[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 73.237255][ T27] audit: type=1800 audit(1584342380.034:25): pid=9112 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 73.257495][ T27] audit: type=1800 audit(1584342380.034:26): pid=9112 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 73.285884][ T27] audit: type=1800 audit(1584342380.044:27): pid=9112 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 '10.128.1.34' (ECDSA) to the list of known hosts. syzkaller login: [ 82.319056][ T9265] IPVS: ftp: loaded support on port[0] = 21 [ 82.366982][ T9265] chnl_net:caif_netlink_parms(): no params data found [ 82.403529][ T9265] bridge0: port 1(bridge_slave_0) entered blocking state [ 82.411118][ T9265] bridge0: port 1(bridge_slave_0) entered disabled state [ 82.419679][ T9265] device bridge_slave_0 entered promiscuous mode [ 82.427903][ T9265] bridge0: port 2(bridge_slave_1) entered blocking state [ 82.435163][ T9265] bridge0: port 2(bridge_slave_1) entered disabled state [ 82.442741][ T9265] device bridge_slave_1 entered promiscuous mode [ 82.459758][ T9265] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 82.470381][ T9265] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 82.490450][ T9265] team0: Port device team_slave_0 added [ 82.497829][ T9265] team0: Port device team_slave_1 added [ 82.512054][ T9265] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 82.519091][ T9265] 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. [ 82.545150][ T9265] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 82.557424][ T9265] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 82.564487][ T9265] 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. [ 82.590526][ T9265] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 82.656250][ T9265] device hsr_slave_0 entered promiscuous mode [ 82.704736][ T9265] device hsr_slave_1 entered promiscuous mode [ 82.835986][ T9265] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 82.887484][ T9265] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 82.957448][ T9265] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 83.027233][ T9265] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 83.079485][ T9265] bridge0: port 2(bridge_slave_1) entered blocking state [ 83.086712][ T9265] bridge0: port 2(bridge_slave_1) entered forwarding state [ 83.094423][ T9265] bridge0: port 1(bridge_slave_0) entered blocking state [ 83.101485][ T9265] bridge0: port 1(bridge_slave_0) entered forwarding state [ 83.144152][ T9265] 8021q: adding VLAN 0 to HW filter on device bond0 [ 83.162720][ T2866] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 83.174190][ T2866] bridge0: port 1(bridge_slave_0) entered disabled state [ 83.183514][ T2866] bridge0: port 2(bridge_slave_1) entered disabled state [ 83.192207][ T2866] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 83.205791][ T9265] 8021q: adding VLAN 0 to HW filter on device team0 [ 83.216776][ T2817] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 83.226164][ T2817] bridge0: port 1(bridge_slave_0) entered blocking state [ 83.233388][ T2817] bridge0: port 1(bridge_slave_0) entered forwarding state [ 83.256643][ T2866] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 83.265524][ T2866] bridge0: port 2(bridge_slave_1) entered blocking state [ 83.272557][ T2866] bridge0: port 2(bridge_slave_1) entered forwarding state [ 83.280763][ T2866] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 83.289565][ T2866] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 83.298554][ T2866] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 83.308990][ T2817] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 83.320722][ T2866] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 83.331313][ T9265] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 83.349524][ T2817] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 83.357416][ T2817] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 83.370595][ T9265] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 83.387589][ T2866] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 83.397285][ T2866] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 83.415217][ T2891] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 83.425667][ T2891] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 83.435402][ T9265] device veth0_vlan entered promiscuous mode [ 83.449350][ T9265] device veth1_vlan entered promiscuous mode [ 83.457628][ T2866] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 83.465842][ T2866] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 83.473537][ T2866] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 83.495694][ T2866] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 83.505299][ T2866] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 83.513703][ T2866] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 83.524107][ T9265] device veth0_macvtap entered promiscuous mode [ 83.534147][ T9265] device veth1_macvtap entered promiscuous mode [ 83.549810][ T9265] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 83.557413][ T2817] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 83.567064][ T2817] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 83.575131][ T2817] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 83.583616][ T2817] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 83.595333][ T9265] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 83.608207][ T2817] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 83.617698][ T2817] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program executing program [ 83.776459][ T9276] ------------[ cut here ]------------ [ 83.782009][ T9276] ODEBUG: activate active (active state 1) object type: rcu_head hint: 0x0 [ 83.791146][ T9276] WARNING: CPU: 1 PID: 9276 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 [ 83.800708][ T9276] Kernel panic - not syncing: panic_on_warn set ... [ 83.807278][ T9276] CPU: 1 PID: 9276 Comm: syz-executor469 Not tainted 5.6.0-rc5-syzkaller #0 [ 83.815927][ T9276] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.826183][ T9276] Call Trace: [ 83.829460][ T9276] dump_stack+0x188/0x20d [ 83.833770][ T9276] ? debug_print_object+0x120/0x250 [ 83.838957][ T9276] panic+0x2e3/0x75c [ 83.842832][ T9276] ? add_taint.cold+0x16/0x16 [ 83.847499][ T9276] ? __probe_kernel_read+0x188/0x1d0 [ 83.852775][ T9276] ? __warn.cold+0x14/0x35 [ 83.857226][ T9276] ? __warn+0xd5/0x1c8 [ 83.861277][ T9276] ? debug_print_object+0x160/0x250 [ 83.866467][ T9276] __warn.cold+0x2f/0x35 [ 83.870799][ T9276] ? debug_print_object+0x160/0x250 [ 83.875980][ T9276] report_bug+0x27b/0x2f0 [ 83.880303][ T9276] do_error_trap+0x12b/0x220 [ 83.884883][ T9276] ? debug_print_object+0x160/0x250 [ 83.890076][ T9276] do_invalid_op+0x32/0x40 [ 83.894480][ T9276] ? debug_print_object+0x160/0x250 [ 83.899676][ T9276] invalid_op+0x23/0x30 [ 83.903817][ T9276] RIP: 0010:debug_print_object+0x160/0x250 [ 83.909600][ T9276] Code: dd c0 f3 51 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd c0 f3 51 88 48 c7 c7 20 e9 51 88 e8 d8 cc b1 fd <0f> 0b 83 05 ab 9a d3 06 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89 [ 83.929199][ T9276] RSP: 0018:ffffc90002147168 