[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 79.150967][ T27] audit: type=1800 audit(1584931978.027:25): pid=9258 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 79.171164][ T27] audit: type=1800 audit(1584931978.027:26): pid=9258 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 79.230517][ T27] audit: type=1800 audit(1584931978.027:27): pid=9258 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. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.12' (ECDSA) to the list of known hosts. syzkaller login: [ 89.243446][ T9416] IPVS: ftp: loaded support on port[0] = 21 [ 89.300181][ T9416] chnl_net:caif_netlink_parms(): no params data found [ 89.337030][ T9416] bridge0: port 1(bridge_slave_0) entered blocking state [ 89.344738][ T9416] bridge0: port 1(bridge_slave_0) entered disabled state [ 89.352771][ T9416] device bridge_slave_0 entered promiscuous mode [ 89.361122][ T9416] bridge0: port 2(bridge_slave_1) entered blocking state [ 89.368230][ T9416] bridge0: port 2(bridge_slave_1) entered disabled state [ 89.376078][ T9416] device bridge_slave_1 entered promiscuous mode [ 89.393189][ T9416] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 89.403918][ T9416] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 89.423000][ T9416] team0: Port device team_slave_0 added [ 89.430189][ T9416] team0: Port device team_slave_1 added [ 89.444828][ T9416] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 89.451802][ T9416] 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. [ 89.477784][ T9416] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 89.489971][ T9416] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 89.496986][ T9416] 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. [ 89.522897][ T9416] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 89.592986][ T9416] device hsr_slave_0 entered promiscuous mode [ 89.630718][ T9416] device hsr_slave_1 entered promiscuous mode [ 89.741610][ T9416] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 89.783574][ T9416] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 89.852979][ T9416] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 89.903188][ T9416] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 89.954548][ T9416] bridge0: port 2(bridge_slave_1) entered blocking state [ 89.961737][ T9416] bridge0: port 2(bridge_slave_1) entered forwarding state [ 89.969350][ T9416] bridge0: port 1(bridge_slave_0) entered blocking state [ 89.976451][ T9416] bridge0: port 1(bridge_slave_0) entered forwarding state [ 90.017600][ T9416] 8021q: adding VLAN 0 to HW filter on device bond0 [ 90.029806][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 90.039316][ T2939] bridge0: port 1(bridge_slave_0) entered disabled state [ 90.047680][ T2939] bridge0: port 2(bridge_slave_1) entered disabled state [ 90.056756][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 90.069640][ T9416] 8021q: adding VLAN 0 to HW filter on device team0 [ 90.080246][ T2877] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 90.088836][ T2877] bridge0: port 1(bridge_slave_0) entered blocking state [ 90.095955][ T2877] bridge0: port 1(bridge_slave_0) entered forwarding state [ 90.107388][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 90.116669][ T2939] bridge0: port 2(bridge_slave_1) entered blocking state [ 90.123750][ T2939] bridge0: port 2(bridge_slave_1) entered forwarding state [ 90.144140][ T2877] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 90.153168][ T2877] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 90.169120][ T9416] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 90.180265][ T9416] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 90.192743][ T2877] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 90.201728][ T2877] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 90.210240][ T2877] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 90.218763][ T2877] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 90.239910][ T9416] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 90.249384][ T2734] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 90.256986][ T2734] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 90.274054][ T2877] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 90.292586][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 90.302352][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 90.309981][ T2939] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 90.320323][ T9416] device veth0_vlan entered promiscuous mode [ 90.332523][ T9416] device veth1_vlan entered promiscuous mode [ 90.352333][ T2877] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 90.362825][ T2877] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 90.373085][ T9416] device veth0_macvtap entered promiscuous mode [ 90.387757][ T9416] device veth1_macvtap entered promiscuous mode [ 90.404225][ T9416] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 90.412618][ T2877] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 90.421585][ T2877] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 90.429409][ T2877] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 90.438132][ T2877] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 90.449360][ T9416] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 90.464131][ T2941] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 90.473028][ T2941] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 90.682184][ T9423] ------------[ cut here ]------------ [ 90.687796][ T9423] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 90.696791][ T9423] WARNING: CPU: 0 PID: 9423 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 90.706244][ T9423] Kernel panic - not syncing: panic_on_warn set ... [ 90.712812][ T9423] CPU: 0 PID: 9423 Comm: syz-executor110 Not tainted 5.6.0-rc6-syzkaller #0 [ 90.721455][ T9423] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 90.731530][ T9423] Call Trace: [ 90.734815][ T9423] dump_stack+0x188/0x20d [ 90.739139][ T9423] ? debug_print_object+0xc0/0x250 [ 90.744238][ T9423] panic+0x2e3/0x75c [ 90.748112][ T9423] ? add_taint.cold+0x16/0x16 [ 90.752778][ T9423] ? __probe_kernel_read+0x188/0x1d0 [ 90.758047][ T9423] ? __warn.cold+0x14/0x35 [ 90.762486][ T9423] ? __warn+0xd5/0x1c8 [ 90.766601][ T9423] ? debug_print_object+0x160/0x250 [ 90.771784][ T9423] __warn.cold+0x2f/0x35 [ 90.776045][ T9423] ? debug_print_object+0x160/0x250 [ 90.781230][ T9423] report_bug+0x27b/0x2f0 [ 90.785557][ T9423] do_error_trap+0x12b/0x220 [ 90.790131][ T9423] ? debug_print_object+0x160/0x250 [ 90.795416][ T9423] do_invalid_op+0x32/0x40 [ 90.799965][ T9423] ? debug_print_object+0x160/0x250 [ 90.805162][ T9423] invalid_op+0x23/0x30 [ 90.809309][ T9423] RIP: 0010:debug_print_object+0x160/0x250 [ 90.815103][ T9423] Code: dd 00 f2 51 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd 00 f2 51 88 48 c7 c7 60 e7 51 88 e8 78 29 b1 fd <0f> 0b 83 05 cb f6 d2 06 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 90.834688][ T9423] RSP: 0018:ffffc90001f57168 EFLAGS: 00010286 [ 90.840739][ T9423] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 90.848695][ T9423] RDX: 0000000000000000 RSI: ffffffff815c06c1 RDI: fffff520003eae1f [ 90.856659][ T9423] RBP: 0000000000000001 R08: ffff8880a72b0540 R09: fffffbfff180e578 [ 90.864612][ T9423] R10: fffffbfff180e577 R11: ffffffff8c072bbf R12: ffffffff897acba0 [ 90.872563][ T9423] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920003eae3a [ 90.880533][ T9423] ? vprintk_func+0x81/0x17e [ 90.885249][ T9423] ? debug_print_object+0x160/0x250 [ 90.890435][ T9423] ? lockdep_hardirqs_on+0x417/0x5d0 [ 90.895722][ T9423] debug_object_activate+0x346/0x470 [ 90.901000][ T9423] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 90.906783][ T9423] ? debug_object_init_on_stack+0x20/0x20 [ 90.912481][ T9423] ? find_held_lock+0x2d/0x110 [ 90.917226][ T9423] ? free_object+0x70/0x70 [ 90.921618][ T9423] ? lock_downgrade+0x7f0/0x7f0 [ 90.926446][ T9423] ? delayed_work_timer_fn+0x90/0x90 [ 90.931716][ T9423] call_rcu+0x2c/0x690 [ 90.935765][ T9423] queue_rcu_work+0x82/0xa0 [ 90.940247][ T9423] route4_change+0x19e8/0x2250 [ 90.944995][ T9423] ? route4_destroy+0x800/0x800 [ 90.949836][ T9423] ? wait_for_completion+0x3c0/0x3c0 [ 90.955107][ T9423] tc_new_tfilter+0xa59/0x20b0 [ 90.959853][ T9423] ? route4_destroy+0x800/0x800 [ 90.964726][ T9423] ? tc_del_tfilter+0x1430/0x1430 [ 90.969733][ T9423] ? __lock_acquire+0x80b/0x3ca0 [ 90.974657][ T9423] ? apparmor_capable+0x454/0x8a0 [ 90.979704][ T9423] ? rcu_read_lock_held+0x9c/0xb0 [ 90.984714][ T9423] ? tc_del_tfilter+0x1430/0x1430 [ 90.989761][ T9423] rtnetlink_rcv_msg+0x810/0xad0 [ 90.994683][ T9423] ? rtnl_bridge_getlink+0x880/0x880 [ 90.999946][ T9423] ? netdev_core_pick_tx+0x2e0/0x2e0 [ 91.005208][ T9423] ? __copy_skb_header+0x280/0x5b0 [ 91.010296][ T9423] ? skb_splice_bits+0x1a0/0x1a0 [ 91.015214][ T9423] ? __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 91.020996][ T9423] ? kmem_cache_alloc+0x261/0x730 [ 91.026003][ T9423] netlink_rcv_skb+0x15a/0x410 [ 91.030749][ T9423] ? rtnl_bridge_getlink+0x880/0x880 [ 91.036010][ T9423] ? netlink_ack+0xa80/0xa80 [ 91.040613][ T9423] netlink_unicast+0x537/0x740 [ 91.045370][ T9423] ? netlink_attachskb+0x810/0x810 [ 91.050471][ T9423] ? _copy_from_iter_full+0x25c/0x870 [ 91.055820][ T9423] ? __phys_addr_symbol+0x2c/0x70 [ 91.060830][ T9423] ? __check_object_size+0x171/0x437 [ 91.066109][ T9423] netlink_sendmsg+0x882/0xe10 [ 91.070855][ T9423] ? aa_af_perm+0x260/0x260 [ 91.075334][ T9423] ? netlink_unicast+0x740/0x740 [ 91.080254][ T9423] ? netlink_unicast+0x740/0x740 [ 91.085282][ T9423] sock_sendmsg+0xcf/0x120 [ 91.089691][ T9423] ____sys_sendmsg+0x6b9/0x7d0 [ 91.094450][ T9423] ? kernel_sendmsg+0x50/0x50 [ 91.099139][ T9423] ___sys_sendmsg+0x100/0x170 [ 91.103856][ T9423] ? sendmsg_copy_msghdr+0x70/0x70 [ 91.108983][ T9423] ? __fget_files+0x329/0x4f0 [ 91.113658][ T9423] ? ksys_dup3+0x3c0/0x3c0 [ 91.118105][ T9423] ? mark_lock+0xbc/0x1220 [ 91.122504][ T9423] ? __lock_acquire+0x14bd/0x3ca0 [ 91.127519][ T9423] ? __fget_light+0x208/0x270 [ 91.132187][ T9423] __sys_sendmsg+0xec/0x1b0 [ 91.136673][ T9423] ? __sys_sendmsg_sock+0xb0/0xb0 [ 91.141675][ T9423] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 91.147635][ T9423] ? __ia32_sys_futex_time32+0x32a/0x494 [ 91.153256][ T9423] ? fpregs_mark_activate+0x320/0x320 [ 91.158608][ T9423] ? trace_hardirqs_off_caller+0x55/0x230 [ 91.164319][ T9423] ? do_fast_syscall_32+0xcc/0xe8f [ 91.169411][ T9423] do_fast_syscall_32+0x270/0xe8f [ 91.174418][ T9423] entry_SYSENTER_compat+0x70/0x7f [ 91.180823][ T9423] Kernel Offset: disabled [ 91.185171][ T9423] Rebooting in 86400 seconds..