Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.97' (ECDSA) to the list of known hosts. syzkaller login: [ 27.664533] IPVS: ftp: loaded support on port[0] = 21 [ 27.725905] chnl_net:caif_netlink_parms(): no params data found [ 27.816614] bridge0: port 1(bridge_slave_0) entered blocking state [ 27.823240] bridge0: port 1(bridge_slave_0) entered disabled state [ 27.831029] device bridge_slave_0 entered promiscuous mode [ 27.837701] bridge0: port 2(bridge_slave_1) entered blocking state [ 27.844934] bridge0: port 2(bridge_slave_1) entered disabled state [ 27.852123] device bridge_slave_1 entered promiscuous mode [ 27.867167] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 27.875685] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 27.892345] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 27.899437] team0: Port device team_slave_0 added [ 27.905177] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 27.912562] team0: Port device team_slave_1 added [ 27.926429] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 27.932720] 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. [ 27.958656] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 27.970570] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 27.976853] 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. [ 28.002799] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 28.013493] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 28.021153] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 28.038363] device hsr_slave_0 entered promiscuous mode [ 28.043987] device hsr_slave_1 entered promiscuous mode [ 28.049808] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 28.057516] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 28.112201] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.118629] bridge0: port 2(bridge_slave_1) entered forwarding state [ 28.125423] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.131810] bridge0: port 1(bridge_slave_0) entered forwarding state [ 28.157739] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 28.163934] 8021q: adding VLAN 0 to HW filter on device bond0 [ 28.173414] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 28.181940] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 28.189450] bridge0: port 1(bridge_slave_0) entered disabled state [ 28.197390] bridge0: port 2(bridge_slave_1) entered disabled state [ 28.206148] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 28.212942] 8021q: adding VLAN 0 to HW filter on device team0 [ 28.221134] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 28.228643] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.235099] bridge0: port 1(bridge_slave_0) entered forwarding state [ 28.244177] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 28.252344] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.258662] bridge0: port 2(bridge_slave_1) entered forwarding state [ 28.275981] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 28.285753] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 28.296405] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 28.304007] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 28.312123] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 28.319497] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 28.327119] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 28.334798] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 28.341633] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 28.354112] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 28.361124] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 28.367750] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 28.378105] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 28.423327] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 28.432839] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 28.461237] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 28.468101] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 28.475474] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 28.484668] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 28.492357] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 28.499141] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 28.507975] device veth0_vlan entered promiscuous mode [ 28.516574] device veth1_vlan entered promiscuous mode [ 28.522568] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 28.531521] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 28.542720] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 28.551798] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 28.558897] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 28.566226] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 28.575053] device veth0_macvtap entered promiscuous mode [ 28.581382] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 28.588970] device veth1_macvtap entered promiscuous mode [ 28.597778] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 