[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 60.092179][ T26] audit: type=1800 audit(1568425841.048:25): pid=8558 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0
[ 60.128211][ T26] audit: type=1800 audit(1568425841.048:26): pid=8558 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0
[ 60.169677][ T26] audit: type=1800 audit(1568425841.048:27): pid=8558 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 '10.128.0.46' (ECDSA) to the list of known hosts.
syzkaller login: [ 234.589077][ T8713] IPVS: ftp: loaded support on port[0] = 21
[ 234.662615][ T8713] chnl_net:caif_netlink_parms(): no params data found
[ 234.690014][ T8713] bridge0: port 1(bridge_slave_0) entered blocking state
[ 234.698709][ T8713] bridge0: port 1(bridge_slave_0) entered disabled state
[ 234.706659][ T8713] device bridge_slave_0 entered promiscuous mode
[ 234.715284][ T8713] bridge0: port 2(bridge_slave_1) entered blocking state
[ 234.722636][ T8713] bridge0: port 2(bridge_slave_1) entered disabled state
[ 234.730291][ T8713] device bridge_slave_1 entered promiscuous mode
[ 234.746775][ T8713] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[ 234.757730][ T8713] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[ 234.777502][ T8713] team0: Port device team_slave_0 added
[ 234.784697][ T8713] team0: Port device team_slave_1 added
[ 234.843421][ T8713] device hsr_slave_0 entered promiscuous mode
[ 234.881258][ T8713] device hsr_slave_1 entered promiscuous mode
[ 234.929012][ T8713] bridge0: port 2(bridge_slave_1) entered blocking state
[ 234.936358][ T8713] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 234.944318][ T8713] bridge0: port 1(bridge_slave_0) entered blocking state
[ 234.951468][ T8713] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 234.985091][ T8713] 8021q: adding VLAN 0 to HW filter on device bond0
[ 234.998486][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[ 235.019152][ T22] bridge0: port 1(bridge_slave_0) entered disabled state
[ 235.028037][ T22] bridge0: port 2(bridge_slave_1) entered disabled state
[ 235.037279][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready
[ 235.048993][ T8713] 8021q: adding VLAN 0 to HW filter on device team0
[ 235.059388][ T3003] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready
[ 235.068552][ T3003] bridge0: port 1(bridge_slave_0) entered blocking state
[ 235.075850][ T3003] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 235.092268][ T8715] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready
[ 235.101984][ T8715] bridge0: port 2(bridge_slave_1) entered blocking state
[ 235.109517][ T8715] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 235.119900][ T3003] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready
[ 235.129528][ T3003] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
[ 235.148219][ T8713] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network
[ 235.159350][ T8713] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network
[ 235.172930][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready
[ 235.182581][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready
executing program
[ 235.191691][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
[ 235.200341][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
[ 235.218331][ T8713] 8021q: adding VLAN 0 to HW filter on device batadv0
[ 340.360865][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU
[ 340.367680][ C1] rcu: 1-...!: (10500 ticks this GP) idle=28a/0/0x3 softirq=9590/9590 fqs=0
[ 340.376659][ C1] (t=10500 jiffies g=7113 q=46)
[ 340.381638][ C1] rcu: rcu_preempt kthread starved for 10500 jiffies! g7113 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
[ 340.392899][ C1] rcu: RCU grace-period kthread stack dump:
[ 340.398862][ C1] rcu_preempt I29112 10 2 0x80004000
[ 340.405180][ C1] Call Trace:
[ 340.408549][ C1] __schedule+0x755/0x1580
[ 340.412958][ C1] ? __sched_text_start+0x8/0x8
[ 340.417803][ C1] ? _raw_spin_unlock_irqrestore+0x6b/0xe0
[ 340.423596][ C1] ? schedule_timeout+0x47c/0xc50
[ 340.428604][ C1] ? lockdep_hardirqs_on+0x418/0x5d0
[ 340.433876][ C1] schedule+0xd9/0x260
