[....] 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. [ 65.385773][ T26] kauditd_printk_skb: 7 callbacks suppressed [ 65.385783][ T26] audit: type=1800 audit(1568470903.017:29): pid=9646 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 65.422500][ T26] audit: type=1800 audit(1568470903.017:30): pid=9646 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.45' (ECDSA) to the list of known hosts. syzkaller login: [ 74.587422][ T9798] IPVS: ftp: loaded support on port[0] = 21 [ 74.629891][ T9798] chnl_net:caif_netlink_parms(): no params data found [ 74.652507][ T9798] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.659846][ T9798] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.667668][ T9798] device bridge_slave_0 entered promiscuous mode [ 74.675136][ T9798] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.682489][ T9798] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.690058][ T9798] device bridge_slave_1 entered promiscuous mode [ 74.704795][ T9798] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 74.715426][ T9798] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 74.730707][ T9798] team0: Port device team_slave_0 added [ 74.737452][ T9798] team0: Port device team_slave_1 added [ 74.793241][ T9798] device hsr_slave_0 entered promiscuous mode [ 74.831914][ T9798] device hsr_slave_1 entered promiscuous mode [ 74.877060][ T9798] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.884818][ T9798] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.892346][ T9798] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.899767][ T9798] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.926014][ T9798] 8021q: adding VLAN 0 to HW filter on device bond0 [ 74.937373][ T3020] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 74.956728][ T3020] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.964965][ T3020] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.973224][ T3020] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 74.983854][ T9798] 8021q: adding VLAN 0 to HW filter on device team0 [ 74.993855][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 75.003063][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.010422][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.030127][ T9798] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 75.041136][ T9798] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 75.053738][ T3020] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 75.063337][ T3020] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.070696][ T3020] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.079249][ T3020] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 75.089412][ T3020] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 75.098153][ T3020] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 75.106585][ T3020] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 75.115347][ T3020] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 75.123148][ T3020] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready executing program [ 75.138090][ T9798] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 180.151380][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 180.158014][ C1] rcu: 1-...!: (10500 ticks this GP) idle=97a/0/0x3 softirq=9484/9484 fqs=0 [ 180.167701][ C1] (t=10500 jiffies g=9021 q=105) [ 180.172703][ C1] rcu: rcu_preempt kthread starved for 10500 jiffies! g9021 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 180.183949][ C1] rcu: RCU grace-period kthread stack dump: [ 180.189821][ C1] rcu_preempt I29688 10 2 0x80004000 [ 180.196135][ C1] Call Trace: [ 180.199418][ C1] __schedule+0x755/0x1580 [ 180.204261][ C1] ? __sched_text_start+0x8/0x8 [ 180.209092][ C1] schedule+0xd9/0x260 [ 180.213401][ C1] schedule_timeout+0x486/0xc50 [ 180.218228][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 180.223239][ C1] ? usleep_range+0x170/0x170 [ 180.227894][ C1] ? trace_hardirqs_on+0x67/0x240 [ 180.232902][ C1] ? __kasan_check_read+0x11/0x20 [ 180.237905][ C1] ? __next_timer_interrupt+0x1a0/0x1a0 [ 180.243435][ C1] ? swake_up_one+0x60/0x60 [ 180.247913][ C1] ? trace_hardirqs_on+0x67/0x240 [ 180.252916][ C1] rcu_gp_kthread+0x9b2/0x18c0 [ 180.257660][ C1] ? rcu_barrier+0x310/0x310 [ 180.262235][ C1] ? trace_hardirqs_on+0x67/0x240 [ 180.267233][ C1] ? __kasan_check_read+0x11/0x20 [ 180.272243][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 180.278460][ C1] ? __kthread_parkme+0x108/0x1c0 [ 180.283461][ C1] ? __kasan_check_read+0x11/0x20 [ 180.288465][ C1] kthread+0x361/0x430 [ 180.292521][ C1] ? rcu_barrier+0x310/0x310 [ 180.297090][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 180.303318][ C1] ret_from_fork+0x24/0x30 [ 180.307748][ C1] NMI backtrace for cpu 1 [ 180.312059][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0-rc8+ #0 [ 180.319140][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 180.329174][ C1] Call Trace: [ 180.332435][ C1] [ 180.335286][ C1] dump_stack+0x172/0x1f0 [ 180.339604][ C1] nmi_cpu_backtrace.cold+0x70/0xb2 [ 180.344787][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 180.351095][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 180.356705][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 180.362666][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 180.368549][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 180.373654][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 180.380221][ C1] ? raise_softirq+0x138/0x340 [ 180.384966][ C1] update_process_times+0x32/0x80 [ 180.390145][ C1] tick_sched_handle+0xa2/0x190 [ 180.394984][ C1] tick_sched_timer+0x53/0x140 [ 180.399728][ C1] __hrtimer_run_queues+0x364/0xe40 [ 180.404913][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 180.410179][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 180.415806][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 180.421675][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 180.427719][ C1] hrtimer_interrupt+0x314/0x770 [ 180.432641][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 180.438169][ C1] apic_timer_interrupt+0xf/0x20 [ 180.443086][ C1] RIP: 0010:hhf_dequeue+0x6de/0xa20 [ 180.448267][ C1] Code: 00 00 48 8b 45 c8 48 8d 7b 08 48 89 03 48 89 f8 48 c1 e8 03 42 80 3c 20 00 0f 85 8d 02 00 00 4c 89 f8 4c 89 7b 08 48 c1 e8 03 <42> 80 3c 20 00 0f 84 10 fe ff ff 4c 89 ff e8 9f 12 e6 fb e9 03 fe [ 180.467855][ C1] RSP: 0018:ffff8880ae909538 EFLAGS: 00000a06 ORIG_RAX: ffffffffffffff13 [ 180.476773][ C1] RAX: 1ffff1101447959a RBX: ffff8880a23cac38 RCX: ffffffff85c670f9 [ 180.484728][ C1] RDX: 0000000000000100 RSI: ffffffff85c6710b RDI: ffff8880a23cac40 [ 180.492684][ C1] RBP: ffff8880ae909588 R08: ffff8880a98c6340 R09: 0000000000000000 [ 180.500648][ C1] R10: fffffbfff134afaf R11: ffff8880a98c6340 R12: dffffc0000000000 [ 180.508604][ C1] R13: ffff8880a23ca940 R14: ffff8880a23cacd8 R15: ffff8880a23cacd0 [ 180.516558][ C1] ? apic_timer_interrupt+0xa/0x20 [ 180.521649][ C1] ? hhf_dequeue+0x679/0xa20 [ 180.526844][ C1] ? hhf_dequeue+0x68b/0xa20 [ 180.531430][ C1] ? hhf_dequeue+0x68b/0xa20 [ 180.536026][ C1] __qdisc_run+0x1e7/0x19d0 [ 180.540521][ C1] ? dev_queue_xmit+0x18/0x20 [ 180.545189][ C1] __dev_queue_xmit+0x16f1/0x3650 [ 180.550196][ C1] ? ndisc_constructor+0x1a5/0xb40 [ 