[ 65.767535][ T26] audit: type=1800 audit(1568266149.406:27): pid=9805 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 65.789273][ T26] audit: type=1800 audit(1568266149.426:28): pid=9805 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. [ 66.437427][ T26] audit: type=1800 audit(1568266150.166:29): pid=9805 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 [ 66.458814][ T26] audit: type=1800 audit(1568266150.166:30): pid=9805 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: [ 248.767749][ T9959] IPVS: ftp: loaded support on port[0] = 21 [ 248.814905][ T9959] chnl_net:caif_netlink_parms(): no params data found [ 248.839167][ T9959] bridge0: port 1(bridge_slave_0) entered blocking state [ 248.846389][ T9959] bridge0: port 1(bridge_slave_0) entered disabled state [ 248.854077][ T9959] device bridge_slave_0 entered promiscuous mode [ 248.861730][ T9959] bridge0: port 2(bridge_slave_1) entered blocking state [ 248.868939][ T9959] bridge0: port 2(bridge_slave_1) entered disabled state [ 248.876719][ T9959] device bridge_slave_1 entered promiscuous mode [ 248.891020][ T9959] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 248.901703][ T9959] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 248.918925][ T9959] team0: Port device team_slave_0 added [ 248.925436][ T9959] team0: Port device team_slave_1 added [ 248.997742][ T9959] device hsr_slave_0 entered promiscuous mode [ 249.056456][ T9959] device hsr_slave_1 entered promiscuous mode [ 249.131324][ T9959] bridge0: port 2(bridge_slave_1) entered blocking state [ 249.138546][ T9959] bridge0: port 2(bridge_slave_1) entered forwarding state [ 249.145876][ T9959] bridge0: port 1(bridge_slave_0) entered blocking state [ 249.152989][ T9959] bridge0: port 1(bridge_slave_0) entered forwarding state [ 249.178296][ T9959] 8021q: adding VLAN 0 to HW filter on device bond0 [ 249.190005][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 249.208592][ T17] bridge0: port 1(bridge_slave_0) entered disabled state [ 249.226880][ T17] bridge0: port 2(bridge_slave_1) entered disabled state [ 249.234504][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 249.244634][ T9959] 8021q: adding VLAN 0 to HW filter on device team0 [ 249.253747][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 249.262199][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 249.269307][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 249.286942][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 249.295257][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 249.302343][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 249.310338][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 249.318757][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 249.327223][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready executing program executing program executing program executing program executing program executing program executing program executing program [ 249.335736][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 249.344795][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 249.354691][ T9959] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 249.369228][ T9959] 8021q: adding VLAN 0 to HW filter on device batadv0 executing program executing program executing program executing program [ 354.425987][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 354.432653][ C1] rcu: 1-...!: (10500 ticks this GP) idle=57a/1/0x4000000000000002 softirq=9288/9288 fqs=0 [ 354.442773][ C1] (t=10500 jiffies g=9841 q=146) [ 354.447777][ C1] rcu: rcu_preempt kthread starved for 10500 jiffies! g9841 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 354.459022][ C1] rcu: RCU grace-period kthread stack dump: [ 354.464890][ C1] rcu_preempt