[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 53.295249][ T26] audit: type=1800 audit(1568553000.564:25): pid=8410 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 53.316371][ T26] audit: type=1800 audit(1568553000.564:26): pid=8410 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 53.377665][ T26] audit: type=1800 audit(1568553000.564:27): pid=8410 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 '10.128.15.198' (ECDSA) to the list of known hosts. syzkaller login: [ 378.425784][ T8563] IPVS: ftp: loaded support on port[0] = 21 [ 378.486351][ T8563] chnl_net:caif_netlink_parms(): no params data found [ 378.515926][ T8563] bridge0: port 1(bridge_slave_0) entered blocking state [ 378.523878][ T8563] bridge0: port 1(bridge_slave_0) entered disabled state [ 378.531808][ T8563] device bridge_slave_0 entered promiscuous mode [ 378.540043][ T8563] bridge0: port 2(bridge_slave_1) entered blocking state [ 378.547125][ T8563] bridge0: port 2(bridge_slave_1) entered disabled state [ 378.554930][ T8563] device bridge_slave_1 entered promiscuous mode [ 378.571759][ T8563] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 378.582544][ T8563] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 378.601210][ T8563] team0: Port device team_slave_0 added [ 378.608035][ T8563] team0: Port device team_slave_1 added [ 378.690083][ T8563] device hsr_slave_0 entered promiscuous mode [ 378.758816][ T8563] device hsr_slave_1 entered promiscuous mode [ 378.815890][ T8563] bridge0: port 2(bridge_slave_1) entered blocking state [ 378.823269][ T8563] bridge0: port 2(bridge_slave_1) entered forwarding state [ 378.831088][ T8563] bridge0: port 1(bridge_slave_0) entered blocking state [ 378.838203][ T8563] bridge0: port 1(bridge_slave_0) entered forwarding state [ 378.871955][ T8563] 8021q: adding VLAN 0 to HW filter on device bond0 [ 378.883262][ T8565] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 378.903591][ T8565] bridge0: port 1(bridge_slave_0) entered disabled state [ 378.911730][ T8565] bridge0: port 2(bridge_slave_1) entered disabled state [ 378.920644][ T8565] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 378.932849][ T8563] 8021q: adding VLAN 0 to HW filter on device team0 [ 378.943180][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 378.952034][ T22] bridge0: port 1(bridge_slave_0) entered blocking state [ 378.959259][ T22] bridge0: port 1(bridge_slave_0) entered forwarding state [ 378.979395][ T8565] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 378.987982][ T8565] bridge0: port 2(bridge_slave_1) entered blocking state [ 378.995287][ T8565] bridge0: port 2(bridge_slave_1) entered forwarding state [ 379.004028][ T8565] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 379.012700][ T8565] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready executing program [ 379.023266][ T8565] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 379.031156][ T8565] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 379.043341][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 379.053812][ T8563] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 379.071677][ T8563] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 484.138080][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 484.144800][ C1] rcu: 1-...!: (1 GPs behind) idle=cde/1/0x4000000000000002 