[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 65.756667][ T26] kauditd_printk_skb: 7 callbacks suppressed
[ 65.756679][ T26] audit: type=1800 audit(1568333568.756:29): pid=9681 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
[ 65.783330][ T26] audit: type=1800 audit(1568333568.756:30): pid=9681 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 '10.128.10.9' (ECDSA) to the list of known hosts.
syzkaller login: [ 148.791084][ T9837] IPVS: ftp: loaded support on port[0] = 21
[ 148.834980][ T9837] chnl_net:caif_netlink_parms(): no params data found
[ 148.859297][ T9837] bridge0: port 1(bridge_slave_0) entered blocking state
[ 148.866617][ T9837] bridge0: port 1(bridge_slave_0) entered disabled state
[ 148.874279][ T9837] device bridge_slave_0 entered promiscuous mode
[ 148.881665][ T9837] bridge0: port 2(bridge_slave_1) entered blocking state
[ 148.888800][ T9837] bridge0: port 2(bridge_slave_1) entered disabled state
[ 148.896551][ T9837] device bridge_slave_1 entered promiscuous mode
[ 148.910744][ T9837] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[ 148.921865][ T9837] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[ 148.939655][ T9837] team0: Port device team_slave_0 added
[ 148.946970][ T9837] team0: Port device team_slave_1 added
[ 149.028166][ T9837] device hsr_slave_0 entered promiscuous mode
[ 149.076906][ T9837] device hsr_slave_1 entered promiscuous mode
[ 149.151734][ T9837] bridge0: port 2(bridge_slave_1) entered blocking state
[ 149.159171][ T9837] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 149.166599][ T9837] bridge0: port 1(bridge_slave_0) entered blocking state
[ 149.173947][ T9837] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 149.199215][ T9837] 8021q: adding VLAN 0 to HW filter on device bond0
[ 149.210447][ T3516] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[ 149.219387][ T3516] bridge0: port 1(bridge_slave_0) entered disabled state
[ 149.228517][ T3516] bridge0: port 2(bridge_slave_1) entered disabled state
[ 149.236225][ T3516] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready
[ 149.247548][ T9837] 8021q: adding VLAN 0 to HW filter on device team0
[ 149.257629][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready
[ 149.266343][ T12] bridge0: port 1(bridge_slave_0) entered blocking state
[ 149.273482][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 149.282740][ T9839] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready
[ 149.291427][ T9839] bridge0: port 2(bridge_slave_1) entered blocking state
[ 149.298860][ T9839] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 149.312940][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready
[ 149.321942][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
[ 149.335746][ T9837] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network
[ 149.347156][ T9837] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network
[ 149.359772][ T9839] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready
[ 149.368255][ T9839] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready
[ 149.377151][ T9839] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
[ 149.385648][ T9839] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
executing program
[ 149.400397][ T9837] 8021q: adding VLAN 0 to HW filter on device batadv0
[ 254.426411][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU
[ 254.433076][ C1] rcu: 1-...!: (10499 ticks this GP) idle=ee2/1/0x4000000000000002 softirq=9466/9466 fqs=37
[ 254.443288][ C1] (t=10500 jiffies g=9333 q=82)
[ 254.448207][ C1] rcu: rcu_preempt kthread starved for 10425 jiffies! g9333 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
[ 254.459455][ C1] rcu: RCU grace-period kthread stack dump:
[ 254.465341][ C1] rcu_preempt I29520 10 2 0x80004000
[ 254.471654][ C1] Call Trace:
[ 254.474936][ C1] __schedule+0x755/0x1580
[ 254.479345][ C1] ? __sched_text_start+0x8/0x8
[ 254.484197][ C1] schedule+0xd9/0x260
[ 254.488247][ C1] schedule_timeout+0x486/0xc50
[ 254.493080][ C1] ? rwlock_bug.part.0+0x90/0x90
[ 254.497996][ C1] ? usleep_range+0x170/0x170
[ 254.502663][ C1] ? trace_hardirqs_on+0x67/0x240
[ 254.507679][ C1] ? __kasan_check_read+0x11/0x20
[ 254.512686][ C1] ? __next_timer_interrupt+0x1a0/0x1a0
[ 254.518209][ C1] ? swake_up_one+0x60/0x60
[ 254.522695][ C1] rcu_gp_kthread+0x9b2/0x18c0