I29040 10 2 0x80004000 [ 354.471325][ C1] Call Trace: [ 354.474762][ C1] __schedule+0x755/0x1580 [ 354.479214][ C1] ? __sched_text_start+0x8/0x8 [ 354.484054][ C1] schedule+0xd9/0x260 [ 354.488123][ C1] schedule_timeout+0x486/0xc50 [ 354.493064][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 354.498012][ C1] ? usleep_range+0x170/0x170 [ 354.502703][ C1] ? trace_hardirqs_on+0x67/0x240 [ 354.507768][ C1] ? __kasan_check_read+0x11/0x20 [ 354.512816][ C1] ? __next_timer_interrupt+0x1a0/0x1a0 [ 354.518368][ C1] ? swake_up_one+0x60/0x60 [ 354.522848][ C1] ? trace_hardirqs_on+0x67/0x240 [ 354.527876][ C1] rcu_gp_kthread+0x9b2/0x18c0 [ 354.532620][ C1] ? rcu_barrier+0x310/0x310 [ 354.537193][ C1] ? trace_hardirqs_on+0x67/0x240 [ 354.542197][ C1] ? __kasan_check_read+0x11/0x20 [ 354.547236][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 354.553476][ C1] ? __kthread_parkme+0x108/0x1c0 [ 354.558505][ C1] ? __kasan_check_read+0x11/0x20 [ 354.563508][ C1] kthread+0x361/0x430 [ 354.567557][ C1] ? rcu_barrier+0x310/0x310 [ 354.572611][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 354.578842][ C1] ret_from_fork+0x24/0x30 [ 354.583288][ C1] NMI backtrace for cpu 1 [ 354.587609][ C1] CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.3.0-rc8+ #0 [ 354.594957][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 354.605147][ C1] Workqueue: ipv6_addrconf addrconf_dad_work [ 354.611207][ C1] Call Trace: [ 354.614476][ C1] [ 354.617375][ C1] dump_stack+0x172/0x1f0 [ 354.621688][ C1] nmi_cpu_backtrace.cold+0x70/0xb2 [ 354.626880][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 354.633199][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 354.639805][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 354.645778][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 354.651691][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 354.656792][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 354.662393][ C1] ? raise_softirq+0x138/0x340 [ 354.667142][ C1] update_process_times+0x32/0x80 [ 354.672175][ C1] tick_sched_handle+0xa2/0x190 [ 354.677011][ C1] tick_sched_timer+0x53/0x140 [ 354.681761][ C1] __hrtimer_run_queues+0x364/0xe40 [ 354.686966][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 354.692773][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 354.698305][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 354.704007][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 354.710068][ C1] hrtimer_interrupt+0x314/0x770 [ 354.715061][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 354.720597][ C1] apic_timer_interrupt+0xf/0x20 [ 354.725509][ C1] [ 354.728478][ C1] RIP: 0010:hhf_dequeue+0x615/0xa20 [ 354.733662][ C1] Code: 00 00 48 8d 7b 08 4c 8b 3b 48 89 fa 48 c1 ea 03 42 80 3c 22 00 0f 85 d0 03 00 00 49 8d 7f 08 4c 8b 73 08 48 89 fa 48 c1 ea 03 <42> 80 3c 22 00 0f 85 ac 03 00 00 4c 89 f2 4d 89 77 08 48 c1 ea 03 [ 354.753246][ C1] RSP: 0018:ffff8880a9916d58 EFLAGS: 00000a06 ORIG_RAX: ffffffffffffff13 [ 354.761637][ C1] RAX: 1ffff11014470867 RBX: ffff8880a2384338 RCX: ffffffff85c66051 [ 354.771092][ C1] RDX: 1ffff1101447087b RSI: ffffffff85c6605b RDI: ffff8880a23843d8 [ 354.779645][ C1] RBP: ffff8880a9916da8 R08: ffff8880a9906480 R09: 0000000000000000 [ 354.787594][ C1] R10: fffffbfff134afaf R11: ffff8880a9906480 R12: dffffc0000000000 [ 354.795545][ C1] R13: ffff8880a2384040 R14: ffff8880a23843d0 R15: ffff8880a23843d0 [ 354.803503][ C1] ? hhf_dequeue+0x5d1/0xa20 [ 354.808069][ C1] ? hhf_dequeue+0x5db/0xa20 [ 354.812645][ C1] ? hhf_dequeue+0x5db/0xa20 [ 354.817282][ C1] __qdisc_run+0x1e7/0x19d0 [ 354.821806][ C1] ? dev_queue_xmit+0x18/0x20 [ 354.826475][ C1] __dev_queue_xmit+0x16f1/0x3650 [ 354.832172][ C1] ? __local_bh_enable_ip+0x15a/0x270 [ 