[....] 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. [ 61.662703][ T26] kauditd_printk_skb: 7 callbacks suppressed [ 61.662714][ T26] audit: type=1800 audit(1568145424.939:29): pid=9700 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 [ 61.696283][ T26] audit: type=1800 audit(1568145424.939:30): pid=9700 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 '10.128.0.200' (ECDSA) to the list of known hosts. syzkaller login: [ 106.797279][ T9854] IPVS: ftp: loaded support on port[0] = 21 [ 106.844661][ T9854] chnl_net:caif_netlink_parms(): no params data found [ 106.866033][ T9854] bridge0: port 1(bridge_slave_0) entered blocking state [ 106.873202][ T9854] bridge0: port 1(bridge_slave_0) entered disabled state [ 106.880715][ T9854] device bridge_slave_0 entered promiscuous mode [ 106.887969][ T9854] bridge0: port 2(bridge_slave_1) entered blocking state [ 106.895463][ T9854] bridge0: port 2(bridge_slave_1) entered disabled state [ 106.903092][ T9854] device bridge_slave_1 entered promiscuous mode [ 106.916142][ T9854] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 106.926516][ T9854] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 106.942493][ T9854] team0: Port device team_slave_0 added [ 106.949778][ T9854] team0: Port device team_slave_1 added [ 107.030896][ T9854] device hsr_slave_0 entered promiscuous mode [ 107.089646][ T9854] device hsr_slave_1 entered promiscuous mode [ 107.164424][ T9854] bridge0: port 2(bridge_slave_1) entered blocking state [ 107.171506][ T9854] bridge0: port 2(bridge_slave_1) entered forwarding state [ 107.178899][ T9854] bridge0: port 1(bridge_slave_0) entered blocking state [ 107.186060][ T9854] bridge0: port 1(bridge_slave_0) entered forwarding state [ 107.209895][ T9854] 8021q: adding VLAN 0 to HW filter on device bond0 [ 107.220429][ T3621] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 107.228497][ T3621] bridge0: port 1(bridge_slave_0) entered disabled state [ 107.236490][ T3621] bridge0: port 2(bridge_slave_1) entered disabled state [ 107.244063][ T3621] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 107.254993][ T9854] 8021q: adding VLAN 0 to HW filter on device team0 [ 107.264001][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 107.272404][ T17] bridge0: port 1(bridge_slave_0) entered blocking state [ 107.279470][ T17] bridge0: port 1(bridge_slave_0) entered forwarding state [ 107.297852][ T9854] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 107.308445][ T9854] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 107.320168][ T3621] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 107.328499][ T3621] bridge0: port 2(bridge_slave_1) entered blocking state [ 107.335569][ T3621] bridge0: port 2(bridge_slave_1) entered forwarding state [ 107.343411][ T3621] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 107.352141][ T3621] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready executing program [ 107.360390][ T3621] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 107.368462][ T3621] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 107.376735][ T3621] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 107.385385][ T3621] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 107.398774][ T9854] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 212.429349][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 212.435994][ C0] rcu: 0-...!: (1 GPs behind) idle=322/0/0x3 softirq=9802/9803 fqs=7 [ 212.444206][ C0] (t=10501 jiffies g=9189 q=92) [ 212.449122][ C0] rcu: rcu_preempt kthread starved for 10487 jiffies! g9189 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 212.460387][ C0] rcu: RCU grace-period kthread stack dump: [ 212.466255][ C0] rcu_preempt I29320 10 2 0x80004000 [ 212.472566][ C0] Call Trace: [ 212.475844][ C0] __schedule+0x755/0x1580 [ 