[ 68.183046][ T26] audit: type=1800 audit(1568494210.071:27): pid=9828 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 68.205698][ T26] audit: type=1800 audit(1568494210.071:28): pid=9828 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. [ 68.707975][ T26] audit: type=1800 audit(1568494210.651:29): pid=9828 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 [ 68.729700][ T26] audit: type=1800 audit(1568494210.661:30): pid=9828 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 '10.128.0.30' (ECDSA) to the list of known hosts. syzkaller login: [ 195.727701][ T9982] IPVS: ftp: loaded support on port[0] = 21 [ 195.775452][ T9982] chnl_net:caif_netlink_parms(): no params data found [ 195.796419][ T9982] bridge0: port 1(bridge_slave_0) entered blocking state [ 195.803945][ T9982] bridge0: port 1(bridge_slave_0) entered disabled state [ 195.811469][ T9982] device bridge_slave_0 entered promiscuous mode [ 195.818650][ T9982] bridge0: port 2(bridge_slave_1) entered blocking state [ 195.825788][ T9982] bridge0: port 2(bridge_slave_1) entered disabled state [ 195.833334][ T9982] device bridge_slave_1 entered promiscuous mode [ 195.846280][ T9982] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 195.856796][ T9982] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 195.872882][ T9982] team0: Port device team_slave_0 added [ 195.879700][ T9982] team0: Port device team_slave_1 added [ 195.940970][ T9982] device hsr_slave_0 entered promiscuous mode [ 196.009069][ T9982] device hsr_slave_1 entered promiscuous mode [ 196.094398][ T9982] bridge0: port 2(bridge_slave_1) entered blocking state [ 196.101681][ T9982] bridge0: port 2(bridge_slave_1) entered forwarding state [ 196.109032][ T9982] bridge0: port 1(bridge_slave_0) entered blocking state [ 196.116192][ T9982] bridge0: port 1(bridge_slave_0) entered forwarding state [ 196.140168][ T9982] 8021q: adding VLAN 0 to HW filter on device bond0 [ 196.151466][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 196.160790][ T17] bridge0: port 1(bridge_slave_0) entered disabled state [ 196.168390][ T17] bridge0: port 2(bridge_slave_1) entered disabled state [ 196.176296][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 196.186225][ T9982] 8021q: adding VLAN 0 to HW filter on device team0 [ 196.196014][ T3571] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 196.204594][ T3571] bridge0: port 1(bridge_slave_0) entered blocking state [ 196.211803][ T3571] bridge0: port 1(bridge_slave_0) entered forwarding state [ 196.221465][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 196.230123][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 196.237215][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 196.254686][ T9982] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 196.266201][ T9982] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 196.278543][ T3571] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 196.287703][ T3571] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 196.296266][ T3571] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready executing program [ 196.304433][ T3571] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 196.313231][ T3571] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 196.320797][ T3571] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 196.334743][ T9982] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 301.468769][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 301.475406][ C1] rcu: 1-...!: (1 GPs behind) idle=742/1/0x4000000000000002 softirq=10351/10352 fqs=11 [ 301.485179][ C1] (t=10500 jiffies g=9565 q=78) [ 301.490096][ C1] rcu: rcu_preempt kthread starved for 10478 jiffies! g9565 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 [ 301.501341][ C1] rcu: RCU grace-period kthread stack dump: [ 301.507205][ C1] rcu_preempt I29112 10 2 0x80004000 [ 301.513518][ C1] Call Trace: [ 301.516867][ C1] __schedule+0x755/0x1580 [ 301.521266][ C1] ? __sched_text_start+0x8/0x8 [ 301.526097][ C1] schedule+0xd9/0x260 [ 301.530143][ C1] schedule_timeout+0x486/0xc50 [ 301.534973][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 301.539895][ C1] ? usleep_range+0x170/0x170 [ 301.544547][ C1] ? trace_hardirqs_on+0x67/0x240 [ 301.549547][ C1] ? __kasan_check_read+0x11/0x20 [ 301.554551][ C1] ? __next_timer_interrupt+0x1a0/0x1a0 [ 301.560073][ C1] ? swake_up_one+0x60/0x60 [ 301.564555][ C1] rcu_gp_kthread+0x9b2/0x18c0 [ 301.569299][ C1] ? rcu_barrier+0x310/0x310 [ 301.573862][ C1] ? trace_hardirqs_on+0x67/0x240 [ 301.578874][ C1] ? __kasan_check_read+0x11/0x20 [ 301.583889][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 301.590107][ C1] ? __kthread_parkme+0x108/0x1c0 [ 301.595117][ C1] ? __kasan_check_read+0x11/0x20 [ 301.600119][ C1] kthread+0x361/0x430 [ 301.604165][ C1] ? rcu_barrier+0x310/0x310 [ 301.608731][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 301.614954][ C1] ret_from_fork+0x24/0x30 [ 301.619384][ C1] NMI backtrace for cpu 1 [ 301.623712][ C1] CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.3.0-rc8+ #0 [ 301.631055][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 301.641184][ C1] Workqueue: ipv6_addrconf addrconf_dad_work [ 301.647141][ C1] Call Trace: [ 301.650404][ C1] [ 301.653257][ C1] dump_stack+0x172/0x1f0 [ 301.657568][ C1] nmi_cpu_backtrace.cold+0x70/0xb2 [ 301.662768][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 301.669001][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 301.674624][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 301.680584][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 301.686454][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 301.691561][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 301.697098][ C1] ? raise_softirq+0x138/0x340 [ 301.701850][ C1] update_process_times+0x32/0x80 [ 301.706852][ C1] tick_sched_handle+0xa2/0x190 [ 301.711693][ C1] tick_sched_timer+0x53/0x140 [ 301.716435][ C1] __hrtimer_run_queues+0x364/0xe40 [ 301.721611][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 301.726887][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 301.732408][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 301.738115][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 301.744164][ C1] hrtimer_interrupt+0x314/0x770 [ 301.749131][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 301.754657][ C1] apic_timer_interrupt+0xf/0x20 [ 301.759599][ C1] [ 301.762518][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0x4b/0x50 [ 301.768649][ C1] Code: 90 f0 12 00 00 83 fa 02 75 20 48 8b 88 f8 12 00 00 8b 80 f4 12 00 00 48 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 <5d> c3 0f 1f 00 65 4c 8b 04 25 40 fe 01 00 65 8b 05 a8 88 8f 7e a9 [ 301.788233][ C1] RSP: 0018:ffff8880a9916d48 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 [ 301.796631][ C1] RAX: ffff8880a9906480 RBX: ffff88809f94b978 RCX: ffffffff85c66b39 [ 301.804580][ C1] RDX: 0000000000000000 RSI: ffffffff85c66fd2 RDI: 0000000000000005 [ 301.812541][ C1] RBP: ffff8880a9916d48 R08: ffff8880a9906480 R09: 0000000000000000 [ 301.820488][ C1] R10: fffffbfff134afaf R11: ffff8880a9906480 R12: dffffc0000000000 [ 301.828445][ C1] R13: ffff88809f94b680 R14: 0000000000000001 R15: 0000000000000000 [ 301.836447][ C1] ? hhf_dequeue+0xb9/0xa20 [ 301.840928][ C1] ? hhf_dequeue+0x552/0xa20 [ 301.845515][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 301.851747][ C1] hhf_dequeue+0x552/0xa20 [ 301.856190][ C1] __qdisc_run+0x1e7/0x19d0 [ 301.860705][ C1] ? dev_queue_xmit+0x18/0x20 [ 301.865370][ C1] __dev_queue_xmit+0x16f1/0x3650 [ 301.870372][ C1] ? __local_bh_enable_ip+0x15a/0x270 [ 