[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] 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. [ 64.191949][ T26] kauditd_printk_skb: 7 callbacks suppressed [ 64.191959][ T26] audit: type=1800 audit(1568433621.523:29): pid=9615 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 [ 64.228547][ T26] audit: type=1800 audit(1568433621.523:30): pid=9615 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 '10.128.1.3' (ECDSA) to the list of known hosts. syzkaller login: [ 347.999352][ T9769] IPVS: ftp: loaded support on port[0] = 21 [ 348.045351][ T9769] chnl_net:caif_netlink_parms(): no params data found [ 348.067661][ T9769] bridge0: port 1(bridge_slave_0) entered blocking state [ 348.074821][ T9769] bridge0: port 1(bridge_slave_0) entered disabled state [ 348.082458][ T9769] device bridge_slave_0 entered promiscuous mode [ 348.089845][ T9769] bridge0: port 2(bridge_slave_1) entered blocking state [ 348.096950][ T9769] bridge0: port 2(bridge_slave_1) entered disabled state [ 348.104391][ T9769] device bridge_slave_1 entered promiscuous mode [ 348.118777][ T9769] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 348.128899][ T9769] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 348.144062][ T9769] team0: Port device team_slave_0 added [ 348.150932][ T9769] team0: Port device team_slave_1 added [ 348.207843][ T9769] device hsr_slave_0 entered promiscuous mode [ 348.246400][ T9769] device hsr_slave_1 entered promiscuous mode [ 348.321061][ T9769] bridge0: port 2(bridge_slave_1) entered blocking state [ 348.328171][ T9769] bridge0: port 2(bridge_slave_1) entered forwarding state [ 348.335427][ T9769] bridge0: port 1(bridge_slave_0) entered blocking state [ 348.342491][ T9769] bridge0: port 1(bridge_slave_0) entered forwarding state [ 348.366596][ T9769] 8021q: adding VLAN 0 to HW filter on device bond0 [ 348.377356][ T9771] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 348.385290][ T9771] bridge0: port 1(bridge_slave_0) entered disabled state [ 348.393521][ T9771] bridge0: port 2(bridge_slave_1) entered disabled state [ 348.401102][ T9771] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 348.411058][ T9769] 8021q: adding VLAN 0 to HW filter on device team0 [ 348.431017][ T3516] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 348.439466][ T3516] bridge0: port 1(bridge_slave_0) entered blocking state [ 348.446658][ T3516] bridge0: port 1(bridge_slave_0) entered forwarding state [ 348.465616][ T9769] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 348.476273][ T9769] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 348.488084][ T3593] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 348.496683][ T3593] bridge0: port 2(bridge_slave_1) entered blocking state [ 348.503726][ T3593] bridge0: port 2(bridge_slave_1) entered forwarding state [ 348.511676][ T3593] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 348.521009][ T3593] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready executing program [ 348.529592][ T3593] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 348.537788][ T3593] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 348.545857][ T3593] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 348.553408][ T3593] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 348.566685][ T9769] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 453.616033][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 453.622695][ C0] rcu: 0-...!: (1 GPs behind) idle=ac6/0/0x3 softirq=9304/9305 fqs=7 [ 453.630909][ C0] (t=10501 jiffies g=9229 q=95) [ 453.635828][ C0] rcu: rcu_preempt kthread starved for 10487 jiffies! g9229 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 453.647098][ C0] rcu: RCU grace-period kthread stack dump: [ 453.652967][ C0] rcu_preempt I29392 10 2 0x80004000 [ 453.659299][ C0] Call Trace: [ 