[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 56.407055][ T26] audit: type=1800 audit(1568481312.283:25): pid=8520 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0
[ 56.452157][ T26] audit: type=1800 audit(1568481312.283:26): pid=8520 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0
[ 56.490341][ T26] audit: type=1800 audit(1568481312.283:27): pid=8520 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 '10.128.0.241' (ECDSA) to the list of known hosts.
syzkaller login: [ 229.359057][ T8678] IPVS: ftp: loaded support on port[0] = 21
[ 229.421532][ T8678] chnl_net:caif_netlink_parms(): no params data found
[ 229.450180][ T8678] bridge0: port 1(bridge_slave_0) entered blocking state
[ 229.457999][ T8678] bridge0: port 1(bridge_slave_0) entered disabled state
[ 229.465892][ T8678] device bridge_slave_0 entered promiscuous mode
[ 229.473989][ T8678] bridge0: port 2(bridge_slave_1) entered blocking state
[ 229.481369][ T8678] bridge0: port 2(bridge_slave_1) entered disabled state
[ 229.489178][ T8678] device bridge_slave_1 entered promiscuous mode
[ 229.505656][ T8678] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[ 229.516359][ T8678] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[ 229.534740][ T8678] team0: Port device team_slave_0 added
[ 229.541861][ T8678] team0: Port device team_slave_1 added
[ 229.596371][ T8678] device hsr_slave_0 entered promiscuous mode
[ 229.634155][ T8678] device hsr_slave_1 entered promiscuous mode
[ 229.682383][ T8678] bridge0: port 2(bridge_slave_1) entered blocking state
[ 229.689726][ T8678] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 229.697652][ T8678] bridge0: port 1(bridge_slave_0) entered blocking state
[ 229.705072][ T8678] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 229.737622][ T8678] 8021q: adding VLAN 0 to HW filter on device bond0
[ 229.751069][ T2998] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[ 229.771765][ T2998] bridge0: port 1(bridge_slave_0) entered disabled state
[ 229.780636][ T2998] bridge0: port 2(bridge_slave_1) entered disabled state
[ 229.789545][ T2998] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready
[ 229.801187][ T8678] 8021q: adding VLAN 0 to HW filter on device team0
[ 229.811355][ T3719] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready
[ 229.820197][ T3719] bridge0: port 1(bridge_slave_0) entered blocking state
[ 229.827276][ T3719] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 229.838618][ T2998] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready
[ 229.847611][ T2998] bridge0: port 2(bridge_slave_1) entered blocking state
[ 229.855007][ T2998] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 229.876093][ T2998] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready
[ 229.885953][ T2998] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready
[ 229.894514][ T2998] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready
[ 229.903022][ T2998] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
[ 229.915650][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
[ 229.925932][ T8678] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
executing program
[ 229.942921][ T8678] 8021q: adding VLAN 0 to HW filter on device batadv0
[ 335.023682][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU
[ 335.030431][ C0] rcu: 0-...!: (1 GPs behind) idle=2fe/0/0x3 softirq=9175/9176 fqs=33