301.875737][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 301.881015][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 301.887267][ C1] ? br_nf_post_routing+0xd73/0x1d30 [ 301.892566][ C1] ? br_forward_finish+0x235/0x400 [ 301.897655][ C1] ? __kasan_check_read+0x11/0x20 [ 301.902659][ C1] ? __dev_queue_xmit+0x2b15/0x3650 [ 301.907840][ C1] dev_queue_xmit+0x18/0x20 [ 301.912322][ C1] ? dev_queue_xmit+0x18/0x20 [ 301.916983][ C1] br_dev_queue_push_xmit+0x3f3/0x5c0 [ 301.922380][ C1] ? nf_hook_slow+0xf0/0x1e0 [ 301.926947][ C1] br_forward_finish+0xfa/0x400 [ 301.931778][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 301.937324][ C1] ? br_fdb_add.cold+0x8c/0x8c [ 301.942069][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 301.947764][ C1] ? nf_hook_slow+0xf0/0x1e0 [ 301.952346][ C1] __br_forward+0x641/0xb00 [ 301.956838][ C1] ? br_forward_finish+0x400/0x400 [ 301.961927][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 301.967451][ C1] deliver_clone+0x61/0xc0 [ 301.971847][ C1] maybe_deliver+0x2c7/0x390 [ 301.976414][ C1] br_flood+0x13a/0x3d0 [ 301.980591][ C1] br_dev_xmit+0x98c/0x15a0 [ 301.985078][ C1] ? br_poll_controller+0x10/0x10 [ 301.990079][ C1] ? netif_skb_features+0x6c2/0xb90 [ 301.995285][ C1] ? netdev_set_sb_channel+0xe0/0xe0 [ 302.000551][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 302.006794][ C1] ? validate_xmit_xfrm+0x43c/0xf10 [ 302.011971][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 302.016885][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 302.023101][ C1] dev_hard_start_xmit+0x1a3/0x9c0 [ 302.028191][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 302.034415][ C1] __dev_queue_xmit+0x2b15/0x3650 [ 302.039453][ C1] ? ndisc_constructor+0x1a5/0xb40 [ 302.044544][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 302.049805][ C1] ? ip6_finish_output2+0x1034/0x2520 [ 302.055155][ C1] ? __kasan_check_read+0x11/0x20 [ 302.060162][ C1] ? lock_downgrade+0x920/0x920 [ 302.064991][ C1] dev_queue_xmit+0x18/0x20 [ 302.069469][ C1] ? dev_queue_xmit+0x18/0x20 [ 302.074160][ C1] neigh_resolve_output+0x5a5/0x970 [ 302.079340][ C1] ip6_finish_output2+0x1034/0x2520 [ 302.084521][ C1] ? ip6_mtu+0x2e6/0x460 [ 302.088743][ C1] ? ip6_forward_finish+0x530/0x530 [ 302.093941][ C1] ? lock_downgrade+0x920/0x920 [ 302.098769][ C1] ? ip6_mtu+0x16f/0x460 [ 302.102991][ C1] __ip6_finish_output+0x444/0xa50 [ 302.108076][ C1] ? __ip6_finish_output+0x444/0xa50 [ 302.113337][ C1] ip6_finish_output+0x38/0x1f0 [ 302.118168][ C1] ip6_output+0x235/0x7c0 [ 302.122474][ C1] ? ip6_finish_output+0x1f0/0x1f0 [ 302.127562][ C1] ? __ip6_finish_output+0xa50/0xa50 [ 302.132824][ C1] ? ndisc_send_skb+0x803/0x1450 [ 302.137742][ C1] ndisc_send_skb+0xf29/0x1450 [ 302.142489][ C1] ? nf_hook.constprop.0+0x560/0x560 [ 302.147793][ C1] ? skb_set_owner_w+0x21b/0x320 [ 302.152711][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 302.158417][ C1] ndisc_send_ns+0x3a9/0x850 [ 302.162990][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 302.169209][ C1] ? ndisc_netdev_event+0x4e0/0x4e0 [ 302.174386][ C1] ? addrconf_dad_work+0xac4/0x1150 [ 302.179558][ C1] ? trace_hardirqs_on+0x67/0x240 [ 302.184557][ C1] ? addrconf_dad_work+0xac4/0x1150 [ 302.189733][ C1] addrconf_dad_work+0xb88/0x1150 [ 302.194751][ C1] ? addrconf_dad_completed+0xbb0/0xbb0 [ 302.200271][ C1] ? lock_acquire+0x190/0x410 [ 302.204946][ C1] ? trace_hardirqs_on+0x67/0x240 [ 302.209958][ C1] process_one_work+0x9af/0x1740 [ 302.214887][ C1] ? pwq_dec_nr_in_flight+0x320/0x320 [ 302.220243][ C1] ? lock_acquire+0x190/0x410 [ 302.224905][ C1] worker_thread+0x98/0xe40 [ 302.229403][ C1] kthread+0x361/0x430 [ 302.233452][ C1] ? process_one_work+0x1740/0x1740 [ 302.238638][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 302.244868][ C1] ret_from_fork+0x24/0x30