453.662674][ C0] __schedule+0x755/0x1580 [ 453.667076][ C0] ? __sched_text_start+0x8/0x8 [ 453.671981][ C0] schedule+0xd9/0x260 [ 453.676548][ C0] schedule_timeout+0x486/0xc50 [ 453.681377][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 453.686291][ C0] ? usleep_range+0x170/0x170 [ 453.690943][ C0] ? trace_hardirqs_on+0x67/0x240 [ 453.695947][ C0] ? __kasan_check_read+0x11/0x20 [ 453.700958][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 453.706495][ C0] ? swake_up_one+0x60/0x60 [ 453.710977][ C0] rcu_gp_kthread+0x9b2/0x18c0 [ 453.715719][ C0] ? rcu_barrier+0x310/0x310 [ 453.720286][ C0] ? trace_hardirqs_on+0x67/0x240 [ 453.725285][ C0] ? __kasan_check_read+0x11/0x20 [ 453.730289][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 453.736514][ C0] ? __kthread_parkme+0x108/0x1c0 [ 453.741515][ C0] ? __kasan_check_read+0x11/0x20 [ 453.746525][ C0] kthread+0x361/0x430 [ 453.750571][ C0] ? rcu_barrier+0x310/0x310 [ 453.755139][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 453.761355][ C0] ret_from_fork+0x24/0x30 [ 453.765783][ C0] NMI backtrace for cpu 0 [ 453.770094][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.3.0-rc8+ #0 [ 453.777195][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 453.787224][ C0] Call Trace: [ 453.790493][ C0] <IRQ> [ 453.793363][ C0] dump_stack+0x172/0x1f0 [ 453.797675][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 453.802849][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 453.809090][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 453.814700][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 453.821198][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 453.827068][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 453.832158][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 453.838115][ C0] ? raise_softirq+0x138/0x340 [ 453.842856][ C0] update_process_times+0x32/0x80 [ 453.847858][ C0] tick_sched_handle+0xa2/0x190 [ 453.852687][ C0] tick_sched_timer+0x53/0x140 [ 453.857429][ C0] __hrtimer_run_queues+0x364/0xe40 [ 453.862618][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 453.867901][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 453.873437][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 453.879148][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 453.885193][ C0] hrtimer_interrupt+0x314/0x770 [ 453.890157][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 453.895681][ C0] apic_timer_interrupt+0xf/0x20 [ 453.900773][ C0] RIP: 0010:__sanitizer_cov_trace_pc+0x1e/0x50 [ 453.906911][ C0] Code: e9 ff ff 90 90 90 90 90 90 90 90 90 55 48 89 e5 65 48 8b 04 25 40 fe 01 00 65 8b 15 f4 88 8f 7e 81 e2 00 01 1f 00 48 8b 75 08 <75> 2b 8b 90 f0 12 00 00 83 fa 02 75 20 48 8b 88 f8 12 00 00 8b 80 [ 453.926491][ C0] RSP: 0018:ffff8880ae809528 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 [ 453.934886][ C0] RAX: ffffffff88c7a1c0 RBX: ffff8880a040b078 RCX: ffffffff85c670f9 [ 453.942846][ C0] RDX: 0000000000000100 RSI: ffffffff85c6710b RDI: 0000000000000001 [ 453.950799][ C0] RBP: ffff8880ae809528 R08: ffffffff88c7a1c0 R09: 0000000000000000 [ 453.958766][ C0] R10: fffffbfff134afaf R11: ffffffff88c7a1c0 R12: dffffc0000000000 [ 453.966713][ C0] R13: ffff8880a040ad80 R14: ffff8880a040b118 R15: ffff8880a040b110 [ 453.974670][ C0] ? apic_timer_interrupt+0xa/0x20 [ 453.979812][ C0] ? hhf_dequeue+0x679/0xa20 [ 453.984379][ C0] ? hhf_dequeue+0x68b/0xa20 [ 453.988948][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 453.995163][ C0] hhf_dequeue+0x68b/0xa20 [ 453.999604][ C0] __qdisc_run+0x1e7/0x19d0 [ 454.004115][ C0] ? dev_queue_xmit+0x18/0x20 [ 454.008773][ C0] __dev_queue_xmit+0x16f1/0x3650 [ 454.013816][ C0] ? ndisc_constructor+0x1a5/0xb40 [ 454.018910][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 454.024201][ C0] ? ip6_finish_output2+0x1034/0x2520 [ 454.029551][ C0] ? __kasan_check_read+0x11/0x20 [ 454.034557][ C0] ? lock_downgrade+0x920/0x920 [ 454.039387][ C0] dev_queue_xmit+0x18/0x20 [ 454.043867][ C0] ? dev_queue_xmit+0x18/0x20 [ 454.048564][ C0] neigh_resolve_output+0x5a5/0x970 [ 454.053749][ C0] ip6_finish_output2+0x1034/0x2520 [ 454.058927][ C0] ? ip6_forward_finish+0x530/0x530 [ 454.064103][ C0] ? ip6_mtu+0x16f/0x460 [ 454.068324][ C0] __ip6_finish_output+0x444/0xa50 [ 454.073411][ C0] ? __ip6_finish_output+0x444/0xa50 [ 454.078672][ C0] ip6_finish_output+0x38/0x1f0 [ 454.083500][ C0] ip6_output+0x235/0x7c0 [ 454.087808][ C0] ? ip6_finish_output+0x1f0/0x1f0 [ 454.092902][ C0] ? __ip6_finish_output+0xa50/0xa50 [ 454.098199][ C0] ? icmp6_dst_alloc+0x432/0x660 [ 454.103123][ C0] mld_sendpack+0x9c7/0xea0 [ 454.107612][ C0] ? nf_hook.constprop.0+0x560/0x560 [ 454.112874][ C0] ? mld_ifc_timer_expire+0x437/0x8a0 [ 454.118224][ C0] ? __local_bh_enable_ip+0x15a/0x270 [ 454.123574][ C0] mld_ifc_timer_expire+0x449/0x8a0 [ 454.128757][ C0] call_timer_fn+0x1ac/0x780 [ 454.133325][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 454.138675][ C0] ? msleep_interruptible+0x150/0x150 [ 454.144034][ C0] ? trace_hardirqs_on+0x67/0x240 [ 454.149036][ C0] ? __kasan_check_read+0x11/0x20 [ 454.154035][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 454.159393][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 454.164754][ C0] run_timer_softirq+0x697/0x17a0 [ 454.169759][ C0] ? add_timer+0x930/0x930 [ 454.174153][ C0] ? kvm_clock_read+0x18/0x30 [ 454.178820][ C0] ? kvm_sched_clock_read+0x9/0x20 [ 454.183906][ C0] ? sched_clock+0x2e/0x50 [ 454.188299][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 454.193129][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 454.199349][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 454.205827][ C0] __do_softirq+0x262/0x98c [ 454.210312][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 454.215143][ C0] irq_exit+0x19b/0x1e0 [ 454.219278][ C0] smp_apic_timer_interrupt+0x1a3/0x610 [ 454.224803][ C0] apic_timer_interrupt+0xf/0x20 [ 454.229710][ C0] </IRQ> [ 454.232740][ C0] RIP: 0010:native_safe_halt+0xe/0x10 [ 454.238104][ 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 <c3> 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 2e 23 22 fa e8 f9 [ 454.257694][ C0] RSP: 0018:ffffffff88c07ce8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 454.266086][ C0] RAX: 1ffffffff11a5e8d RBX: ffffffff88c7a1c0 RCX: 1ffffffff134b5ee [ 454.274036][ C0] RDX: dffffc0000000000 RSI: ffffffff8177f15e RDI: ffffffff873e150c [ 454.281994][ C0] RBP: ffffffff88c07d18 R08: ffffffff88c7a1c0 R09: fffffbfff118f439 [ 454.289944][ C0] R10: fffffbfff118f438 R11: ffffffff88c7a1c7 R12: dffffc0000000000 [ 454.297891][ C0] R13: ffffffff89a57d78 R14: 0000000000000000 R15: 0000000000000000 [ 454.305849][ C0] ? trace_hardirqs_on+0x5e/0x240 [ 454.310848][ C0] ? default_idle+0x1c/0x360 [ 454.315416][ C0] ? default_idle+0x4e/0x360 [ 454.319982][ C0] arch_cpu_idle+0xa/0x10 [ 454.324288][ C0] default_idle_call+0x84/0xb0 [ 454.329034][ C0] do_idle+0x413/0x760 [ 454.333093][ C0] ? arch_cpu_idle_exit+0x80/0x80 [ 454.338095][ C0] ? trace_hardirqs_on+0x67/0x240 [ 454.343097][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 454.349327][ C0] ? debug_smp_processor_id+0x3c/0x214 [ 454.354763][ C0] cpu_startup_entry+0x1b/0x20 [ 454.359504][ C0] rest_init+0x245/0x37b [ 454.363781][ C0] arch_call_rest_init+0xe/0x1b [ 454.368608][ C0] start_kernel+0x912/0x951 [ 454.373088][ C0] ? mem_encrypt_init+0xb/0xb [ 454.377744][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 454.383971][ C0] ? x86_family+0x41/0x50 [ 454.388280][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 454.394508][ C0] x86_64_start_reservations+0x29/0x2b [ 454.399941][ C0] x86_64_start_kernel+0x77/0x7b [ 454.404859][ C0] secondary_startup_64+0xa4/0xb0