[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ 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... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.149' (ECDSA) to the list of known hosts. syzkaller login: [ 61.719743][ T6859] IPVS: ftp: loaded support on port[0] = 21 [ 61.869119][ T6859] chnl_net:caif_netlink_parms(): no params data found [ 61.928538][ T6859] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.937145][ T6859] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.946839][ T6859] device bridge_slave_0 entered promiscuous mode [ 61.956284][ T6859] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.963672][ T6859] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.972202][ T6859] device bridge_slave_1 entered promiscuous mode [ 61.994594][ T6859] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 62.005920][ T6859] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 62.031242][ T6859] team0: Port device team_slave_0 added [ 62.039153][ T6859] team0: Port device team_slave_1 added [ 62.057551][ T6859] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 62.064643][ T6859] 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. [ 62.090873][ T6859] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 62.104492][ T6859] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 62.111572][ T6859] 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. [ 62.137575][ T6859] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 62.167806][ T6859] device hsr_slave_0 entered promiscuous mode [ 62.175335][ T6859] device hsr_slave_1 entered promiscuous mode [ 62.283039][ T6859] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 62.295367][ T6859] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 62.306473][ T6859] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 62.317798][ T6859] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 62.345261][ T6859] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.352734][ T6859] bridge0: port 2(bridge_slave_1) entered forwarding state [ 62.360789][ T6859] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.368064][ T6859] bridge0: port 1(bridge_slave_0) entered forwarding state [ 62.419757][ T6859] 8021q: adding VLAN 0 to HW filter on device bond0 [ 62.434548][ T2463] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 62.447048][ T2463] bridge0: port 1(bridge_slave_0) entered disabled state [ 62.456085][ T2463] bridge0: port 2(bridge_slave_1) entered disabled state [ 62.465119][ T2463] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 62.479271][ T6859] 8021q: adding VLAN 0 to HW filter on device team0 [ 62.492833][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 62.502524][ T5] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.509711][ T5] bridge0: port 1(bridge_slave_0) entered forwarding state [ 62.528165][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 62.536729][ T23] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.543898][ T23] bridge0: port 2(bridge_slave_1) entered forwarding state [ 62.564339][ T3972] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 62.574156][ T3972] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 62.591168][ T6859] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 62.603836][ T6859] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 62.616892][ T3972] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 62.625136][ T3972] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 62.634674][ T3972] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 62.643450][ T3972] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 62.664954][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 62.673235][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 62.690409][ T6859] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 62.713004][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 62.734650][ T3972] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 62.745658][ T3972] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 62.754557][ T3972] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 62.766551][ T6859] device veth0_vlan entered promiscuous mode [ 62.778466][ T6859] device veth1_vlan entered promiscuous mode [ 62.802733][ T3100] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 62.812759][ T3100] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 62.821225][ T3100] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 62.836191][ T6859] device veth0_macvtap entered promiscuous mode [ 62.847255][ T6859] device veth1_macvtap entered promiscuous mode [ 62.866602][ T6859] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 62.875588][ T3972] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 62.886114][ T3972] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 62.899177][ T6859] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 62.908913][ T3972] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 62.919320][ T3972] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 62.934545][ T6859] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 62.943973][ T6859] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 62.955926][ T6859] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 62.965739][ T6859] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 63.016229][ T6859] IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready [ 63.028012][ T6859] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 63.035812][ T6859] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 63.062338][ C0] ------------[ cut here ]------------ [ 63.067979][ C0] Illegal XDP return value 4294967274, expect packet loss! [ 63.076894][ C0] WARNING: CPU: 0 PID: 5 at net/core/filter.c:7193 bpf_warn_invalid_xdp_action+0x6f/0x80 [ 63.089284][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 63.095906][ C0] CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.9.0-rc3-syzkaller #0 [ 63.103999][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.114094][ C0] Workqueue: ipv6_addrconf addrconf_dad_work [ 63.120080][ C0] Call Trace: [ 63.123380][ C0] [ 63.126263][ C0] dump_stack+0x198/0x1fd [ 63.130607][ C0] panic+0x347/0x7c0 [ 63.134693][ C0] ? __warn_printk+0xf3/0xf3 [ 63.146823][ C0] ? __warn.cold+0x5/0x46 [ 63.151155][ C0] ? __warn+0xd6/0x1f2 [ 63.155226][ C0] ? bpf_warn_invalid_xdp_action+0x6f/0x80 [ 63.161141][ C0] __warn.cold+0x20/0x46 [ 63.165394][ C0] ? wake_up_klogd.part.0+0x8c/0xc0 [ 63.170587][ C0] ? bpf_warn_invalid_xdp_action+0x6f/0x80 [ 63.176867][ C0] report_bug+0x1bd/0x210 [ 63.181256][ C0] handle_bug+0x38/0x90 [ 63.186806][ C0] exc_invalid_op+0x14/0x40 [ 63.191345][ C0] asm_exc_invalid_op+0x12/0x20 [ 63.196204][ C0] RIP: 0010:bpf_warn_invalid_xdp_action+0x6f/0x80 [ 63.202617][ C0] Code: 80 e7 ff 88 41 83 fc 04 48 c7 c6 c0 e7 ff 88 48 0f 46 ee e8 33 97 2d fb 44 89 e2 48 c7 c7 00 e8 ff 88 48 89 ee e8 a3 9a fe fa <0f> 0b 5b 5d 41 5c e9 16 97 2d fb 66 0f 1f 44 00 00 41 57 41 56 49 [ 63.222237][ C0] RSP: 0018:ffffc90000007a88 EFLAGS: 00010282 [ 63.228294][ C0] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 63.236552][ C0] RDX: ffff8880a95e2140 RSI: ffffffff815db9a7 RDI: fffff52000000f43 [ 63.244546][ C0] RBP: ffffffff88ffe780 R08: 0000000000000001 R09: ffff8880ae6318e7 [ 63.253620][ C0] R10: 0000000000000000 R11: 0000000000003043 R12: 00000000ffffffea [ 63.265064][ C0] R13: 0000000000000001 R14: 0000000000000608 R15: ffffc90000007c78 [ 63.273147][ C0] ? vprintk_func+0x97/0x1a6 [ 63.277771][ C0] ? bpf_warn_invalid_xdp_action+0x6f/0x80 [ 63.284415][ C0] netif_receive_generic_xdp+0xe58/0x1760 [ 63.290267][ C0] ? lock_is_held_type+0xbb/0xf0 [ 63.295211][ C0] __netif_receive_skb_core+0x11ee/0x3690 [ 63.300958][ C0] ? generic_xdp_tx+0x710/0x710 [ 63.305808][ C0] ? call_timer_fn+0x213/0x760 [ 63.310563][ C0] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 63.316555][ C0] ? lock_acquire+0x1f3/0xae0 [ 63.321256][ C0] __netif_receive_skb_one_core+0xae/0x180 [ 63.327081][ C0] ? __netif_receive_skb_core+0x3690/0x3690 [ 63.332974][ C0] ? mark_held_locks+0x9f/0xe0 [ 63.342757][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 63.348398][ C0] __netif_receive_skb+0x27/0x1c0 [ 63.353459][ C0] process_backlog+0x2e1/0x8e0 [ 63.358267][ C0] ? net_rx_action+0x298/0xf90 [ 63.363042][ C0] net_rx_action+0x4f8/0xf90 [ 63.367905][ C0] ? napi_complete_done+0x940/0x940 [ 63.373384][ C0] ? mark_held_locks+0x9f/0xe0 [ 63.378328][ C0] ? sched_clock_cpu+0x18/0x1b0 [ 63.383570][ C0] ? lock_is_held_type+0xbb/0xf0 [ 63.388531][ C0] __do_softirq+0x1f7/0xa91 [ 63.393324][ C0] asm_call_on_stack+0xf/0x20 [ 63.397986][ C0] [ 63.400917][ C0] do_softirq_own_stack+0x9d/0xd0 [ 63.405943][ C0] do_softirq+0x154/0x1b0 [ 63.410256][ C0] ? ip6_finish_output2+0x8e5/0x1780 [ 63.415546][ C0] __local_bh_enable_ip+0x196/0x1f0 [ 63.420757][ C0] ip6_finish_output2+0x913/0x1780 [ 63.425881][ C0] __ip6_finish_output+0x447/0xab0 [ 63.431000][ C0] ip6_finish_output+0x34/0x1f0 [ 63.438976][ C0] ip6_output+0x1db/0x520 [ 63.444530][ C0] ndisc_send_skb+0xa69/0x1720 [ 63.450247][ C0] ? ndisc_ifinfo_sysctl_change+0x5c0/0x5c0 [ 63.456186][ C0] ? ndisc_parse_options.part.0+0x480/0x480 [ 63.462198][ C0] ? __alloc_skb+0x34a/0x550 [ 63.466821][ C0] ? skb_set_owner_w+0x24e/0x400 [ 63.471956][ C0] ndisc_send_ns+0x3a9/0x850 [ 63.478931][ C0] ? addrconf_dad_work+0xb4f/0x1280 [ 63.484234][ C0] ? pndisc_redo+0x20/0x20 [ 63.489538][ C0] ? mark_held_locks+0x9f/0xe0 [ 63.494315][ C0] ? addrconf_dad_work+0xb4f/0x1280 [ 63.499513][ C0] ? __local_bh_enable_ip+0x10f/0x1f0 [ 63.504886][ C0] ? check_preemption_disabled+0x50/0x130 [ 63.510621][ C0] ? __local_bh_enable_ip+0x10f/0x1f0 [ 63.516021][ C0] ? addrconf_dad_work+0xb4f/0x1280 [ 63.521240][ C0] ? lockdep_hardirqs_on+0x53/0x100 [ 63.526458][ C0] addrconf_dad_work+0xc1c/0x1280 [ 63.531476][ C0] ? addrconf_dad_completed+0xcd0/0xcd0 [ 63.537907][ C0] ? lock_is_held_type+0xbb/0xf0 [ 63.542866][ C0] process_one_work+0x94c/0x1670 [ 63.548001][ C0] ? lock_release+0x8f0/0x8f0 [ 63.552688][ C0] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 63.558147][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 63.563092][ C0] ? lockdep_hardirqs_off+0x96/0xd0 [ 63.568322][ C0] worker_thread+0x64c/0x1120 [ 63.573128][ C0] ? process_one_work+0x1670/0x1670 [ 63.578341][ C0] kthread+0x3b5/0x4a0 [ 63.582542][ C0] ? __kthread_bind_mask+0xc0/0xc0 [ 63.587669][ C0] ret_from_fork+0x1f/0x30 [ 63.593465][ C0] Kernel Offset: disabled [ 63.597897][ C0] Rebooting in 86400 seconds..