[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 60.701384][ T26] audit: type=1800 audit(1568596713.578:25): pid=8429 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0
[ 60.723209][ T26] audit: type=1800 audit(1568596713.578:26): pid=8429 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0
[ 60.767382][ T26] audit: type=1800 audit(1568596713.588:27): pid=8429 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[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
Debian GNU/Linux 7 syzkaller ttyS0
Warning: Permanently added '10.128.0.125' (ECDSA) to the list of known hosts.
syzkaller login: [ 80.959730][ T8585] IPVS: ftp: loaded support on port[0] = 21
[ 81.013872][ T8585] chnl_net:caif_netlink_parms(): no params data found
[ 81.039882][ T8585] bridge0: port 1(bridge_slave_0) entered blocking state
[ 81.047190][ T8585] bridge0: port 1(bridge_slave_0) entered disabled state
[ 81.054925][ T8585] device bridge_slave_0 entered promiscuous mode
[ 81.062611][ T8585] bridge0: port 2(bridge_slave_1) entered blocking state
[ 81.069785][ T8585] bridge0: port 2(bridge_slave_1) entered disabled state
[ 81.077445][ T8585] device bridge_slave_1 entered promiscuous mode
[ 81.093261][ T8585] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[ 81.103779][ T8585] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[ 81.122505][ T8585] team0: Port device team_slave_0 added
[ 81.129344][ T8585] team0: Port device team_slave_1 added
[ 81.189678][ T8585] device hsr_slave_0 entered promiscuous mode
[ 81.257502][ T8585] device hsr_slave_1 entered promiscuous mode
[ 81.344447][ T8585] bridge0: port 2(bridge_slave_1) entered blocking state
[ 81.351696][ T8585] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 81.359357][ T8585] bridge0: port 1(bridge_slave_0) entered blocking state
[ 81.366388][ T8585] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 81.397238][ T8585] 8021q: adding VLAN 0 to HW filter on device bond0
[ 81.408605][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[ 81.418974][ T12] bridge0: port 1(bridge_slave_0) entered disabled state
[ 81.426787][ T12] bridge0: port 2(bridge_slave_1) entered disabled state
[ 81.434761][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready
[ 81.445498][ T8585] 8021q: adding VLAN 0 to HW filter on device team0
[ 81.455306][ T8587] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready
[ 81.463885][ T8587] bridge0: port 1(bridge_slave_0) entered blocking state
[ 81.470973][ T8587] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 81.481871][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready
[ 81.490808][ T12] bridge0: port 2(bridge_slave_1) entered blocking state
[ 81.497892][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 81.518266][ T8587] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready
[ 81.526834][ T8587] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready
[ 81.535244][ T8587] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready
executing program
[ 81.545142][ T8587] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
[ 81.554906][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
[ 81.565798][ T8585] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
[ 81.582878][ T8585] 8021q: adding VLAN 0 to HW filter on device batadv0
[ 186.647263][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU
[ 186.654005][ C0] rcu: 0-...!: (1 GPs behind) idle=6aa/0/0x3 softirq=10007/10008 fqs=3
[ 186.662524][ C0] (t=10501 jiffies g=6629 q=39)
[ 186.667445][ C0] rcu: rcu_preempt kthread starved for 10496 jiffies! g6629 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
[ 186.678694][ C0] rcu: RCU grace-period kthread stack dump:
[ 186.684561][ C0] rcu_preempt I29112 10 2 0x80004000
[ 186.690876][ C0] Call Trace:
[ 186.694155][ C0] __schedule+0x755/0x1580
[ 186.698556][ C0] ? __sched_text_start+0x8/0x8
[ 186.703391][ C0] ? _raw_spin_unlock_irqrestore+0x6b/0xe0
