[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 52.054357][ T26] audit: type=1800 audit(1568431832.742:25): pid=8394 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 52.097791][ T26] audit: type=1800 audit(1568431832.752:26): pid=8394 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 52.139703][ T26] audit: type=1800 audit(1568431832.752:27): pid=8394 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 '10.128.10.36' (ECDSA) to the list of known hosts. syzkaller login: [ 377.316543][ T8549] IPVS: ftp: loaded support on port[0] = 21 [ 377.376559][ T8549] chnl_net:caif_netlink_parms(): no params data found [ 377.404312][ T8549] bridge0: port 1(bridge_slave_0) entered blocking state [ 377.411806][ T8549] bridge0: port 1(bridge_slave_0) entered disabled state [ 377.419573][ T8549] device bridge_slave_0 entered promiscuous mode [ 377.427372][ T8549] bridge0: port 2(bridge_slave_1) entered blocking state [ 377.434590][ T8549] bridge0: port 2(bridge_slave_1) entered disabled state [ 377.442247][ T8549] device bridge_slave_1 entered promiscuous mode [ 377.458095][ T8549] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 377.468528][ T8549] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 377.487041][ T8549] team0: Port device team_slave_0 added [ 377.494446][ T8549] team0: Port device team_slave_1 added [ 377.579553][ T8549] device hsr_slave_0 entered promiscuous mode [ 377.648296][ T8549] device hsr_slave_1 entered promiscuous mode [ 377.706020][ T8549] bridge0: port 2(bridge_slave_1) entered blocking state [ 377.713219][ T8549] bridge0: port 2(bridge_slave_1) entered forwarding state [ 377.721048][ T8549] bridge0: port 1(bridge_slave_0) entered blocking state [ 377.728184][ T8549] bridge0: port 1(bridge_slave_0) entered forwarding state [ 377.760440][ T8549] 8021q: adding VLAN 0 to HW filter on device bond0 [ 377.772194][ T3516] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 377.781938][ T3516] bridge0: port 1(bridge_slave_0) entered disabled state [ 377.790057][ T3516] bridge0: port 2(bridge_slave_1) entered disabled state [ 377.798044][ T3516] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 377.809681][ T8549] 8021q: adding VLAN 0 to HW filter on device team0 [ 377.819615][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 377.828191][ T3014] bridge0: port 1(bridge_slave_0) entered blocking state [ 377.835249][ T3014] bridge0: port 1(bridge_slave_0) entered forwarding state [ 377.857404][ T8549] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 377.867909][ T8549] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 377.881177][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 377.889800][ T5] bridge0: port 2(bridge_slave_1) entered blocking state [ 377.896822][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state [ 377.904851][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 377.915641][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 377.923982][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 377.932279][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 377.946503][ T8553] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 377.954049][ T8553] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready executing program [ 377.965471][ T8549] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 483.197598][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 483.204382][ C0] rcu: 0-....: (1 GPs behind) idle=d1e/1/0x4000000000000002 softirq=9009/9010 fqs=5246 [ 483.214281][ C0] (t=10500 jiffies g=6917 q=66) [ 483.219192][ C0] NMI backtrace for cpu 0 [ 483.223495][ C0] CPU: 0 PID: 8553 Comm: kworker/0:1 Not tainted 5.3.0-rc7+ #0 [ 483.231042][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 483.241115][ C0] Workqueue: ipv6_addrconf addrconf_dad_work [ 483.247066][ C0] Call Trace: [ 483.250336][ C0] [ 483.253190][ C0] dump_stack+0x172/0x1f0 [ 483.257516][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 483.262690][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 483.268906][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 483.274514][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 483.280474][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 483.286344][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 483.291428][ C0] ? find_next_bit+0x107/0x130 [ 483.296172][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 483.301702][ C0] ? raise_softirq+0x138/0x340 [ 483.306443][ C0] update_process_times+0x32/0x80 [ 483.311464][ C0] tick_sched_handle+0xa2/0x190 [ 483.316290][ C0] tick_sched_timer+0x53/0x140 [ 483.321031][ C0] __hrtimer_run_queues+0x364/0xe40 [ 483.326203][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 483.331475][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 483.337008][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 483.342703][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 483.348747][ C0] hrtimer_interrupt+0x314/0x770 [ 483.353716][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 483.359250][ C0] apic_timer_interrupt+0xf/0x20 [ 483.364162][ C0] RIP: 0010:__list_del_entry_valid+0xc7/0xf5 [ 483.370205][ C0] Code: b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 24 49 8b 55 08 4c 39 f2 0f 85 aa 00 00 00 41 5c b8 01 00 00 00 <41> 5d 41 5e 5d c3 e8 de 51 6e fe e9 55 ff ff ff e8 d4 51 6e fe eb [ 483.389794][ C0] RSP: 0018:ffff8880ae808b28 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 483.398178][ C0] RAX: 0000000000000001 RBX: ffff8880a198f4f8 RCX: ffffffff85c7dbb9 [ 483.406124][ C0] RDX: ffff8880a198f4f8 RSI: ffffffff85c7e086 RDI: ffff8880a198f598 [ 483.414073][ C0] RBP: ffff8880ae808b38 R08: ffff888092dcc600 R09: fffffbfff14e9755 [ 483.422028][ C0] R10: ffff888092dccff8 R11: ffff888092dcc600 R12: dffffc0000000000 [ 483.429981][ C0] R13: ffff8880a198f590 R14: ffff8880a198f4f8 R15: 0000000000000000 [ 483.437933][ C0] ? apic_timer_interrupt+0xa/0x20 [ 483.443066][ C0] ? hhf_dequeue+0xb9/0xa20 [ 483.447540][ C0] ? hhf_dequeue+0x586/0xa20 [ 483.452108][ C0] hhf_dequeue+0x5c5/0xa20 [ 483.456540][ C0] __qdisc_run+0x1e7/0x19d0 [ 483.461039][ C0] ? dev_queue_xmit+0x18/0x20 [ 483.465706][ C0] __dev_queue_xmit+0x16f1/0x3650 [ 483.470713][ C0] ? process_backlog+0x206/0x750 [ 483.475623][ C0] ? net_rx_action+0x4d6/0x1080 [ 483.480456][ C0] ? __do_softirq+0x262/0x98c [ 483.485113][ C0] ? do_softirq_own_stack+0x2a/0x40 [ 483.490284][ C0] ? do_softirq.part.0+0x11a/0x170 [ 483.495373][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 483.500663][ C0] ? __skb_ext_put+0xd9/0x210 [ 483.505318][ C0] dev_queue_xmit+0x18/0x20 [ 483.509798][ C0] ? dev_queue_xmit+0x18/0x20 [ 483.514481][ C0] br_dev_queue_push_xmit+0x3f3/0x5c0 [ 483.519828][ C0] ? __skb_ext_del+0xb0/0x2c0 [ 483.524478][ C0] ? lock_downgrade+0x920/0x920 [ 483.529342][ C0] br_nf_dev_queue_xmit+0x34e/0x1470 [ 483.534606][ C0] br_nf_post_routing+0x1502/0x1d30 [ 483.539782][ C0] ? br_nf_dev_queue_xmit+0x1470/0x1470 [ 483.545305][ C0] ? mark_held_locks+0xf0/0xf0 [ 483.550045][ C0] ? nf_bridge_update_protocol+0x1d0/0x1d0 [ 483.555824][ C0] ? __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 483.561635][ C0] nf_hook_slow+0xbc/0x1e0 [ 483.566028][ C0] br_forward_finish+0x215/0x400 [ 483.570940][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 483.576469][ C0] ? br_fdb_add.cold+0x8c/0x8c [ 483.581225][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 483.586918][ C0] ? nf_hook_slow+0xf0/0x1e0 [ 483.591486][ C0] br_nf_hook_thresh+0x2e9/0x370 [ 483.596416][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 483.601940][ C0] ? setup_pre_routing+0x4b0/0x4b0 [ 483.607029][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 483.612550][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 483.618767][ C0] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 483.624811][ C0] br_nf_forward_finish+0x66c/0xa90 [ 483.629984][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 483.635509][ C0] br_nf_forward_ip+0xc74/0x21e0 [ 483.640467][ C0] ? br_nf_forward_arp+0x1670/0x1670 [ 483.645731][ C0] ? mark_held_locks+0xf0/0xf0 [ 483.650475][ C0] ? br_nf_hook_thresh+0x370/0x370 [ 483.655560][ C0] ? __vlan_flush+0x120/0x120 [ 483.660238][ C0] nf_hook_slow+0xbc/0x1e0 [ 483.664679][ C0] __br_forward+0x393/0xb00 [ 483.669164][ C0] ? br_forward_finish+0x400/0x400 [ 483.674273][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 483.679798][ C0] deliver_clone+0x61/0xc0 [ 483.684199][ C0] br_flood+0x325/0x3d0 [ 483.688390][ C0] br_handle_frame_finish+0xb46/0x1670 [ 483.693866][ C0] ? br_handle_local_finish+0x20/0x20 [ 483.699222][ C0] ? audit_alloc_mark+0x3d0/0x500 [ 483.704262][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 483.709958][ C0] ? nf_hook_slow+0xf0/0x1e0 [ 483.714529][ C0] br_nf_hook_thresh+0x2e9/0x370 [ 483.719458][ C0] ? br_handle_local_finish+0x20/0x20 [ 483.724822][ C0] ? setup_pre_routing+0x4b0/0x4b0 [ 483.729913][ C0] ? find_held_lock+0x35/0x130 [ 483.734653][ C0] ? br_handle_local_finish+0x20/0x20 [ 483.740054][ C0] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 483.746049][ C0] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 483.751926][ C0] br_nf_pre_routing_finish_ipv6+0x6fb/0xd80 [ 483.757882][ C0] ? br_handle_local_finish+0x20/0x20 [ 483.763238][ C0] ? __kasan_check_read+0x11/0x20 [ 483.768242][ C0] br_nf_pre_routing_ipv6+0x456/0x832 [ 483.773595][ C0] ? br_validate_ipv6+0xb80/0xb80 [ 483.778597][ C0] ? br_nf_pre_routing_finish.cold+0x124/0x124 [ 483.784724][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 483.790944][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 483.797165][ C0] ? skb_pull_rcsum+0x155/0x300 [ 483.802003][ C0] br_nf_pre_routing+0x1743/0x2355 [ 483.807095][ C0] ? br_nf_pre_routing_finish+0x1730/0x1730 [ 483.812969][ C0] ? br_nf_pre_routing_finish+0x1730/0x1730 [ 483.818839][ C0] br_handle_frame+0x806/0x133e [ 483.823671][ C0] ? br_handle_frame_finish+0x1670/0x1670 [ 483.829363][ C0] ? kfree_skb+0x10e/0x3c0 [ 483.833767][ C0] ? br_handle_local_finish+0x20/0x20 [ 483.839115][ C0] ? br_handle_frame_finish+0x1670/0x1670 [ 483.844809][ C0] __netif_receive_skb_core+0xfc1/0x3060 [ 483.850422][ C0] ? __kasan_check_read+0x11/0x20 [ 483.855425][ C0] ? do_xdp_generic+0x50/0x50 [ 483.860078][ C0] ? __kasan_check_read+0x11/0x20 [ 483.865074][ C0] ? __lock_acquire+0x8a2/0x4c30 [ 483.869985][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 483.875430][ C0] __netif_receive_skb_one_core+0xa8/0x1a0 [ 483.881217][ C0] ? __netif_receive_skb_one_core+0xa8/0x1a0 [ 483.887183][ C0] ? __netif_receive_skb_core+0x3060/0x3060 [ 483.893051][ C0] ? lock_acquire+0x190/0x410 [ 483.897709][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 483.903926][ C0] __netif_receive_skb+0x2c/0x1d0 [ 483.908926][ C0] process_backlog+0x206/0x750 [ 483.913661][ C0] ? net_rx_action+0x249/0x1080 [ 483.918491][ C0] ? lockdep_hardirqs_on+0x19e/0x5d0 [ 483.923761][ C0] net_rx_action+0x4d6/0x1080 [ 483.928422][ C0] ? napi_busy_loop+0x970/0x970 [ 483.933266][ C0] __do_softirq+0x262/0x98c [ 483.937752][ C0] ? ip6_finish_output2+0x106d/0x2520 [ 483.943113][ C0] do_softirq_own_stack+0x2a/0x40 [ 483.948112][ C0] [ 483.951030][ C0] do_softirq.part.0+0x11a/0x170 [ 483.955941][ C0] __local_bh_enable_ip+0x211/0x270 [ 483.961115][ C0] ip6_finish_output2+0x10a0/0x2520 [ 483.966292][ C0] ? ip6_forward_finish+0x530/0x530 [ 483.971467][ C0] ? lock_downgrade+0x920/0x920 [ 483.976323][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 483.982557][ C0] ? __kasan_check_read+0x11/0x20 [ 483.987563][ C0] __ip6_finish_output+0x444/0xa50 [ 483.992684][ C0] ? __ip6_finish_output+0x444/0xa50 [ 483.997977][ C0] ip6_finish_output+0x38/0x1f0 [ 484.002808][ C0] ip6_output+0x235/0x7c0 [ 484.007115][ C0] ? ip6_finish_output+0x1f0/0x1f0 [ 484.012204][ C0] ? __ip6_finish_output+0xa50/0xa50 [ 484.017538][ C0] ndisc_send_skb+0xf29/0x1450 [ 484.022286][ C0] ? nf_hook.constprop.0+0x560/0x560 [ 484.027550][ C0] ? skb_set_owner_w+0x21b/0x320 [ 484.032484][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 484.038181][ C0] ndisc_send_ns+0x3a9/0x850 [ 484.042747][ C0] ? mark_held_locks+0xa4/0xf0 [ 484.047490][ C0] ? ndisc_netdev_event+0x4e0/0x4e0 [ 484.052658][ C0] ? lockdep_hardirqs_on+0x418/0x5d0 [ 484.057917][ C0] ? addrconf_dad_work+0xac4/0x1150 [ 484.063089][ C0] ? trace_hardirqs_on+0x67/0x240 [ 484.068087][ C0] ? addrconf_dad_work+0xac4/0x1150 [ 484.073262][ C0] addrconf_dad_work+0xb88/0x1150 [ 484.078275][ C0] ? addrconf_dad_completed+0xbb0/0xbb0 [ 484.083809][ C0] process_one_work+0x9af/0x1740 [ 484.088728][ C0] ? pwq_dec_nr_in_flight+0x320/0x320 [ 484.094082][ C0] ? lock_acquire+0x190/0x410 [ 484.098740][ C0] worker_thread+0x98/0xe40 [ 484.103217][ C0] ? trace_hardirqs_on+0x67/0x240 [ 484.108239][ C0] kthread+0x361/0x430 [ 484.112283][ C0] ? process_one_work+0x1740/0x1740 [ 484.117453][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 484.123672][ C0] ret_from_fork+0x24/0x30