[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 59.125923][ T25] audit: type=1800 audit(1568413189.621:25): pid=8719 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 59.147442][ T25] audit: type=1800 audit(1568413189.631:26): pid=8719 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 59.168747][ T25] audit: type=1800 audit(1568413189.631:27): pid=8719 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 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. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.203' (ECDSA) to the list of known hosts. syzkaller login: [ 267.279964][ T8873] IPVS: ftp: loaded support on port[0] = 21 [ 267.345658][ T8873] chnl_net:caif_netlink_parms(): no params data found [ 267.375363][ T8873] bridge0: port 1(bridge_slave_0) entered blocking state [ 267.383944][ T8873] bridge0: port 1(bridge_slave_0) entered disabled state [ 267.391991][ T8873] device bridge_slave_0 entered promiscuous mode [ 267.400608][ T8873] bridge0: port 2(bridge_slave_1) entered blocking state [ 267.407842][ T8873] bridge0: port 2(bridge_slave_1) entered disabled state [ 267.416321][ T8873] device bridge_slave_1 entered promiscuous mode [ 267.434824][ T8873] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 267.446333][ T8873] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 267.467168][ T8873] team0: Port device team_slave_0 added [ 267.474588][ T8873] team0: Port device team_slave_1 added [ 267.558031][ T8873] device hsr_slave_0 entered promiscuous mode [ 267.626629][ T8873] device hsr_slave_1 entered promiscuous mode [ 267.704590][ T8873] bridge0: port 2(bridge_slave_1) entered blocking state [ 267.711965][ T8873] bridge0: port 2(bridge_slave_1) entered forwarding state [ 267.720130][ T8873] bridge0: port 1(bridge_slave_0) entered blocking state [ 267.727243][ T8873] bridge0: port 1(bridge_slave_0) entered forwarding state [ 267.763130][ T8873] 8021q: adding VLAN 0 to HW filter on device bond0 [ 267.776607][ T3020] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 267.797546][ T3020] bridge0: port 1(bridge_slave_0) entered disabled state [ 267.807969][ T3020] bridge0: port 2(bridge_slave_1) entered disabled state [ 267.818243][ T3020] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 267.830063][ T8873] 8021q: adding VLAN 0 to HW filter on device team0 [ 267.841466][ T3517] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 267.850262][ T3517] bridge0: port 1(bridge_slave_0) entered blocking state [ 267.857558][ T3517] bridge0: port 1(bridge_slave_0) entered forwarding state [ 267.877868][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 267.887171][ T5] bridge0: port 2(bridge_slave_1) entered blocking state [ 267.894210][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state [ 267.902428][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 267.912082][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 267.921363][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 267.934078][ T8873] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 267.945289][ T8873] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network executing program executing program [ 267.957861][ T3517] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 267.967569][ T3517] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 267.976275][ T3517] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 267.992940][ T8873] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 373.035714][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 373.042570][ C1] rcu: 1-...!: (10500 ticks this GP) idle=f6e/1/0x4000000000000002 softirq=9782/9782 fqs=0 [ 373.052853][ C1] (t=10501 jiffies g=7473 q=74) [ 373.057778][ C1] rcu: rcu_preempt kthread starved for 10502 jiffies! g7473 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 373.069038][ C1] rcu: RCU grace-period kthread stack dump: [ 373.074937][ C1] rcu_preempt I29520 10 2 0x80004000 [ 373.081262][ C1] Call Trace: [ 373.084652][ C1] __schedule+0x755/0x1580 [ 373.089075][ C1] ? __sched_text_start+0x8/0x8 [ 373.093908][ C1] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 373.099701][ C1] ? schedule_timeout+0x47c/0xc50 [ 373.104710][ C1] ? lockdep_hardirqs_on+0x418/0x5d0 [ 373.110553][ C1] schedule+0xd9/0x260 [ 373.114611][ C1] schedule_timeout+0x486/0xc50 [ 373.119498][ C1] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 373.125310][ C1] ? usleep_range+0x170/0x170 [ 373.129977][ C1] ? trace_hardirqs_on+0x67/0x240 [ 373.134997][ C1] ? __kasan_check_read+0x11/0x20 [ 373.140013][ C1] ? __next_timer_interrupt+0x1a0/0x1a0 [ 373.145564][ C1] ? swake_up_one+0x60/0x60 [ 373.150317][ C1] rcu_gp_kthread+0x9b2/0x18c0 [ 373.155069][ C1] ? rcu_barrier+0x310/0x310 [ 373.159643][ C1] ? trace_hardirqs_on+0x67/0x240 [ 373.164657][ C1] ? __kasan_check_read+0x11/0x20 [ 373.169685][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 373.175927][ C1] ? __kthread_parkme+0x108/0x1c0 [ 373.180936][ C1] ? __kasan_check_read+0x11/0x20 [ 373.185949][ C1] kthread+0x361/0x430 [ 373.190093][ C1] ? rcu_barrier+0x310/0x310 [ 373.194689][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 373.200923][ C1] ret_from_fork+0x24/0x30 [ 373.205373][ C1] NMI backtrace for cpu 1 [ 373.209697][ C1] CPU: 1 PID: 3517 Comm: kworker/1:2 Not tainted 5.3.0-rc7+ #0 [ 373.217301][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 373.227563][ C1] Workqueue: ipv6_addrconf addrconf_dad_work [ 373.233548][ C1] Call Trace: [ 373.236819][ C1] [ 373.239711][ C1] dump_stack+0x172/0x1f0 [ 373.244030][ C1] nmi_cpu_backtrace.cold+0x70/0xb2 [ 373.249229][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 373.255554][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 373.261178][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 373.267243][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 373.273122][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 373.278234][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 373.283854][ C1] ? raise_softirq+0x138/0x340 [ 373.288696][ C1] update_process_times+0x32/0x80 [ 373.293710][ C1] tick_sched_handle+0xa2/0x190 [ 373.298637][ C1] tick_sched_timer+0x53/0x140 [ 373.303387][ C1] __hrtimer_run_queues+0x364/0xe40 [ 373.308572][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 373.313843][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 373.319545][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 373.325247][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 373.331304][ C1] hrtimer_interrupt+0x314/0x770 [ 373.336306][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 373.341848][ C1] apic_timer_interrupt+0xf/0x20 [ 373.346809][ C1] RIP: 0010:hhf_dequeue+0x61a/0xa20 [ 373.351997][ C1] Code: 08 4c 8b 3b 48 89 fa 48 c1 ea 03 42 80 3c 22 00 0f 85 d0 03 00 00 49 8d 7f 08 4c 8b 73 08 48 89 fa 48 c1 ea 03 42 80 3c 22 00 <0f> 85 ac 03 00 00 4c 89 f2 4d 89 77 08 48 c1 ea 03 42 80 3c 22 00 [ 373.371941][ C1] RSP: 0018:ffff8880ae908b48 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 373.380345][ C1] RAX: 1ffff11010e64187 RBX: ffff888087320c38 RCX: ffffffff85c7e0d1 [ 373.388303][ C1] RDX: 1ffff11010e6419b RSI: ffffffff85c7e0db RDI: ffff888087320cd8 [ 373.396269][ C1] RBP: ffff8880ae908b98 R08: ffff88809cb82240 R09: fffffbfff14e9755 [ 373.404319][ C1] R10: