[ 64.228255][ T26] audit: type=1800 audit(1568422149.775:27): pid=9755 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 64.253865][ T26] audit: type=1800 audit(1568422149.775:28): pid=9755 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. [ 64.762743][ T26] audit: type=1800 audit(1568422150.395:29): pid=9755 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 [ 64.784324][ T26] audit: type=1800 audit(1568422150.395:30): pid=9755 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 '10.128.0.88' (ECDSA) to the list of known hosts. syzkaller login: [ 86.761931][ T9907] IPVS: ftp: loaded support on port[0] = 21 [ 86.814345][ T9907] chnl_net:caif_netlink_parms(): no params data found [ 86.835172][ T9907] bridge0: port 1(bridge_slave_0) entered blocking state [ 86.842722][ T9907] bridge0: port 1(bridge_slave_0) entered disabled state [ 86.850342][ T9907] device bridge_slave_0 entered promiscuous mode [ 86.857547][ T9907] bridge0: port 2(bridge_slave_1) entered blocking state [ 86.864695][ T9907] bridge0: port 2(bridge_slave_1) entered disabled state [ 86.872262][ T9907] device bridge_slave_1 entered promiscuous mode [ 86.886331][ T9907] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 86.896724][ T9907] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 86.912801][ T9907] team0: Port device team_slave_0 added [ 86.919506][ T9907] team0: Port device team_slave_1 added [ 86.969354][ T9907] device hsr_slave_0 entered promiscuous mode [ 87.037959][ T9907] device hsr_slave_1 entered promiscuous mode [ 87.122587][ T9907] bridge0: port 2(bridge_slave_1) entered blocking state [ 87.129907][ T9907] bridge0: port 2(bridge_slave_1) entered forwarding state [ 87.137450][ T9907] bridge0: port 1(bridge_slave_0) entered blocking state [ 87.144791][ T9907] bridge0: port 1(bridge_slave_0) entered forwarding state [ 87.168818][ T9907] 8021q: adding VLAN 0 to HW filter on device bond0 [ 87.180107][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 87.188455][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 87.196001][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 87.203868][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 87.213651][ T9907] 8021q: adding VLAN 0 to HW filter on device team0 [ 87.222740][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 87.231072][ T5] bridge0: port 1(bridge_slave_0) entered blocking state [ 87.238140][ T5] bridge0: port 1(bridge_slave_0) entered forwarding state [ 87.248051][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 87.256804][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 87.263947][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 87.278033][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 87.287054][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 87.296849][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 87.308320][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 87.318942][ T3025] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready executing program [ 87.329182][ T9907] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 87.344339][ T9907] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 192.397618][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 192.404287][ C1] rcu: 1-...!: (1 GPs behind) idle=bc2/1/0x4000000000000002 softirq=9715/9716 fqs=3 [ 192.413817][ C1] (t=10501 jiffies g=9073 q=64) [ 192.418735][ C1] rcu: rcu_preempt kthread starved for 10495 jiffies! g9073 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 [ 192.429982][ C1] rcu: RCU grace-period kthread stack dump: [ 192.435927][ C1] rcu_preempt I29520 10 2 0x80004000 [ 192.442249][ C1] Call Trace: [ 192.445558][ C1] __schedule+0x755/0x1580 [ 192.449963][ C1] ? __sched_text_start+0x8/0x8 [ 192.455236][ C1] schedule+0xd9/0x260 [ 192.459290][ C1] schedule_timeout+0x486/0xc50 [ 192.464120][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 192.469058][ C1] ? usleep_range+0x170/0x170 [ 192.473747][ C1] ? trace_hardirqs_on+0x67/0x240 [ 192.478771][ C1] ? __kasan_check_read+0x11/0x20 [ 192.483785][ C1] ? __next_timer_interrupt+0x1a0/0x1a0 [ 192.489320][ C1] ? swake_up_one+0x60/0x60 [ 192.493829][ C1] rcu_gp_kthread+0x9b2/0x18c0 [ 192.498602][ C1] ? rcu_barrier+0x310/0x310 [ 192.503172][ C1] ? trace_hardirqs_on+0x67/0x240 [ 192.508176][ C1] ? __kasan_check_read+0x11/0x20 [ 192.513362][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 192.519719][ C1] ? __kthread_parkme+0x108/0x1c0 [ 192.524841][ C1] ? __kasan_check_read+0x11/0x20 [ 192.529858][ C1] kthread+0x361/0x430 [ 192.533935][ C1] ? rcu_barrier+0x310/0x310 [ 192.538684][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 