[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 61.622783][ T26] audit: type=1800 audit(1568564783.643:25): pid=8901 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 61.667067][ T26] audit: type=1800 audit(1568564783.643:26): pid=8901 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 61.712124][ T26] audit: type=1800 audit(1568564783.643:27): pid=8901 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 '10.128.0.2' (ECDSA) to the list of known hosts. syzkaller login: [ 137.870936][ T9057] IPVS: ftp: loaded support on port[0] = 21 [ 137.931709][ T9057] chnl_net:caif_netlink_parms(): no params data found [ 137.963965][ T9057] bridge0: port 1(bridge_slave_0) entered blocking state [ 137.971916][ T9057] bridge0: port 1(bridge_slave_0) entered disabled state [ 137.979970][ T9057] device bridge_slave_0 entered promiscuous mode [ 137.989045][ T9057] bridge0: port 2(bridge_slave_1) entered blocking state [ 137.996161][ T9057] bridge0: port 2(bridge_slave_1) entered disabled state [ 138.004238][ T9057] device bridge_slave_1 entered promiscuous mode [ 138.023404][ T9057] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 138.034460][ T9057] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 138.053994][ T9057] team0: Port device team_slave_0 added [ 138.061681][ T9057] team0: Port device team_slave_1 added [ 138.119050][ T9057] device hsr_slave_0 entered promiscuous mode [ 138.167394][ T9057] device hsr_slave_1 entered promiscuous mode [ 138.216340][ T9057] bridge0: port 2(bridge_slave_1) entered blocking state [ 138.223588][ T9057] bridge0: port 2(bridge_slave_1) entered forwarding state [ 138.231726][ T9057] bridge0: port 1(bridge_slave_0) entered blocking state [ 138.238883][ T9057] bridge0: port 1(bridge_slave_0) entered forwarding state [ 138.276046][ T9057] 8021q: adding VLAN 0 to HW filter on device bond0 [ 138.291739][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 138.313078][ T3014] bridge0: port 1(bridge_slave_0) entered disabled state [ 138.322306][ T3014] bridge0: port 2(bridge_slave_1) entered disabled state [ 138.331479][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 138.343722][ T9057] 8021q: adding VLAN 0 to HW filter on device team0 [ 138.354633][ T3516] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 138.363404][ T3516] bridge0: port 1(bridge_slave_0) entered blocking state [ 138.371026][ T3516] bridge0: port 1(bridge_slave_0) entered forwarding state [ 138.387268][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 138.395906][ T3014] bridge0: port 2(bridge_slave_1) entered blocking state [ 138.403090][ T3014] bridge0: port 2(bridge_slave_1) entered forwarding state [ 138.415114][ T3516] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 138.424895][ T3516] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 138.435609][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 138.451344][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 138.465079][ T9057] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network executing program [ 138.480408][ T9057] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 138.488917][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 138.508192][ T9057] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 243.546849][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 243.553638][ C0] rcu: 0-....: (10500 ticks this GP) idle=fa2/0/0x3 softirq=9731/9731 fqs=5250 [ 243.563146][ C0] (t=10502 jiffies g=8017 q=122) [ 243.568189][ C0] NMI backtrace for cpu 0 [ 243.572505][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.3.0-rc7+ #0 [ 243.579623][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 243.590662][ C0] Call Trace: [ 243.593949][ C0] [ 243.596902][ C0] dump_stack+0x172/0x1f0 [ 243.601284][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 243.606511][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 243.612771][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 243.618409][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 243.624417][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 243.630503][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 243.635616][ C0] ? find_next_bit+0x107/0x130 [ 243.640379][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 