[   77.860388][   T28] audit: type=1800 audit(1579678751.589:25): pid=9513 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0
[   77.880394][   T28] audit: type=1800 audit(1579678751.599:26): pid=9513 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0
[   77.933132][   T28] audit: type=1800 audit(1579678751.599:27): pid=9513 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[   78.677166][ T9580] sshd (9580) used greatest stack depth: 22936 bytes left
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added '10.128.0.68' (ECDSA) to the list of known hosts.
syzkaller login: [   88.890089][ T9666] IPVS: ftp: loaded support on port[0] = 21
[   88.938941][ T9666] chnl_net:caif_netlink_parms(): no params data found
[   88.967035][ T9666] bridge0: port 1(bridge_slave_0) entered blocking state
[   88.974617][ T9666] bridge0: port 1(bridge_slave_0) entered disabled state
[   88.982377][ T9666] device bridge_slave_0 entered promiscuous mode
[   88.991764][ T9666] bridge0: port 2(bridge_slave_1) entered blocking state
[   88.999023][ T9666] bridge0: port 2(bridge_slave_1) entered disabled state
[   89.006950][ T9666] device bridge_slave_1 entered promiscuous mode
[   89.024021][ T9666] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[   89.035404][ T9666] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[   89.054884][ T9666] team0: Port device team_slave_0 added
[   89.062728][ T9666] team0: Port device team_slave_1 added
[   89.078075][ T9666] batman_adv: batadv0: Adding interface: batadv_slave_0
[   89.085284][ T9666] 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.
[   89.111570][ T9666] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
[   89.124512][ T9666] batman_adv: batadv0: Adding interface: batadv_slave_1
[   89.131463][ T9666] 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.
[   89.158198][ T9666] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
[   89.235706][ T9666] device hsr_slave_0 entered promiscuous mode
[   89.294269][ T9666] device hsr_slave_1 entered promiscuous mode
[   89.427727][ T9666] netdevsim netdevsim0 netdevsim0: renamed from eth0
[   89.466264][ T9666] netdevsim netdevsim0 netdevsim1: renamed from eth1
[   89.525526][ T9666] netdevsim netdevsim0 netdevsim2: renamed from eth2
[   89.565702][ T9666] netdevsim netdevsim0 netdevsim3: renamed from eth3
[   89.616307][ T9666] bridge0: port 2(bridge_slave_1) entered blocking state
[   89.623613][ T9666] bridge0: port 2(bridge_slave_1) entered forwarding state
[   89.631383][ T9666] bridge0: port 1(bridge_slave_0) entered blocking state
[   89.638630][ T9666] bridge0: port 1(bridge_slave_0) entered forwarding state
[   89.682093][ T9666] 8021q: adding VLAN 0 to HW filter on device bond0
[   89.697485][ T2784] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[   89.709479][ T2784] bridge0: port 1(bridge_slave_0) entered disabled state
[   89.717732][ T2784] bridge0: port 2(bridge_slave_1) entered disabled state
[   89.725994][ T2784] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready
[   89.740104][ T9666] 8021q: adding VLAN 0 to HW filter on device team0
[   89.752437][   T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready
[   89.762027][   T12] bridge0: port 1(bridge_slave_0) entered blocking state
[   89.769170][   T12] bridge0: port 1(bridge_slave_0) entered forwarding state
[   89.793682][ T2784] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready
[   89.802474][ T2784] bridge0: port 2(bridge_slave_1) entered blocking state
[   89.809616][ T2784] bridge0: port 2(bridge_slave_1) entered forwarding state
[   89.817713][ T2784] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready
[   89.826658][ T2784] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready
[   89.836164][ T2780] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
[   89.847358][   T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready
[   89.861122][ T9666] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network
[   89.874364][ T9666] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
[   89.883938][   T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
[   89.904878][ T2792] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready
[   89.912428][ T2792] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready
[   89.922637][ T9666] 8021q: adding VLAN 0 to HW filter on device batadv0
[   89.943148][ T2780] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready
[   89.951985][ T2780] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready
[   89.973071][   T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready
[   89.981661][   T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready
[   89.992336][   T12] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready
[   90.000992][   T12] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready
[   90.009266][ T9666] device veth0_vlan entered promiscuous mode
[   90.022050][ T9666] device veth1_vlan entered promiscuous mode
[   90.044757][ T2780] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready
[   90.054524][ T2780] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready
[   90.062674][ T2780] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready
[   90.071482][ T2780] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready
[   90.083242][ T9666] device veth0_macvtap entered promiscuous mode
[   90.092699][ T9666] device veth1_macvtap entered promiscuous mode
[   90.111269][ T9666] batman_adv: batadv0: Interface activated: batadv_slave_0
[   90.119083][   T12] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready
[   90.128534][   T12] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready
[   90.137007][   T12] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready
[   90.146658][   T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready
executing program
[   90.158887][ T9666] batman_adv: batadv0: Interface activated: batadv_slave_1
[   90.166696][ T2780] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready
[   90.175963][ T2780] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready
[   90.205063][ T9666] netlink: 'syz-executor050': attribute type 1 has an invalid length.