[ 335.038859][ C0] (t=10500 jiffies g=7065 q=44)
[ 335.043779][ C0] rcu: rcu_preempt kthread starved for 10434 jiffies! g7065 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
[ 335.055034][ C0] rcu: RCU grace-period kthread stack dump:
[ 335.060903][ C0] rcu_preempt I29552 10 2 0x80004000
[ 335.067231][ C0] Call Trace:
[ 335.070593][ C0] __schedule+0x76e/0x17a0
[ 335.074996][ C0] ? __sched_text_start+0x8/0x8
[ 335.079830][ C0] ? _raw_spin_unlock_irqrestore+0x6b/0xe0
[ 335.085702][ C0] ? schedule_timeout+0x47c/0xc50
[ 335.090719][ C0] ? lockdep_hardirqs_on+0x418/0x5d0
[ 335.095988][ C0] schedule+0xd9/0x260
[ 335.100041][ C0] schedule_timeout+0x486/0xc50
[ 335.104885][ C0] ? _raw_spin_unlock_irqrestore+0x6b/0xe0
[ 335.110700][ C0] ? usleep_range+0x170/0x170
[ 335.115371][ C0] ? trace_hardirqs_on+0x67/0x240
[ 335.120387][ C0] ? __kasan_check_read+0x11/0x20
[ 335.125406][ C0] ? __next_timer_interrupt+0x1a0/0x1a0
[ 335.130941][ C0] ? swake_up_one+0x60/0x60
[ 335.135441][ C0] rcu_gp_kthread+0x9b2/0x18d0
[ 335.140193][ C0] ? invoke_rcu_core+0x230/0x230
[ 335.145112][ C0] ? trace_hardirqs_on+0x67/0x240
[ 335.150117][ C0] ? __kasan_check_read+0x11/0x20
[ 335.155127][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[ 335.161356][ C0] ? __kthread_parkme+0x108/0x1c0
[ 335.166358][ C0] ? __kasan_check_read+0x11/0x20
[ 335.171366][ C0] kthread+0x361/0x430
[ 335.175417][ C0] ? invoke_rcu_core+0x230/0x230
[ 335.180336][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20
[ 335.186569][ C0] ret_from_fork+0x24/0x30
[ 335.191006][ C0] NMI backtrace for cpu 0
[ 335.195324][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.3.0-rc6-next-20190830 #75
[ 335.203710][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 335.213916][ C0] Call Trace:
[ 335.217182][ C0]
[ 335.220076][ C0] dump_stack+0x172/0x1f0
[ 335.224395][ C0] nmi_cpu_backtrace.cold+0x70/0xb2
[ 335.229575][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 335.235807][ C0] ? lapic_can_unplug_cpu.cold+0x3a/0x3a
[ 335.241449][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b
[ 335.247417][ C0] arch_trigger_cpumask_backtrace+0x14/0x20
[ 335.253301][ C0] rcu_dump_cpu_stacks+0x183/0x1cf
[ 335.258398][ C0] rcu_sched_clock_irq.cold+0x4fd/0xc12
[ 335.263926][ C0] ? raise_softirq+0x138/0x340
[ 335.268675][ C0] update_process_times+0x2d/0x70
[ 335.273700][ C0] tick_sched_handle+0xa2/0x190
[ 335.278556][ C0] tick_sched_timer+0x53/0x140
[ 335.283325][ C0] __hrtimer_run_queues+0x364/0xe40
[ 335.288523][ C0] ? tick_sched_do_timer+0x1b0/0x1b0
[ 335.293799][ C0] ? hrtimer_sleeper_start_expires+0x90/0x90
[ 335.299765][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20
[ 335.305467][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440
[ 335.311528][ C0] hrtimer_interrupt+0x314/0x770
[ 335.316457][ C0] smp_apic_timer_interrupt+0x160/0x610
[ 335.321985][ C0] apic_timer_interrupt+0xf/0x20
[ 335.326903][ C0] RIP: 0010:__list_del_entry_valid+0xc7/0xf5
[ 335.332878][ C0] Code: b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 75 24 49 8b 55 08 4c 39 f2 0f 85 aa 00 00 00 41 5c b8 01 00 00 00 <41> 5d 41 5e 5d c3 e8 de 70 6a fe e9 55 ff ff ff e8 d4 70 6a fe eb
[ 335.352462][ C0] RSP: 0018:ffff8880ae808f08 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
[ 335.360854][ C0] RAX: 0000000000000001 RBX: ffff88809fabe2f8 RCX: ffffffff85cb69b9
