[ 66.726296][ T26] audit: type=1800 audit(1568427560.613:27): 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 [ 66.749853][ T26] audit: type=1800 audit(1568427560.613:28): 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. [ 67.357622][ T26] audit: type=1800 audit(1568427561.313:29): 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 [ 67.381091][ T26] audit: type=1800 audit(1568427561.313:30): 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 '10.128.10.5' (ECDSA) to the list of known hosts. syzkaller login: [ 280.056872][ T9909] IPVS: ftp: loaded support on port[0] = 21 [ 280.106810][ T9909] chnl_net:caif_netlink_parms(): no params data found [ 280.128549][ T9909] bridge0: port 1(bridge_slave_0) entered blocking state [ 280.136055][ T9909] bridge0: port 1(bridge_slave_0) entered disabled state [ 280.143915][ T9909] device bridge_slave_0 entered promiscuous mode [ 280.151500][ T9909] bridge0: port 2(bridge_slave_1) entered blocking state [ 280.158569][ T9909] bridge0: port 2(bridge_slave_1) entered disabled state [ 280.166299][ T9909] device bridge_slave_1 entered promiscuous mode [ 280.180279][ T9909] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 280.190687][ T9909] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 280.206483][ T9909] team0: Port device team_slave_0 added [ 280.213369][ T9909] team0: Port device team_slave_1 added [ 280.260895][ T9909] device hsr_slave_0 entered promiscuous mode [ 280.329398][ T9909] device hsr_slave_1 entered promiscuous mode [ 280.404627][ T9909] bridge0: port 2(bridge_slave_1) entered blocking state [ 280.411730][ T9909] bridge0: port 2(bridge_slave_1) entered forwarding state [ 280.419120][ T9909] bridge0: port 1(bridge_slave_0) entered blocking state [ 280.426696][ T9909] bridge0: port 1(bridge_slave_0) entered forwarding state [ 280.451982][ T9909] 8021q: adding VLAN 0 to HW filter on device bond0 [ 280.462095][ T3024] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 280.481332][ T3024] bridge0: port 1(bridge_slave_0) entered disabled state [ 280.488777][ T3024] bridge0: port 2(bridge_slave_1) entered disabled state [ 280.496840][ T3024] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 280.507289][ T9909] 8021q: adding VLAN 0 to HW filter on device team0 [ 280.517140][ T3516] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 280.525613][ T3516] bridge0: port 1(bridge_slave_0) entered blocking state [ 280.532701][ T3516] bridge0: port 1(bridge_slave_0) entered forwarding state [ 280.550072][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 280.558380][ T5] bridge0: port 2(bridge_slave_1) entered blocking state [ 280.565573][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state [ 280.573682][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 280.583043][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 280.594330][ T3024] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready executing program [ 280.602383][ T3024] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 280.613010][ T3516] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 280.623144][ T9909] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 280.637282][ T9909] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 385.798980][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 385.805651][ C0] rcu: 0-...!: (1 GPs behind) idle=db2/1/0x4000000000000002 softirq=10021/10022 fqs=1 [ 385.815541][ C0] (t=10501 jiffies g=9653 q=32) [ 385.820462][ C0] rcu: rcu_preempt kthread starved for 10500 jiffies! g9653 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 385.832331][ C0] rcu: RCU grace-period kthread stack dump: [ 385.838216][ C0] rcu_preempt I29656 10 2 0x80004000 [ 385.844539][ C0] Call Trace: [ 385.848006][ C0] __schedule+0x755/0x1580 [ 385.852418][ C0] ? __sched_text_start+0x8/0x8 [ 385.857253][ C0] schedule+0xd9/0x260 [ 385.861411][ C0] schedule_timeout+0x486/0xc50 [ 385.866249][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 385.871451][ C0] ? usleep_range+0x170/0x170 [ 385.876108][ C0] ? trace_hardirqs_on+0x67/0x240 [ 385.881113][ C0] ? __kasan_check_read+0x11/0x20 [ 385.886136][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 385.891662][ C0] ? swake_up_one+0x60/0x60 [ 385.896153][ C0] rcu_gp_kthread+0x9b2/0x18c0 [ 385.900916][ C0] ? rcu_barrier+0x310/0x310 [ 385.905483][ C0] ? trace_hardirqs_on+0x67/0x240 [ 385.910578][ C0] ? __kasan_check_read+0x11/0x20 [ 385.915595][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 385.921816][ C0] ? __kthread_parkme+0x108/0x1c0 [ 385.926817][ C0] ? __kasan_check_read+0x11/0x20 [ 385.931823][ C0] kthread+0x361/0x430 [ 385.935873][ C0] ? rcu_barrier+0x310/0x310 [ 385.940440][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 385.946665][ C0] ret_from_fork+0x24/0x30 [ 385.951089][ C0] NMI backtrace for cpu 0 [ 385.955405][ C0] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.3.0-rc8+ #0 [ 385.962748][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 385.972894][ C0] Workqueue: ipv6_addrconf addrconf_dad_work [ 385.978851][ C0] Call Trace: [ 385.982116][ C0] [ 385.985004][ C0] dump_stack+0x172/0x1f0 [ 385.989319][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 385.994515][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 386.000740][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 386.006353][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 386.012317][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 386.018198][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 386.023294][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 386.028823][ C0] ? raise_softirq+0x138/0x340 [ 386.033566][ C0] update_process_times+0x32/0x80 [ 386.038585][ C0] tick_sched_handle+0xa2/0x190 [ 386.043414][ C0] tick_sched_timer+0x53/0x140 [ 386.048157][ C0] __hrtimer_run_queues+0x364/0xe40 [ 386.053334][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 386.058602][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 386.064133][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 386.069845][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 386.075895][ C0] hrtimer_interrupt+0x314/0x770 [ 386.081047][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 386.086574][ C0] apic_timer_interrupt+0xf/0x20 [ 386.091484][ C0] [ 386.094449][ C0] RIP: 0010:hhf_dequeue+0x5db/0xa20 [ 386.099644][ C0] Code: b5 14 03 00 00 48 89 df 45 01 fe 44 89 73 10 e8 bb cc 77 fd 31 ff 41 89 c6 89 c6 e8 ef 05 ac fb 45 84 f6 74 63 e8 a5 04 ac fb <48> 89 d8 48 c1 e8 03 42 80 3c 20 00 0f 85 f3 03 00 00 48 8d 7b 08 [ 386.119227][ C0] RSP: 0018:ffff8880a98d6d58 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 [ 386.127620][ C0] RAX: ffff8880a98c2300 RBX: ffff88809ac58778 RCX: ffffffff85c67051 [ 386.135583][ C0] RDX: 0000000000000000 RSI: ffffffff85c6705b RDI: 0000000000000001 [ 386.143545][ C0] RBP: ffff8880a98d6da8 R08: ffff8880a98c2300 R09: 0000000000000000 [ 386.152231][ C0] R10: fffffbfff134afaf R11: ffff8880a98c2300 R12: dffffc0000000000 [ 386.160450][ C0] R13: ffff88809ac58480 R14: 0000000000000001 R15: 0000000000000000 [ 386.168439][ C0] ? hhf_dequeue+0x5d1/0xa20 [ 386.173025][ C0] ? hhf_dequeue+0x5db/0xa20 [ 386.177600][ C0] ? hhf_dequeue+0x5db/0xa20 [ 386.184112][ C0] __qdisc_run+0x1e7/0x19d0 [ 386.188712][ C0] ? dev_queue_xmit+0x18/0x20 [ 386.193371][ C0] __dev_queue_xmit+0x16f1/0x3650 [ 386.198379][ C0] ? __local_bh_enable_ip+0x15a/0x270 [ 386.203731][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 386.209004][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 