[   90.214679][ T9666] netlink: 'syz-executor050': attribute type 1 has an invalid length.
[   90.224158][    C1] ------------[ cut here ]------------
[   90.229817][    C1] Illegal XDP return value 4294967274, expect packet loss!
[   90.237840][    C1] WARNING: CPU: 1 PID: 16 at net/core/filter.c:6877 bpf_warn_invalid_xdp_action+0x77/0x90
[   90.247816][    C1] Kernel panic - not syncing: panic_on_warn set ...
[   90.253381][ T9666] netlink: 'syz-executor050': attribute type 1 has an invalid length.
[   90.254399][    C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.5.0-rc6-syzkaller #0
[   90.266377][ T9666] netlink: 'syz-executor050': attribute type 1 has an invalid length.
[   90.270944][    C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   90.270956][    C1] Call Trace:
[   90.279530][ T9666] netlink: 'syz-executor050': attribute type 1 has an invalid length.
[   90.289186][    C1]  dump_stack+0x197/0x210
[   90.289204][    C1]  ? __bpf_prog_release+0xf0/0x100
[   90.289218][    C1]  panic+0x2e3/0x75c
[   90.289230][    C1]  ? add_taint.cold+0x16/0x16
[   90.289249][    C1]  ? __kasan_check_write+0x14/0x20
[   90.289261][    C1]  ? __warn.cold+0x14/0x3e
[   90.289273][    C1]  ? __warn+0xd9/0x1cf
[   90.289294][    C1]  ? bpf_warn_invalid_xdp_action+0x77/0x90
[   90.289306][    C1]  __warn.cold+0x2f/0x3e
[   90.289320][    C1]  ? bpf_warn_invalid_xdp_action+0x77/0x90
[   90.289332][    C1]  report_bug+0x289/0x300
[   90.289351][    C1]  do_error_trap+0x11b/0x200
[   90.289366][    C1]  do_invalid_op+0x37/0x50
[   90.289377][    C1]  ? bpf_warn_invalid_xdp_action+0x77/0x90
[   90.289393][    C1]  invalid_op+0x23/0x30
[   90.289405][    C1] RIP: 0010:bpf_warn_invalid_xdp_action+0x77/0x90
[   90.289417][    C1] Code: 60 3a d7 88 41 83 fc 04 48 c7 c6 a0 3a d7 88 4c 0f 46 ee e8 eb 43 47 fb 44 89 e2 48 c7 c7 e0 3a d7 88 4c 89 ee e8 d8 f3 17 fb <0f> 0b e8 d2 43 47 fb 5b 41 5c 41 5d 5d c3 90 66 2e 0f 1f 84 00 00
[   90.289428][    C1] RSP: 0018:ffffc90000d7f858 EFLAGS: 00010282
[   90.289437][    C1] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[   90.289445][    C1] RDX: 0000000000000100 RSI: ffffffff815e5dd6 RDI: fffff520001afefd
[   90.289452][    C1] RBP: ffffc90000d7f870 R08: ffff8880a9a44440 R09: 0000000000000000
[   90.289458][    C1] R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffea
[   90.289466][    C1] R13: ffffffff88d73a60 R14: ffff8880a2ec4110 R15: ffff88809af426c0
[   90.289488][    C1]  ? vprintk_func+0x86/0x189
[   90.289504][    C1]  ? bpf_warn_invalid_xdp_action+0x77/0x90
[   90.289521][    C1]  do_xdp_generic.part.0+0xec9/0x17a0
[   90.289535][    C1]  ? trace_hardirqs_on+0x67/0x240
[   90.289559][    C1]  ? generic_xdp_tx+0x740/0x740
