[ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ 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 '10.128.1.78' (ECDSA) to the list of known hosts. syzkaller login: [ 35.079701] IPVS: ftp: loaded support on port[0] = 21 [ 35.150726] chnl_net:caif_netlink_parms(): no params data found [ 35.230576] bridge0: port 1(bridge_slave_0) entered blocking state [ 35.237407] bridge0: port 1(bridge_slave_0) entered disabled state [ 35.244513] device bridge_slave_0 entered promiscuous mode [ 35.252727] bridge0: port 2(bridge_slave_1) entered blocking state [ 35.259474] bridge0: port 2(bridge_slave_1) entered disabled state [ 35.266505] device bridge_slave_1 entered promiscuous mode [ 35.284211] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 35.293117] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 35.311148] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 35.318865] team0: Port device team_slave_0 added [ 35.324340] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 35.332018] team0: Port device team_slave_1 added [ 35.348049] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 35.354462] 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. [ 35.381587] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 35.393981] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 35.400421] 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. [ 35.426560] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 35.437684] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 35.445149] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 35.465535] device hsr_slave_0 entered promiscuous mode [ 35.471441] device hsr_slave_1 entered promiscuous mode [ 35.478455] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 35.485820] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 35.558505] bridge0: port 2(bridge_slave_1) entered blocking state [ 35.564914] bridge0: port 2(bridge_slave_1) entered forwarding state [ 35.571932] bridge0: port 1(bridge_slave_0) entered blocking state [ 35.578644] bridge0: port 1(bridge_slave_0) entered forwarding state [ 35.611723] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 35.619764] 8021q: adding VLAN 0 to HW filter on device bond0 [ 35.628735] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 35.639592] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 35.649022] bridge0: port 1(bridge_slave_0) entered disabled state [ 35.656079] bridge0: port 2(bridge_slave_1) entered disabled state [ 35.663688] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 35.675085] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 35.681412] 8021q: adding VLAN 0 to HW filter on device team0 [ 35.690835] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 35.698611] bridge0: port 1(bridge_slave_0) entered blocking state [ 35.704960] bridge0: port 1(bridge_slave_0) entered forwarding state [ 35.718495] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 35.726134] bridge0: port 2(bridge_slave_1) entered blocking state [ 35.732721] bridge0: port 2(bridge_slave_1) entered forwarding state [ 35.743342] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 35.751912] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 35.762224] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 35.773284] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 35.783869] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 35.793860] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 35.800580] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 35.813956] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 35.822151] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 35.829224] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 35.839873] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 35.853284] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 35.863251] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 35.894625] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 35.902435] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 35.909508] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 35.920400] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 35.928324] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 35.935150] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 35.944802] device veth0_vlan entered promiscuous mode [ 35.954276] device veth1_vlan entered promiscuous mode [ 35.960656] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 35.969433] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 35.982248] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 35.992239] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 