[ 63.668152][ T26] audit: type=1800 audit(1568399090.733:27): pid=9735 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 63.689621][ T26] audit: type=1800 audit(1568399090.733:28): pid=9735 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 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. [ 64.559422][ T26] audit: type=1800 audit(1568399091.663:29): pid=9735 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 [ 64.580980][ T26] audit: type=1800 audit(1568399091.663:30): pid=9735 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 '10.128.0.184' (ECDSA) to the list of known hosts. syzkaller login: [ 361.962442][ T9892] IPVS: ftp: loaded support on port[0] = 21 [ 362.008339][ T9892] chnl_net:caif_netlink_parms(): no params data found [ 362.030357][ T9892] bridge0: port 1(bridge_slave_0) entered blocking state [ 362.037524][ T9892] bridge0: port 1(bridge_slave_0) entered disabled state [ 362.045048][ T9892] device bridge_slave_0 entered promiscuous mode [ 362.052262][ T9892] bridge0: port 2(bridge_slave_1) entered blocking state [ 362.059627][ T9892] bridge0: port 2(bridge_slave_1) entered disabled state [ 362.067221][ T9892] device bridge_slave_1 entered promiscuous mode [ 362.081452][ T9892] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 362.091980][ T9892] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 362.108381][ T9892] team0: Port device team_slave_0 added [ 362.114811][ T9892] team0: Port device team_slave_1 added [ 362.167992][ T9892] device hsr_slave_0 entered promiscuous mode [ 362.246604][ T9892] device hsr_slave_1 entered promiscuous mode [ 362.331778][ T9892] bridge0: port 2(bridge_slave_1) entered blocking state [ 362.338902][ T9892] bridge0: port 2(bridge_slave_1) entered forwarding state [ 362.346161][ T9892] bridge0: port 1(bridge_slave_0) entered blocking state [ 362.353247][ T9892] bridge0: port 1(bridge_slave_0) entered forwarding state [ 362.377861][ T9892] 8021q: adding VLAN 0 to HW filter on device bond0 [ 362.388904][ T9894] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 362.407353][ T9894] bridge0: port 1(bridge_slave_0) entered disabled state [ 362.414934][ T9894] bridge0: port 2(bridge_slave_1) entered disabled state [ 362.422827][ T9894] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 362.432851][ T9892] 8021q: adding VLAN 0 to HW filter on device team0 [ 362.442303][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 362.450766][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 362.457823][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 362.476012][ T9892] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 362.487008][ T9892] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 362.498993][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 362.507403][ T22] bridge0: port 2(bridge_slave_1) entered blocking state [ 362.514426][ T22] bridge0: port 2(bridge_slave_1) entered forwarding state [ 362.522338][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 362.532498][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 362.540760][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 362.548870][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 362.557023][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 362.564487][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready executing program [ 362.578397][ T9892] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 467.696309][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 467.702955][ C1] rcu: 1-...!: (10499 ticks this GP) idle=362/1/0x4000000000000002 softirq=8917/8918 fqs=37 [ 467.713165][ C1] (t=10500 jiffies g=9533 q=42) [ 467.718081][ C1] rcu: rcu_preempt kthread starved for 10426 jiffies! g9533 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 [ 467.729334][ C1] rcu: RCU grace-period kthread stack dump: [ 467.735199][ C1] rcu_preempt I29520 10 2 0x80004000 [ 467.741508][ C1] Call Trace: [ 467.744848][ C1] __schedule+0x755/0x1580 [ 467.749258][ C1] ? __sched_text_start+0x8/0x8 [ 467.754100][ C1] schedule+0xd9/0x260 [ 467.758156][ C1] schedule_timeout+0x486/0xc50 [ 467.762983][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 467.767900][ C1] ? usleep_range+0x170/0x170 [ 467.772553][ C1] ? trace_hardirqs_on+0x67/0x240 [ 467.777552][ C1] ? __kasan_check_read+0x11/0x20 [ 467.782565][ C1] ? __next_timer_interrupt+0x1a0/0x1a0 [ 467.788093][ C1] ? swake_up_one+0x60/0x60 [ 467.792582][ C1] rcu_gp_kthread+0x9b2/0x18c0 [ 467.797327][ C1] ? rcu_barrier+0x310/0x310 [ 467.801894][ C1] ? trace_hardirqs_on+0x67/0x240 [ 467.806897][ C1] ? __kasan_check_read+0x11/0x20 [ 467.811904][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 467.818120][ C1] ? __kthread_parkme+0x108/0x1c0 [ 467.823120][ C1] ? __kasan_check_read+0x11/0x20 [ 467.828120][ C1] kthread+0x361/0x430 [ 467.832169][ C1] ? rcu_barrier+0x310/0x310 [ 467.836736][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 467.842954][ C1] ret_from_fork+0x24/0x30 [ 467.847373][ C1] NMI backtrace for cpu 1 [ 467.851680][ C1] CPU: 1 PID: 22 Comm: kworker/1:1 Not tainted 5.3.0-rc8+ #0 [ 467.859027][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 467.869139][ C1] Workqueue: ipv6_addrconf addrconf_dad_work [ 467.875092][ C1] Call Trace: [ 467.878352][ C1] [ 467.881208][ C1] dump_stack+0x172/0x1f0 [ 467.885519][ C1] nmi_cpu_backtrace.cold+0x70/0xb2 [ 467.890696][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 467.896925][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 467.902545][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 467.908514][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 467.914991][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 467.920082][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 467.925606][ C1] ? raise_softirq+0x138/0x340 [ 467.930356][ C1] update_process_times+0x32/0x80 [ 467.935357][ C1] tick_sched_handle+0xa2/0x190 [ 467.940187][ C1] tick_sched_timer+0x53/0x140 [ 467.944957][ C1] __hrtimer_run_queues+0x364/0xe40 [ 467.950132][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 467.955396][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 467.961191][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 467.966888][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 467.972931][ C1] hrtimer_interrupt+0x314/0x770 [ 467.977895][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 467.983432][ C1] apic_timer_interrupt+0xf/0x20 [ 467.988340][ C1] [ 467.991284][ C1] RIP: 0010:hhf_dequeue+0x58/0xa20 [ 467.996385][ C1] Code: 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 5f 1a ac fb 48 8b 45 c0 80 38 00 <0f> 85 a8 07 00 00 48 8b 75 d0 49 8b 85 80 03 00 00 49 89 f6 48 39 [ 468.015975][ C1] RSP: 0018:ffff8880a9a4ed58 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 468.024383][ C1] RAX: ffffed1014149628 RBX: ffff8880a0a4b0b8 RCX: ffffffff85c660f9 [ 468.032339][ C1] RDX: 0000000000000000 RSI: ffffffff85c65ad1 RDI: ffff8880a0a4b0c0 [ 468.040301][ C1] RBP: ffff8880a9a4eda8 R08: ffff8880a9a3a5c0 R09: 0000000000000000 [ 468.048260][ C1] R10: fffffbfff134afaf R11: ffff8880a9a3a5c0 R12: dffffc0000000000 [ 468.056209][ C1] R13: ffff8880a0a4adc0 R14: ffff8880a0a4b158 R15: ffff8880a0a4b150 [ 468.064186][ C1] ? hhf_dequeue+0x679/0xa20 [ 468.068753][ C1] ? hhf_dequeue+0x51/0xa20 [ 468.073237][ C1] ? hhf_dequeue+0x51/0xa20 [ 468.077828][ C1] __qdisc_run+0x1e7/0x19d0 [ 468.082334][ C1] ? dev_queue_xmit+0x18/0x20 [ 468.086995][ C1] __dev_queue_xmit+0x16f1/0x3650 [ 468.091999][ C1] ? __local_bh_enable_ip+0x15a/0x270 [ 