28.606809] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 28.616911] batman_adv: batadv0: Interface activated: batadv_slave_0 executing program [ 28.624169] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 28.632603] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 28.642274] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 28.649902] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 28.710053] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 28.729105] IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready [ 28.736451] IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready [ 28.745487] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 28.753106] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 28.759848] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 28.766454] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 28.781049] Illegal XDP return value 4294967274, expect packet loss! [ 28.787712] ------------[ cut here ]------------ [ 28.792454] WARNING: CPU: 1 PID: 7987 at net/core/filter.c:3647 bpf_warn_invalid_xdp_action.cold+0x3c/0x43 [ 28.802219] Kernel panic - not syncing: panic_on_warn set ... [ 28.802219] [ 28.809598] CPU: 1 PID: 7987 Comm: syz-executor857 Not tainted 4.14.235-syzkaller #0 [ 28.817498] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.826829] Call Trace: [ 28.829397] dump_stack+0x1b2/0x281 [ 28.833000] panic+0x1f9/0x42d [ 28.836216] ? add_taint.cold+0x16/0x16 [ 28.840179] ? bpf_warn_invalid_xdp_action.cold+0x3c/0x43 [ 28.845714] ? bpf_warn_invalid_xdp_action.cold+0x3c/0x43 [ 28.851231] __warn.cold+0x20/0x44 [ 28.854747] ? ist_end_non_atomic+0x10/0x10 [ 28.859042] ? bpf_warn_invalid_xdp_action.cold+0x3c/0x43 [ 28.864557] report_bug+0x208/0x250 [ 28.868166] do_error_trap+0x195/0x2d0 [ 28.872031] ? math_error+0x2d0/0x2d0 [ 28.875810] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.880645] invalid_op+0x1b/0x40 [ 28.884078] RIP: 0010:bpf_warn_invalid_xdp_action.cold+0x3c/0x43 [ 28.890195] RSP: 0018:ffff888095aa7460 EFLAGS: 00010282 [ 28.895534] RAX: 0000000000000038 RBX: 1ffff11012b54e95 RCX: 0000000000000000 [ 28.902779] RDX: 0000000000000000 RSI: ffffffff878bbbc0 RDI: ffffed1012b54e82 [ 28.910040] RBP: ffffffff88563480 R08: 0000000000000038 R09: 0000000000000000 [ 28.917284] R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffea [ 28.924531] R13: ffffc900019bf000 R14: 0000000000000000 R15: ffff888095497786 [ 28.931808] netif_receive_generic_xdp+0x554/0x950 [ 28.936733] ? flush_backlog+0x620/0x620 [ 28.940791] ? lock_acquire+0x170/0x3f0 [ 28.944741] ? check_preemption_disabled+0x35/0x240 [ 28.949735] do_xdp_generic.part.0+0x22/0xc0 [ 28.954116] netif_rx_internal+0x219/0x800 [ 28.958421] ? eth_type_trans+0x281/0x5b0 [ 28.962647] ? do_xdp_generic.part.0+0xc0/0xc0 [ 28.967207] ? __dev_forward_skb+0x3e7/0x610 [ 28.971639] dev_forward_skb+0x39/0x50 [ 28.975507] veth_xmit+0xf1/0x300 [ 28.978934] dev_hard_start_xmit+0x188/0x890 [ 28.983322] __dev_queue_xmit+0x1d7f/0x2480 [ 28.987620] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 28.993167] ? netdev_pick_tx+0x2e0/0x2e0 [ 28.997294] ? __kmalloc_node_track_caller+0x38/0x70 [ 29.002373] ? skb_release_data+0xf3/0x820 [ 29.006599] ? skb_headers_offset_update+0x110/0x240 [ 29.011722] ? pskb_expand_head+0x4cc/0xd30 [ 29.016022] ? check_preemption_disabled+0x35/0x240 [ 29.021029] __bpf_redirect+0x5cf/0x9c0 [ 29.024994] bpf_clone_redirect+0x1e1/0x2c0 [ 29.029290] ? __bpf_redirect+0x9c0/0x9c0 [ 29.033413] ___bpf_prog_run+0x252b/0x5a70 [ 29.037621] ? bpf_jit_compile+0x30/0x30 [ 29.041659] ? lock_acquire+0x170/0x3f0 [ 29.045607] ? lock_downgrade+0x740/0x740 [ 29.049730] ? __bpf_prog_run512+0x86/0xb0 [ 29.053948] ? ___bpf_prog_run+0x5a70/0x5a70 [ 29.058337] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 29.063421] ? __lock_acquire+0x5fc/0x3f20 [ 29.067629] ? __lock_acquire+0x5fc/0x3f20 [ 29.071838] ? __fd_install+0x1ec/0x5c0 [ 29.075785] ? trace_hardirqs_on+0x10/0x10 [ 29.080027] ? trace_hardirqs_on+0x10/0x10 [ 29.084279] ? trace_hardirqs_on+0x10/0x10 [ 29.088486] ? __lock_acquire+0x5fc/0x3f20 [ 29.092699] ? bpf_test_run+0x4c/0x330 [ 29.096588] ? lock_downgrade+0x740/0x740 [ 29.100724] ? lock_acquire+0x170/0x3f0 [ 29.104682] ? check_preemption_disabled+0x35/0x240 [ 29.109717] ? bpf_test_run+0xa5/0x330 [ 29.113588] ? bpf_prog_test_run_skb+0x629/0x8c0 [ 29.118341] ? bpf_test_finish.isra.0+0x140/0x140 [ 29.123160] ? bpf_prog_add+0x43/0xa0 [ 29.126933] ? SyS_bpf+0x547/0x35e0 [ 29.130533] ? bpf_test_finish.isra.0+0x140/0x140 [ 29.135350] ? sockfd_lookup_light+0xb2/0x160 [ 29.139826] ? bpf_prog_get+0x20/0x20 [ 29.143608] ? __sys_sendmsg+0xb6/0x120 [ 29.147553] ? SyS_shutdown+0x160/0x160 [ 29.151514] ? do_syscall_64+0x4c/0x640 [ 29.155463] ? bpf_prog_get+0x20/0x20 [ 29.159247] ? do_syscall_64+0x1d5/0x640 [ 29.163288] ? entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 29.169685] Kernel Offset: disabled [ 29.173346] Rebooting in 86400 seconds..