192.544921][ C1] ret_from_fork+0x24/0x30 [ 192.549377][ C1] NMI backtrace for cpu 1 [ 192.553706][ C1] CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.3.0-rc8+ #0 [ 192.561080][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 192.571154][ C1] Workqueue: ipv6_addrconf addrconf_dad_work [ 192.577133][ C1] Call Trace: [ 192.580410][ C1] [ 192.583250][ C1] dump_stack+0x172/0x1f0 [ 192.587562][ C1] nmi_cpu_backtrace.cold+0x70/0xb2 [ 192.592756][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 192.599164][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 192.604778][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 192.610747][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 192.616713][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 192.621822][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 192.627452][ C1] ? raise_softirq+0x138/0x340 [ 192.632199][ C1] update_process_times+0x32/0x80 [ 192.637336][ C1] tick_sched_handle+0xa2/0x190 [ 192.642166][ C1] tick_sched_timer+0x53/0x140 [ 192.646912][ C1] __hrtimer_run_queues+0x364/0xe40 [ 192.652098][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 192.657364][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 192.662893][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 192.668593][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 192.674643][ C1] hrtimer_interrupt+0x314/0x770 [ 192.679569][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 192.685101][ C1] apic_timer_interrupt+0xf/0x20 [ 192.690201][ C1] [ 192.693138][ C1] RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x5/0x20 [ 192.699895][ C1] Code: 00 00 00 00 00 55 48 89 f2 48 89 fe bf 06 00 00 00 48 89 e5 48 8b 4d 08 e8 18 ff ff ff 5d c3 66 0f 1f 44 00 00 55 40 0f b6 d6 <40> 0f b6 f7 bf 01 00 00 00 48 89 e5 48 8b 4d 08 e8 f6 fe ff ff 5d [ 192.719489][ C1] RSP: 0018:ffff8880a99173e8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 192.727887][ C1] RAX: 0000000000000001 RBX: ffff8880911d1df8 RCX: ffffffff85c67051 [ 192.735845][ C1] RDX: 0000000000000001 RSI: 0000000000000001 RDI: 0000000000000000 [ 192.743797][ C1] RBP: ffff8880a9917448 R08: ffff8880a9906480 R09: 0000000000000000 [ 192.751744][ C1] R10: fffffbfff134afaf R11: ffff8880a9906480 R12: dffffc0000000000 [ 192.759700][ C1] R13: ffff8880911d1b00 R14: ffff8880911d1e98 R15: ffff8880911d1e90 [ 192.767667][ C1] ? hhf_dequeue+0x5d1/0xa20 [ 192.772239][ C1] ? hhf_dequeue+0x679/0xa20 [ 192.776911][ C1] __qdisc_run+0x1e7/0x19d0 [ 192.781673][ C1] ? dev_queue_xmit+0x18/0x20 [ 192.786339][ C1] __dev_queue_xmit+0x16f1/0x3650 [ 192.791353][ C1] ? ndisc_constructor+0x1a5/0xb40 [ 192.796447][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 192.801710][ C1] ? ip6_finish_output2+0x1034/0x2520 [ 192.807063][ C1] ? __kasan_check_read+0x11/0x20 [ 192.812089][ C1] ? lock_downgrade+0x920/0x920 [ 192.816923][ C1] dev_queue_xmit+0x18/0x20 [ 192.821405][ C1] ? dev_queue_xmit+0x18/0x20 [ 192.826077][ C1] neigh_resolve_output+0x5a5/0x970 [ 192.831259][ C1] ip6_finish_output2+0x1034/0x2520 [ 192.836452][ C1] ? ip6_forward_finish+0x530/0x530 [ 192.841648][ C1] ? lock_downgrade+0x920/0x920 [ 192.846480][ C1] ? ip6_mtu+0x16f/0x460 [ 192.850724][ C1] __ip6_finish_output+0x444/0xa50 [ 192.855831][ C1] ? __ip6_finish_output+0x444/0xa50 [ 192.861109][ C1] ip6_finish_output+0x38/0x1f0 [ 192.865955][ C1] ip6_output+0x235/0x7c0 [ 192.870300][ C1] ? ip6_finish_output+0x1f0/0x1f0 [ 192.875428][ C1] ? __ip6_finish_output+0xa50/0xa50 [ 192.880699][ C1] ? ndisc_send_skb+0x803/0x1450 [ 192.885630][ C1] ndisc_send_skb+0xf29/0x1450 [ 192.890375][ C1] ? nf_hook.constprop.0+0x560/0x560 [ 192.895656][ C1] ? skb_set_owner_w+0x21b/0x320 [ 192.900587][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 192.906289][ C1] ndisc_send_ns+0x3a9/0x850 [ 192.910861][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 192.917094][ C1] ? ndisc_netdev_event+0x4e0/0x4e0 [ 192.922285][ C1] ? addrconf_dad_work+0xac4/0x1150 [ 192.927461][ C1] ? trace_hardirqs_on+0x67/0x240 [ 192.932638][ C1] ? addrconf_dad_work+0xac4/0x1150 [ 192.937909][ C1] addrconf_dad_work+0xb88/0x1150 [ 192.942930][ C1] ? addrconf_dad_completed+0xbb0/0xbb0 [ 192.948456][ C1] ? lock_acquire+0x190/0x410 [ 192.953112][ C1] ? trace_hardirqs_on+0x67/0x240 [ 192.958115][ C1] process_one_work+0x9af/0x1740 [ 192.963045][ C1] ? pwq_dec_nr_in_flight+0x320/0x320 [ 192.968420][ C1] ? lock_acquire+0x190/0x410 [ 192.973602][ C1] worker_thread+0x98/0xe40 [ 192.978097][ C1] kthread+0x361/0x430 [ 192.982142][ C1] ? process_one_work+0x1740/0x1740 [ 192.987338][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 192.993558][ C1] ret_from_fork+0x24/0x30