EFLAGS: 00010286 [ 83.935253][ T9276] RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000 [ 83.943219][ T9276] RDX: 0000000000000000 RSI: ffffffff815c06c1 RDI: fffff52000428e1f [ 83.951180][ T9276] RBP: 0000000000000001 R08: ffff888090c1c480 R09: ffffed1015ce6659 [ 83.959138][ T9276] R10: ffffed1015ce6658 R11: ffff8880ae7332c7 R12: ffffffff897acba0 [ 83.967268][ T9276] R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000428e3a [ 83.975248][ T9276] ? vprintk_func+0x81/0x17e [ 83.979827][ T9276] ? debug_print_object+0x160/0x250 [ 83.985016][ T9276] ? lockdep_hardirqs_on+0x417/0x5d0 [ 83.990295][ T9276] debug_object_activate+0x346/0x470 [ 83.995565][ T9276] ? _raw_spin_unlock_irqrestore+0x9b/0xe0 [ 84.001355][ T9276] ? debug_object_init_on_stack+0x20/0x20 [ 84.007105][ T9276] ? find_held_lock+0x2d/0x110 [ 84.011854][ T9276] ? free_object+0x70/0x70 [ 84.016246][ T9276] ? lock_downgrade+0x7f0/0x7f0 [ 84.021077][ T9276] ? delayed_work_timer_fn+0x90/0x90 [ 84.026397][ T9276] call_rcu+0x2c/0x690 [ 84.030450][ T9276] queue_rcu_work+0x82/0xa0 [ 84.034944][ T9276] route4_change+0x19e8/0x2250 [ 84.039704][ T9276] ? route4_destroy+0x800/0x800 [ 84.044561][ T9276] ? wait_for_completion+0x3c0/0x3c0 [ 84.049843][ T9276] tc_new_tfilter+0xa59/0x20b0 [ 84.054611][ T9276] ? route4_destroy+0x800/0x800 [ 84.059491][ T9276] ? tc_del_tfilter+0x1430/0x1430 [ 84.064501][ T9276] ? __lock_acquire+0x80b/0x3ca0 [ 84.069425][ T9276] ? apparmor_capable+0x454/0x8a0 [ 84.074464][ T9276] ? rcu_read_lock_held+0x9c/0xb0 [ 84.079496][ T9276] ? tc_del_tfilter+0x1430/0x1430 [ 84.084506][ T9276] rtnetlink_rcv_msg+0x810/0xad0 [ 84.089426][ T9276] ? rtnl_bridge_getlink+0x880/0x880 [ 84.094713][ T9276] ? netdev_core_pick_tx+0x2e0/0x2e0 [ 84.100004][ T9276] ? __copy_skb_header+0x1e0/0x5b0 [ 84.105100][ T9276] ? skb_splice_bits+0x1a0/0x1a0 [ 84.110019][ T9276] ? __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 84.115806][ T9276] ? kmem_cache_alloc+0x261/0x730 [ 84.120814][ T9276] netlink_rcv_skb+0x15a/0x410 [ 84.125562][ T9276] ? rtnl_bridge_getlink+0x880/0x880 [ 84.130833][ T9276] ? netlink_ack+0xa80/0xa80 [ 84.135427][ T9276] netlink_unicast+0x537/0x740 [ 84.140174][ T9276] ? netlink_attachskb+0x810/0x810 [ 84.145301][ T9276] ? _copy_from_iter_full+0x25c/0x870 [ 84.150653][ T9276] ? __phys_addr_symbol+0x2c/0x70 [ 84.155669][ T9276] ? __check_object_size+0x171/0x437 [ 84.160950][ T9276] netlink_sendmsg+0x882/0xe10 [ 84.165701][ T9276] ? aa_af_perm+0x260/0x260 [ 84.170234][ T9276] ? netlink_unicast+0x740/0x740 [ 84.175177][ T9276] ? netlink_unicast+0x740/0x740 [ 84.180103][ T9276] sock_sendmsg+0xcf/0x120 [ 84.184500][ T9276] ____sys_sendmsg+0x6b9/0x7d0 [ 84.189244][ T9276] ? kernel_sendmsg+0x50/0x50 [ 84.193912][ T9276] ___sys_sendmsg+0x100/0x170 [ 84.198642][ T9276] ? sendmsg_copy_msghdr+0x70/0x70 [ 84.203745][ T9276] ? __fget_files+0x329/0x4f0 [ 84.208417][ T9276] ? ksys_dup3+0x3c0/0x3c0 [ 84.212855][ T9276] ? _copy_to_user+0x107/0x150 [ 84.217629][ T9276] ? __fget_light+0x208/0x270 [ 84.222306][ T9276] __sys_sendmsg+0xec/0x1b0 [ 84.226795][ T9276] ? __sys_sendmsg_sock+0xb0/0xb0 [ 84.231800][ T9276] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 84.237767][ T9276] ? __ia32_sys_futex_time32+0x32a/0x494 [ 84.243388][ T9276] ? fpregs_mark_activate+0x320/0x320 [ 84.248740][ T9276] ? trace_hardirqs_off_caller+0x55/0x230 [ 84.254452][ T9276] ? do_fast_syscall_32+0xcc/0xe8f [ 84.259555][ T9276] do_fast_syscall_32+0x270/0xe8f [ 84.264591][ T9276] entry_SYSENTER_compat+0x70/0x7f [ 84.271088][ T9276] Kernel Offset: disabled [ 84.275474][ T9276] Rebooting in 86400 seconds..