[ 186.709177][ C0] ? schedule_timeout+0x47c/0xc50
[ 186.714182][ C0] ? lockdep_hardirqs_on+0x418/0x5d0
[ 186.719475][ C0] schedule+0xd9/0x260
[ 186.723525][ C0] schedule_timeout+0x486/0xc50
[ 186.728352][ C0] ? _raw_spin_unlock_irqrestore+0x6b/0xe0
[ 186.734140][ C0] ? usleep_range+0x170/0x170
[ 186.738796][ C0] ? trace_hardirqs_on+0x67/0x240
[ 186.743801][ C0] ? __kasan_check_read+0x11/0x20
[ 186.748811][ C0] ? __next_timer_interrupt+0x1a0/0x1a0
[ 186.754338][ C0] ? swake_up_one+0x60/0x60
[ 186.758829][ C0] rcu_gp_kthread+0x9b2/0x18c0
[ 186.763580][ C0] ? rcu_barrier+0x310/0x310
[ 186.768159][ C0] ? trace_hardirqs_on+0x67/0x240
[ 186.773171][ C0] ? __kasan_check_read+0x11/0x20
[ 186.778179][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[ 186.784413][ C0] ? __kthread_parkme+0x108/0x1c0
[ 186.789418][ C0] ? __kasan_check_read+0x11/0x20
[ 186.794425][ C0] kthread+0x361/0x430
[ 186.798493][ C0] ? rcu_barrier+0x310/0x310
[ 186.803064][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20
[ 186.809284][ C0] ret_from_fork+0x24/0x30
[ 186.813719][ C0] NMI backtrace for cpu 0
[ 186.818031][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.3.0-rc7+ #0
[ 186.825125][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 186.835167][ C0] Call Trace:
[ 186.838441][ C0]
[ 186.841276][ C0] dump_stack+0x172/0x1f0
[ 186.845589][ C0] nmi_cpu_backtrace.cold+0x70/0xb2
[ 186.850774][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 186.856999][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45
[ 186.862620][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b
[ 186.868584][ C0] arch_trigger_cpumask_backtrace+0x14/0x20
[ 186.874467][ C0] rcu_dump_cpu_stacks+0x183/0x1cf
[ 186.879561][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13
[ 186.885088][ C0] ? raise_softirq+0x138/0x340
[ 186.889836][ C0] update_process_times+0x32/0x80
[ 186.894843][ C0] tick_sched_handle+0xa2/0x190
[ 186.899674][ C0] tick_sched_timer+0x53/0x140
[ 186.904420][ C0] __hrtimer_run_queues+0x364/0xe40
[ 186.909599][ C0] ? tick_sched_do_timer+0x1b0/0x1b0
[ 186.914865][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0
[ 186.920392][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20
[ 186.926091][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440
[ 186.932142][ C0] hrtimer_interrupt+0x314/0x770
[ 186.937071][ C0] smp_apic_timer_interrupt+0x160/0x610
[ 186.942597][ C0] apic_timer_interrupt+0xf/0x20
[ 186.947517][ C0] RIP: 0010:__list_del_entry_valid+0xa/0xf5
[ 186.953397][ C0] Code: 89 75 e8 e8 c8 52 6e fe 48 8b 75 e8 eb 9f 48 89 f7 48 89 75 e8 e8 b6 52 6e fe 48 8b 75 e8 eb b2 48 b8 00 00 00 00 00 fc ff df <55> 48 89 e5 41 56 49 89 fe 48 83 c7 08 48 89 fa 41 55 48 c1 ea 03
[ 186.972981][ C0] RSP: 0018:ffff8880ae8095c0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
[ 186.981377][ C0] RAX: dffffc0000000000 RBX: ffff88808bf502f8 RCX: ffffffff85c7df19
[ 186.989340][ C0] RDX: 0000000000000000 RSI: ffffffff85c7e3e6 RDI: ffff88808bf502f8
[ 186.997399][ C0] RBP: ffff8880ae809618 R08: ffffffff88e7a1c0 R09: fffffbfff14e9755
[ 187.005368][ C0] R10: ffffffff88e7ab18 R11: ffffffff88e7a1c0 R12: dffffc0000000000
[ 187.013322][ C0] R13: ffff88808bf50000 R14: 0000000000000000 R15: 0000000000000000
[ 187.021291][ C0] ? apic_timer_interrupt+0xa/0x20
[ 187.026398][ C0] ? hhf_dequeue+0xb9/0xa20
[ 187.030882][ C0] ? hhf_dequeue+0x586/0xa20
[ 187.035455][ C0] ? hhf_dequeue+0x5c5/0xa20
[ 187.040042][ C0] __qdisc_run+0x1e7/0x19d0
[ 187.044530][ C0] ? dev_queue_xmit+0x18/0x20
[ 187.049196][ C0] __dev_queue_xmit+0x16f1/0x3650
[ 187.054204][ C0] ? __kasan_check_read+0x11/0x20
[ 187.059211][ C0] ? __lock_acquire+0x1702/0x4c30
[ 187.064231][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0
[ 187.069500][ C0] ? __kasan_check_read+0x11/0x20
[ 187.074502][ C0] ? mark_lock+0xc0/0x11e0
[ 187.078905][ C0] ? mark_held_locks+0xa4/0xf0
