[ 63.539687][ T26] audit: type=1800 audit(1568194800.038:27): pid=9756 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 63.560424][ T26] audit: type=1800 audit(1568194800.048:28): pid=9756 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. [ 64.139575][ T26] audit: type=1800 audit(1568194800.718:29): pid=9756 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 [ 64.159829][ T26] audit: type=1800 audit(1568194800.728:30): pid=9756 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: [ 228.671280][ T9906] IPVS: ftp: loaded support on port[0] = 21 [ 228.729576][ T9906] chnl_net:caif_netlink_parms(): no params data found [ 228.751305][ T9906] bridge0: port 1(bridge_slave_0) entered blocking state [ 228.758665][ T9906] bridge0: port 1(bridge_slave_0) entered disabled state [ 228.766575][ T9906] device bridge_slave_0 entered promiscuous mode [ 228.773872][ T9906] bridge0: port 2(bridge_slave_1) entered blocking state [ 228.781056][ T9906] bridge0: port 2(bridge_slave_1) entered disabled state [ 228.788718][ T9906] device bridge_slave_1 entered promiscuous mode [ 228.801772][ T9906] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 228.813098][ T9906] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 228.829253][ T9906] team0: Port device team_slave_0 added [ 228.836962][ T9906] team0: Port device team_slave_1 added [ 228.904173][ T9906] device hsr_slave_0 entered promiscuous mode [ 228.962850][ T9906] device hsr_slave_1 entered promiscuous mode [ 229.007957][ T9906] bridge0: port 2(bridge_slave_1) entered blocking state [ 229.015187][ T9906] bridge0: port 2(bridge_slave_1) entered forwarding state [ 229.023743][ T9906] bridge0: port 1(bridge_slave_0) entered blocking state [ 229.030802][ T9906] bridge0: port 1(bridge_slave_0) entered forwarding state [ 229.055216][ T9906] 8021q: adding VLAN 0 to HW filter on device bond0 [ 229.065488][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 229.084608][ T23] bridge0: port 1(bridge_slave_0) entered disabled state [ 229.092070][ T23] bridge0: port 2(bridge_slave_1) entered disabled state [ 229.100034][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 229.110185][ T9906] 8021q: adding VLAN 0 to HW filter on device team0 [ 229.119493][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 229.128032][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 229.135101][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 229.153186][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 229.161715][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 229.168827][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 229.176795][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 229.185309][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 229.194064][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 229.202630][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready executing program [ 229.211803][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 229.221689][ T9906] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 229.236399][ T9906] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 334.252419][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 334.259055][ C1] rcu: 1-...!: (10499 ticks this GP) idle=6ce/1/0x4000000000000002 softirq=10155/10155 fqs=41 [ 334.269460][ C1] (t=10501 jiffies g=9517 q=131) [ 334.274465][ C1] rcu: rcu_preempt kthread starved for 10420 jiffies! g9517 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 [ 334.285715][ C1] rcu: RCU grace-period kthread stack dump: [ 334.291735][ C1] rcu_preempt I29328 10 2 0x80004000 [ 334.298072][ C1] Call Trace: [ 334.301436][ C1] __schedule+0x755/0x1580 [ 334.305838][ C1] ? __sched_text_start+0x8/0x8 [ 334.310669][ C1] schedule+0xd9/0x260 [ 334.314719][ C1] schedule_timeout+0x486/0xc50 [ 334.319561][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 334.324480][ C1] ? usleep_range+0x170/0x170 [ 334.329145][ C1] ? trace_hardirqs_on+0x67/0x240 [ 334.334151][ C1] ? __kasan_check_read+0x11/0x20 [ 334.339159][ C1] ? __next_timer_interrupt+0x1a0/0x1a0 [ 334.344699][ C1] ? swake_up_one+0x60/0x60 [ 334.349187][ C1] rcu_gp_kthread+0x9b2/0x18c0 [ 334.353935][ C1] ? rcu_barrier+0x310/0x310 [ 334.360677][ C1] ? trace_hardirqs_on+0x67/0x240 [ 334.365684][ C1] ? __kasan_check_read+0x11/0x20 [ 334.370695][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 334.376918][ C1] ? __kthread_parkme+0x108/0x1c0 [ 334.381921][ C1] ? __kasan_check_read+0x11/0x20 [ 334.386939][ C1] kthread+0x361/0x430 [ 334.390994][ C1] ? rcu_barrier+0x310/0x310 [ 334.395568][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 334.401787][ C1] ret_from_fork+0x24/0x30 [ 334.406211][ C1] NMI backtrace