ffff88809cb82c38 R11: ffff88809cb82240 R12: dffffc0000000000 [ 373.412279][ C1] R13: ffff888087320940 R14: ffff888087320cd0 R15: ffff888087320cd0 [ 373.420259][ C1] ? apic_timer_interrupt+0xa/0x20 [ 373.425372][ C1] ? hhf_dequeue+0x5d1/0xa20 [ 373.429977][ C1] ? hhf_dequeue+0x5db/0xa20 [ 373.434986][ C1] ? hhf_dequeue+0x5db/0xa20 [ 373.439633][ C1] __qdisc_run+0x1e7/0x19d0 [ 373.444150][ C1] ? dev_queue_xmit+0x18/0x20 [ 373.448912][ C1] __dev_queue_xmit+0x16f1/0x3650 [ 373.453917][ C1] ? process_backlog+0x206/0x750 [ 373.458837][ C1] ? net_rx_action+0x4d6/0x1080 [ 373.463674][ C1] ? __do_softirq+0x262/0x98c [ 373.468351][ C1] ? do_softirq_own_stack+0x2a/0x40 [ 373.473668][ C1] ? do_softirq.part.0+0x11a/0x170 [ 373.478776][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 373.484112][ C1] ? __skb_ext_put+0xd9/0x210 [ 373.488781][ C1] dev_queue_xmit+0x18/0x20 [ 373.493269][ C1] ? dev_queue_xmit+0x18/0x20 [ 373.497988][ C1] br_dev_queue_push_xmit+0x3f3/0x5c0 [ 373.503348][ C1] ? __skb_ext_del+0xb0/0x2c0 [ 373.508012][ C1] ? lock_downgrade+0x920/0x920 [ 373.512907][ C1] br_nf_dev_queue_xmit+0x34e/0x1470 [ 373.518263][ C1] br_nf_post_routing+0x1502/0x1d30 [ 373.523450][ C1] ? br_nf_dev_queue_xmit+0x1470/0x1470 [ 373.528996][ C1] ? mark_held_locks+0xf0/0xf0 [ 373.533747][ C1] ? nf_bridge_update_protocol+0x1d0/0x1d0 [ 373.539542][ C1] ? __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 373.547038][ C1] nf_hook_slow+0xbc/0x1e0 [ 373.551448][ C1] br_forward_finish+0x215/0x400 [ 373.556416][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 373.562936][ C1] ? br_fdb_add.cold+0x8c/0x8c [ 373.567698][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 373.573408][ C1] ? nf_hook_slow+0xf0/0x1e0 [ 373.577986][ C1] br_nf_hook_thresh+0x2e9/0x370 [ 373.582912][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 373.588458][ C1] ? setup_pre_routing+0x4b0/0x4b0 [ 373.593558][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 373.599088][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 373.605665][ C1] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 373.611550][ C1] br_nf_forward_finish+0x66c/0xa90 [ 373.616732][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 373.622267][ C1] br_nf_forward_ip+0xc74/0x21e0 [ 373.627192][ C1] ? br_nf_forward_arp+0x1670/0x1670 [ 373.632547][ C1] ? mark_held_locks+0xf0/0xf0 [ 373.637306][ C1] ? br_nf_hook_thresh+0x370/0x370 [ 373.642570][ C1] ? __vlan_flush+0x120/0x120 [ 373.647277][ C1] nf_hook_slow+0xbc/0x1e0 [ 373.651727][ C1] __br_forward+0x393/0xb00 [ 373.656224][ C1] ? br_forward_finish+0x400/0x400 [ 373.664644][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 373.670204][ C1] deliver_clone+0x61/0xc0 [ 373.674620][ C1] br_flood+0x325/0x3d0 [ 373.678961][ C1] br_handle_frame_finish+0xb46/0x1670 [ 373.684411][ C1] ? br_handle_local_finish+0x20/0x20 [ 373.689873][ C1] ? audit_alloc_mark+0x3d0/0x500 [ 373.694891][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 373.700602][ C1] ? nf_hook_slow+0xf0/0x1e0 [ 373.705224][ C1] br_nf_hook_thresh+0x2e9/0x370 [ 373.710413][ C1] ? br_handle_local_finish+0x20/0x20 [ 373.715791][ C1] ? setup_pre_routing+0x4b0/0x4b0 [ 373.720897][ C1] ? find_held_lock+0x35/0x130 [ 373.725925][ C1] ? br_handle_local_finish+0x20/0x20 [ 373.731360][ C1] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 373.737348][ C1] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 373.743251][ C1] br_nf_pre_routing_finish_ipv6+0x6fb/0xd80 [ 373.749219][ C1] ? br_handle_local_finish+0x20/0x20 [ 373.754577][ C1] ? __kasan_check_read+0x11/0x20 [ 373.759678][ C1] br_nf_pre_routing_ipv6+0x456/0x832 [ 373.765043][ C1] ? br_validate_ipv6+0xb80/0xb80 [ 373.770253][ C1] ? br_nf_pre_routing_finish.cold+0x124/0x124 [ 373.776389][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 373.782638][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 373.788894][ C1] ? skb_pull_rcsum+0x155/0x300 [ 373.794357][ C1] br_nf_pre_routing+0x1743/0x2355 [ 373.799465][ C1] ? br_nf_pre_routing_finish+0x1730/0x1730 [ 373.805354][ C1] ? br_nf_pre_routing_finish+0x1730/0x1730 [ 373.811241][ C1] br_handle_frame+0x806/0x133e [ 373.816095][ C1] ? br_handle_frame_finish+0x1670/0x1670 [ 373.821816][ C1] ? br_handle_local_finish+0x20/0x20 [ 373.827211][ C1] ? br_handle_frame_finish+0x1670/0x1670 [ 373.833536][ C1] __netif_receive_skb_core+0xfc1/0x3060 [ 373.839160][ C1] ? __kasan_check_read+0x11/0x20 [ 373.844184][ C1] ? do_xdp_generic+0x50/0x50 [ 373.849031][ C1] ? __kasan_check_read+0x11/0x20 [ 373.854043][ C1] ? __lock_acquire+0x8a2/0x4c30 [ 373.858987][ C1] ? __kasan_check_read+0x11/0x20 [ 373.864003][ C1] ? mark_lock+0xc0/0x11e0 [ 373.868402][ C1] ? __lock_acquire+0x1702/0x4c30 [ 373.873425][ C1] __netif_receive_skb_one_core+0xa8/0x1a0 [ 373.879252][ C1] ? __netif_receive_skb_one_core+0xa8/0x1a0 [ 373.885658][ C1] ? __netif_receive_skb_core+0x3060/0x3060 [ 373.892321][ C1] ? lock_acquire+0x190/0x410 [ 373.896994][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 373.903223][ C1] __netif_receive_skb+0x2c/0x1d0 [ 373.908338][ C1] process_backlog+0x206/0x750 [ 373.913087][ C1] ? net_rx_action+0x249/0x1080 [ 373.917929][ C1] ? lockdep_hardirqs_on+0x19e/0x5d0 [ 373.923206][ C1] net_rx_action+0x4d6/0x1080 [ 373.927873][ C1] ? napi_busy_loop+0x970/0x970 [ 373.932720][ C1] __do_softirq+0x262/0x98c [ 373.937575][ C1] ? ip6_finish_output2+0x106d/0x2520 [ 373.942933][ C1] do_softirq_own_stack+0x2a/0x40 [ 373.948280][ C1] [ 373.951218][ C1] do_softirq.part.0+0x11a/0x170 [ 373.956140][ C1] __local_bh_enable_ip+0x211/0x270 [ 373.962191][ C1] ip6_finish_output2+0x10a0/0x2520 [ 373.967526][ C1] ? ip6_mtu+0x2e6/0x460 [ 373.971759][ C1] ? ip6_forward_finish+0x530/0x530 [ 373.976948][ C1] ? lock_downgrade+0x920/0x920 [ 373.981793][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 373.988630][ C1] ? __kasan_check_read+0x11/0x20 [ 373.994111][ C1] __ip6_finish_output+0x444/0xa50 [ 373.999296][ C1] ? __ip6_finish_output+0x444/0xa50 [ 374.004567][ C1] ip6_finish_output+0x38/0x1f0 [ 374.009752][ C1] ip6_output+0x235/0x7c0 [ 374.014089][ C1] ? ip6_finish_output+0x1f0/0x1f0 [ 374.019202][ C1] ? __ip6_finish_output+0xa50/0xa50 [ 374.024554][ C1] ndisc_send_skb+0xf29/0x1450 [ 374.029323][ C1] ? nf_hook.constprop.0+0x560/0x560 [ 374.034602][ C1] ? skb_set_owner_w+0x21b/0x320 [ 374.039532][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 374.045304][ C1] ndisc_send_ns+0x3a9/0x850 [ 374.050159][ C1] ? mark_held_locks+0xa4/0xf0 [ 374.054926][ C1] ? ndisc_netdev_event+0x4e0/0x4e0 [ 374.060108][ C1] ? lockdep_hardirqs_on+0x418/0x5d0 [ 374.065376][ C1] ? addrconf_dad_work+0xac4/0x1150 [ 374.070992][ C1] ? trace_hardirqs_on+0x67/0x240 [ 374.076112][ C1] ? addrconf_dad_work+0xac4/0x1150 [ 374.081332][ C1] addrconf_dad_work+0xb88/0x1150 [ 374.086359][ C1] ? addrconf_dad_completed+0xbb0/0xbb0 [ 374.092032][ C1] process_one_work+0x9af/0x1740 [ 374.098899][ C1] ? pwq_dec_nr_in_flight+0x320/0x320 [ 374.104258][ C1] ? lock_acquire+0x190/0x410 [ 374.108930][ C1] worker_thread+0x98/0xe40 [ 374.113428][ C1] ? trace_hardirqs_on+0x67/0x240 [ 374.118466][ C1] kthread+0x361/0x430 [ 374.122542][ C1] ? process_one_work+0x1740/0x1740 [ 374.127722][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 374.134035][ C1] ret_from_fork+0x24/0x30