[ 187.083660][ C0] ? ip6_finish_output2+0xc40/0x2520
[ 187.088926][ C0] ? __ip6_finish_output+0x444/0xa50
[ 187.094190][ C0] ? ip6_finish_output2+0xc40/0x2520
[ 187.099459][ C0] dev_queue_xmit+0x18/0x20
[ 187.103941][ C0] ? dev_queue_xmit+0x18/0x20
[ 187.108599][ C0] ip6_finish_output2+0xf58/0x2520
[ 187.113698][ C0] ? ip6_forward_finish+0x530/0x530
[ 187.118881][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 187.125111][ C0] ? __kasan_check_read+0x11/0x20
[ 187.130129][ C0] __ip6_finish_output+0x444/0xa50
[ 187.135219][ C0] ? __ip6_finish_output+0x444/0xa50
[ 187.140485][ C0] ip6_finish_output+0x38/0x1f0
[ 187.145318][ C0] ip6_output+0x235/0x7c0
[ 187.149631][ C0] ? ip6_finish_output+0x1f0/0x1f0
[ 187.154724][ C0] ? __ip6_finish_output+0xa50/0xa50
[ 187.159993][ C0] ? icmp6_dst_alloc+0x432/0x660
[ 187.164916][ C0] mld_sendpack+0x9c7/0xea0
[ 187.169405][ C0] ? nf_hook.constprop.0+0x560/0x560
[ 187.175631][ C0] ? mld_ifc_timer_expire+0x437/0x8a0
[ 187.180992][ C0] ? __local_bh_enable_ip+0x15a/0x270
[ 187.186345][ C0] mld_ifc_timer_expire+0x449/0x8a0
[ 187.191537][ C0] call_timer_fn+0x1ac/0x780
[ 187.196107][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0
[ 187.201461][ C0] ? msleep_interruptible+0x150/0x150
[ 187.206813][ C0] ? run_timer_softirq+0x685/0x17a0
[ 187.211999][ C0] ? trace_hardirqs_on+0x67/0x240
[ 187.217011][ C0] ? __kasan_check_read+0x11/0x20
[ 187.222016][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0
[ 187.227378][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0
[ 187.232740][ C0] run_timer_softirq+0x697/0x17a0
[ 187.237751][ C0] ? add_timer+0x930/0x930
[ 187.242147][ C0] ? kvm_clock_read+0x18/0x30
[ 187.246800][ C0] ? kvm_sched_clock_read+0x9/0x20
[ 187.251890][ C0] ? sched_clock+0x2e/0x50
[ 187.256296][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 187.262516][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 187.268752][ C0] __do_softirq+0x262/0x98c
[ 187.273246][ C0] ? sched_clock_cpu+0x1b/0x1b0
[ 187.278086][ C0] irq_exit+0x19b/0x1e0
[ 187.282225][ C0] smp_apic_timer_interrupt+0x1a3/0x610
[ 187.287754][ C0] apic_timer_interrupt+0xf/0x20
[ 187.292664][ C0]
[ 187.295584][ C0] RIP: 0010:native_safe_halt+0xe/0x10
[ 187.300952][ C0] Code: b8 af 6b fa eb 8a 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d f4 35 67 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d e4 35 67 00 fb f4 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 1e 4e 1f fa e8 e9
[ 187.320534][ C0] RSP: 0018:ffffffff88e07ce8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 187.328925][ C0] RAX: 1ffffffff11e5e8d RBX: ffffffff88e7a1c0 RCX: 0000000000000000
[ 187.338092][ C0] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffffffff88e7aa4c
[ 187.346065][ C0] RBP: ffffffff88e07d18 R08: ffffffff88e7a1c0 R09: 0000000000000000
[ 187.354015][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
[ 187.361964][ C0] R13: ffffffff89c5ab78 R14: 0000000000000000 R15: 0000000000000000
[ 187.369930][ C0] ? default_idle+0x4e/0x360
[ 187.374518][ C0] arch_cpu_idle+0xa/0x10
[ 187.378831][ C0] default_idle_call+0x84/0xb0
[ 187.383590][ C0] do_idle+0x413/0x760
[ 187.387644][ C0] ? arch_cpu_idle_exit+0x80/0x80
[ 187.392649][ C0] ? trace_hardirqs_on+0x67/0x240
[ 187.397656][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 187.403887][ C0] ? debug_smp_processor_id+0x3c/0x214
[ 187.409332][ C0] cpu_startup_entry+0x1b/0x20
[ 187.414078][ C0] rest_init+0x245/0x37b
[ 187.418315][ C0] arch_call_rest_init+0xe/0x1b
[ 187.423146][ C0] start_kernel+0x912/0x951
[ 187.427638][ C0] ? mem_encrypt_init+0xb/0xb
[ 187.432309][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 187.438529][ C0] ? x86_family+0x41/0x50
[ 187.442837][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[ 187.449063][ C0] x86_64_start_reservations+0x29/0x2b
[ 187.454500][ C0] x86_64_start_kernel+0x77/0x7b
[ 187.459419][ C0] secondary_startup_64+0xa4/0xb0