[ 63.998451][ T26] audit: type=1800 audit(1568380145.346:27): pid=9707 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 64.020560][ T26] audit: type=1800 audit(1568380145.356:28): pid=9707 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. [ 64.603321][ T26] audit: type=1800 audit(1568380145.996:29): pid=9707 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 [ 64.624426][ T26] audit: type=1800 audit(1568380145.996:30): pid=9707 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 '10.128.0.47' (ECDSA) to the list of known hosts. syzkaller login: [ 259.499020][ T9859] IPVS: ftp: loaded support on port[0] = 21 [ 259.545983][ T9859] chnl_net:caif_netlink_parms(): no params data found [ 259.567411][ T9859] bridge0: port 1(bridge_slave_0) entered blocking state [ 259.574743][ T9859] bridge0: port 1(bridge_slave_0) entered disabled state [ 259.582287][ T9859] device bridge_slave_0 entered promiscuous mode [ 259.589401][ T9859] bridge0: port 2(bridge_slave_1) entered blocking state [ 259.596806][ T9859] bridge0: port 2(bridge_slave_1) entered disabled state [ 259.604588][ T9859] device bridge_slave_1 entered promiscuous mode [ 259.618732][ T9859] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 259.629559][ T9859] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 259.646295][ T9859] team0: Port device team_slave_0 added [ 259.653358][ T9859] team0: Port device team_slave_1 added [ 259.733730][ T9859] device hsr_slave_0 entered promiscuous mode [ 259.802594][ T9859] device hsr_slave_1 entered promiscuous mode [ 259.878116][ T9859] bridge0: port 2(bridge_slave_1) entered blocking state [ 259.885549][ T9859] bridge0: port 2(bridge_slave_1) entered forwarding state [ 259.893031][ T9859] bridge0: port 1(bridge_slave_0) entered blocking state [ 259.900292][ T9859] bridge0: port 1(bridge_slave_0) entered forwarding state [ 259.924453][ T9859] 8021q: adding VLAN 0 to HW filter on device bond0 [ 259.935595][ T3515] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 259.954189][ T3515] bridge0: port 1(bridge_slave_0) entered disabled state [ 259.962368][ T3515] bridge0: port 2(bridge_slave_1) entered disabled state [ 259.970398][ T3515] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 259.980890][ T9859] 8021q: adding VLAN 0 to HW filter on device team0 [ 259.990514][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 259.999057][ T23] bridge0: port 1(bridge_slave_0) entered blocking state [ 260.006583][ T23] bridge0: port 1(bridge_slave_0) entered forwarding state [ 260.016441][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 260.026184][ T12] bridge0: port 2(bridge_slave_1) entered blocking state [ 260.033274][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state [ 260.050653][ T9859] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 260.062567][ T9859] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 260.075167][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 260.084331][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 260.092821][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 260.102761][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 260.111212][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 260.118918][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready executing program [ 260.132998][ T9859] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 365.182145][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 365.188773][ C0] rcu: 0-...!: (10500 ticks this GP) idle=3e2/1/0x4000000000000002 softirq=9716/9716 fqs=0 [ 365.198893][ C0] (t=10500 jiffies g=9013 q=108) [ 365.203891][ C0] rcu: rcu_preempt kthread starved for 10500 jiffies! g9013 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 [ 365.215220][ C0] rcu: RCU grace-period kthread stack