[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.16' (ECDSA) to the list of known hosts. syzkaller login: [ 27.482167] IPVS: ftp: loaded support on port[0] = 21 [ 27.547850] chnl_net:caif_netlink_parms(): no params data found [ 27.619808] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.626542] bridge0: port 1(bridge_slave_0) entered disabled state [ 27.634074] device bridge_slave_0 entered promiscuous mode [ 27.641240] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.647597] bridge0: port 2(bridge_slave_1) entered disabled state [ 27.654726] device bridge_slave_1 entered promiscuous mode [ 27.671289] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 27.679826] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 27.697789] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 27.705267] team0: Port device team_slave_0 added [ 27.710804] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 27.718261] team0: Port device team_slave_1 added [ 27.732776] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 27.738998] 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. [ 27.764245] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 27.775427] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 27.781765] 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. [ 27.806999] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 27.817770] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 27.825271] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 27.843520] device hsr_slave_0 entered promiscuous mode [ 27.849077] device hsr_slave_1 entered promiscuous mode [ 27.855181] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 27.862345] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 27.919697] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.926103] bridge0: port 2(bridge_slave_1) entered forwarding state [ 27.932938] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.939283] bridge0: port 1(bridge_slave_0) entered forwarding state [ 27.967183] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 27.973269] 8021q: adding VLAN 0 to HW filter on device bond0 [ 27.981854] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 27.989556] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 27.998609] bridge0: port 1(bridge_slave_0) entered disabled state [ 28.005882] bridge0: port 2(bridge_slave_1) entered disabled state [ 28.015747] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 28.022121] 8021q: adding VLAN 0 to HW filter on device team0 [ 28.030192] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 28.037821] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.044193] bridge0: port 1(bridge_slave_0) entered forwarding state [ 28.061160] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 28.068668] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.075041] bridge0: port 2(bridge_slave_1) entered forwarding state [ 28.082915] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 28.091796] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 28.099199] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 28.107745] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 28.117276] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 28.127972] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 28.134098] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 28.141282] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 28.155817] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 28.162877] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 28.169483] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 28.181088] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 28.227483] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 28.236791] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 28.265651] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 28.272761] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 28.279116] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 28.288651] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 28.296394] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 28.303587] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 28.311864] device veth0_vlan entered promiscuous mode [ 28.320735] device veth1_vlan entered promiscuous mode [ 28.326430] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 28.335140] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 