468.097352][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 468.102624][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 468.108870][ C1] ? br_nf_post_routing+0xd73/0x1d30 [ 468.114156][ C1] ? br_forward_finish+0x235/0x400 [ 468.119267][ C1] ? __kasan_check_read+0x11/0x20 [ 468.124303][ C1] ? __dev_queue_xmit+0x2b15/0x3650 [ 468.129489][ C1] dev_queue_xmit+0x18/0x20 [ 468.133976][ C1] ? dev_queue_xmit+0x18/0x20 [ 468.138650][ C1] br_dev_queue_push_xmit+0x3f3/0x5c0 [ 468.144076][ C1] ? nf_hook_slow+0xf0/0x1e0 [ 468.149081][ C1] br_forward_finish+0xfa/0x400 [ 468.153911][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 468.160153][ C1] ? br_fdb_add.cold+0x8c/0x8c [ 468.164986][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 468.170687][ C1] ? nf_hook_slow+0xf0/0x1e0 [ 468.175258][ C1] __br_forward+0x641/0xb00 [ 468.179752][ C1] ? br_forward_finish+0x400/0x400 [ 468.184850][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 468.190377][ C1] deliver_clone+0x61/0xc0 [ 468.194773][ C1] maybe_deliver+0x2c7/0x390 [ 468.199474][ C1] br_flood+0x13a/0x3d0 [ 468.203680][ C1] br_dev_xmit+0x98c/0x15a0 [ 468.208172][ C1] ? br_poll_controller+0x10/0x10 [ 468.213184][ C1] ? netif_skb_features+0x6c2/0xb90 [ 468.218397][ C1] ? netdev_set_sb_channel+0xe0/0xe0 [ 468.223673][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 468.229927][ C1] ? validate_xmit_xfrm+0x43c/0xf10 [ 468.235105][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 468.240021][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 468.246253][ C1] dev_hard_start_xmit+0x1a3/0x9c0 [ 468.251346][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 468.257573][ C1] __dev_queue_xmit+0x2b15/0x3650 [ 468.262792][ C1] ? ndisc_constructor+0x1a5/0xb40 [ 468.267896][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 468.273163][ C1] ? ip6_finish_output2+0x1034/0x2520 [ 468.278512][ C1] ? __kasan_check_read+0x11/0x20 [ 468.283518][ C1] ? lock_downgrade+0x920/0x920 [ 468.288353][ C1] dev_queue_xmit+0x18/0x20 [ 468.292832][ C1] ? dev_queue_xmit+0x18/0x20 [ 468.297520][ C1] neigh_resolve_output+0x5a5/0x970 [ 468.302702][ C1] ip6_finish_output2+0x1034/0x2520 [ 468.307880][ C1] ? ip6_forward_finish+0x530/0x530 [ 468.313057][ C1] ? lock_downgrade+0x920/0x920 [ 468.317885][ C1] ? ip6_mtu+0x16f/0x460 [ 468.322109][ C1] __ip6_finish_output+0x444/0xa50 [ 468.327197][ C1] ? __ip6_finish_output+0x444/0xa50 [ 468.332468][ C1] ip6_finish_output+0x38/0x1f0 [ 468.337306][ C1] ip6_output+0x235/0x7c0 [ 468.341614][ C1] ? ip6_finish_output+0x1f0/0x1f0 [ 468.346704][ C1] ? __ip6_finish_output+0xa50/0xa50 [ 468.351966][ C1] ? ndisc_send_skb+0x803/0x1450 [ 468.356886][ C1] ndisc_send_skb+0xf29/0x1450 [ 468.361628][ C1] ? nf_hook.constprop.0+0x560/0x560 [ 468.366936][ C1] ? skb_set_owner_w+0x21b/0x320 [ 468.371865][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 468.377574][ C1] ndisc_send_ns+0x3a9/0x850 [ 468.382147][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 468.388368][ C1] ? ndisc_netdev_event+0x4e0/0x4e0 [ 468.393558][ C1] ? addrconf_dad_work+0xac4/0x1150 [ 468.398735][ C1] ? trace_hardirqs_on+0x67/0x240 [ 468.403755][ C1] ? addrconf_dad_work+0xac4/0x1150 [ 468.408937][ C1] addrconf_dad_work+0xb88/0x1150 [ 468.413944][ C1] ? addrconf_dad_completed+0xbb0/0xbb0 [ 468.419468][ C1] ? lock_acquire+0x190/0x410 [ 468.424124][ C1] ? trace_hardirqs_on+0x67/0x240 [ 468.429133][ C1] process_one_work+0x9af/0x1740 [ 468.434053][ C1] ? pwq_dec_nr_in_flight+0x320/0x320 [ 468.439468][ C1] ? lock_acquire+0x190/0x410 [ 468.444129][ C1] worker_thread+0x98/0xe40 [ 468.448614][ C1] kthread+0x361/0x430 [ 468.452661][ C1] ? process_one_work+0x1740/0x1740 [ 468.457838][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 468.464057][ C1] ret_from_fork+0x24/0x30