386.215268][ C0] ? br_nf_post_routing+0xd73/0x1d30 [ 386.221404][ C0] ? br_forward_finish+0x235/0x400 [ 386.226549][ C0] ? __kasan_check_read+0x11/0x20 [ 386.231573][ C0] ? __dev_queue_xmit+0x2b15/0x3650 [ 386.236772][ C0] dev_queue_xmit+0x18/0x20 [ 386.241348][ C0] ? dev_queue_xmit+0x18/0x20 [ 386.246150][ C0] br_dev_queue_push_xmit+0x3f3/0x5c0 [ 386.251585][ C0] ? nf_hook_slow+0xf0/0x1e0 [ 386.256158][ C0] br_forward_finish+0xfa/0x400 [ 386.260985][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 386.266519][ C0] ? br_fdb_add.cold+0x8c/0x8c [ 386.271288][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 386.277211][ C0] ? nf_hook_slow+0xf0/0x1e0 [ 386.281795][ C0] __br_forward+0x641/0xb00 [ 386.286296][ C0] ? br_forward_finish+0x400/0x400 [ 386.291392][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 386.297008][ C0] deliver_clone+0x61/0xc0 [ 386.301405][ C0] maybe_deliver+0x2c7/0x390 [ 386.305981][ C0] br_flood+0x13a/0x3d0 [ 386.310185][ C0] br_dev_xmit+0x98c/0x15a0 [ 386.314685][ C0] ? br_poll_controller+0x10/0x10 [ 386.319779][ C0] ? netif_skb_features+0x6c2/0xb90 [ 386.325665][ C0] ? netdev_set_sb_channel+0xe0/0xe0 [ 386.331188][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 386.337457][ C0] ? validate_xmit_xfrm+0x43c/0xf10 [ 386.342660][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 386.347582][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 386.353808][ C0] dev_hard_start_xmit+0x1a3/0x9c0 [ 386.358921][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 386.365780][ C0] __dev_queue_xmit+0x2b15/0x3650 [ 386.370874][ C0] ? ndisc_constructor+0x1a5/0xb40 [ 386.375992][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 386.381264][ C0] ? ip6_finish_output2+0x1034/0x2520 [ 386.387058][ C0] ? __kasan_check_read+0x11/0x20 [ 386.392113][ C0] ? lock_downgrade+0x920/0x920 [ 386.398467][ C0] dev_queue_xmit+0x18/0x20 [ 386.403393][ C0] ? dev_queue_xmit+0x18/0x20 [ 386.408297][ C0] neigh_resolve_output+0x5a5/0x970 [ 386.413529][ C0] ip6_finish_output2+0x1034/0x2520 [ 386.418988][ C0] ? ip6_mtu+0x2e6/0x460 [ 386.423786][ C0] ? ip6_forward_finish+0x530/0x530 [ 386.430156][ C0] ? lock_downgrade+0x920/0x920 [ 386.435627][ C0] ? ip6_mtu+0x16f/0x460 [ 386.440410][ C0] __ip6_finish_output+0x444/0xa50 [ 386.445719][ C0] ? __ip6_finish_output+0x444/0xa50 [ 386.450995][ C0] ip6_finish_output+0x38/0x1f0 [ 386.456098][ C0] ip6_output+0x235/0x7c0 [ 386.460594][ C0] ? ip6_finish_output+0x1f0/0x1f0 [ 386.466642][ C0] ? __ip6_finish_output+0xa50/0xa50 [ 386.471920][ C0] ? ndisc_send_skb+0x803/0x1450 [ 386.476867][ C0] ndisc_send_skb+0xf29/0x1450 [ 386.481618][ C0] ? nf_hook.constprop.0+0x560/0x560 [ 386.486946][ C0] ? skb_set_owner_w+0x21b/0x320 [ 386.491894][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 386.497591][ C0] ndisc_send_ns+0x3a9/0x850 [ 386.502317][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 386.508635][ C0] ? ndisc_netdev_event+0x4e0/0x4e0 [ 386.513822][ C0] ? addrconf_dad_work+0xac4/0x1150 [ 386.519002][ C0] ? trace_hardirqs_on+0x67/0x240 [ 386.524093][ C0] ? addrconf_dad_work+0xac4/0x1150 [ 386.529277][ C0] addrconf_dad_work+0xb88/0x1150 [ 386.534303][ C0] ? addrconf_dad_completed+0xbb0/0xbb0 [ 386.540096][ C0] ? lock_acquire+0x190/0x410 [ 386.544753][ C0] ? trace_hardirqs_on+0x67/0x240 [ 386.549760][ C0] process_one_work+0x9af/0x1740 [ 386.554683][ C0] ? pwq_dec_nr_in_flight+0x320/0x320 [ 386.560033][ C0] ? lock_acquire+0x190/0x410 [ 386.564693][ C0] worker_thread+0x98/0xe40 [ 386.569192][ C0] ? trace_hardirqs_on+0x67/0x240 [ 386.574209][ C0] kthread+0x361/0x430 [ 386.578265][ C0] ? process_one_work+0x1740/0x1740 [ 386.583446][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 386.589670][ C0] ret_from_fork+0x24/0x30