[ 68.893160][ T23] audit: type=1800 audit(1568261139.736:27): pid=9918 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 68.934733][ T23] audit: type=1800 audit(1568261139.736:28): pid=9918 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 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. [ 69.520356][ T23] audit: type=1800 audit(1568261140.436:29): pid=9918 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 69.543113][ T23] audit: type=1800 audit(1568261140.436:30): pid=9918 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.249' (ECDSA) to the list of known hosts. syzkaller login: [ 196.264228][T10070] IPVS: ftp: loaded support on port[0] = 21 [ 196.313634][T10070] chnl_net:caif_netlink_parms(): no params data found [ 196.337352][T10070] bridge0: port 1(bridge_slave_0) entered blocking state [ 196.344943][T10070] bridge0: port 1(bridge_slave_0) entered disabled state [ 196.352835][T10070] device bridge_slave_0 entered promiscuous mode [ 196.360343][T10070] bridge0: port 2(bridge_slave_1) entered blocking state [ 196.367627][T10070] bridge0: port 2(bridge_slave_1) entered disabled state [ 196.375564][T10070] device bridge_slave_1 entered promiscuous mode [ 196.389378][T10070] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 196.399766][T10070] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 196.415478][T10070] team0: Port device team_slave_0 added [ 196.422024][T10070] team0: Port device team_slave_1 added [ 196.477025][T10070] device hsr_slave_0 entered promiscuous mode [ 196.555393][T10070] device hsr_slave_1 entered promiscuous mode [ 196.621314][T10070] bridge0: port 2(bridge_slave_1) entered blocking state [ 196.628584][T10070] bridge0: port 2(bridge_slave_1) entered forwarding state [ 196.635921][T10070] bridge0: port 1(bridge_slave_0) entered blocking state [ 196.643063][T10070] bridge0: port 1(bridge_slave_0) entered forwarding state [ 196.667552][T10070] 8021q: adding VLAN 0 to HW filter on device bond0 [ 196.678498][T10072] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 196.697409][T10072] bridge0: port 1(bridge_slave_0) entered disabled state [ 196.705842][T10072] bridge0: port 2(bridge_slave_1) entered disabled state [ 196.713540][T10072] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 196.724215][T10070] 8021q: adding VLAN 0 to HW filter on device team0 [ 196.733628][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 196.742412][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 196.749755][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 196.765772][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 196.774249][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 196.781621][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 196.789772][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 196.799937][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 196.808065][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready executing program [ 196.818604][ T3011] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 196.829886][T10072] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 196.839161][T10070] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 196.854775][T10070] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 301.885029][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 301.891690][ C0] rcu: 0-...!: (10499 ticks this GP) idle=03e/1/0x4000000000000002 softirq=8916/8916 fqs=8 [ 301.901819][ C0] (t=10501 jiffies g=9733 q=92) [ 301.906741][ C0] rcu: rcu_preempt kthread starved for 10486 jiffies! g9733 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 301.917819][ C0] rcu: RCU grace-period kthread stack dump: [ 