[....] 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. [ 68.486860][ T26] kauditd_printk_skb: 7 callbacks suppressed [ 68.486870][ T26] audit: type=1800 audit(1568491130.870:29): pid=9640 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 [ 68.513920][ T26] audit: type=1800 audit(1568491130.870:30): pid=9640 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 '10.128.0.13' (ECDSA) to the list of known hosts. syzkaller login: [ 230.556350][ T9791] IPVS: ftp: loaded support on port[0] = 21 [ 230.600368][ T9791] chnl_net:caif_netlink_parms(): no params data found [ 230.625622][ T9791] bridge0: port 1(bridge_slave_0) entered blocking state [ 230.632809][ T9791] bridge0: port 1(bridge_slave_0) entered disabled state [ 230.640402][ T9791] device bridge_slave_0 entered promiscuous mode [ 230.648046][ T9791] bridge0: port 2(bridge_slave_1) entered blocking state [ 230.656207][ T9791] bridge0: port 2(bridge_slave_1) entered disabled state [ 230.663865][ T9791] device bridge_slave_1 entered promiscuous mode [ 230.678186][ T9791] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 230.689158][ T9791] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 230.706450][ T9791] team0: Port device team_slave_0 added [ 230.713456][ T9791] team0: Port device team_slave_1 added [ 230.783206][ T9791] device hsr_slave_0 entered promiscuous mode [ 230.841452][ T9791] device hsr_slave_1 entered promiscuous mode [ 230.886880][ T9791] bridge0: port 2(bridge_slave_1) entered blocking state [ 230.893986][ T9791] bridge0: port 2(bridge_slave_1) entered forwarding state [ 230.901438][ T9791] bridge0: port 1(bridge_slave_0) entered blocking state [ 230.908562][ T9791] bridge0: port 1(bridge_slave_0) entered forwarding state [ 230.935658][ T9791] 8021q: adding VLAN 0 to HW filter on device bond0 [ 230.947748][ T3021] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 230.966878][ T3021] bridge0: port 1(bridge_slave_0) entered disabled state [ 230.975033][ T3021] bridge0: port 2(bridge_slave_1) entered disabled state [ 230.983275][ T3021] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 230.994155][ T9791] 8021q: adding VLAN 0 to HW filter on device team0 [ 231.004317][ T3516] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 231.013137][ T3516] bridge0: port 1(bridge_slave_0) entered blocking state [ 231.020310][ T3516] bridge0: port 1(bridge_slave_0) entered forwarding state [ 231.040760][ T9791] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 231.051869][ T9791] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 231.064286][ T3021] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 231.073332][ T3021] bridge0: port 2(bridge_slave_1) entered blocking state [ 231.080465][ T3021] bridge0: port 2(bridge_slave_1) entered forwarding state [ 231.088826][ T3021] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 231.097382][ T3021] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 231.105856][ T3021] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 231.114141][ T3021] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 231.122341][ T3021] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 231.129836][ T3021] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready executing program executing program executing program executing program [ 231.143181][ T9791] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 336.170901][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 336.177544][ C0] rcu: 0-...!: (1 GPs behind) idle=466/0/0x3 softirq=10097/10098 fqs=30 [ 336.186032][ C0] (t=10501 jiffies g=9285 q=208) [ 336.191041][ C0] rcu: rcu_preempt kthread starved for 10442 jiffies! g9285 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 336.202295][ C0] rcu: RCU grace-period kthread stack dump: [ 336.208164][ C0] rcu_preempt I29392 