[ 51.258731][ T26] audit: type=1800 audit(1568375332.064:21): pid=9002 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2419 res=0 [ 51.283107][ T26] audit: type=1800 audit(1568375332.064:22): pid=9002 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2447 res=0 [ 51.303051][ T26] audit: type=1800 audit(1568375332.074:23): pid=9002 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rsyslog" dev="sda1" ino=2442 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] 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 '10.128.0.113' (ECDSA) to the list of known hosts. syzkaller login: [ 151.312206][ T9154] IPVS: ftp: loaded support on port[0] = 21 [ 151.347668][ T9154] chnl_net:caif_netlink_parms(): no params data found [ 151.366174][ T9154] bridge0: port 1(bridge_slave_0) entered blocking state [ 151.373511][ T9154] bridge0: port 1(bridge_slave_0) entered disabled state [ 151.380981][ T9154] device bridge_slave_0 entered promiscuous mode [ 151.388146][ T9154] bridge0: port 2(bridge_slave_1) entered blocking state [ 151.395364][ T9154] bridge0: port 2(bridge_slave_1) entered disabled state [ 151.403045][ T9154] device bridge_slave_1 entered promiscuous mode [ 151.415620][ T9154] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 151.425637][ T9154] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 151.439450][ T9154] team0: Port device team_slave_0 added [ 151.446259][ T9154] team0: Port device team_slave_1 added [ 151.523758][ T9154] device hsr_slave_0 entered promiscuous mode [ 151.572797][ T9154] device hsr_slave_1 entered promiscuous mode [ 151.646806][ T9154] bridge0: port 2(bridge_slave_1) entered blocking state [ 151.654040][ T9154] bridge0: port 2(bridge_slave_1) entered forwarding state [ 151.661303][ T9154] bridge0: port 1(bridge_slave_0) entered blocking state [ 151.668385][ T9154] bridge0: port 1(bridge_slave_0) entered forwarding state [ 151.689936][ T9154] 8021q: adding VLAN 0 to HW filter on device bond0 [ 151.699166][ T3024] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 151.718040][ T3024] bridge0: port 1(bridge_slave_0) entered disabled state [ 151.725407][ T3024] bridge0: port 2(bridge_slave_1) entered disabled state [ 151.733390][ T3024] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 151.742747][ T9154] 8021q: adding VLAN 0 to HW filter on device team0 [ 151.753854][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 151.762067][ T22] bridge0: port 1(bridge_slave_0) entered blocking state [ 151.769132][ T22] bridge0: port 1(bridge_slave_0) entered forwarding state [ 151.776589][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 151.785397][ T22] bridge0: port 2(bridge_slave_1) entered blocking state [ 151.792500][ T22] bridge0: port 2(bridge_slave_1) entered forwarding state [ 151.803146][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 151.811785][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 151.820789][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 151.830602][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 151.840774][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready executing program [ 151.850290][ T9154] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 151.863413][ T9154] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 256.882529][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 256.889225][ C0] rcu: 0-...!: (1 GPs behind) idle=c92/0/0x3 softirq=9307/9308 fqs=21 [ 256.897526][ C0] (t=10500 jiffies g=6649 q=182) [ 256.902552][ C0] rcu: rcu_preempt kthread starved for 10458 jiffies! g6649 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 256.913799][ C0] rcu: RCU grace-period kthread stack dump: [ 256.919695][ C0] rcu_preempt I28896 10 2 0x80004000 [ 256.926039][ C0] Call Trace: [ 256.929415][ C0] __schedule+0x877/0xc50 [ 256.933724][ C0] schedule+0x131/0x1e0 [ 256.937860][ C0] schedule_timeout+0x14f/0x240 [ 256.942773][ C0] ? run_local_timers+0x120/0x120 [ 256.947790][ C0] rcu_gp_kthread+0xef8/0x1790 [ 256.952565][ C0] kthread+0x332/0x350 [ 256.956613][ C0] ? rcu_report_qs_rsp+0x150/0x150 [ 256.961707][ C0] ? kthread_blkcg+0xe0/0xe0 [ 256.966313][ C0] ret_from_fork+0x24/0x30 [ 256.970757][ C0] NMI backtrace for cpu 0 [ 256.975089][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.3.0-rc8+ #0 [ 256.982183][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 256.992225][ C0] Call Trace: [ 256.995485][ C0] [ 256.998366][ C0] dump_stack+0x1d8/0x2f8 [ 257.002675][ C0] nmi_cpu_backtrace+0xaf/0x1a0 [ 257.007587][ C0] ? nmi_trigger_cpumask_backtrace+0x16d/0x290 [ 257.013770][ C0] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 257.019820][ C0] nmi_trigger_cpumask_backtrace+0x174/0x290 [ 257.025776][ C0] arch_trigger_cpumask_backtrace+0x10/0x20 [ 257.031642][ C0] rcu_dump_cpu_stacks+0x15a/0x220 [ 257.036750][ C0] rcu_sched_clock_irq+0xb95/0x16d0 [ 257.042043][ C0] ? trace_hardirqs_off+0x74/0x80 [ 257.050443][ C0] update_process_times+0x134/0x190 [ 257.055655][ C0] tick_sched_timer+0x263/0x420 [ 257.060483][ C0] ? tick_setup_sched_timer+0x2c0/0x2c0 [ 257.066018][ C0] __hrtimer_run_queues+0x403/0x850 [ 257.071216][ C0] hrtimer_interrupt+0x38c/0xda0 [ 257.076143][ C0] ? kvm_sched_clock_read+0x19/0x40 [ 257.081324][ C0] smp_apic_timer_interrupt+0x109/0x280 [ 257.086854][ C0] apic_timer_interrupt+0xf/0x20 [ 257.091872][ C0] RIP: 0010:hhf_dequeue+0x4d8/0xaa0 [ 257.097086][ C0] Code: 08 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 bb 27 a0 fb 48 8b 1b 48 8d 7b 08 48 89 f8 48 c1 e8 03 42 80 3c 20 00 <74> 05 e8 41 28 a0 fb 4c 89 73 08 4c 89 f0 48 c1 e8 03 42 80 3c 20 [ 257.116669][ C0] RSP: 0018:ffff8880aea09478 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 257.125056][ C0] RAX: 1ffff11012f8b623 RBX: ffff888097c5b110 RCX: ffffffff88875a00 [ 257.133017][ C0] RDX: 0000000000000702 RSI: 0000000000000000 RDI: ffff888097c5b118 [ 257.140963][ C0] RBP: ffff8880aea09520 R08: ffffffff860c5d6a R09: 0000000000000000 [ 257.148954][ C0] R10: fffffbfff117be8d R11: 0000000000000000 R12: dffffc0000000000 [ 257.156916][ C0] R13: ffff888097c5ad80 R14: ffff888097c5b110 R15: ffff888097c5b100 [ 257.164880][ C0] ? apic_timer_interrupt+0xa/0x20 [ 257.169970][ C0] ? hhf_dequeue+0x15a/0xaa0 [ 257.174540][ C0] ? hhf_dequeue+0x490/0xaa0 [ 257.179120][ C0] ? hhf_enqueue+0x19dc/0x2110 [ 257.183909][ C0] __qdisc_run+0x217/0x1b30 [ 257.188436][ C0] ? dev_queue_xmit+0x17/0x20 [ 257.193100][ C0] __dev_queue_xmit+0x1161/0x3020 [ 257.198106][ C0] dev_queue_xmit+0x17/0x20 [ 257.202620][ C0] br_dev_queue_push_xmit+0x551/0x650 [ 257.207981][ C0] ? fdb_add_hw_addr+0x220/0x220 [ 257.212905][ C0] __br_forward+0x439/0x720 [ 257.217394][ C0] br_flood+0x52e/0x840 [ 257.221552][ C0] br_dev_xmit+0xcb6/0x1100 [ 257.226034][ C0] dev_hard_start_xmit+0x1c1/0x3f0 [ 257.231127][ C0] __dev_queue_xmit+0x1e86/0x3020 [ 257.236167][ C0] ? ip_finish_output2+0x10b5/0x18d0 [ 257.241428][ C0] ? ip_finish_output2+0x11ee/0x18d0 [ 257.246689][ C0] dev_queue_xmit+0x17/0x20 [ 257.251167][ C0] ip_finish_output2+0x145c/0x18d0 [ 257.256255][ C0] __ip_finish_output+0x801/0xa70 [ 257.261270][ C0] ip_finish_output+0x52/0x1e0 [ 257.266010][ C0] ? ip_output+0x17e/0x280 [ 257.270404][ C0] ip_output+0x1bc/0x280 [ 257.274623][ C0] ip_local_out+0x105/0x140 [ 257.279163][ C0] igmpv3_sendpack+0x15a/0x230 [ 257.283921][ C0] igmp_ifc_timer_expire+0xb39/0xf60 [ 257.289187][ C0] ? call_timer_fn+0x5d/0x170 [ 257.293857][ C0] ? igmp_gq_timer_expire+0x80/0x80 [ 257.299036][ C0] call_timer_fn+0x95/0x170 [ 257.303516][ C0] ? igmp_gq_timer_expire+0x80/0x80 [ 257.308688][ C0] __run_timers+0x79e/0x970 [ 257.313240][ C0] ? check_preemption_disabled+0x47/0x2a0 [ 257.318937][ C0] ? check_preemption_disabled+0x47/0x2a0 [ 257.324650][ C0] run_timer_softirq+0x4a/0x90 [ 257.329390][ C0] __do_softirq+0x333/0x7c4 [ 257.334357][ C0] ? irq_exit+0x227/0x230 [ 257.338692][ C0] irq_exit+0x227/0x230 [ 257.342822][ C0] smp_apic_timer_interrupt+0x113/0x280 [ 257.348342][ C0] apic_timer_interrupt+0xf/0x20 [ 257.353252][ C0] [ 257.356167][ C0] RIP: 0010:native_safe_halt+0xe/0x10 [ 257.361533][ C0] Code: 30 fa eb ae 89 d9 80 e1 07 80 c1 03 38 c1 7c ba 48 89 df e8 74 a1 30 fa eb b0 90 90 e9 07 00 00 00 0f 00 2d 96 a0 46 00 fb f4 90 e9 07 00 00 00 0f 00 2d 86 a0 46 00 f4 c3 90 90 55 48 89 e5 [ 257.381124][ C0] RSP: 0018:ffffffff88807dc0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 257.389512][ C0] RAX: 1ffffffff11150f3 RBX: ffffffff88875a00 RCX: dffffc0000000000 [ 257.397650][ C0] RDX: 0000000000000000 RSI: ffffffff812b7a1a RDI: ffffffff877be46a [ 257.405611][ C0] RBP: ffffffff88807dc8 R08: ffffffff81790e74 R09: fffffbfff110eb41 [ 257.413561][ C0] R10: fffffbfff110eb41 R11: 0000000000000000 R12: dffffc0000000000 [ 257.421521][ C0] R13: 1ffffffff110eb40 R14: dffffc0000000000 R15: 0000000000000000 [ 257.429668][ C0] ? trace_hardirqs_on+0x34/0x80 [ 257.434639][ C0] ? arch_cpu_idle+0xa/0x10 [ 257.439118][ C0] ? default_idle+0x1a/0x70 [ 257.443597][ C0] ? default_idle+0x50/0x70 [ 257.448073][ C0] arch_cpu_idle+0xa/0x10 [ 257.452375][ C0] default_idle_call+0x59/0xa0 [ 257.457154][ C0] do_idle+0x140/0x6d0 [ 257.461200][ C0] ? debug_smp_processor_id+0x1c/0x20 [ 257.466562][ C0] cpu_startup_entry+0x25/0x30 [ 257.471301][ C0] rest_init+0x29d/0x2b0 [ 257.475598][ C0] arch_call_rest_init+0xe/0x10 [ 257.480447][ C0] start_kernel+0x6f5/0x7f6 [ 257.484928][ C0] x86_64_start_reservations+0x18/0x2e [ 257.490459][ C0] x86_64_start_kernel+0x7a/0x7d [ 257.495409][ C0] secondary_startup_64+0xa4/0xb0