.497705] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 28.565872] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 28.578353] HSR: VLAN not yet supported [ 28.578531] ------------[ cut here ]------------ [ 28.587270] WARNING: CPU: 1 PID: 7969 at net/hsr/hsr_forward.c:336 hsr_forward_skb.cold+0x18/0xef [ 28.596253] Kernel panic - not syncing: panic_on_warn set ... [ 28.596253] [ 28.603592] CPU: 1 PID: 7969 Comm: syz-executor229 Not tainted 4.14.277-syzkaller #0 [ 28.611537] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.620863] Call Trace: [ 28.623436] dump_stack+0x1b2/0x281 [ 28.627048] panic+0x1f9/0x42d [ 28.630218] ? add_taint.cold+0x16/0x16 [ 28.634168] ? hsr_forward_skb.cold+0x18/0xef [ 28.638663] ? hsr_forward_skb.cold+0x18/0xef [ 28.643133] __warn.cold+0x20/0x44 [ 28.646650] ? ist_end_non_atomic+0x10/0x10 [ 28.650949] ? hsr_forward_skb.cold+0x18/0xef [ 28.655429] report_bug+0x208/0x250 [ 28.659051] do_error_trap+0x195/0x2d0 [ 28.662913] ? math_error+0x2d0/0x2d0 [ 28.666689] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.671509] invalid_op+0x1b/0x40 [ 28.674940] RIP: 0010:hsr_forward_skb.cold+0x18/0xef [ 28.680014] RSP: 0018:ffff88808bfd7710 EFLAGS: 00010286 [ 28.685353] RAX: 000000000000001b RBX: ffff8880a91c3502 RCX: 0000000000000000 [ 28.692685] RDX: 0000000000000000 RSI: ffff888097324cc8 RDI: ffffed10117faed8 [ 28.699930] RBP: ffff88809bd01340 R08: 000000000000001b R09: 0000000000000000 [ 28.707173] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88809bd01406 [ 28.714420] R13: ffff88809ae1fe00 R14: ffff8880a91c350e R15: ffff88809bd01410 [ 28.721676] ? dev_queue_xmit_nit+0x6ef/0x950 [ 28.726149] hsr_dev_xmit+0x6b/0xa0 [ 28.729754] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 28.734744] dev_hard_start_xmit+0x188/0x890 [ 28.739132] __dev_queue_xmit+0x1d7f/0x2480 [ 28.743433] ? netdev_pick_tx+0x2e0/0x2e0 [ 28.747557] ? sock_kzfree_s+0x50/0x50 [ 28.751431] ? lock_acquire+0x170/0x3f0 [ 28.755383] ? skb_copy_datagram_from_iter+0x3c1/0x5f0 [ 28.760643] ? memcpy+0x35/0x50 [ 28.763898] packet_snd+0x13aa/0x26f0 [ 28.767684] ? __lock_acquire+0x5fc/0x3f20 [ 28.771893] ? prb_retire_rx_blk_timer_expired+0x630/0x630 [ 28.777493] ? __lock_acquire+0x5fc/0x3f20 [ 28.781705] ? release_pages+0x828/0xbf0 [ 28.785746] packet_sendmsg+0x12ed/0x33a0 [ 28.789869] ? lock_acquire+0x170/0x3f0 [ 28.793818] ? lock_downgrade+0x740/0x740 [ 28.797941] ? __might_fault+0x177/0x1b0 [ 28.801972] ? __might_fault+0x104/0x1b0 [ 28.806008] ? compat_packet_setsockopt+0x140/0x140 [ 28.810997] ? lock_acquire+0x170/0x3f0 [ 28.814942] ? lock_downgrade+0x740/0x740 [ 28.819067] ? __might_fault+0x177/0x1b0 [ 28.823103] ? security_socket_sendmsg+0x83/0xb0 [ 28.827832] ? compat_packet_setsockopt+0x140/0x140 [ 28.832823] sock_sendmsg+0xb5/0x100 [ 28.836510] SyS_sendto+0x1c7/0x2c0 [ 28.840112] ? SyS_getpeername+0x220/0x220 [ 28.844321] ? do_vfs_ioctl+0xe2/0xff0 [ 28.848229] ? security_file_ioctl+0x83/0xb0 [ 28.852612] ? do_syscall_64+0x4c/0x640 [ 28.856561] ? SyS_getpeername+0x220/0x220 [ 28.860770] do_syscall_64+0x1d5/0x640 [ 28.864640] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.869805] RIP: 0033:0x7fed3724f399 [ 28.873491] RSP: 002b:00007ffd3eba28d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 28.881174] RAX: ffffffffffffffda RBX: 00007ffd3eba28f8 RCX: 00007fed3724f399 [ 28.888418] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 28.895667] RBP: 0000000000000003 R08: 00000000200001c0 R09: 0000000000000014 [ 28.902916] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd3eba2900 [ 28.910169] R13: 00007ffd3eba2920 R14: 0000000000000000 R15: 0000000000000000 [ 28.918124] Kernel Offset: disabled [ 28.921776] Rebooting in 86400 seconds..