243.645963][ C0] ? raise_softirq+0x138/0x340 [ 243.650730][ C0] update_process_times+0x32/0x80 [ 243.655748][ C0] tick_sched_handle+0xa2/0x190 [ 243.660641][ C0] tick_sched_timer+0x53/0x140 [ 243.665403][ C0] __hrtimer_run_queues+0x364/0xe40 [ 243.670600][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 243.675904][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 243.681437][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 243.687187][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 243.693441][ C0] hrtimer_interrupt+0x314/0x770 [ 243.698470][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 243.704040][ C0] apic_timer_interrupt+0xf/0x20 [ 243.708992][ C0] RIP: 0010:__list_add_valid+0x7d/0xa0 [ 243.714453][ C0] Code: 8b 16 4c 39 e2 0f 85 5f 01 00 00 49 39 f5 0f 84 3f 01 00 00 4d 39 e5 0f 84 36 01 00 00 48 83 c4 08 b8 01 00 00 00 41 5c 41 5d <5d> c3 48 89 75 e8 e8 c8 52 6e fe 48 8b 75 e8 eb 9f 48 89 f7 48 89 [ 243.734079][ C0] RSP: 0018:ffff8880ae809028 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 243.742483][ C0] RAX: 0000000000000001 RBX: ffff88809502e338 RCX: ffffffff85c7e431 [ 243.750436][ C0] RDX: ffff88809502e3d0 RSI: ffff88809502e3d0 RDI: ffff88809502e3d8 [ 243.758411][ C0] RBP: ffff8880ae809028 R08: ffffffff88e7a1c0 R09: fffffbfff14e9755 [ 243.767311][ C0] R10: ffffffff88e7ab40 R11: ffffffff88e7a1c0 R12: dffffc0000000000 [ 243.775432][ C0] R13: ffff88809502e040 R14: ffff88809502e3d8 R15: ffff88809502e3d0 [ 243.783463][ C0] ? apic_timer_interrupt+0xa/0x20 [ 243.788663][ C0] ? hhf_dequeue+0x5d1/0xa20 [ 243.793283][ C0] hhf_dequeue+0x66d/0xa20 [ 243.797723][ C0] __qdisc_run+0x1e7/0x19d0 [ 243.802343][ C0] ? dev_queue_xmit+0x18/0x20 [ 243.807033][ C0] __dev_queue_xmit+0x16f1/0x3650 [ 243.812081][ C0] ? __local_bh_enable_ip+0x15a/0x270 [ 243.817471][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 243.822896][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 243.829245][ C0] ? br_nf_post_routing+0xd73/0x1d30 [ 243.834600][ C0] ? br_forward_finish+0x235/0x400 [ 243.839732][ C0] ? find_held_lock+0x35/0x130 [ 243.844497][ C0] ? br_forward_finish+0x235/0x400 [ 243.849621][ C0] dev_queue_xmit+0x18/0x20 [ 243.854120][ C0] ? dev_queue_xmit+0x18/0x20 [ 243.858801][ C0] br_dev_queue_push_xmit+0x3f3/0x5c0 [ 243.864196][ C0] ? __kasan_check_read+0x11/0x20 [ 243.869225][ C0] br_forward_finish+0xfa/0x400 [ 243.874065][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 243.879600][ C0] ? br_fdb_add.cold+0x8c/0x8c [ 243.884354][ C0] ? __kasan_check_read+0x11/0x20 [ 243.889397][ C0] __br_forward+0x641/0xb00 [ 243.893900][ C0] ? br_forward_finish+0x400/0x400 [ 243.899045][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 243.904606][ C0] deliver_clone+0x61/0xc0 [ 243.909018][ C0] maybe_deliver+0x2c7/0x390 [ 243.913604][ C0] br_flood+0x13a/0x3d0 [ 243.917764][ C0] br_dev_xmit+0x98c/0x15a0 [ 243.922261][ C0] ? br_poll_controller+0x10/0x10 [ 243.927278][ C0] ? netif_skb_features+0x6c2/0xb90 [ 243.932481][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 243.938712][ C0] dev_hard_start_xmit+0x1a3/0x9c0 [ 243.943817][ C0] __dev_queue_xmit+0x2b15/0x3650 [ 243.948887][ C0] ? __kasan_check_read+0x11/0x20 [ 243.953922][ C0] ? __lock_acquire+0x2b42/0x4c30 [ 243.958932][ C0] ? __lock_acquire+0x8a2/0x4c30 [ 243.963902][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 243.969218][ C0] ? __kasan_check_read+0x11/0x20 [ 243.974255][ C0] ? mark_lock+0xc0/0x11e0 [ 243.978681][ C0] ? mark_held_locks+0xa4/0xf0 [ 243.983548][ C0] ? ip_finish_output2+0x13e2/0x2570 [ 243.988829][ C0] ? __ip_finish_output+0x5fc/0xb90 [ 243.994033][ C0] ? ip_finish_output2+0x13e2/0x2570 [ 243.999315][ C0] dev_queue_xmit+0x18/0x20 [ 244.003829][ C0] ? dev_queue_xmit+0x18/0x20 [ 244.008518][ C0] ip_finish_output2+0x1726/0x2570 [ 244.013747][ C0] ? nf_ct_deliver_cached_events+0x23d/0x6e0 [ 244.019735][ C0] ? ip_frag_next+0x910/0x910 [ 244.024428][ C0] __ip_finish_output+0x5fc/0xb90 [ 244.029448][ C0] ? __ip_finish_output+0x5fc/0xb90 [ 244.035858][ C0] ? audit_alloc_mark+0x3d0/0x500 [ 244.040869][ C0] ip_finish_output+0x38/0x1f0 [ 244.045617][ C0] ip_output+0x21f/0x640 [ 244.050006][ C0] ? ip_mc_output+0xf40/0xf40 [ 244.054701][ C0] ? __ip_finish_output+0xb90/0xb90 [ 244.059918][ C0] ip_local_out+0xbb/0x190 [ 244.064418][ C0] igmpv3_sendpack+0x1b5/0x2c0 [ 244.069201][ C0] igmp_ifc_timer_expire+0x687/0xa00 [ 244.074495][ C0] call_timer_fn+0x1ac/0x780 [ 244.079095][ C0] ? __ip_mc_dec_group+0x520/0x520 [ 244.084209][ C0] ? msleep_interruptible+0x150/0x150 [ 244.089599][ C0] ? run_timer_softirq+0x685/0x17a0 [ 244.094798][ C0] ? trace_hardirqs_on+0x67/0x240 [ 244.100074][ C0] ? __kasan_check_read+0x11/0x20 [ 244.105094][ C0] ? __ip_mc_dec_group+0x520/0x520 [ 244.110192][ C0] ? __ip_mc_dec_group+0x520/0x520 [ 244.115297][ C0] run_timer_softirq+0x697/0x17a0 [ 244.120310][ C0] ? add_timer+0x930/0x930 [ 244.124707][ C0] ? kvm_clock_read+0x18/0x30 [ 244.129363][ C0] ? kvm_sched_clock_read+0x9/0x20 [ 244.134546][ C0] ? sched_clock+0x2e/0x50 [ 244.138944][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 244.145175][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 244.151414][ C0] __do_softirq+0x262/0x98c [ 244.155898][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 244.160738][ C0] irq_exit+0x19b/0x1e0 [ 244.164899][ C0] smp_apic_timer_interrupt+0x1a3/0x610 [ 244.170455][ C0] apic_timer_interrupt+0xf/0x20 [ 244.175378][ C0] [ 244.178301][ C0] RIP: 0010:native_safe_halt+0xe/0x10 [ 244.183661][ 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 [ 244.203246][ C0] RSP: 0018:ffffffff88e07ce8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 244.211655][ C0] RAX: 1ffffffff11e5e8d RBX: ffffffff88e7a1c0 RCX: 0000000000000000 [ 244.219649][ C0] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffffffff88e7aa4c [ 244.227612][ C0] RBP: ffffffff88e07d18 R08: ffffffff88e7a1c0 R09: 0000000000000000 [ 244.235569][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 244.243524][ C0] R13: ffffffff89c5ab78 R14: 0000000000000000 R15: 0000000000000000 [ 244.251547][ C0] ? default_idle+0x4e/0x360 [ 244.256208][ C0] arch_cpu_idle+0xa/0x10 [ 244.260516][ C0] default_idle_call+0x84/0xb0 [ 244.265265][ C0] do_idle+0x413/0x760 [ 244.269317][ C0] ? arch_cpu_idle_exit+0x80/0x80 [ 244.274336][ C0] ? trace_hardirqs_on+0x67/0x240 [ 244.279341][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 244.285564][ C0] ? debug_smp_processor_id+0x3c/0x214 [ 244.291014][ C0] cpu_startup_entry+0x1b/0x20 [ 244.295780][ C0] rest_init+0x245/0x37b [ 244.300084][ C0] arch_call_rest_init+0xe/0x1b [ 244.304918][ C0] start_kernel+0x912/0x951 [ 244.309415][ C0] ? mem_encrypt_init+0xb/0xb [ 244.314087][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 244.320307][ C0] ? x86_family+0x41/0x50 [ 244.324617][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 244.330860][ C0] x86_64_start_reservations+0x29/0x2b [ 244.336300][ C0] x86_64_start_kernel+0x77/0x7b [ 244.341221][ C0] secondary_startup_64+0xa4/0xb0 [ 245.696947][ T3516] rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-... } 10677 jiffies s: 113 root: 0x1/. [ 245.710071][ T3516] rcu: blocking rcu_node structures: [ 245.715406][ T3516] Task dump for CPU 0: [ 245.719790][ T3516] swapper/0 R running task 28456 0 0 0x80004008 [ 245.729167][ T3516] Call Trace: [ 245.732505][ T3516] ? apic_timer_interrupt+0xa/0x20 [ 245.737935][ T3516] ? native_safe_halt+0xe/0x10 [ 245.742737][ T3516] ? default_idle+0x4e/0x360 [ 245.748699][ T3516] ? arch_cpu_idle+0xa/0x10 [ 245.753224][ T3516] ? default_idle_call+0x84/0xb0 [ 245.758359][ T3516] ? do_idle+0x413/0x760 [ 245.762657][ T3516] ? arch_cpu_idle_exit+0x80/0x80 [ 245.769076][ T3516] ? trace_hardirqs_on+0x67/0x240 [ 245.774158][ T3516] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 245.780736][ T3516] ? debug_smp_processor_id+0x3c/0x214 [ 245.786353][ T3516] ? cpu_startup_entry+0x1b/0x20 [ 245.792720][ T3516] ? rest_init+0x245/0x37b [ 245.797315][ T3516] ? arch_call_rest_init+0xe/0x1b [ 245.802374][ T3516] ? start_kernel+0x912/0x951 [ 245.808404][ T3516] ? mem_encrypt_init+0xb/0xb [ 245.813107][ T3516] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 245.819529][ T3516] ? x86_family+0x41/0x50 [ 245.823864][ T3516] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 245.831329][ T3516] ? x86_64_start_reservations+0x29/0x2b [ 245.837113][ T3516] ? x86_64_start_kernel+0x77/0x7b [ 245.842225][ T3516] ? secondary_startup_64+0xa4/0xb0