softirq=9253/9253 fqs=5 [ 484.154442][ C1] (t=10501 jiffies g=6785 q=58) [ 484.159366][ C1] rcu: rcu_preempt kthread starved for 10492 jiffies! g6785 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 484.170462][ C1] rcu: RCU grace-period kthread stack dump: [ 484.176331][ C1] rcu_preempt R running task 29440 10 2 0x80004000 [ 484.184230][ C1] Call Trace: [ 484.187587][ C1] __schedule+0x76e/0x17a0 [ 484.191993][ C1] ? __sched_text_start+0x8/0x8 [ 484.196825][ C1] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 484.202611][ C1] ? schedule_timeout+0x47c/0xc50 [ 484.207619][ C1] ? lockdep_hardirqs_on+0x418/0x5d0 [ 484.212888][ C1] schedule+0xd9/0x260 [ 484.216942][ C1] schedule_timeout+0x486/0xc50 [ 484.221774][ C1] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 484.227564][ C1] ? usleep_range+0x170/0x170 [ 484.232222][ C1] ? trace_hardirqs_on+0x67/0x240 [ 484.237231][ C1] ? __kasan_check_read+0x11/0x20 [ 484.242242][ C1] ? __next_timer_interrupt+0x1a0/0x1a0 [ 484.247769][ C1] ? swake_up_one+0x60/0x60 [ 484.252259][ C1] rcu_gp_kthread+0x9b2/0x18d0 [ 484.257006][ C1] ? invoke_rcu_core+0x230/0x230 [ 484.261925][ C1] ? trace_hardirqs_on+0x67/0x240 [ 484.266928][ C1] ? __kasan_check_read+0x11/0x20 [ 484.271942][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 484.278163][ C1] ? __kthread_parkme+0x108/0x1c0 [ 484.283166][ C1] ? __kasan_check_read+0x11/0x20 [ 484.288176][ C1] kthread+0x361/0x430 [ 484.292226][ C1] ? invoke_rcu_core+0x230/0x230 [ 484.297144][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 484.303367][ C1] ret_from_fork+0x24/0x30 [ 484.307779][ C1] NMI backtrace for cpu 1 [ 484.312103][ C1] CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.3.0-rc6-next-20190830 #75 [ 484.320668][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 484.330703][ C1] Call Trace: [ 484.333966][ C1] [ 484.336872][ C1] dump_stack+0x172/0x1f0 [ 484.341188][ C1] nmi_cpu_backtrace.cold+0x70/0xb2 [ 484.346368][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 484.352599][ C1] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 484.358213][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 484.364173][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 484.370143][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 484.375240][ C1] rcu_sched_clock_irq.cold+0x4fd/0xc12 [ 484.380770][ C1] ? raise_softirq+0x138/0x340 [ 484.385519][ C1] update_process_times+0x2d/0x70 [ 484.390526][ C1] tick_sched_handle+0xa2/0x190 [ 484.395356][ C1] tick_sched_timer+0x53/0x140 [ 484.400103][ C1] __hrtimer_run_queues+0x364/0xe40 [ 484.405283][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 484.410552][ C1] ? hrtimer_sleeper_start_expires+0x90/0x90 [ 484.416517][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 484.422217][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 484.428284][ C1] hrtimer_interrupt+0x314/0x770 [ 484.433211][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 484.438738][ C1] apic_timer_interrupt+0xf/0x20 [ 484.443650][ C1] [ 484.446615][ C1] RIP: 0010:hhf_dequeue+0x674/0xa20 [ 484.451803][ C1] Code: e8 03 42 80 3c 20 00 0f 85 5b 03 00 00 4d 8b bd 98 03 00 00 48 89 df 48 8b 55 c8 4c 89 fe e8 43 55 77 fd 31 ff 89 c6 88 45 b0 d7 e7 a6 fb 0f b6 75 b0 40 84 f6 0f 84 c6 f9 ff ff e8 85 e6 a6 [ 484.471391][ C1] RSP: 0018:ffff8880a99069a8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 