35.999870] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 36.007557] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 36.017482] device veth0_macvtap entered promiscuous mode [ 36.023855] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 36.033229] device veth1_macvtap entered promiscuous mode [ 36.043007] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 36.052465] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 36.063429] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 36.070673] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 36.079072] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 36.090118] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 36.097343] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: 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 [ 36.348419] ------------[ cut here ]------------ [ 36.353390] hsr_addr_subst_dest: Unknown node [ 36.358572] WARNING: CPU: 0 PID: 8336 at net/hsr/hsr_framereg.c:313 hsr_addr_subst_dest+0x3ae/0x450 [ 36.367766] Kernel panic - not syncing: panic_on_warn set ... [ 36.367766] [ 36.375120] CPU: 0 PID: 8336 Comm: syz-executor191 Not tainted 4.19.177-syzkaller #0 [ 36.382987] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.393797] Call Trace: [ 36.396381] dump_stack+0x1fc/0x2ef [ 36.399993] panic+0x26a/0x50e [ 36.403167] ? __warn_printk+0xf3/0xf3 [ 36.407038] ? hsr_addr_subst_dest+0x3ae/0x450 [ 36.411611] ? __probe_kernel_read+0x130/0x1b0 [ 36.416178] ? __warn.cold+0x5/0x5a [ 36.419797] ? __warn+0xe4/0x200 [ 36.423144] ? hsr_addr_subst_dest+0x3ae/0x450 [ 36.427708] __warn.cold+0x20/0x5a [ 36.431257] ? hsr_addr_subst_dest+0x3ae/0x450 [ 36.435825] report_bug+0x262/0x2b0 [ 36.439445] do_error_trap+0x1d7/0x310 [ 36.443431] ? math_error+0x310/0x310 [ 36.447312] ? __irq_work_queue_local+0x101/0x160 [ 36.452158] ? irq_work_queue+0x29/0x80 [ 36.456128] ? error_entry+0x72/0xd0 [ 36.459843] ? trace_hardirqs_off_caller+0x6e/0x210 [ 36.465639] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.471958] invalid_op+0x14/0x20 [ 36.475489] RIP: 0010:hsr_addr_subst_dest+0x3ae/0x450 [ 36.480683] Code: a5 7a f9 84 db 0f 85 49 fd ff ff e8 2c a4 7a f9 48 c7 c6 e0 50 70 89 48 c7 c7 a0 50 70 89 c6 05 57 cd 26 03 01 e8 67 0d 08 00 <0f> 0b e9 23 fd ff ff e8 46 57 b0 f9 e9 c2 fd ff ff 48 89 ef e8 c9 [ 36.499598] RSP: 0018:ffff8880afc5f7a0 EFLAGS: 00010282 [ 36.504978] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 36.512240] RDX: 0000000000000000 RSI: ffffffff814de301 RDI: ffffed1015f8bee6 [ 36.519596] RBP: ffff8880a966a802 R08: 0000000000000001 R09: 0000000000000000 [ 36.526857] R10: 0000000000000005 R11: 0000000000000000 R12: 00000000f5ff2c00 [ 36.534120] R13: ffff888094b09720 R14: 00000000489c3f6d R15: 000000000000017b [ 36.541386] ? vprintk_func+0x81/0x180 [ 36.546140] hsr_forward_skb+0x1284/0x1c30 [ 36.550387] hsr_dev_xmit+0x6b/0xa0 [ 36.554013] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 36.559131] dev_hard_start_xmit+0x1a8/0x920 [ 36.563533] __dev_queue_xmit+0x269d/0x2e00 [ 36.567863] ? netdev_pick_tx+0x2f0/0x2f0 [ 36.572056] ? copy_page_from_iter+0x5bd/0x7f0 [ 36.576638] ? skb_copy_datagram_from_iter+0x45f/0x680 [ 36.581903] ? skb_partial_csum_set+0x257/0x2f0 [ 36.586561] packet_sendmsg+0x2474/0x6b00 [ 36.591791] ? aa_sk_perm+0x534/0x930 [ 36.595577] ? compat_packet_setsockopt+0x160/0x160 [ 36.600601] ? aa_af_perm+0x230/0x230 [ 36.604441] ? packet_do_bind+0x459/0xc00 [ 36.608581] ? compat_packet_setsockopt+0x160/0x160 [ 36.613588] sock_sendmsg+0xc3/0x120 [ 36.617575] __sys_sendto+0x21a/0x320 [ 36.621589] ? __ia32_sys_getpeername+0xb0/0xb0 [ 36.626593] ? packet_do_bind+0x459/0xc00 [ 36.630743] ? __sys_bind+0x111/0x250 [ 36.634542] ? __ia32_sys_socketpair+0xf0/0xf0 [ 36.639115] ? __x64_sys_sendmsg+0x159/0x220 [ 36.643542] __x64_sys_sendto+0xdd/0x1b0 [ 36.647647] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 36.652616] do_syscall_64+0xf9/0x620 [ 36.656562] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.661768] RIP: 0033:0x443959 [ 36.665061] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 36.684038] RSP: 002b:00007ffc997079c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 36.692371] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443959 [ 36.699646] RDX: 0000000000003287 RSI: 0000000020000080 RDI: 0000000000000003 [ 36.706910] RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000002ff [ 36.714177] R10: 0000000004000002 R11: 0000000000000246 R12: 00007ffc997079f0 [ 36.722291] R13: 00000000000f4240 R14: 0000000000008df6 R15: 00007ffc997079e4 [ 36.731586] Kernel Offset: disabled [ 36.735278] Rebooting in 86400 seconds..