[ 340.437932][ C1] schedule_timeout+0x486/0xc50
[ 340.442766][ C1] ? _raw_spin_unlock_irqrestore+0x6b/0xe0
[ 340.448572][ C1] ? usleep_range+0x170/0x170
[ 340.453232][ C1] ? trace_hardirqs_on+0x67/0x240
[ 340.458244][ C1] ? __kasan_check_read+0x11/0x20
[ 340.463270][ C1] ? __next_timer_interrupt+0x1a0/0x1a0
[ 340.468802][ C1] ? swake_up_one+0x60/0x60
[ 340.473291][ C1] rcu_gp_kthread+0x9b2/0x18c0
[ 340.478051][ C1] ? rcu_barrier+0x310/0x310
[ 340.482623][ C1] ? trace_hardirqs_on+0x67/0x240
[ 340.487632][ C1] ? __kasan_check_read+0x11/0x20
[ 340.492642][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[ 340.498875][ C1] ? __kthread_parkme+0x108/0x1c0
[ 340.503882][ C1] ? __kasan_check_read+0x11/0x20
[ 340.508892][ C1] kthread+0x361/0x430
[ 340.512945][ C1] ? rcu_barrier+0x310/0x310
[ 340.517522][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20
[ 340.524277][ C1] ret_from_fork+0x24/0x30
[ 340.528708][ C1] NMI backtrace for cpu 1
[ 340.533027][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0-rc7+ #0
[ 340.540113][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 340.550157][ C1] Call Trace:
[ 340.553421][ C1]
[ 340.557634][ C1] dump_stack+0x172/0x1f0
[ 340.561954][ C1] nmi_cpu_backtrace.cold+0x70/0xb2
[ 340.567134][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 340.573362][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45
[ 340.578977][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b
[ 340.585381][ C1] arch_trigger_cpumask_backtrace+0x14/0x20
[ 340.591272][ C1] rcu_dump_cpu_stacks+0x183/0x1cf
[ 340.596372][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13
[ 340.601903][ C1] ? raise_softirq+0x138/0x340
[ 340.606669][ C1] update_process_times+0x32/0x80
[ 340.611700][ C1] tick_sched_handle+0xa2/0x190
[ 340.616534][ C1] tick_sched_timer+0x53/0x140
[ 340.621291][ C1] __hrtimer_run_queues+0x364/0xe40
[ 340.626477][ C1] ? tick_sched_do_timer+0x1b0/0x1b0
[ 340.631837][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0
[ 340.637374][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20
[ 340.643162][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440
[ 340.649219][ C1] hrtimer_interrupt+0x314/0x770
[ 340.654201][ C1] smp_apic_timer_interrupt+0x160/0x610
[ 340.659733][ C1] apic_timer_interrupt+0xf/0x20
[ 340.664965][ C1] RIP: 0010:hhf_dequeue+0x51/0xa20
[ 340.670066][ C1] Code: 03 00 00 48 89 45 d0 48 c1 e8 03 4c 01 e0 48 89 45 c0 49 8d 85 90 03 00 00 48 89 45 c8 48 c1 e8 03 48 89 45 b8 e8 ff 99 aa fb <48> 8b 45 c0 80 38 00 0f 85 a8 07 00 00 48 8b 75 d0 49 8b 85 80 03
[ 340.689661][ C1] RSP: 0018:ffff8880ae909038 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13
[ 340.698054][ C1] RAX: ffff8880a98d8340 RBX: ffff8880a92e3df8 RCX: ffffffff85c7e179
[ 340.706027][ C1] RDX: 0000000000000100 RSI: ffffffff85c7db51 RDI: ffff8880a92e3e00
[ 340.713980][ C1] RBP: ffff8880ae909088 R08: ffff8880a98d8340 R09: fffffbfff14e9755
[ 340.721935][ C1] R10: ffff8880a98d8cc0 R11: ffff8880a98d8340 R12: dffffc0000000000
[ 340.729890][ C1] R13: ffff8880a92e3b00 R14: ffff8880a92e3e98 R15: ffff8880a92e3e90
[ 340.737868][ C1] ? apic_timer_interrupt+0xa/0x20
[ 340.742969][ C1] ? hhf_dequeue+0x679/0xa20
[ 340.747558][ C1] ? hhf_dequeue+0x51/0xa20
[ 340.752055][ C1] ? hhf_dequeue+0x51/0xa20
[ 340.756599][ C1] __qdisc_run+0x1e7/0x19d0
[ 340.761126][ C1] ? dev_queue_xmit+0x18/0x20
[ 340.765797][ C1] __dev_queue_xmit+0x16f1/0x3650
[ 340.770818][ C1] ? __local_bh_enable_ip+0x15a/0x270
[ 340.776182][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0
[ 340.781458][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[ 340.787811][ C1] ? br_nf_post_routing+0xd73/0x1d30
[ 340.793122][ C1] ? br_forward_finish+0x235/0x400
[ 340.798221][ C1] ? find_held_lock+0x35/0x130
[ 340.802974][ C1] ? br_forward_finish+0x235/0x400
[ 340.808086][ C1] dev_queue_xmit+0x18/0x20
[ 340.812574][ C1] ? dev_queue_xmit+0x18/0x20
[ 340.817320][ C1] br_dev_queue_push_xmit+0x3f3/0x5c0
[ 340.822671][ C1] ? __kasan_check_read+0x11/0x20
[ 340.827682][ C1] br_forward_finish+0xfa/0x400
[ 340.832524][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0
[ 340.838054][ C1] ? br_fdb_add.cold+0x8c/0x8c