10 2 0x80004000 [ 336.214483][ C0] Call Trace: [ 336.217834][ C0] __schedule+0x755/0x1580 [ 336.222235][ C0] ? __sched_text_start+0x8/0x8 [ 336.227069][ C0] schedule+0xd9/0x260 [ 336.231142][ C0] schedule_timeout+0x486/0xc50 [ 336.235980][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 336.240900][ C0] ? usleep_range+0x170/0x170 [ 336.246249][ C0] ? trace_hardirqs_on+0x67/0x240 [ 336.251258][ C0] ? __kasan_check_read+0x11/0x20 [ 336.256260][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 336.261795][ C0] ? swake_up_one+0x60/0x60 [ 336.266282][ C0] rcu_gp_kthread+0x9b2/0x18c0 [ 336.271026][ C0] ? rcu_barrier+0x310/0x310 [ 336.275594][ C0] ? trace_hardirqs_on+0x67/0x240 [ 336.280594][ C0] ? __kasan_check_read+0x11/0x20 [ 336.285602][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 336.291907][ C0] ? __kthread_parkme+0x108/0x1c0 [ 336.296908][ C0] ? __kasan_check_read+0x11/0x20 [ 336.301920][ C0] kthread+0x361/0x430 [ 336.305968][ C0] ? rcu_barrier+0x310/0x310 [ 336.310542][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 336.316763][ C0] ret_from_fork+0x24/0x30 [ 336.321184][ C0] NMI backtrace for cpu 0 [ 336.325514][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.3.0-rc8+ #0 [ 336.332603][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 336.342668][ C0] Call Trace: [ 336.345931][ C0] [ 336.348824][ C0] dump_stack+0x172/0x1f0 [ 336.353135][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 336.358312][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 336.364537][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 336.370162][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 336.376209][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 336.382084][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 336.387176][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 336.392702][ C0] ? raise_softirq+0x138/0x340 [ 336.397720][ C0] update_process_times+0x32/0x80 [ 336.402727][ C0] tick_sched_handle+0xa2/0x190 [ 336.407569][ C0] tick_sched_timer+0x53/0x140 [ 336.412311][ C0] __hrtimer_run_queues+0x364/0xe40 [ 336.417505][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 336.422947][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 336.428480][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 336.434179][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 336.440228][ C0] hrtimer_interrupt+0x314/0x770 [ 336.445203][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 336.450756][ C0] apic_timer_interrupt+0xf/0x20 [ 336.455718][ C0] RIP: 0010:hhf_dequeue+0x6ab/0xa20 [ 336.460924][ C0] Code: 84 c6 f9 ff ff e8 f5 03 ac fb 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 0f 85 08 03 00 00 48 89 d8 49 89 9d 98 03 00 00 48 c1 e8 03 <42> 80 3c 20 00 0f 85 b4 02 00 00 48 8b 45 c8 48 8d 7b 08 48 89 03 [ 336.480514][ C0] RSP: 0018:ffff8880ae809538 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff13 [ 336.488918][ C0] RAX: 1ffff110150e4ea7 RBX: ffff8880a8727538 RCX: ffffffff85c670f9 [ 336.496871][ C0] RDX: 0000000000000100 RSI: ffffffff85c6710b RDI: 0000000000000001 [ 336.504838][ C0] RBP: ffff8880ae809588 R08: ffffffff88c7a1c0 R09: 0000000000000000 [ 336.512800][ C0] R10: fffffbfff134afaf R11: ffffffff88c7a1c0 R12: dffffc0000000000 [ 336.521366][ C0] R13: ffff8880a8727240 R14: ffff8880a87275d8 R15: ffff8880a87275d0 [ 336.529435][ C0] ? apic_timer_interrupt+0xa/0x20 [ 336.534532][ C0] ? hhf_dequeue+0x679/0xa20 [ 336.539136][ C0] ? hhf_dequeue+0x68b/0xa20 [ 336.543731][ C0] ? hhf_dequeue+0x68b/0xa20 [ 336.548379][ C0] __qdisc_run+0x1e7/0x19d0 [ 336.552906][ C0] ? dev_queue_xmit+0x18/0x20 [ 336.557567][ C0] __dev_queue_xmit+0x16f1/0x3650 [ 336.562620][ C0] ? ndisc_constructor+0x1a5/0xb40 [ 336.567732][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 336.573058][ C0] ? ip6_finish_output2+0x1034/0x2520 [ 336.578418][ C0] ? __kasan_check_read+0x11/0x20 [ 336.584226][ C0] ? lock_downgrade+0x920/0x920 [ 336.589863][ C0] dev_queue_xmit+0x18/0x20 [ 336.594435][ C0] ? dev_queue_xmit+0x18/0x20 [ 336.599143][ C0] neigh_resolve_output+0x5a5/0x970 [ 336.604329][ C0] ip6_finish_output2+0x1034/0x2520 [ 336.609510][ C0] ? ip6_forward_finish+0x530/0x530 [ 336.614774][ C0] ? ip6_mtu+0x16f/0x460 [ 336.618998][ C0] __ip6_finish_output+0x444/0xa50 [ 336.624098][ C0] ? __ip6_finish_output+0x444/0xa50 [ 336.629362][ C0] ip6_finish_output+0x38/0x1f0 [ 336.634197][ C0] ip6_output+0x235/0x7c0 [ 336.638511][ C0] ? ip6_finish_output+0x1f0/0x1f0 [ 336.643601][ C0] ? __ip6_finish_output+0xa50/0xa50 [ 336.648865][ C0] ? icmp6_dst_alloc+0x432/0x660 [ 336.653788][ C0] mld_sendpack+0x9c7/0xea0 [ 336.658272][ C0] ? nf_hook.constprop.0+0x560/0x560 [ 336.663553][ C0] ? mld_ifc_timer_expire+0x437/0x8a0 [ 336.669002][ C0] ? __local_bh_enable_ip+0x15a/0x270 [ 336.674364][ C0] mld_ifc_timer_expire+0x449/0x8a0 [ 336.679644][ C0] call_timer_fn+0x1ac/0x780 [ 336.684214][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 336.689653][ C0] ? msleep_interruptible+0x150/0x150 [ 336.695018][ C0] ? trace_hardirqs_on+0x67/0x240 [ 336.700247][ C0] ? __kasan_check_read+0x11/0x20 [ 336.705250][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 336.710608][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 336.715960][ C0] run_timer_softirq+0x697/0x17a0 [ 336.720975][ C0] ? add_timer+0x930/0x930 [ 336.725477][ C0] ? kvm_clock_read+0x18/0x30 [ 336.730216][ C0] ? kvm_sched_clock_read+0x9/0x20 [ 336.735451][ C0] ? sched_clock+0x2e/0x50 [ 336.739936][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 336.744798][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 336.751027][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 336.757346][ C0] __do_softirq+0x262/0x98c [ 336.761832][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 336.766669][ C0] irq_exit+0x19b/0x1e0 [ 336.770809][ C0] smp_apic_timer_interrupt+0x1a3/0x610 [ 336.776439][ C0] apic_timer_interrupt+0xf/0x20 [ 336.781360][ C0] [ 336.784290][ C0] RIP: 0010:native_safe_halt+0xe/0x10 [ 336.789643][ C0] 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 [ 336.809257][ C0] RSP: 0018:ffffffff88c07ce8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 336.818617][ C0] RAX: 1ffffffff11a5e8d RBX: ffffffff88c7a1c0 RCX: 1ffffffff134b5ee [ 336.826579][ C0] RDX: dffffc0000000000 RSI: ffffffff8177f15e RDI: ffffffff873e150c [ 336.834622][ C0] RBP: ffffffff88c07d18 R08: ffffffff88c7a1c0 R09: fffffbfff118f439 [ 336.842577][ C0] R10: fffffbfff118f438 R11: ffffffff88c7a1c7 R12: dffffc0000000000 [ 336.850791][ C0] R13: ffffffff89a57d78 R14: 0000000000000000 R15: 0000000000000000 [ 336.858777][ C0] ? trace_hardirqs_on+0x5e/0x240 [ 336.863782][ C0] ? default_idle+0x1c/0x360 [ 336.868486][ C0] ? default_idle+0x4e/0x360 [ 336.873193][ C0] arch_cpu_idle+0xa/0x10 [ 336.878387][ C0] default_idle_call+0x84/0xb0 [ 336.883149][ C0] do_idle+0x413/0x760 [ 336.887199][ C0] ? arch_cpu_idle_exit+0x80/0x80 [ 336.892210][ C0] ? trace_hardirqs_on+0x67/0x240 [ 336.897229][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 336.903458][ C0] ? debug_smp_processor_id+0x3c/0x214 [ 336.908921][ C0] cpu_startup_entry+0x1b/0x20 [ 336.913664][ C0] rest_init+0x245/0x37b [ 336.917960][ C0] arch_call_rest_init+0xe/0x1b [ 336.922790][ C0] start_kernel+0x912/0x951 [ 336.927282][ C0] ? mem_encrypt_init+0xb/0xb [ 336.931951][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 336.938178][ C0] ? x86_family+0x41/0x50 [ 336.942497][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 336.948718][ C0] x86_64_start_reservations+0x29/0x2b [ 336.954155][ C0] x86_64_start_kernel+0x77/0x7b [ 336.959071][ C0] secondary_startup_64+0xa4/0xb0