484.479782][ C1] RAX: 0000000000000001 RBX: ffff8880a34beaf8 RCX: ffffffff85cb6ed1 [ 484.487732][ C1] RDX: ffff8880a34beb90 RSI: 0000000000000001 RDI: 0000000000000000 [ 484.495682][ C1] RBP: ffff8880a99069f8 R08: ffff8880a98f2440 R09: fffffbfff14ed341 [ 484.503633][ C1] R10: ffff8880a98f2da8 R11: ffff8880a98f2440 R12: dffffc0000000000 [ 484.511673][ C1] R13: ffff8880a34be800 R14: ffff8880a34beb98 R15: ffff8880a34beb90 [ 484.519634][ C1] ? hhf_dequeue+0x5d1/0xa20 [ 484.524207][ C1] ? hhf_dequeue+0x66d/0xa20 [ 484.528825][ C1] __qdisc_run+0x1e7/0x19d0 [ 484.533326][ C1] ? dev_queue_xmit+0x18/0x20 [ 484.538002][ C1] __dev_queue_xmit+0x16f1/0x37c0 [ 484.543006][ C1] ? process_backlog+0x206/0x750 [ 484.547935][ C1] ? net_rx_action+0x50a/0x10d0 [ 484.552777][ C1] ? __do_softirq+0x262/0x98c [ 484.557442][ C1] ? run_ksoftirqd+0x8e/0x110 [ 484.562100][ C1] ? smpboot_thread_fn+0x6a3/0xa40 [ 484.567196][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 484.572488][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 484.578713][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 484.584849][ C1] ? rcu_read_lock_held+0x9c/0xb0 [ 484.589860][ C1] dev_queue_xmit+0x18/0x20 [ 484.594343][ C1] ? dev_queue_xmit+0x18/0x20 [ 484.599047][ C1] br_dev_queue_push_xmit+0x3f3/0x5e0 [ 484.604422][ C1] ? __skb_ext_del+0xb0/0x2c0 [ 484.609082][ C1] ? lock_downgrade+0x920/0x920 [ 484.613948][ C1] br_nf_dev_queue_xmit+0x34e/0x14b0 [ 484.619221][ C1] br_nf_post_routing+0x1502/0x1d30 [ 484.624405][ C1] ? br_nf_dev_queue_xmit+0x14b0/0x14b0 [ 484.629940][ C1] ? nf_bridge_update_protocol+0x1d0/0x1d0 [ 484.635729][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 484.641917][ C1] nf_hook_slow+0xbc/0x1e0 [ 484.646323][ C1] br_forward_finish+0x215/0x400 [ 484.651245][ C1] ? br_dev_queue_push_xmit+0x5e0/0x5e0 [ 484.656774][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 484.662912][ C1] ? br_fdb_add.cold+0x83/0x83 [ 484.667657][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 484.673355][ C1] ? nf_hook_slow+0xf0/0x1e0 [ 484.677941][ C1] br_nf_hook_thresh+0x2e9/0x370 [ 484.682874][ C1] ? br_dev_queue_push_xmit+0x5e0/0x5e0 [ 484.688407][ C1] ? setup_pre_routing+0x4b0/0x4b0 [ 484.693501][ C1] ? br_dev_queue_push_xmit+0x5e0/0x5e0 [ 484.699028][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 484.705266][ C1] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 484.711141][ C1] br_nf_forward_finish+0x66c/0xa90 [ 484.716321][ C1] ? br_dev_queue_push_xmit+0x5e0/0x5e0 [ 484.721851][ C1] br_nf_forward_ip+0xc74/0x21e0 [ 484.726779][ C1] ? br_nf_forward_arp+0x1670/0x1670 [ 484.732048][ C1] ? br_nf_hook_thresh+0x370/0x370 [ 484.737142][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 484.743280][ C1] nf_hook_slow+0xbc/0x1e0 [ 484.747684][ C1] __br_forward+0x393/0xb00 [ 484.752171][ C1] ? br_forward_finish+0x400/0x400 [ 484.757266][ C1] ? br_dev_queue_push_xmit+0x5e0/0x5e0 [ 484.762800][ C1] deliver_clone+0x61/0xc0 [ 484.767199][ C1] br_flood+0x325/0x3d0 [ 484.771353][ C1] br_handle_frame_finish+0xb46/0x1670 [ 484.776796][ C1] ? br_handle_local_finish+0x20/0x20 [ 484.782152][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 484.788301][ C1] ? rcu_read_lock_held+0x9c/0xb0 [ 484.793327][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 484.799031][ C1] ? nf_hook_slow+0xf0/0x1e0 [ 