301.923703][ C0] rcu_preempt R running task 29520 10 2 0x80004000 [ 301.931831][ C0] Call Trace: [ 301.937828][ C0] __schedule+0x755/0x1580 [ 301.942266][ C0] ? __sched_text_start+0x8/0x8 [ 301.947109][ C0] schedule+0xd9/0x260 [ 301.951171][ C0] schedule_timeout+0x486/0xc50 [ 301.956011][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 301.960949][ C0] ? usleep_range+0x170/0x170 [ 301.965625][ C0] ? trace_hardirqs_on+0x67/0x240 [ 301.970636][ C0] ? __kasan_check_read+0x11/0x20 [ 301.975763][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 301.981296][ C0] ? swake_up_one+0x60/0x60 [ 301.985791][ C0] rcu_gp_kthread+0x9b2/0x18c0 [ 301.990544][ C0] ? rcu_barrier+0x310/0x310 [ 301.995117][ C0] ? trace_hardirqs_on+0x67/0x240 [ 302.000221][ C0] ? __kasan_check_read+0x11/0x20 [ 302.005253][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 302.011488][ C0] ? __kthread_parkme+0x108/0x1c0 [ 302.016512][ C0] ? __kasan_check_read+0x11/0x20 [ 302.021527][ C0] kthread+0x361/0x430 [ 302.025586][ C0] ? rcu_barrier+0x310/0x310 [ 302.030161][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 302.036691][ C0] ret_from_fork+0x24/0x30 [ 302.041111][ C0] NMI backtrace for cpu 0 [ 302.045432][ C0] CPU: 0 PID: 3011 Comm: kworker/0:2 Not tainted 5.3.0-rc8+ #0 [ 302.052957][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 302.063185][ C0] Workqueue: ipv6_addrconf addrconf_dad_work [ 302.069164][ C0] Call Trace: [ 302.072434][ C0] [ 302.075299][ C0] dump_stack+0x172/0x1f0 [ 302.079620][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 302.084807][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 302.091041][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 302.096678][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 302.102656][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 302.108537][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 302.113641][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 302.119198][ C0] ? raise_softirq+0x138/0x340 [ 302.123965][ C0] update_process_times+0x32/0x80 [ 302.128983][ C0] tick_sched_handle+0xa2/0x190 [ 302.133820][ C0] tick_sched_timer+0x53/0x140 [ 302.138572][ C0] __hrtimer_run_queues+0x364/0xe40 [ 302.143777][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 302.149051][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 302.154584][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 302.160376][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 302.166434][ C0] hrtimer_interrupt+0x314/0x770 [ 302.171426][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 302.177005][ C0] apic_timer_interrupt+0xf/0x20 [ 302.182014][ C0] RIP: 0010:hhf_dequeue+0x697/0xa20 [ 302.187224][ C0] Code: 31 ff 89 c6 88 45 b0 e8 37 15 ac fb 0f b6 75 b0 40 84 f6 0f 84 c6 f9 ff ff e8 e5 13 ac fb 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 <0f> 85 08 03 00 00 48 89 d8 49 89 9d 98 03 00 00 48 c1 e8 03 42 80 [ 302.207167][ C0] RSP: 0018:ffff8880ae808b48 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 302.215582][ C0] RAX: 1ffff11012048b43 RBX: ffff888090245978 RCX: ffffffff85c660f9 [ 302.223542][ C0] RDX: 0000000000000100 RSI: ffffffff85c6610b RDI: 0000000000000001 [ 302.231500][ C0] RBP: ffff8880ae808b98 R08: ffff88809f974640 R09: 0000000000000000 [ 302.239458][ C0] R10: fffffbfff134afaf R11: ffff88809f974640 R12: dffffc0000000000 [ 302.247501][ C0] R13: ffff888090245680 R14: ffff888090245a18 R15: ffff888090245a10 [ 302.255483][ C0] ? apic_timer_interrupt+0xa/0x20 [ 302.260587][ C0] ? hhf_dequeue+0x679/0xa20 [ 302.265177][ C0] ? hhf_dequeue+0x68b/0xa20 [ 302.269755][ C0] ? hhf_dequeue+0x68b/0xa20 [ 302.274413][ C0] __qdisc_run+0x1e7/0x19d0 [ 302.278929][ C0] ? dev_queue_xmit+0x18/0x20 [ 302.283598][ C0] __dev_queue_xmit+0x16f1/0x3650 [ 302.288624][ C0] ? process_backlog+0x206/0x750 [ 302.293568][ C0] ? net_rx_action+0x4d6/0x1030 [ 302.298439][ C0] ? __do_softirq+0x262/0x98c [ 302.303137][ C0] ? do_softirq_own_stack+0x2a/0x40 [ 302.308329][ C0] ? do_softirq.part.0+0x11a/0x170 [ 302.313578][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 302.318872][ C0] ? quarantine_put+0x11c/0x1c0 [ 302.323717][ C0] ? trace_hardirqs_on+0x67/0x240 [ 302.328837][ C0] ? __skb_ext_put+0xd9/0x210 [ 302.333518][ C0] dev_queue_xmit+0x18/0x20 [ 302.338116][ C0] ? dev_queue_xmit+0x18/0x20 [ 302.342807][ C0] br_dev_queue_push_xmit+0x3f3/0x5c0 [ 302.348169][ C0] ? __skb_ext_del+0xb0/0x2c0 [ 302.352849][ C0] ? lock_downgrade+0x920/0x920 [ 302.357742][ C0] br_nf_dev_queue_xmit+0x34e/0x1470 [ 302.363029][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 302.368736][ C0] br_nf_post_routing+0x1502/0x1d30 [ 302.373921][ C0] ? br_nf_dev_queue_xmit+0x1470/0x1470 [ 302.379460][ C0] ? mark_held_locks+0xf0/0xf0 [ 302.384228][ C0] ? nf_bridge_update_protocol+0x1d0/0x1d0 [ 302.390208][ C0] ? __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 302.396072][ C0] nf_hook_slow+0xbc/0x1e0 [ 302.400483][ C0] br_forward_finish+0x215/0x400 [ 302.405495][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 302.411035][ C0] ? process_one_work+0x9af/0x1740 [ 302.416128][ C0] ? worker_thread+0x98/0xe40 [ 302.420792][ C0] ? kthread+0x361/0x430 [ 302.425024][ C0] ? br_fdb_add.cold+0x8c/0x8c [ 302.429831][ C0] ? ip_vs_out+0x244/0x1700 [ 302.434418][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 302.440130][ C0] ? nf_hook_slow+0xf0/0x1e0 [ 302.444723][ C0] ? should_fail+0x1de/0x852 [ 302.449310][ C0] br_nf_hook_thresh+0x2e9/0x370 [ 302.454257][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 302.459791][ C0] ? setup_pre_routing+0x4b0/0x4b0 [ 302.464888][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 302.470421][ C0] ? br_nf_forward_finish+0x176/0xa90 [ 302.476082][ C0] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 302.481975][ C0] br_nf_forward_finish+0x66c/0xa90 [ 302.487187][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 302.492787][ C0] br_nf_forward_ip+0xc74/0x21e0 [ 302.497761][ C0] ? br_nf_forward_arp+0x1670/0x1670 [ 302.503041][ C0] ? mark_held_locks+0xf0/0xf0 [ 302.508590][ C0] ? br_nf_hook_thresh+0x370/0x370 [ 302.513744][ C0] ? __vlan_flush+0x120/0x120 [ 302.518519][ C0] nf_hook_slow+0xbc/0x1e0 [ 302.522924][ C0] __br_forward+0x393/0xb00 [ 302.527423][ C0] ? br_forward_finish+0x400/0x400 [ 302.532605][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 302.538140][ C0] deliver_clone+0x61/0xc0 [ 302.542542][ C0] br_flood+0x325/0x3d0 [ 302.546690][ C0] br_handle_frame_finish+0xb46/0x1670 [ 302.552134][ C0] ? br_handle_local_finish+0x20/0x20 [ 302.557519][ C0] ? __local_bh_enable_ip+0x15a/0x270 [ 302.562877][ C0] ? audit_alloc_mark+0x430/0x500 [ 302.567906][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 302.573697][ C0] ? nf_hook_slow+0xf0/0x1e0 [ 302.578273][ C0] br_nf_hook_thresh+0x2e9/0x370 [ 302.583196][ C0] ? br_handle_local_finish+0x20/0x20 [ 302.588552][ C0] ? setup_pre_routing+0x4b0/0x4b0 [ 302.593651][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 302.599875][ C0] ? br_handle_local_finish+0x20/0x20 [ 302.605233][ C0] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 302.611112][ C0] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 302.616994][ C0] br_nf_pre_routing_finish_ipv6+0x6fb/0xd80 [ 302.622962][ C0] ? br_handle_local_finish+0x20/0x20 [ 302.628342][ C0] br_nf_pre_routing_ipv6+0x456/0x832 [ 302.633698][ C0] ? br_validate_ipv6+0xb80/0xb80 [ 302.638737][ C0] ? br_nf_pre_routing_finish.cold+0x124/0x124 [ 302.644875][ C0] ? br_nf_pre_routing+0x246/0x2355 [ 302.650075][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 302.656309][ C0] ? skb_pull_rcsum+0x155/0x300 [ 302.661147][ C0] br_nf_pre_routing+0x1743/0x2355 [ 302.666245][ C0] ? br_nf_pre_routing_finish+0x1730/0x1730 [ 302.672228][ C0] ? br_nf_pre_routing_finish+0x1730/0x1730 [ 302.678107][ C0] br_handle_frame+0x806/0x133e [ 302.682946][ C0] ? br_handle_frame_finish+0x1670/0x1670 [ 302.688652][ C0] ? br_handle_local_finish+0x20/0x20 [ 302.694016][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 302.700240][ C0] ? br_handle_frame_finish+0x1670/0x1670 [ 302.706045][ C0] __netif_receive_skb_core+0xfc1/0x3060 [ 302.711668][ C0] ? find_next_and_bit+0x19a/0x200 [ 302.716769][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 302.723032][ C0] ? do_xdp_generic+0x50/0x50 [ 302.727714][ C0] ? load_balance+0x375/0x2680 [ 302.732481][ C0] __netif_receive_skb_one_core+0xa8/0x1a0 [ 302.738449][ C0] ? __netif_receive_skb_one_core+0xa8/0x1a0 [ 302.744418][ C0] ? __kasan_check_write+0x14/0x20 [ 302.749520][ C0] ? __netif_receive_skb_core+0x3060/0x3060 [ 302.755412][ C0] ? lock_acquire+0x190/0x410 [ 302.760091][ C0] ? process_backlog+0x195/0x750 [ 302.765021][ C0] __netif_receive_skb+0x2c/0x1d0 [ 302.770038][ C0] process_backlog+0x206/0x750 [ 302.774789][ C0] ? rebalance_domains+0x2c6/0xba0 [ 302.779897][ C0] net_rx_action+0x4d6/0x1030 [ 302.784563][ C0] ? napi_complete_done+0x4b0/0x4b0 [ 302.789777][ C0] ? sched_clock+0x2e/0x50 [ 302.794198][ C0] ? ip6_finish_output2+0x106d/0x2520 [ 302.799567][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 302.805814][ C0] __do_softirq+0x262/0x98c [ 302.810404][ C0] ? ip6_finish_output2+0x106d/0x2520 [ 302.815770][ C0] do_softirq_own_stack+0x2a/0x40 [ 302.820784][ C0] [ 302.823726][ C0] do_softirq.part.0+0x11a/0x170 [ 302.828660][ C0] __local_bh_enable_ip+0x211/0x270 [ 302.833854][ C0] ip6_finish_output2+0x10a0/0x2520 [ 302.839055][ C0] ? ip6_forward_finish+0x530/0x530 [ 302.844250][ C0] ? lock_downgrade+0x920/0x920 [ 302.849115][ C0] ? ip6_mtu+0x16f/0x460 [ 302.853359][ C0] __ip6_finish_output+0x444/0xa50 [ 302.858471][ C0] ? __ip6_finish_output+0x444/0xa50 [ 302.863748][ C0] ip6_finish_output+0x38/0x1f0 [ 302.868601][ C0] ip6_output+0x235/0x7c0 [ 302.872919][ C0] ? ip6_finish_output+0x1f0/0x1f0 [ 302.878898][ C0] ? __ip6_finish_output+0xa50/0xa50 [ 302.884235][ C0] ? ndisc_send_skb+0x803/0x1450 [ 302.889164][ C0] ndisc_send_skb+0xf29/0x1450 [ 302.893926][ C0] ? nf_hook.constprop.0+0x560/0x560 [ 302.899206][ C0] ? skb_set_owner_w+0x21b/0x320 [ 302.904151][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 302.909963][ C0] ndisc_send_ns+0x3a9/0x850 [ 302.914549][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 302.920787][ C0] ? ndisc_netdev_event+0x4e0/0x4e0 [ 302.926065][ C0] ? addrconf_dad_work+0xac4/0x1150 [ 302.931249][ C0] ? trace_hardirqs_on+0x67/0x240 [ 302.936260][ C0] ? addrconf_dad_work+0xac4/0x1150 [ 302.941444][ C0] addrconf_dad_work+0xb88/0x1150 [ 302.946457][ C0] ? addrconf_dad_completed+0xbb0/0xbb0 [ 302.951993][ C0] ? lock_acquire+0x190/0x410 [ 302.956662][ C0] ? trace_hardirqs_on+0x67/0x240 [ 302.961678][ C0] process_one_work+0x9af/0x1740 [ 302.966605][ C0] ? pwq_dec_nr_in_flight+0x320/0x320 [ 302.971980][ C0] ? lock_acquire+0x190/0x410 [ 302.976652][ C0] worker_thread+0x98/0xe40 [ 302.981161][ C0] ? trace_hardirqs_on+0x67/0x240 [ 302.986359][ C0] kthread+0x361/0x430 [ 302.990415][ C0] ? process_one_work+0x1740/0x1740 [ 302.995600][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 303.001858][ C0] ret_from_fork+0x24/0x30