[ 335.368808][ C0] RDX: ffff88809fabe2f8 RSI: ffffffff85cb6e86 RDI: ffff88809fabe398
[ 335.376769][ C0] RBP: ffff8880ae808f18 R08: ffffffff88e7a180 R09: fffffbfff14ed341
[ 335.384724][ C0] R10: ffffffff88e7ab38 R11: ffffffff88e7a180 R12: dffffc0000000000
[ 335.392676][ C0] R13: ffff88809fabe390 R14: ffff88809fabe2f8 R15: 0000000000000000
[ 335.400655][ C0] ? apic_timer_interrupt+0xa/0x20
[ 335.405839][ C0] ? hhf_dequeue+0xb9/0xa20
[ 335.410355][ C0] ? hhf_dequeue+0x586/0xa20
[ 335.414949][ C0] hhf_dequeue+0x5c5/0xa20
[ 335.419418][ C0] __qdisc_run+0x1e7/0x19d0
[ 335.423925][ C0] ? dev_queue_xmit+0x18/0x20
[ 335.428599][ C0] __dev_queue_xmit+0x16f1/0x37c0
[ 335.433618][ C0] ? rcu_lockdep_current_cpu_online+0xe3/0x130
[ 335.439779][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0
[ 335.445062][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[ 335.451373][ C0] ? br_nf_post_routing+0xd73/0x1d30
[ 335.456708][ C0] ? br_forward_finish+0x235/0x400
[ 335.461826][ C0] ? find_held_lock+0x35/0x130
[ 335.466574][ C0] ? br_forward_finish+0x235/0x400
[ 335.471679][ C0] dev_queue_xmit+0x18/0x20
[ 335.476167][ C0] ? dev_queue_xmit+0x18/0x20
[ 335.480845][ C0] br_dev_queue_push_xmit+0x3f3/0x5e0
[ 335.486200][ C0] ? __kasan_check_read+0x11/0x20
[ 335.491209][ C0] br_forward_finish+0xfa/0x400
[ 335.496044][ C0] ? br_dev_queue_push_xmit+0x5e0/0x5e0
[ 335.501575][ C0] ? br_fdb_add.cold+0x83/0x83
[ 335.506318][ C0] ? __kasan_check_read+0x11/0x20
[ 335.511337][ C0] __br_forward+0x641/0xb00
[ 335.515824][ C0] ? br_forward_finish+0x400/0x400
[ 335.520921][ C0] ? br_dev_queue_push_xmit+0x5e0/0x5e0
[ 335.526471][ C0] deliver_clone+0x61/0xc0
[ 335.530881][ C0] maybe_deliver+0x2c7/0x390
[ 335.535458][ C0] br_flood+0x13a/0x3d0
[ 335.539604][ C0] br_dev_xmit+0x98c/0x15a0
[ 335.544096][ C0] ? br_poll_controller+0x10/0x10
[ 335.549107][ C0] ? rcu_lockdep_current_cpu_online+0xe3/0x130
[ 335.555248][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0
[ 335.560775][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50
[ 335.566740][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 335.572991][ C0] dev_hard_start_xmit+0x1a3/0x9c0
[ 335.578085][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 335.584310][ C0] __dev_queue_xmit+0x2b82/0x37c0
[ 335.589317][ C0] ? __kasan_check_read+0x11/0x20
[ 335.594322][ C0] ? __lock_acquire+0x16f2/0x4a00
[ 335.599334][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0
[ 335.604602][ C0] ? __kasan_check_read+0x11/0x20
[ 335.609616][ C0] ? mark_lock+0xc2/0x1220
[ 335.614018][ C0] ? mark_held_locks+0xa4/0xf0
[ 335.618880][ C0] ? ip6_finish_output2+0xc40/0x2550
[ 335.624149][ C0] ? __ip6_finish_output+0x444/0xaa0
[ 335.629425][ C0] ? ip6_finish_output2+0xc40/0x2550
[ 335.634696][ C0] dev_queue_xmit+0x18/0x20
[ 335.639179][ C0] ? dev_queue_xmit+0x18/0x20
[ 335.643836][ C0] ip6_finish_output2+0xf58/0x2550
[ 335.648946][ C0] ? ip6_forward_finish+0x570/0x570
[ 335.654134][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 335.660377][ C0] ? __kasan_check_read+0x11/0x20
[ 335.665405][ C0] __ip6_finish_output+0x444/0xaa0
[ 335.670508][ C0] ? __ip6_finish_output+0x444/0xaa0
[ 335.675783][ C0] ip6_finish_output+0x38/0x1f0
[ 335.680621][ C0] ip6_output+0x235/0x7f0
[ 335.684935][ C0] ? ip6_finish_output+0x1f0/0x1f0
[ 335.690040][ C0] ? __ip6_finish_output+0xaa0/0xaa0