[   90.289574][    C1]  ? rcu_lockdep_current_cpu_online+0xe3/0x130
[   90.289593][    C1]  ? rcu_read_lock_held_common+0x130/0x130
[   90.289614][    C1]  __netif_receive_skb_core+0x68b/0x30b0
[   90.289626][    C1]  ? rcu_read_lock_held_common+0x130/0x130
[   90.289644][    C1]  ? __check_heap_object+0x80/0xb3
[   90.289659][    C1]  ? do_xdp_generic+0x50/0x50
[   90.289675][    C1]  ? __kasan_check_read+0x11/0x20
[   90.289688][    C1]  ? __lock_acquire+0x8a0/0x4a00
[   90.289718][    C1]  __netif_receive_skb_one_core+0xa8/0x1a0
[   90.289730][    C1]  ? __netif_receive_skb_one_core+0xa8/0x1a0
[   90.289750][    C1]  ? __netif_receive_skb_core+0x30b0/0x30b0
[   90.296480][ T9666] netlink: 'syz-executor050': attribute type 1 has an invalid length.
[   90.301225][    C1]  ? lock_acquire+0x190/0x410
[   90.306502][ T9666] netlink: 'syz-executor050': attribute type 1 has an invalid length.
[   90.310702][    C1]  ? process_backlog+0x195/0x750
[   90.316384][ T9666] netlink: 'syz-executor050': attribute type 1 has an invalid length.
[   90.319308][    C1]  __netif_receive_skb+0x2c/0x1d0
[   90.325548][ T9666] netlink: 'syz-executor050': attribute type 1 has an invalid length.
[   90.328944][    C1]  process_backlog+0x206/0x750
[   90.335552][ T9666] netlink: 'syz-executor050': attribute type 1 has an invalid length.
[   90.339011][    C1]  ? net_rx_action+0x27b/0x1120
[   90.344685][ T9666] IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
[   90.349310][    C1]  ? lockdep_hardirqs_on+0x19e/0x5e0
[   90.357477][ T9666] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready
[   90.358495][    C1]  net_rx_action+0x508/0x1120
[   90.363566][ T9666] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready
[   90.368981][    C1]  ? napi_busy_loop+0x970/0x970
[   90.369002][    C1]  ? rcu_read_lock_sched_held+0x9c/0xd0
[   90.640378][    C1]  ? rcu_read_lock_any_held.part.0+0x50/0x50
[   90.646372][    C1]  ? trace_hardirqs_on+0x67/0x240
[   90.651404][    C1]  __do_softirq+0x262/0x98c
[   90.655930][    C1]  ? takeover_tasklets+0x820/0x820
[   90.661032][    C1]  run_ksoftirqd+0x8e/0x110
[   90.665527][    C1]  smpboot_thread_fn+0x6a3/0xa40
[   90.670473][    C1]  ? __smpboot_create_thread.part.0+0x340/0x340
[   90.676720][    C1]  ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[   90.682959][    C1]  ? __kthread_parkme+0x108/0x1c0
[   90.688009][    C1]  ? __kasan_check_read+0x11/0x20
[   90.693190][    C1]  kthread+0x361/0x430
[   90.697482][    C1]  ? __smpboot_create_thread.part.0+0x340/0x340
[   90.703712][    C1]  ? kthread_mod_delayed_work+0x1f0/0x1f0
[   90.709441][    C1]  ret_from_fork+0x24/0x30
[   90.715344][    C1] Kernel Offset: disabled
[   90.719775][    C1] Rebooting in 86400 seconds..