for cpu 1 [ 334.410537][ C1] CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.3.0-rc8+ #0 [ 334.417882][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 334.428020][ C1] Workqueue: ipv6_addrconf addrconf_dad_work [ 334.433979][ C1] Call Trace: [ 334.437240][ C1] [ 334.440103][ C1] dump_stack+0x172/0x1f0 [ 334.444417][ C1] nmi_cpu_backtrace.cold+0x70/0xb2 [ 334.449602][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 334.455829][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 334.461440][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 334.467405][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 334.474407][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 334.479500][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 334.485115][ C1] ? raise_softirq+0x138/0x340 [ 334.489865][ C1] update_process_times+0x32/0x80 [ 334.494878][ C1] tick_sched_handle+0xa2/0x190 [ 334.499708][ C1] tick_sched_timer+0x53/0x140 [ 334.504886][ C1] __hrtimer_run_queues+0x364/0xe40 [ 334.510067][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 334.515335][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 334.520872][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 334.526584][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 334.532638][ C1] hrtimer_interrupt+0x314/0x770 [ 334.537742][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 334.543279][ C1] apic_timer_interrupt+0xf/0x20 [ 334.548195][ C1] [ 334.551122][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x50 [ 334.557169][ C1] Code: 19 09 41 bc f4 ff ff ff e8 6d 9f e9 ff 48 c7 05 1e 4d 19 09 00 00 00 00 e9 77 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 04 89 8f 7e 81 e2 00 01 1f 00 [ 334.576766][ C1] RSP: 0018:ffff8880a99173e8 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff13 [ 334.585163][ C1] RAX: ffff888090ac6c28 RBX: ffff888090ac6c38 RCX: ffffffff85c65b39 [ 334.593115][ C1] RDX: ffff888090ac6c00 RSI: ffffffff85c65fb7 RDI: 0000000000000005 [ 334.601067][ C1] RBP: ffff8880a99173e8 R08: ffff8880a9906480 R09: 0000000000000000 [ 334.609019][ C1] R10: fffffbfff134afaf R11: ffff8880a9906480 R12: dffffc0000000000 [ 334.616986][ C1] R13: ffff888090ac6940 R14: 0000000000000001 R15: 0000000000000000 [ 334.625015][ C1] ? hhf_dequeue+0xb9/0xa20 [ 334.630456][ C1] ? hhf_dequeue+0x537/0xa20 [ 334.635041][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 334.641272][ C1] hhf_dequeue+0x552/0xa20 [ 334.645720][ C1] __qdisc_run+0x1e7/0x19d0 [ 334.650230][ C1] ? dev_queue_xmit+0x18/0x20 [ 334.654893][ C1] __dev_queue_xmit+0x16f1/0x3650 [ 334.659921][ C1] ? ndisc_constructor+0x1a5/0xb40 [ 334.665010][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 334.670279][ C1] ? ip6_finish_output2+0x1034/0x2520 [ 334.675631][ C1] ? __kasan_check_read+0x11/0x20 [ 334.680815][ C1] ? lock_downgrade+0x920/0x920 [ 334.685649][ C1] dev_queue_xmit+0x18/0x20 [ 334.690134][ C1] ? dev_queue_xmit+0x18/0x20 [ 334.694859][ C1] neigh_resolve_output+0x5a5/0x970 [ 334.700045][ C1] ip6_finish_output2+0x1034/0x2520 [ 334.705227][ C1] ? ip6_mtu+0x2e6/0x460 [ 334.709455][ C1] ? ip6_forward_finish+0x530/0x530 [ 334.714724][ C1] ? lock_downgrade+0x920/0x920 [ 334.719559][ C1] ? ip6_mtu+0x16f/0x460 [ 334.723787][ C1] __ip6_finish_output+0x444/0xa50 [ 334.729014][ C1] ? __ip6_finish_output+0x444/0xa50 [ 334.734373][ C1] ip6_finish_output+0x38/0x1f0 [ 334.739215][ C1] ip6_output+0x235/0x7c0 [ 334.743528][ C1] ? ip6_finish_output+0x1f0/0x1f0 [ 334.749232][ C1] ? __ip6_finish_output+0xa50/0xa50 [ 334.754500][ C1] ? ndisc_send_skb+0x803/0x1450 [ 334.759422][ C1] ndisc_send_skb+0xf29/0x1450 [ 334.764169][ C1] ? nf_hook.constprop.0+0x560/0x560 [ 334.769515][ C1] ? skb_set_owner_w+0x21b/0x320 [ 334.774438][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 334.780144][ C1] ndisc_send_ns+0x3a9/0x850 [ 334.784713][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 334.790938][ C1] ? ndisc_netdev_event+0x4e0/0x4e0 [ 334.796118][ C1] ? addrconf_dad_work+0xac4/0x1150 [ 334.801382][ C1] ? trace_hardirqs_on+0x67/0x240 [ 334.806385][ C1] ? addrconf_dad_work+0xac4/0x1150 [ 334.811566][ C1] addrconf_dad_work+0xb88/0x1150 [ 334.816573][ C1] ? addrconf_dad_completed+0xbb0/0xbb0 [ 334.822117][ C1] ? lock_acquire+0x190/0x410 [ 334.826772][ C1] ? trace_hardirqs_on+0x67/0x240 [ 334.831780][ C1] process_one_work+0x9af/0x1740 [ 334.838186][ C1] ? pwq_dec_nr_in_flight+0x320/0x320 [ 334.843551][ C1] ? lock_acquire+0x190/0x410 [ 334.848211][ C1] worker_thread+0x98/0xe40 [ 334.852698][ C1] kthread+0x361/0x430 [ 334.856747][ C1] ? process_one_work+0x1740/0x1740 [ 334.861929][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 334.868164][ C1] ret_from_fork+0x24/0x30