212.480254][ C0] ? __sched_text_start+0x8/0x8 [ 212.485196][ C0] schedule+0xd9/0x260 [ 212.489245][ C0] schedule_timeout+0x486/0xc50 [ 212.494085][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 212.499003][ C0] ? usleep_range+0x170/0x170 [ 212.503657][ C0] ? trace_hardirqs_on+0x67/0x240 [ 212.508658][ C0] ? __kasan_check_read+0x11/0x20 [ 212.513662][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 212.519186][ C0] ? swake_up_one+0x60/0x60 [ 212.523671][ C0] rcu_gp_kthread+0x9b2/0x18c0 [ 212.528413][ C0] ? rcu_barrier+0x310/0x310 [ 212.532981][ C0] ? trace_hardirqs_on+0x67/0x240 [ 212.537983][ C0] ? __kasan_check_read+0x11/0x20 [ 212.542990][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 212.549208][ C0] ? __kthread_parkme+0x108/0x1c0 [ 212.554208][ C0] ? __kasan_check_read+0x11/0x20 [ 212.559224][ C0] kthread+0x361/0x430 [ 212.563271][ C0] ? rcu_barrier+0x310/0x310 [ 212.567856][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 212.574086][ C0] ret_from_fork+0x24/0x30 [ 212.578523][ C0] NMI backtrace for cpu 0 [ 212.582831][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.3.0-rc7+ #0 [ 212.589912][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 212.599940][ C0] Call Trace: [ 212.603199][ C0] [ 212.606033][ C0] dump_stack+0x172/0x1f0 [ 212.610343][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 212.615519][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 212.621738][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 212.627350][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 212.633308][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 212.639180][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 212.644272][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 212.649795][ C0] ? raise_softirq+0x138/0x340 [ 212.654540][ C0] update_process_times+0x32/0x80 [ 212.659546][ C0] tick_sched_handle+0xa2/0x190 [ 212.664384][ C0] tick_sched_timer+0x53/0x140 [ 212.669142][ C0] __hrtimer_run_queues+0x364/0xe40 [ 212.674333][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 212.679597][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 212.685118][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 212.690817][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 212.696862][ C0] hrtimer_interrupt+0x314/0x770 [ 212.701783][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 212.707308][ C0] apic_timer_interrupt+0xf/0x20 [ 212.712225][ C0] RIP: 0010:hhf_dequeue+0x51/0xa20 [ 212.717329][ C0] Code: 03 00 00 48 89 45 d0 48 c1 e8 03 4c 01 e0 48 89 45 c0 49 8d 85 90 03 00 00 48 89 45 c8 48 c1 e8 03 48 89 45 b8 e8 6f 17 ac fb <48> 8b 45 c0 80 38 00 0f 85 a8 07 00 00 48 8b 75 d0 49 8b 85 80 03 [ 212.736910][ C0] RSP: 0018:ffff8880ae809538 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 [ 212.745299][ C0] RAX: ffffffff88c7a1c0 RBX: ffff888098653538 RCX: ffffffff85c66409 [ 212.753249][ C0] RDX: 0000000000000100 RSI: ffffffff85c65de1 RDI: ffff888098653540 [ 212.761198][ C0] RBP: ffff8880ae809588 R08: ffffffff88c7a1c0 R09: 0000000000000000 [ 212.769147][ C0] R10: fffffbfff134af9f R11: ffffffff88c7a1c0 R12: dffffc0000000000 [ 212.777111][ C0] R13: ffff888098653240 R14: ffff8880986535d8 R15: ffff8880986535d0 [ 212.785080][ C0] ? apic_timer_interrupt+0xa/0x20 [ 212.790191][ C0] ? hhf_dequeue+0x679/0xa20 [ 212.794760][ C0] ? hhf_dequeue+0x51/0xa20 [ 212.799254][ C0] ? hhf_dequeue+0x51/0xa20 [ 212.803740][ C0] __qdisc_run+0x1e5/0x1a00 [ 212.808235][ C0] ? dev_queue_xmit+0x18/0x20 [ 212.812891][ C0] __dev_queue_xmit+0x16f1/0x3650 [ 212.817896][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 212.823162][ C0] ? ip6_finish_output2+0x1034/0x2520 [ 212.828537][ C0] ? __kasan_check_read+0x11/0x20 [ 212.833543][ C0] ? lock_downgrade+0x920/0x920 [ 212.838372][ C0] dev_queue_xmit+0x18/0x20 [ 212.842854][ C0] ? dev_queue_xmit+0x18/0x20 [ 212.847511][ C0] neigh_resolve_output+0x5a5/0x970 [ 212.852821][ C0] ip6_finish_output2+0x1034/0x2520 [ 212.858007][ C0] ? ip6_mtu+0x2e6/0x460 [ 212.862243][ C0] ? ip6_forward_finish+0x530/0x530 [ 212.867426][ C0] ? ip6_mtu+0x16f/0x460 [ 212.871655][ C0] __ip6_finish_output+0x444/0xa50 [ 212.876749][ C0] ? __ip6_finish_output+0x444/0xa50 [ 212.882020][ C0] ip6_finish_output+0x38/0x1f0 [ 212.886860][ C0] ip6_output+0x235/0x7c0 [ 212.891187][ C0] ? ip6_finish_output+0x1f0/0x1f0 [ 212.896275][ C0] ? __ip6_finish_output+0xa50/0xa50 [ 212.901537][ C0] ? icmp6_dst_alloc+0x432/0x660 [ 212.906453][ C0] mld_sendpack+0x9c7/0xea0 [ 212.910936][ C0] ? nf_hook.constprop.0+0x560/0x560 [ 212.916202][ C0] ? mld_ifc_timer_expire+0x437/0x8a0 [ 212.921553][ C0] ? __local_bh_enable_ip+0x15a/0x270 [ 212.926905][ C0] mld_ifc_timer_expire+0x449/0x8a0 [ 212.932086][ C0] call_timer_fn+0x1ac/0x780 [ 212.936653][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 212.942003][ C0] ? msleep_interruptible+0x150/0x150 [ 212.947356][ C0] ? trace_hardirqs_on+0x67/0x240 [ 212.952357][ C0] ? __kasan_check_read+0x11/0x20 [ 212.957356][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 212.962704][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 212.968054][ C0] run_timer_softirq+0x697/0x17a0 [ 212.973058][ C0] ? add_timer+0x930/0x930 [ 212.977451][ C0] ? kvm_clock_read+0x18/0x30 [ 212.982107][ C0] ? kvm_sched_clock_read+0x9/0x20 [ 212.987197][ C0] ? sched_clock+0x2e/0x50 [ 212.991593][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 212.996423][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 213.002661][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 213.008882][ C0] __do_softirq+0x262/0x98c [ 213.013362][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 213.018193][ C0] irq_exit+0x19b/0x1e0 [ 213.022328][ C0] smp_apic_timer_interrupt+0x1a3/0x610 [ 213.027852][ C0] apic_timer_interrupt+0xf/0x20 [ 213.032763][ C0] [ 213.035682][ C0] RIP: 0010:native_safe_halt+0xe/0x10 [ 213.041034][ C0] Code: a8 71 6e fa eb 8a 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d b4 19 4a 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d a4 19 4a 00 fb f4 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 de 31 22 fa e8 e9 [ 213.060628][ C0] RSP: 0018:ffffffff88c07ce8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 213.069016][ C0] RAX: 1ffffffff11a5e8d RBX: ffffffff88c7a1c0 RCX: 1ffffffff134b5de [ 213.076977][ C0] RDX: dffffc0000000000 RSI: ffffffff8177f1ae RDI: ffffffff873e067c [ 213.084940][ C0] RBP: ffffffff88c07d18 R08: ffffffff88c7a1c0 R09: fffffbfff118f439 [ 213.092888][ C0] R10: fffffbfff118f438 R11: ffffffff88c7a1c7 R12: dffffc0000000000 [ 213.100836][ C0] R13: ffffffff89a57cf8 R14: 0000000000000000 R15: 0000000000000000 [ 213.108812][ C0] ? trace_hardirqs_on+0x5e/0x240 [ 213.113829][ C0] ? default_idle+0x1c/0x360 [ 213.118409][ C0] ? default_idle+0x4e/0x360 [ 213.122990][ C0] arch_cpu_idle+0xa/0x10 [ 213.127301][ C0] default_idle_call+0x84/0xb0 [ 213.132046][ C0] do_idle+0x413/0x760 [ 213.136097][ C0] ? arch_cpu_idle_exit+0x80/0x80 [ 213.141101][ C0] ? trace_hardirqs_on+0x67/0x240 [ 213.146105][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 213.152326][ C0] ? debug_smp_processor_id+0x3c/0x214 [ 213.157765][ C0] cpu_startup_entry+0x1b/0x20 [ 213.162509][ C0] rest_init+0x245/0x37b [ 213.166732][ C0] arch_call_rest_init+0xe/0x1b [ 213.171559][ C0] start_kernel+0x912/0x951 [ 213.176061][ C0] ? mem_encrypt_init+0xb/0xb [ 213.180720][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 213.186947][ C0] ? x86_family+0x41/0x50 [ 213.191262][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 213.197478][ C0] x86_64_start_reservations+0x29/0x2b [ 213.202932][ C0] x86_64_start_kernel+0x77/0x7b [ 213.207851][ C0] secondary_startup_64+0xa4/0xb0