484.803609][ C1] br_nf_hook_thresh+0x2e9/0x370 [ 484.808532][ C1] ? br_handle_local_finish+0x20/0x20 [ 484.813889][ C1] ? setup_pre_routing+0x4b0/0x4b0 [ 484.818991][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 484.825132][ C1] ? br_handle_local_finish+0x20/0x20 [ 484.830484][ C1] ? rcu_read_lock_held+0x9c/0xb0 [ 484.835494][ C1] ? rcu_read_lock_held_common+0x130/0x130 [ 484.841300][ C1] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 484.847174][ C1] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 484.853052][ C1] br_nf_pre_routing_finish_ipv6+0x6fa/0xdb0 [ 484.859015][ C1] ? br_handle_local_finish+0x20/0x20 [ 484.864373][ C1] ? __kasan_check_read+0x11/0x20 [ 484.869383][ C1] br_nf_pre_routing_ipv6+0x456/0x840 [ 484.874737][ C1] ? br_validate_ipv6+0xb80/0xb80 [ 484.879747][ C1] ? br_nf_pre_routing+0x2360/0x2360 [ 484.885015][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 484.891243][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 484.897463][ C1] ? skb_pull_rcsum+0x155/0x300 [ 484.902300][ C1] br_nf_pre_routing+0x1743/0x2360 [ 484.907408][ C1] ? br_nf_pre_routing_finish+0x17a0/0x17a0 [ 484.913290][ C1] ? br_nf_pre_routing_finish+0x17a0/0x17a0 [ 484.919162][ C1] br_handle_frame+0x806/0x1340 [ 484.923997][ C1] ? br_handle_frame_finish+0x1670/0x1670 [ 484.929706][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 484.935839][ C1] ? br_handle_local_finish+0x20/0x20 [ 484.941205][ C1] ? rcu_read_lock_held_common+0x130/0x130 [ 484.946996][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 484.953233][ C1] ? br_handle_frame_finish+0x1670/0x1670 [ 484.958943][ C1] __netif_receive_skb_core+0xfc1/0x3060 [ 484.964561][ C1] ? __kasan_check_read+0x11/0x20 [ 484.969583][ C1] ? do_xdp_generic+0x50/0x50 [ 484.974242][ C1] ? __kasan_check_read+0x11/0x20 [ 484.979251][ C1] ? __lock_acquire+0x8a0/0x4a00 [ 484.984169][ C1] ? cpuacct_charge+0x1db/0x360 [ 484.989002][ C1] ? find_held_lock+0x35/0x130 [ 484.993764][ C1] __netif_receive_skb_one_core+0xa8/0x1a0 [ 484.999565][ C1] ? __netif_receive_skb_one_core+0xa8/0x1a0 [ 485.005527][ C1] ? __netif_receive_skb_core+0x3060/0x3060 [ 485.011404][ C1] ? lock_acquire+0x190/0x410 [ 485.016065][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 485.022291][ C1] __netif_receive_skb+0x2c/0x1d0 [ 485.027312][ C1] process_backlog+0x206/0x750 [ 485.032061][ C1] ? net_rx_action+0x27d/0x10d0 [ 485.036898][ C1] ? lockdep_hardirqs_on+0x19e/0x5d0 [ 485.042173][ C1] net_rx_action+0x50a/0x10d0 [ 485.046838][ C1] ? napi_busy_loop+0x970/0x970 [ 485.051674][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 485.057203][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 485.063172][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 485.070959][ C1] __do_softirq+0x262/0x98c [ 485.075449][ C1] ? takeover_tasklets+0x820/0x820 [ 485.080541][ C1] run_ksoftirqd+0x8e/0x110 [ 485.085040][ C1] smpboot_thread_fn+0x6a3/0xa40 [ 485.089963][ C1] ? smpboot_register_percpu_thread+0x390/0x390 [ 485.096186][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 485.102406][ C1] ? __kthread_parkme+0x108/0x1c0 [ 485.107410][ C1] ? __kasan_check_read+0x11/0x20 [ 485.112433][ C1] kthread+0x361/0x430 [ 485.116487][ C1] ? smpboot_register_percpu_thread+0x390/0x390 [ 485.122737][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 485.128968][ C1] ret_from_fork+0x24/0x30