[ 340.842821][ C1] ? __kasan_check_read+0x11/0x20
[ 340.847833][ C1] __br_forward+0x641/0xb00
[ 340.852320][ C1] ? br_forward_finish+0x400/0x400
[ 340.857414][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0
[ 340.862949][ C1] deliver_clone+0x61/0xc0
[ 340.867350][ C1] maybe_deliver+0x2c7/0x390
[ 340.871925][ C1] br_flood+0x13a/0x3d0
[ 340.876071][ C1] br_dev_xmit+0x98c/0x15a0
[ 340.880561][ C1] ? br_poll_controller+0x10/0x10
[ 340.885829][ C1] ? netif_skb_features+0x6c2/0xb90
[ 340.891029][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 340.897273][ C1] dev_hard_start_xmit+0x1a3/0x9c0
[ 340.902374][ C1] __dev_queue_xmit+0x2b15/0x3650
[ 340.907378][ C1] ? __kasan_check_read+0x11/0x20
[ 340.912396][ C1] ? __lock_acquire+0x2b42/0x4c30
[ 340.917415][ C1] ? __lock_acquire+0x8a2/0x4c30
[ 340.922357][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0
[ 340.927628][ C1] ? __kasan_check_read+0x11/0x20
[ 340.932634][ C1] ? mark_lock+0xc0/0x11e0
[ 340.937048][ C1] ? mark_held_locks+0xa4/0xf0
[ 340.941873][ C1] ? ip_finish_output2+0x13e2/0x2570
[ 340.947234][ C1] ? __ip_finish_output+0x5fc/0xb90
[ 340.952414][ C1] ? ip_finish_output2+0x13e2/0x2570
[ 340.957689][ C1] dev_queue_xmit+0x18/0x20
[ 340.962179][ C1] ? dev_queue_xmit+0x18/0x20
[ 340.966837][ C1] ip_finish_output2+0x1726/0x2570
[ 340.971986][ C1] ? nf_ct_deliver_cached_events+0x23d/0x6e0
[ 340.977954][ C1] ? ip_frag_next+0x910/0x910
[ 340.982619][ C1] __ip_finish_output+0x5fc/0xb90
[ 340.987623][ C1] ? __ip_finish_output+0x5fc/0xb90
[ 340.992803][ C1] ? audit_alloc_mark+0x3d0/0x500
[ 340.997827][ C1] ip_finish_output+0x38/0x1f0
[ 341.002595][ C1] ip_output+0x21f/0x640
[ 341.006823][ C1] ? ip_mc_output+0xf40/0xf40
[ 341.011486][ C1] ? __ip_finish_output+0xb90/0xb90
[ 341.016676][ C1] ip_local_out+0xbb/0x190
[ 341.022569][ C1] igmpv3_sendpack+0x1b5/0x2c0
[ 341.027320][ C1] igmp_ifc_timer_expire+0x687/0xa00
[ 341.032597][ C1] call_timer_fn+0x1ac/0x780
[ 341.037171][ C1] ? __ip_mc_dec_group+0x520/0x520
[ 341.042265][ C1] ? msleep_interruptible+0x150/0x150
[ 341.047624][ C1] ? run_timer_softirq+0x685/0x17a0
[ 341.052815][ C1] ? trace_hardirqs_on+0x67/0x240
[ 341.057840][ C1] ? __kasan_check_read+0x11/0x20
[ 341.062846][ C1] ? __ip_mc_dec_group+0x520/0x520
[ 341.067939][ C1] ? __ip_mc_dec_group+0x520/0x520
[ 341.073038][ C1] run_timer_softirq+0x697/0x17a0
[ 341.078062][ C1] ? add_timer+0x930/0x930
[ 341.082475][ C1] ? kvm_clock_read+0x18/0x30
[ 341.088094][ C1] ? kvm_sched_clock_read+0x9/0x20
[ 341.093187][ C1] ? sched_clock+0x2e/0x50
[ 341.097601][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 341.104171][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 341.110402][ C1] __do_softirq+0x262/0x98c
[ 341.114887][ C1] ? sched_clock_cpu+0x1b/0x1b0
[ 341.119726][ C1] irq_exit+0x19b/0x1e0
[ 341.123863][ C1] smp_apic_timer_interrupt+0x1a3/0x610
[ 341.129393][ C1] apic_timer_interrupt+0xf/0x20
[ 341.134310][ C1]
[ 341.137233][ C1] RIP: 0010:native_safe_halt+0xe/0x10
[ 341.142589][ C1] Code: 38 b3 6b fa eb 8a 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 74 39 67 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 64 39 67 00 fb f4 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 9e 51 1f fa e8 69
[ 341.162610][ C1] RSP: 0018:ffff8880a98e7d68 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
[ 341.171003][ C1] RAX: 1ffffffff11e5e8d RBX: ffff8880a98d8340 RCX: 0000000000000000
[ 341.178955][ C1] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff8880a98d8bcc
[ 341.187439][ C1] RBP: ffff8880a98e7d98 R08: ffff8880a98d8340 R09: 0000000000000000
[ 341.195480][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
[ 341.203436][ C1] R13: ffffffff89c5ab78 R14: 0000000000000000 R15: 0000000000000001
[ 341.211438][ C1] ? default_idle+0x4e/0x360
[ 341.216035][ C1] arch_cpu_idle+0xa/0x10
[ 341.220348][ C1] default_idle_call+0x84/0xb0
[ 341.225186][ C1] do_idle+0x413/0x760
[ 341.229262][ C1] ? arch_cpu_idle_exit+0x80/0x80
[ 341.234291][ C1] cpu_startup_entry+0x1b/0x20
[ 341.239037][ C1] start_secondary+0x315/0x430
[ 341.243784][ C1] ? set_cpu_sibling_map+0x2180/0x2180
[ 341.249237][ C1] secondary_startup_64+0xa4/0xb0