180.555288][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 180.561074][ C1] ? ip6_finish_output2+0x1034/0x2520 [ 180.566423][ C1] ? __kasan_check_read+0x11/0x20 [ 180.571437][ C1] ? lock_downgrade+0x920/0x920 [ 180.576283][ C1] dev_queue_xmit+0x18/0x20 [ 180.580775][ C1] ? dev_queue_xmit+0x18/0x20 [ 180.585434][ C1] neigh_resolve_output+0x5a5/0x970 [ 180.590611][ C1] ip6_finish_output2+0x1034/0x2520 [ 180.595795][ C1] ? ip6_forward_finish+0x530/0x530 [ 180.600973][ C1] ? ip6_mtu+0x16f/0x460 [ 180.605197][ C1] __ip6_finish_output+0x444/0xa50 [ 180.610282][ C1] ? __ip6_finish_output+0x444/0xa50 [ 180.615543][ C1] ip6_finish_output+0x38/0x1f0 [ 180.620368][ C1] ip6_output+0x235/0x7c0 [ 180.624678][ C1] ? ip6_finish_output+0x1f0/0x1f0 [ 180.629764][ C1] ? __ip6_finish_output+0xa50/0xa50 [ 180.635027][ C1] ? icmp6_dst_alloc+0x432/0x660 [ 180.639950][ C1] mld_sendpack+0x9c7/0xea0 [ 180.644431][ C1] ? nf_hook.constprop.0+0x560/0x560 [ 180.649703][ C1] ? mld_ifc_timer_expire+0x437/0x8a0 [ 180.655051][ C1] ? __local_bh_enable_ip+0x15a/0x270 [ 180.660399][ C1] mld_ifc_timer_expire+0x449/0x8a0 [ 180.665578][ C1] call_timer_fn+0x1ac/0x780 [ 180.670144][ C1] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 180.675502][ C1] ? msleep_interruptible+0x150/0x150 [ 180.680853][ C1] ? trace_hardirqs_on+0x67/0x240 [ 180.685852][ C1] ? __kasan_check_read+0x11/0x20 [ 180.690852][ C1] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 180.696295][ C1] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 180.701654][ C1] run_timer_softirq+0x697/0x17a0 [ 180.706668][ C1] ? add_timer+0x930/0x930 [ 180.711062][ C1] ? kvm_clock_read+0x18/0x30 [ 180.715716][ C1] ? kvm_sched_clock_read+0x9/0x20 [ 180.720806][ C1] ? sched_clock+0x2e/0x50 [ 180.725209][ C1] ? sched_clock_cpu+0x1b/0x1b0 [ 180.731253][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 180.737472][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 180.743700][ C1] __do_softirq+0x262/0x98c [ 180.748187][ C1] ? sched_clock_cpu+0x1b/0x1b0 [ 180.753111][ C1] irq_exit+0x19b/0x1e0 [ 180.757768][ C1] smp_apic_timer_interrupt+0x1a3/0x610 [ 180.763295][ C1] apic_timer_interrupt+0xf/0x20 [ 180.768224][ C1] [ 180.771145][ C1] RIP: 0010:native_safe_halt+0xe/0x10 [ 180.776508][ C1] Code: 88 63 6e fa eb 8a 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 24 0b 4a 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 14 0b 4a 00 fb f4 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 2e 23 22 fa e8 f9 [ 180.796092][ C1] RSP: 0018:ffff8880a98dfd68 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 180.804685][ C1] RAX: 1ffffffff11a5e8d RBX: ffff8880a98c6340 RCX: 1ffffffff134b5ee [ 180.812632][ C1] RDX: dffffc0000000000 RSI: ffffffff8177f15e RDI: ffffffff873e150c [ 180.820592][ C1] RBP: ffff8880a98dfd98 R08: ffff8880a98c6340 R09: ffffed1015318c69 [ 180.828728][ C1] R10: ffffed1015318c68 R11: ffff8880a98c6347 R12: dffffc0000000000 [ 180.836677][ C1] R13: ffffffff89a57d78 R14: 0000000000000000 R15: 0000000000000001 [ 180.844647][ C1] ? trace_hardirqs_on+0x5e/0x240 [ 180.849821][ C1] ? default_idle+0x1c/0x360 [ 180.854386][ C1] ? default_idle+0x4e/0x360 [ 180.858954][ C1] arch_cpu_idle+0xa/0x10 [ 180.863261][ C1] default_idle_call+0x84/0xb0 [ 180.868003][ C1] do_idle+0x413/0x760 [ 180.872060][ C1] ? arch_cpu_idle_exit+0x80/0x80 [ 180.877058][ C1] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 180.882839][ C1] ? complete+0x61/0x80 [ 180.886974][ C1] cpu_startup_entry+0x1b/0x20 [ 180.891723][ C1] start_secondary+0x315/0x430 [ 180.896820][ C1] ? set_cpu_sibling_map+0x2180/0x2180 [ 180.902259][ C1] secondary_startup_64+0xa4/0xb0