dump: [ 365.221081][ C0] rcu_preempt I29392 10 2 0x80004000 [ 365.227386][ C0] Call Trace: [ 365.230718][ C0] __schedule+0x755/0x1580 [ 365.235116][ C0] ? __sched_text_start+0x8/0x8 [ 365.239966][ C0] schedule+0xd9/0x260 [ 365.244024][ C0] schedule_timeout+0x486/0xc50 [ 365.248946][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 365.254024][ C0] ? usleep_range+0x170/0x170 [ 365.258679][ C0] ? trace_hardirqs_on+0x67/0x240 [ 365.263680][ C0] ? __kasan_check_read+0x11/0x20 [ 365.268686][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 365.274214][ C0] ? swake_up_one+0x60/0x60 [ 365.278694][ C0] ? trace_hardirqs_on+0x67/0x240 [ 365.283695][ C0] rcu_gp_kthread+0x9b2/0x18c0 [ 365.288462][ C0] ? rcu_barrier+0x310/0x310 [ 365.293026][ C0] ? trace_hardirqs_on+0x67/0x240 [ 365.298023][ C0] ? __kasan_check_read+0x11/0x20 [ 365.303025][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 365.309237][ C0] ? __kthread_parkme+0x108/0x1c0 [ 365.314235][ C0] ? __kasan_check_read+0x11/0x20 [ 365.319233][ C0] kthread+0x361/0x430 [ 365.323279][ C0] ? rcu_barrier+0x310/0x310 [ 365.327862][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 365.334092][ C0] ret_from_fork+0x24/0x30 [ 365.338521][ C0] NMI backtrace for cpu 0 [ 365.342833][ C0] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.3.0-rc8+ #0 [ 365.350176][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 365.360283][ C0] Workqueue: ipv6_addrconf addrconf_dad_work [ 365.366246][ C0] Call Trace: [ 365.369509][ C0] [ 365.372392][ C0] dump_stack+0x172/0x1f0 [ 365.376711][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 365.381900][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 365.388123][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 365.393733][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 365.399713][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 365.405583][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 365.410673][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 365.416195][ C0] ? raise_softirq+0x138/0x340 [ 365.420941][ C0] update_process_times+0x32/0x80 [ 365.425948][ C0] tick_sched_handle+0xa2/0x190 [ 365.430775][ C0] tick_sched_timer+0x53/0x140 [ 365.435520][ C0] __hrtimer_run_queues+0x364/0xe40 [ 365.440709][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 365.445975][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 365.451509][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 365.457206][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 365.463250][ C0] hrtimer_interrupt+0x314/0x770 [ 365.468205][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 365.473732][ C0] apic_timer_interrupt+0xf/0x20 [ 365.478668][ C0] [ 365.481588][ C0] RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x11/0x20 [ 365.488418][ C0] Code: bf 06 00 00 00 48 89 e5 48 8b 4d 08 e8 18 ff ff ff 5d c3 66 0f 1f 44 00 00 55 40 0f b6 d6 40 0f b6 f7 bf 01 00 00 00 48 89 e5 <48> 8b 4d 08 e8 f6 fe ff ff 5d c3 0f 1f 40 00 55 0f b7 d6 0f b7 f7 [ 365.508012][ C0] RSP: 0018:ffff8880a98d6d48 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 365.516400][ C0] RAX: 0000000000000001 RBX: ffff888091185e38 RCX: ffffffff85c66051 [ 365.524352][ C0] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000001 [ 365.532302][ C0] RBP: ffff8880a98d6d48 R08: ffff8880a98c2300 R09: 0000000000000000 [ 365.540253][ C0] R10: fffffbfff134afaf R11: ffff8880a98c2300 R12: dffffc0000000000 [ 365.548202][ C0] R13: ffff888091185b40 R14: ffff888091185ed8 R15: ffff888091185ed0 [ 365.556199][ C0] ? hhf_dequeue+0x5d1/0xa20 [ 365.560773][ C0] hhf_dequeue+0x679/0xa20 [ 365.565207][ C0] __qdisc_run+0x1e7/0x19d0 [ 365.569710][ C0] ? dev_queue_xmit+0x18/0x20 [ 365.574368][ C0] __dev_queue_xmit+0x16f1/0x3650 [ 365.579372][ C0] ? __local_bh_enable_ip+0x15a/0x270 [ 365.584726][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 365.590006][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 365.596251][ C0] ? br_nf_post_routing+0xd73/0x1d30 [ 365.601538][ C0] ? br_forward_finish+0x235/0x400 [ 365.606629][ C0] ? __kasan_check_read+0x11/0x20 [ 365.611633][ C0] ? __dev_queue_xmit+0x2b15/0x3650 [ 365.616816][ C0] dev_queue_xmit+0x18/0x20 [ 365.621333][ C0] ? dev_queue_xmit+0x18/0x20 [ 365.626000][ C0] br_dev_queue_push_xmit+0x3f3/0x5c0 [ 365.631418][ C0] ? nf_hook_slow+0xf0/0x1e0 [ 365.635988][ C0] br_forward_finish+0xfa/0x400 [ 365.640815][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 365.646339][ C0] ? br_fdb_add.cold+0x8c/0x8c [ 365.651173][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 365.656871][ C0] ? nf_hook_slow+0xf0/0x1e0 [ 365.661440][ C0] __br_forward+0x641/0xb00 [ 365.665974][ C0] ? br_forward_finish+0x400/0x400 [ 365.671081][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 365.676606][ C0] deliver_clone+0x61/0xc0 [ 365.681003][ C0] maybe_deliver+0x2c7/0x390 [ 365.685570][ C0] br_flood+0x13a/0x3d0 [ 365.689755][ C0] br_dev_xmit+0x98c/0x15a0 [ 365.694258][ C0] ? br_poll_controller+0x10/0x10 [ 365.699260][ C0] ? netif_skb_features+0x6c2/0xb90 [ 365.704639][ C0] ? netdev_set_sb_channel+0xe0/0xe0 [ 365.709977][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 365.716284][ C0] ? validate_xmit_xfrm+0x43c/0xf10 [ 365.721474][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 365.726398][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 365.732625][ C0] dev_hard_start_xmit+0x1a3/0x9c0 [ 365.737719][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 365.743940][ C0] __dev_queue_xmit+0x2b15/0x3650 [ 365.748987][ C0] ? ndisc_constructor+0x1a5/0xb40 [ 365.754081][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 365.759351][ C0] ? ip6_finish_output2+0x1034/0x2520 [ 365.764700][ C0] ? __kasan_check_read+0x11/0x20 [ 365.769705][ C0] ? lock_downgrade+0x920/0x920 [ 365.774538][ C0] dev_queue_xmit+0x18/0x20 [ 365.779020][ C0] ? dev_queue_xmit+0x18/0x20 [ 365.783704][ C0] neigh_resolve_output+0x5a5/0x970 [ 365.788907][ C0] ip6_finish_output2+0x1034/0x2520 [ 365.794087][ C0] ? ip6_forward_finish+0x530/0x530 [ 365.799264][ C0] ? lock_downgrade+0x920/0x920 [ 365.804093][ C0] ? ip6_mtu+0x16f/0x460 [ 365.808318][ C0] __ip6_finish_output+0x444/0xa50 [ 365.813406][ C0] ? __ip6_finish_output+0x444/0xa50 [ 365.818682][ C0] ip6_finish_output+0x38/0x1f0 [ 365.823964][ C0] ip6_output+0x235/0x7c0 [ 365.828292][ C0] ? ip6_finish_output+0x1f0/0x1f0 [ 365.833404][ C0] ? __ip6_finish_output+0xa50/0xa50 [ 365.838802][ C0] ? ndisc_send_skb+0x803/0x1450 [ 365.843744][ C0] ndisc_send_skb+0xf29/0x1450 [ 365.848499][ C0] ? nf_hook.constprop.0+0x560/0x560 [ 365.853824][ C0] ? skb_set_owner_w+0x21b/0x320 [ 365.858766][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 365.864485][ C0] ndisc_send_ns+0x3a9/0x850 [ 365.869077][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 365.875315][ C0] ? ndisc_netdev_event+0x4e0/0x4e0 [ 365.880510][ C0] ? addrconf_dad_work+0xac4/0x1150 [ 365.885686][ C0] ? trace_hardirqs_on+0x67/0x240 [ 365.890689][ C0] ? addrconf_dad_work+0xac4/0x1150 [ 365.895870][ C0] addrconf_dad_work+0xb88/0x1150 [ 365.900878][ C0] ? addrconf_dad_completed+0xbb0/0xbb0 [ 365.906401][ C0] ? lock_acquire+0x190/0x410 [ 365.911081][ C0] ? trace_hardirqs_on+0x67/0x240 [ 365.916093][ C0] process_one_work+0x9af/0x1740 [ 365.921012][ C0] ? pwq_dec_nr_in_flight+0x320/0x320 [ 365.926373][ C0] ? lock_acquire+0x190/0x410 [ 365.931044][ C0] worker_thread+0x98/0xe40 [ 365.935530][ C0] kthread+0x361/0x430 [ 365.939582][ C0] ? process_one_work+0x1740/0x1740 [ 365.944770][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 365.950991][ C0] ret_from_fork+0x24/0x30