28.345334] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 28.354551] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 28.361995] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 28.369041] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 28.378305] device veth0_macvtap entered promiscuous mode [ 28.384635] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 28.392643] device veth1_macvtap entered promiscuous mode [ 28.400932] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 28.409666] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 28.419119] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 28.427146] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 28.435355] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 28.444982] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 28.452488] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 28.528273] HSR: VLAN not yet supported [ 28.528422] ------------[ cut here ]------------ [ 28.537185] WARNING: CPU: 0 PID: 7979 at net/hsr/hsr_forward.c:336 hsr_forward_skb.cold+0x18/0xef [ 28.546260] Kernel panic - not syncing: panic_on_warn set ... [ 28.546260] [ 28.553604] CPU: 0 PID: 7979 Comm: syz-executor124 Not tainted 4.14.291-syzkaller #0 [ 28.561462] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 28.570794] Call Trace: [ 28.573361] dump_stack+0x1b2/0x281 [ 28.576962] panic+0x1f9/0x42d [ 28.580130] ? add_taint.cold+0x16/0x16 [ 28.584094] ? hsr_forward_skb.cold+0x18/0xef [ 28.588565] ? hsr_forward_skb.cold+0x18/0xef [ 28.593037] __warn.cold+0x20/0x44 [ 28.596553] ? ist_end_non_atomic+0x10/0x10 [ 28.600851] ? hsr_forward_skb.cold+0x18/0xef [ 28.605320] report_bug+0x208/0x250 [ 28.608934] do_error_trap+0x195/0x2d0 [ 28.612803] ? math_error+0x2d0/0x2d0 [ 28.616588] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.621427] invalid_op+0x1b/0x40 [ 28.624856] RIP: 0010:hsr_forward_skb.cold+0x18/0xef [ 28.630023] RSP: 0018:ffff8880b370f710 EFLAGS: 00010286 [ 28.635380] RAX: 000000000000001b RBX: ffff8880a5c37002 RCX: 0000000000000000 [ 28.642627] RDX: 0000000000000000 RSI: ffff8880b3e62a08 RDI: ffffed10166e1ed8 [ 28.649871] RBP: ffff8880b2fd1480 R08: 000000000000001b R09: 0000000000000000 [ 28.657113] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b2fd1546 [ 28.664361] R13: ffff88809d99a000 R14: ffff8880a5c3700e R15: ffff8880b2fd1550 [ 28.671620] ? dev_queue_xmit_nit+0x6ef/0x950 [ 28.676110] hsr_dev_xmit+0x6b/0xa0 [ 28.679718] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 28.684721] dev_hard_start_xmit+0x188/0x890 [ 28.689124] __dev_queue_xmit+0x1d7f/0x2480 [ 28.693433] ? netdev_pick_tx+0x2e0/0x2e0 [ 28.697566] ? sock_kzfree_s+0x50/0x50 [ 28.701431] ? lock_acquire+0x170/0x3f0 [ 28.705381] ? skb_copy_datagram_from_iter+0x3c1/0x5f0 [ 28.710647] ? memcpy+0x35/0x50 [ 28.713902] packet_snd+0x13aa/0x26f0 [ 28.717680] ? __lock_acquire+0x5fc/0x3f20 [ 28.721888] ? prb_retire_rx_blk_timer_expired+0x630/0x630 [ 28.727495] ? __lock_acquire+0x5fc/0x3f20 [ 28.731722] ? release_pages+0x828/0xbf0 [ 28.735770] packet_sendmsg+0x12ed/0x33a0 [ 28.739916] ? lock_acquire+0x170/0x3f0 [ 28.743863] ? lock_downgrade+0x740/0x740 [ 28.747996] ? __might_fault+0x177/0x1b0 [ 28.752033] ? __might_fault+0x104/0x1b0 [ 28.756073] ? compat_packet_setsockopt+0x140/0x140 [ 28.761062] ? lock_acquire+0x170/0x3f0 [ 28.765009] ? lock_downgrade+0x740/0x740 [ 28.769137] ? __might_fault+0x177/0x1b0 [ 28.773183] ? security_socket_sendmsg+0x83/0xb0 [ 28.777917] ? compat_packet_setsockopt+0x140/0x140 [ 28.782907] sock_sendmsg+0xb5/0x100 [ 28.786615] SyS_sendto+0x1c7/0x2c0 [ 28.790214] ? SyS_getpeername+0x220/0x220 [ 28.794427] ? do_vfs_ioctl+0xe2/0xff0 [ 28.798298] ? security_file_ioctl+0x83/0xb0 [ 28.802694] ? do_syscall_64+0x4c/0x640 [ 28.806641] ? SyS_getpeername+0x220/0x220 [ 28.810854] do_syscall_64+0x1d5/0x640 [ 28.814717] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.819903] RIP: 0033:0x7f9aa251d3d9 [ 28.823588] RSP: 002b:00007ffcba65d9b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 28.831270] RAX: ffffffffffffffda RBX: 00007ffcba65d9d8 RCX: 00007f9aa251d3d9 [ 28.838522] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 28.845766] RBP: 0000000000000003 R08: 0000000020000140 R09: 0000000000000014 [ 28.853010] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcba65d9e0 [ 28.860261] R13: 00007ffcba65da00 R14: 0000000000000000 R15: 0000000000000000 [ 28.867756] Kernel Offset: disabled [ 28.871396] Rebooting in 86400 seconds..