[ 335.695372][ C0] ? icmp6_dst_alloc+0x432/0x660
[ 335.700297][ C0] mld_sendpack+0x9c7/0xed0
[ 335.704914][ C0] ? nf_hook.constprop.0+0x560/0x560
[ 335.710272][ C0] ? mld_ifc_timer_expire+0x437/0x8a0
[ 335.715635][ C0] ? __local_bh_enable_ip+0x15a/0x270
[ 335.721036][ C0] mld_ifc_timer_expire+0x449/0x8a0
[ 335.726218][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0
[ 335.731754][ C0] call_timer_fn+0x1ac/0x780
[ 335.736325][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0
[ 335.741676][ C0] ? msleep_interruptible+0x150/0x150
[ 335.747031][ C0] ? run_timer_softirq+0x6ae/0x17f0
[ 335.752221][ C0] ? trace_hardirqs_on+0x67/0x240
[ 335.757236][ C0] ? __kasan_check_read+0x11/0x20
[ 335.762241][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0
[ 335.767592][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0
[ 335.772945][ C0] run_timer_softirq+0x6c0/0x17f0
[ 335.777957][ C0] ? add_timer+0x930/0x930
[ 335.782358][ C0] ? rcu_lockdep_current_cpu_online+0xe3/0x130
[ 335.788496][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0
[ 335.794025][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50
[ 335.799990][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 335.806211][ C0] __do_softirq+0x262/0x98c
[ 335.810694][ C0] ? sched_clock_cpu+0x1b/0x1b0
[ 335.815537][ C0] irq_exit+0x19b/0x1e0
[ 335.819684][ C0] smp_apic_timer_interrupt+0x1a3/0x610
[ 335.825210][ C0] apic_timer_interrupt+0xf/0x20
[ 335.830121][ C0]
[ 335.833041][ C0] RIP: 0010:native_safe_halt+0xe/0x10
[ 335.838404][ C0] Code: 38 c1 69 fa eb 8a 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 64 b8 64 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 54 b8 64 00 fb f4 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 5e a7 1c fa e8 69
[ 335.857990][ C0] RSP: 0018:ffffffff88e07c50 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
[ 335.866392][ C0] RAX: 1ffffffff11e5db7 RBX: 0000000000000000 RCX: 0000000000000000
[ 335.874344][ C0] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffffffff88e7aa1c
[ 335.882294][ C0] RBP: ffffffff88e07c80 R08: ffffffff88e7a180 R09: 0000000000000000
[ 335.890249][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
[ 335.898201][ C0] R13: 0000000000000000 R14: 0000000000000060 R15: 0000000000000001
[ 335.906170][ C0] ? default_idle+0x4e/0x360
[ 335.910857][ C0] default_enter_idle+0x71/0xf0
[ 335.915690][ C0] cpuidle_enter_state+0xef/0xfb0
[ 335.920705][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 335.926928][ C0] cpuidle_enter+0x4f/0xa0
[ 335.931327][ C0] do_idle+0x45f/0x6e0
[ 335.935387][ C0] ? arch_cpu_idle_exit+0x80/0x80
[ 335.940391][ C0] ? trace_hardirqs_on+0x30/0x240
[ 335.945398][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 335.951794][ C0] ? debug_smp_processor_id+0x3c/0x214
[ 335.957237][ C0] cpu_startup_entry+0x1b/0x20
[ 335.961985][ C0] rest_init+0x245/0x37b
[ 335.966260][ C0] arch_call_rest_init+0xe/0x1b
[ 335.971118][ C0] start_kernel+0x904/0x943
[ 335.975602][ C0] ? mem_encrypt_init+0xb/0xb
[ 335.980271][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 335.986507][ C0] ? x86_family+0x41/0x50
[ 335.990829][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[ 335.997054][ C0] x86_64_start_reservations+0x29/0x2b
[ 336.002493][ C0] x86_64_start_kernel+0x77/0x7b
[ 336.007412][ C0] secondary_startup_64+0xa4/0xb0