[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 59.295137][ T26] audit: type=1800 audit(1568533414.863:25): pid=8481 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 59.339623][ T26] audit: type=1800 audit(1568533414.863:26): pid=8481 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 59.389303][ T26] audit: type=1800 audit(1568533414.863:27): pid=8481 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 '10.128.0.6' (ECDSA) to the list of known hosts. syzkaller login: [ 133.592381][ T8635] IPVS: ftp: loaded support on port[0] = 21 [ 133.645821][ T8635] chnl_net:caif_netlink_parms(): no params data found [ 133.672447][ T8635] bridge0: port 1(bridge_slave_0) entered blocking state [ 133.679881][ T8635] bridge0: port 1(bridge_slave_0) entered disabled state [ 133.687507][ T8635] device bridge_slave_0 entered promiscuous mode [ 133.695568][ T8635] bridge0: port 2(bridge_slave_1) entered blocking state [ 133.702839][ T8635] bridge0: port 2(bridge_slave_1) entered disabled state [ 133.710469][ T8635] device bridge_slave_1 entered promiscuous mode [ 133.727414][ T8635] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 133.738172][ T8635] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 133.757065][ T8635] team0: Port device team_slave_0 added [ 133.765195][ T8635] team0: Port device team_slave_1 added [ 133.822015][ T8635] device hsr_slave_0 entered promiscuous mode [ 133.889937][ T8635] device hsr_slave_1 entered promiscuous mode [ 133.947888][ T8635] bridge0: port 2(bridge_slave_1) entered blocking state [ 133.955077][ T8635] bridge0: port 2(bridge_slave_1) entered forwarding state [ 133.962959][ T8635] bridge0: port 1(bridge_slave_0) entered blocking state [ 133.970045][ T8635] bridge0: port 1(bridge_slave_0) entered forwarding state [ 134.003253][ T8635] 8021q: adding VLAN 0 to HW filter on device bond0 [ 134.014174][ T3503] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 134.034386][ T3503] bridge0: port 1(bridge_slave_0) entered disabled state [ 134.042548][ T3503] bridge0: port 2(bridge_slave_1) entered disabled state [ 134.051606][ T3503] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 134.063493][ T8635] 8021q: adding VLAN 0 to HW filter on device team0 [ 134.074016][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 134.082703][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 134.089813][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 134.100137][ T3503] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 134.108610][ T3503] bridge0: port 2(bridge_slave_1) entered blocking state [ 134.115693][ T3503] bridge0: port 2(bridge_slave_1) entered forwarding state [ 134.131928][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 134.140591][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 134.156527][ T8635] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 134.167996][ T8635] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 134.181320][ T8637] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 134.189738][ T8637] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 134.198171][ T8637] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready executing program [ 134.206712][ T8637] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 134.224349][ T8635] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 239.269588][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 239.276359][ C0] rcu: 0-...!: (10500 ticks this GP) idle=08e/1/0x4000000000000002 softirq=9183/9183 fqs=0 [ 239.286716][ C0] (t=10501 jiffies g=6973 q=81) [ 239.291636][ C0] rcu: rcu_preempt kthread starved for 10502 jiffies! g6973 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 [ 239.302894][ C0] rcu: RCU grace-period kthread stack dump: [ 239.308763][ C0] rcu_preempt I29224 10 2 0x80004000 [ 239.315078][ C0] Call Trace: [ 239.318471][ C0] __schedule+0x76e/0x17a0 [ 239.322872][ C0] ? __sched_text_start+0x8/0x8 [ 239.327704][ C0] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 239.333490][ C0] ? schedule_timeout+0x47c/0xc50 [ 239.338573][ C0] ? lockdep_hardirqs_on+0x418/0x5d0 [ 239.343840][ C0] schedule+0xd9/0x260 [ 239.347887][ C0] schedule_timeout+0x486/0xc50 [ 239.352727][ C0] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 239.358517][ C0] ? usleep_range+0x170/0x170 [ 239.363209][ C0] ? trace_hardirqs_on+0x67/0x240 [ 239.368251][ C0] ? __kasan_check_read+0x11/0x20 [ 239.373277][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 239.378815][ C0] ? swake_up_one+0x60/0x60 [ 239.383324][ C0] rcu_gp_kthread+0x9b2/0x18d0 [ 239.388071][ C0] ? invoke_rcu_core+0x230/0x230 [ 239.393000][ C0] ? trace_hardirqs_on+0x67/0x240 [ 239.398002][ C0] ? __kasan_check_read+0x11/0x20 [ 239.403057][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 239.409312][ C0] ? __kthread_parkme+0x108/0x1c0 [ 239.414317][ C0] ? __kasan_check_read+0x11/0x20 [ 239.419330][ C0] kthread+0x361/0x430 [ 239.423376][ C0] ? invoke_rcu_core+0x230/0x230 [ 239.428292][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 239.434516][ C0] ret_from_fork+0x24/0x30 [ 239.439041][ C0] NMI backtrace for cpu 0 [ 239.443393][ C0] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.3.0-rc6-next-20190830 #75 [ 239.451952][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 239.462065][ C0] Workqueue: ipv6_addrconf addrconf_dad_work [ 239.468049][ C0] Call Trace: [ 239.471312][ C0] [ 239.474180][ C0] dump_stack+0x172/0x1f0 [ 239.478493][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 239.483671][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 239.489938][ C0] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 239.495555][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 239.501517][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 239.507391][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 239.512490][ C0] rcu_sched_clock_irq.cold+0x4fd/0xc12 [ 239.518050][ C0] ? raise_softirq+0x138/0x340 [ 239.522802][ C0] update_process_times+0x2d/0x70 [ 239.527827][ C0] tick_sched_handle+0xa2/0x190 [ 239.532686][ C0] tick_sched_timer+0x53/0x140 [ 239.537433][ C0] __hrtimer_run_queues+0x364/0xe40 [ 239.542616][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 239.547882][ C0] ? hrtimer_sleeper_start_expires+0x90/0x90 [ 239.553840][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 239.559544][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 239.565594][ C0] hrtimer_interrupt+0x314/0x770 [ 239.570518][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 239.576135][ C0] apic_timer_interrupt+0xf/0x20 [ 239.581052][ C0] RIP: 0010:write_comp_data+0x10/0x70 [ 239.586430][ C0] Code: 00 00 48 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 5d c3 0f 1f 00 65 4c 8b 04 25 40 fe 01 00 65 8b 05 98 a7 8f 7e 00 01 1f 00 75 51 41 8b 80 00 13 00 00 83 f8 03 75 45 49 8b 80 [ 239.606021][ C0] RSP: 0018:ffff8880ae808b30 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 239.614414][ C0] RAX: 0000000000000302 RBX: ffff888099da5af8 RCX: ffffffff85cb69b9 [ 239.622366][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 [ 239.630316][ C0] RBP: ffff8880ae808b38 R08: ffff8880a98bc300 R09: fffffbfff14ed341 [ 239.638263][ C0] R10: ffff8880a98bcd08 R11: ffff8880a98bc300 R12: dffffc0000000000 [ 239.646212][ C0] R13: ffff888099da5800 R14: ffff888099da5b90 R15: 0000000000000000 [ 239.654180][ C0] ? apic_timer_interrupt+0xa/0x20 [ 239.659358][ C0] ? hhf_dequeue+0xb9/0xa20 [ 239.663853][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 239.670163][ C0] hhf_dequeue+0xb9/0xa20 [ 239.674536][ C0] __qdisc_run+0x1e7/0x19d0 [ 239.679054][ C0] ? dev_queue_xmit+0x18/0x20 [ 239.683730][ C0] __dev_queue_xmit+0x16f1/0x37c0 [ 239.688731][ C0] ? process_backlog+0x206/0x750 [ 239.693646][ C0] ? net_rx_action+0x50a/0x10d0 [ 239.698477][ C0] ? __do_softirq+0x262/0x98c [ 239.703154][ C0] ? do_softirq_own_stack+0x2a/0x40 [ 239.708330][ C0] ? do_softirq.part.0+0x11a/0x170 [ 239.713425][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 239.718696][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 239.724961][ C0] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 239.731101][ C0] ? rcu_read_lock_held+0x9c/0xb0 [ 239.736141][ C0] dev_queue_xmit+0x18/0x20 [ 239.740717][ C0] ? dev_queue_xmit+0x18/0x20 [ 239.745485][ C0] br_dev_queue_push_xmit+0x3f3/0x5e0 [ 239.750877][ C0] ? __skb_ext_del+0xb0/0x2c0 [ 239.755546][ C0] ? lock_downgrade+0x920/0x920 [ 239.760430][ C0] br_nf_dev_queue_xmit+0x34e/0x14b0 [ 239.765709][ C0] br_nf_post_routing+0x1502/0x1d30 [ 239.770896][ C0] ? br_nf_dev_queue_xmit+0x14b0/0x14b0 [ 239.776429][ C0] ? nf_bridge_update_protocol+0x1d0/0x1d0 [ 239.782217][ C0] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 239.788415][ C0] nf_hook_slow+0xbc/0x1e0 [ 239.792819][ C0] br_forward_finish+0x215/0x400 [ 239.797739][ C0] ? br_dev_queue_push_xmit+0x5e0/0x5e0 [ 239.803266][ C0] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 239.809402][ C0] ? br_fdb_add.cold+0x83/0x83 [ 239.814239][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 239.819936][ C0] ? nf_hook_slow+0xf0/0x1e0 [ 239.824513][ C0] br_nf_hook_thresh+0x2e9/0x370 [ 239.829431][ C0] ? br_dev_queue_push_xmit+0x5e0/0x5e0 [ 239.834974][ C0] ? setup_pre_routing+0x4b0/0x4b0 [ 239.840070][ C0] ? br_dev_queue_push_xmit+0x5e0/0x5e0 [ 239.845596][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 239.851819][ C0] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 239.857694][ C0] br_nf_forward_finish+0x66c/0xa90 [ 239.862890][ C0] ? br_dev_queue_push_xmit+0x5e0/0x5e0 [ 239.868421][ C0] br_nf_forward_ip+0xc74/0x21e0 [ 239.873342][ C0] ? br_nf_forward_arp+0x1670/0x1670 [ 239.878610][ C0] ? br_nf_hook_thresh+0x370/0x370 [ 239.883701][ C0] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 239.889852][ C0] nf_hook_slow+0xbc/0x1e0 [ 239.894255][ C0] __br_forward+0x393/0xb00 [ 239.898738][ C0] ? br_forward_finish+0x400/0x400 [ 239.903842][ C0] ? br_dev_queue_push_xmit+0x5e0/0x5e0 [ 239.909375][ C0] deliver_clone+0x61/0xc0 [ 239.913783][ C0] br_flood+0x325/0x3d0 [ 239.917931][ C0] br_handle_frame_finish+0xb46/0x1670 [ 239.923374][ C0] ? br_handle_local_finish+0x20/0x20 [ 239.928725][ C0] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 239.934874][ C0] ? rcu_read_lock_held+0x9c/0xb0 [ 239.939892][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 239.945598][ C0] ? nf_hook_slow+0xf0/0x1e0 [ 239.950172][ C0] br_nf_hook_thresh+0x2e9/0x370 [ 239.955089][ C0] ? br_handle_local_finish+0x20/0x20 [ 239.960441][ C0] ? setup_pre_routing+0x4b0/0x4b0 [ 239.965535][ C0] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 239.971669][ C0] ? br_handle_local_finish+0x20/0x20 [ 239.977019][ C0] ? rcu_read_lock_held+0x9c/0xb0 [ 239.982025][ C0] ? rcu_read_lock_held_common+0x130/0x130 [ 239.987813][ C0] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 239.993685][ C0] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 239.999573][ C0] br_nf_pre_routing_finish_ipv6+0x6fa/0xdb0 [ 240.005532][ C0] ? br_handle_local_finish+0x20/0x20 [ 240.010884][ C0] ? __kasan_check_read+0x11/0x20 [ 240.015900][ C0] br_nf_pre_routing_ipv6+0x456/0x840 [ 240.021253][ C0] ? br_validate_ipv6+0xb80/0xb80 [ 240.026260][ C0] ? br_nf_pre_routing+0x2360/0x2360 [ 240.031526][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 240.037750][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 240.043971][ C0] ? skb_pull_rcsum+0x155/0x300 [ 240.048813][ C0] br_nf_pre_routing+0x1743/0x2360 [ 240.053912][ C0] ? br_nf_pre_routing_finish+0x17a0/0x17a0 [ 240.059792][ C0] ? br_nf_pre_routing_finish+0x17a0/0x17a0 [ 240.065661][ C0] br_handle_frame+0x806/0x1340 [ 240.070495][ C0] ? br_handle_frame_finish+0x1670/0x1670 [ 240.076207][ C0] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 240.082343][ C0] ? br_handle_local_finish+0x20/0x20 [ 240.087707][ C0] ? rcu_read_lock_held_common+0x130/0x130 [ 240.093495][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 240.099715][ C0] ? br_handle_frame_finish+0x1670/0x1670 [ 240.105415][ C0] __netif_receive_skb_core+0xfc1/0x3060 [ 240.111028][ C0] ? __kasan_check_read+0x11/0x20 [ 240.116035][ C0] ? do_xdp_generic+0x50/0x50 [ 240.120694][ C0] ? __kasan_check_read+0x11/0x20 [ 240.125699][ C0] ? __lock_acquire+0x8a0/0x4a00 [ 240.130616][ C0] ? __kasan_check_read+0x11/0x20 [ 240.135642][ C0] __netif_receive_skb_one_core+0xa8/0x1a0 [ 240.141445][ C0] ? __netif_receive_skb_one_core+0xa8/0x1a0 [ 240.147422][ C0] ? __netif_receive_skb_core+0x3060/0x3060 [ 240.153325][ C0] ? lock_acquire+0x190/0x410 [ 240.158002][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 240.164242][ C0] __netif_receive_skb+0x2c/0x1d0 [ 240.169256][ C0] process_backlog+0x206/0x750 [ 240.174008][ C0] ? net_rx_action+0x27d/0x10d0 [ 240.178864][ C0] ? lockdep_hardirqs_on+0x19e/0x5d0 [ 240.184139][ C0] net_rx_action+0x50a/0x10d0 [ 240.188803][ C0] ? napi_busy_loop+0x970/0x970 [ 240.193649][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 240.199175][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 240.205142][ C0] ? ip6_finish_output2+0x106d/0x2550 [ 240.210495][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 240.216716][ C0] __do_softirq+0x262/0x98c [ 240.221204][ C0] ? ip6_finish_output2+0x106d/0x2550 [ 240.226558][ C0] do_softirq_own_stack+0x2a/0x40 [ 240.231559][ C0] [ 240.234483][ C0] do_softirq.part.0+0x11a/0x170 [ 240.239401][ C0] __local_bh_enable_ip+0x211/0x270 [ 240.244587][ C0] ip6_finish_output2+0x10a0/0x2550 [ 240.249782][ C0] ? ip6_forward_finish+0x570/0x570 [ 240.254962][ C0] ? lock_downgrade+0x920/0x920 [ 240.259797][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 240.266020][ C0] ? __kasan_check_read+0x11/0x20 [ 240.271030][ C0] __ip6_finish_output+0x444/0xaa0 [ 240.276122][ C0] ? __ip6_finish_output+0x444/0xaa0 [ 240.281390][ C0] ip6_finish_output+0x38/0x1f0 [ 240.286220][ C0] ip6_output+0x235/0x7f0 [ 240.290542][ C0] ? ip6_finish_output+0x1f0/0x1f0 [ 240.295637][ C0] ? __ip6_finish_output+0xaa0/0xaa0 [ 240.301434][ C0] ndisc_send_skb+0xf29/0x14a0 [ 240.306194][ C0] ? nf_hook.constprop.0+0x560/0x560 [ 240.311497][ C0] ? skb_set_owner_w+0x21b/0x320 [ 240.316443][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 240.322160][ C0] ndisc_send_ns+0x3a9/0x850 [ 240.326733][ C0] ? mark_held_locks+0xa4/0xf0 [ 240.331482][ C0] ? ndisc_netdev_event+0x4e0/0x4e0 [ 240.336660][ C0] ? lockdep_hardirqs_on+0x418/0x5d0 [ 240.341932][ C0] ? addrconf_dad_work+0xac4/0x1150 [ 240.347111][ C0] ? trace_hardirqs_on+0x67/0x240 [ 240.352120][ C0] ? addrconf_dad_work+0xac4/0x1150 [ 240.357326][ C0] addrconf_dad_work+0xb88/0x1150 [ 240.362337][ C0] ? addrconf_dad_completed+0xbb0/0xbb0 [ 240.367868][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 240.373830][ C0] ? trace_hardirqs_on+0x67/0x240 [ 240.378890][ C0] process_one_work+0x9af/0x1740 [ 240.383813][ C0] ? __schedule+0x776/0x17a0 [ 240.388391][ C0] ? pwq_dec_nr_in_flight+0x320/0x320 [ 240.393742][ C0] ? lock_acquire+0x190/0x410 [ 240.398408][ C0] worker_thread+0x98/0xe40 [ 240.402892][ C0] ? trace_hardirqs_on+0x67/0x240 [ 240.407910][ C0] kthread+0x361/0x430 [ 240.411962][ C0] ? process_one_work+0x1740/0x1740 [ 240.417140][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 240.423363][ C0] ret_from_fork+0x24/0x30