354.837522][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 354.842786][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 354.849050][ C1] ? br_nf_post_routing+0xd73/0x1d30 [ 354.854336][ C1] ? br_forward_finish+0x235/0x400 [ 354.859426][ C1] ? __kasan_check_read+0x11/0x20 [ 354.864427][ C1] ? __dev_queue_xmit+0x2b15/0x3650 [ 354.869600][ C1] dev_queue_xmit+0x18/0x20 [ 354.874079][ C1] ? dev_queue_xmit+0x18/0x20 [ 354.878729][ C1] br_dev_queue_push_xmit+0x3f3/0x5c0 [ 354.884132][ C1] ? nf_hook_slow+0xf0/0x1e0 [ 354.888700][ C1] br_forward_finish+0xfa/0x400 [ 354.893533][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 354.899056][ C1] ? br_fdb_add.cold+0x8c/0x8c [ 354.903798][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 354.909492][ C1] ? nf_hook_slow+0xf0/0x1e0 [ 354.914064][ C1] __br_forward+0x641/0xb00 [ 354.918727][ C1] ? br_forward_finish+0x400/0x400 [ 354.923822][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 354.929361][ C1] deliver_clone+0x61/0xc0 [ 354.933755][ C1] maybe_deliver+0x2c7/0x390 [ 354.939634][ C1] br_flood+0x13a/0x3d0 [ 354.943819][ C1] br_dev_xmit+0x98c/0x15a0 [ 354.948305][ C1] ? br_poll_controller+0x10/0x10 [ 354.954616][ C1] ? netif_skb_features+0x6c2/0xb90 [ 354.959825][ C1] ? netdev_set_sb_channel+0xe0/0xe0 [ 354.965098][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 354.971337][ C1] ? validate_xmit_xfrm+0x43c/0xf10 [ 354.976521][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 354.981433][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 354.987651][ C1] dev_hard_start_xmit+0x1a3/0x9c0 [ 354.992740][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 354.998959][ C1] __dev_queue_xmit+0x2b15/0x3650 [ 355.004006][ C1] ? ndisc_constructor+0x1a5/0xb40 [ 355.009239][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 355.014513][ C1] ? ip6_finish_output2+0x1034/0x2520 [ 355.019862][ C1] ? __kasan_check_read+0x11/0x20 [ 355.024984][ C1] ? lock_downgrade+0x920/0x920 [ 355.029812][ C1] dev_queue_xmit+0x18/0x20 [ 355.034314][ C1] ? dev_queue_xmit+0x18/0x20 [ 355.038999][ C1] neigh_resolve_output+0x5a5/0x970 [ 355.044177][ C1] ip6_finish_output2+0x1034/0x2520 [ 355.049601][ C1] ? ip6_forward_finish+0x530/0x530 [ 355.054821][ C1] ? lock_downgrade+0x920/0x920 [ 355.059652][ C1] ? ip6_mtu+0x16f/0x460 [ 355.063875][ C1] __ip6_finish_output+0x444/0xa50 [ 355.068974][ C1] ? __ip6_finish_output+0x444/0xa50 [ 355.075538][ C1] ip6_finish_output+0x38/0x1f0 [ 355.080365][ C1] ip6_output+0x235/0x7c0 [ 355.084676][ C1] ? ip6_finish_output+0x1f0/0x1f0 [ 355.089765][ C1] ? __ip6_finish_output+0xa50/0xa50 [ 355.095027][ C1] ? ndisc_send_skb+0x803/0x1450 [ 355.099958][ C1] ndisc_send_skb+0xf29/0x1450 [ 355.105488][ C1] ? nf_hook.constprop.0+0x560/0x560 [ 355.110827][ C1] ? skb_set_owner_w+0x21b/0x320 [ 355.115747][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 355.121970][ C1] ndisc_send_ns+0x3a9/0x850 [ 355.126544][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 355.134587][ C1] ? ndisc_netdev_event+0x4e0/0x4e0 [ 355.139766][ C1] ? addrconf_dad_work+0xac4/0x1150 [ 355.144943][ C1] ? trace_hardirqs_on+0x67/0x240 [ 355.149946][ C1] ? addrconf_dad_work+0xac4/0x1150 [ 355.155134][ C1] addrconf_dad_work+0xb88/0x1150 [ 355.160509][ C1] ? addrconf_dad_completed+0xbb0/0xbb0 [ 355.166032][ C1] ? lock_acquire+0x190/0x410 [ 355.170688][ C1] ? trace_hardirqs_on+0x67/0x240 [ 355.175760][ C1] process_one_work+0x9af/0x1740 [ 355.180683][ C1] ? pwq_dec_nr_in_flight+0x320/0x320 [ 355.186046][ C1] ? lock_acquire+0x190/0x410 [ 355.191228][ C1] worker_thread+0x98/0xe40 [ 355.195723][ C1] kthread+0x361/0x430 [ 355.200030][ C1] ? process_one_work+0x1740/0x1740 [ 355.205207][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 355.211603][ C1] ret_from_fork+0x24/0x30