[ 254.527453][ C1] ? rcu_barrier+0x310/0x310
[ 254.532019][ C1] ? trace_hardirqs_on+0x67/0x240
[ 254.537022][ C1] ? __kasan_check_read+0x11/0x20
[ 254.542033][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[ 254.548267][ C1] ? __kthread_parkme+0x108/0x1c0
[ 254.553269][ C1] ? __kasan_check_read+0x11/0x20
[ 254.558290][ C1] kthread+0x361/0x430
[ 254.562338][ C1] ? rcu_barrier+0x310/0x310
[ 254.566906][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20
[ 254.573128][ C1] ret_from_fork+0x24/0x30
[ 254.577553][ C1] NMI backtrace for cpu 1
[ 254.581863][ C1] CPU: 1 PID: 9839 Comm: kworker/1:3 Not tainted 5.3.0-rc8+ #0
[ 254.589378][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 254.599439][ C1] Workqueue: ipv6_addrconf addrconf_dad_work
[ 254.605412][ C1] Call Trace:
[ 254.608676][ C1]
[ 254.611508][ C1] dump_stack+0x172/0x1f0
[ 254.615818][ C1] nmi_cpu_backtrace.cold+0x70/0xb2
[ 254.620995][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 254.627215][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45
[ 254.632830][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b
[ 254.638792][ C1] arch_trigger_cpumask_backtrace+0x14/0x20
[ 254.644667][ C1] rcu_dump_cpu_stacks+0x183/0x1cf
[ 254.649761][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13
[ 254.655285][ C1] ? raise_softirq+0x138/0x340
[ 254.660030][ C1] update_process_times+0x32/0x80
[ 254.665055][ C1] tick_sched_handle+0xa2/0x190
[ 254.669888][ C1] tick_sched_timer+0x53/0x140
[ 254.674664][ C1] __hrtimer_run_queues+0x364/0xe40
[ 254.679842][ C1] ? tick_sched_do_timer+0x1b0/0x1b0
[ 254.685108][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0
[ 254.690636][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20
[ 254.696336][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440
[ 254.702384][ C1] hrtimer_interrupt+0x314/0x770
[ 254.707308][ C1] smp_apic_timer_interrupt+0x160/0x610
[ 254.712835][ C1] apic_timer_interrupt+0xf/0x20
[ 254.717746][ C1]
[ 254.720669][ C1] RIP: 0010:hhf_dequeue+0x532/0xa20
[ 254.725847][ C1] Code: 45 b8 4c 8b 75 c8 42 80 3c 20 00 0f 85 3a 04 00 00 49 8b 85 90 03 00 00 48 39 45 c8 0f 85 4b fb ff ff 45 31 ff e9 b0 02 00 00 39 15 ac fb 48 8d 43 f0 41 be 01 00 00 00 49 8d 95 c0 02 00 00
[ 254.745445][ C1] RSP: 0018:ffff88809780f3f8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
[ 254.753840][ C1] RAX: 0000000000000000 RBX: ffff8880a20b9078 RCX: ffffffff85c65b39
[ 254.761788][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
[ 254.769751][ C1] RBP: ffff88809780f448 R08: ffff88809261c540 R09: 0000000000000000
[ 254.777704][ C1] R10: fffffbfff134afaf R11: ffff88809261c540 R12: dffffc0000000000
[ 254.785655][ C1] R13: ffff8880a20b8d80 R14: ffff8880a20b9110 R15: 0000000000000000
[ 254.793627][ C1] ? hhf_dequeue+0xb9/0xa20
[ 254.798122][ C1] ? hhf_dequeue+0xb9/0xa20
[ 254.802607][ C1] __qdisc_run+0x1e7/0x19d0
[ 254.807093][ C1] ? dev_queue_xmit+0x18/0x20
[ 254.811786][ C1] __dev_queue_xmit+0x16f1/0x3650
[ 254.816793][ C1] ? ndisc_constructor+0x1a5/0xb40
[ 254.821899][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0
[ 254.827175][ C1] ? ip6_finish_output2+0x1034/0x2520
[ 254.832524][ C1] ? __kasan_check_read+0x11/0x20
[ 254.837544][ C1] ? lock_downgrade+0x920/0x920
[ 254.842372][ C1] dev_queue_xmit+0x18/0x20
[ 254.846852][ C1] ? dev_queue_xmit+0x18/0x20
[ 254.851510][ C1] neigh_resolve_output+0x5a5/0x970
[ 254.856698][ C1] ip6_finish_output2+0x1034/0x2520
[ 254.861883][ C1] ? ip6_mtu+0x2e6/0x460
[ 254.866105][ C1] ? ip6_forward_finish+0x530/0x530
[ 254.871281][ C1] ? lock_downgrade+0x920/0x920
[ 254.876109][ C1] ? ip6_mtu+0x16f/0x460
[ 254.880332][ C1] __ip6_finish_output+0x444/0xa50
[ 254.885417][ C1] ? __ip6_finish_output+0x444/0xa50
[ 254.890677][ C1] ip6_finish_output+0x38/0x1f0
[ 254.895516][ C1] ip6_output+0x235/0x7c0
[ 254.900079][ C1] ? ip6_finish_output+0x1f0/0x1f0
[ 254.905178][ C1] ? __ip6_finish_output+0xa50/0xa50
[ 254.910440][ C1] ? ndisc_send_skb+0x803/0x1450
[ 254.915375][ C1] ndisc_send_skb+0xf29/0x1450
[ 254.920120][ C1] ? nf_hook.constprop.0+0x560/0x560
[ 254.925389][ C1] ? skb_set_owner_w+0x21b/0x320
[ 254.930312][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20
[ 254.936009][ C1] ndisc_send_ns+0x3a9/0x850
[ 254.940586][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 254.946808][ C1] ? ndisc_netdev_event+0x4e0/0x4e0
[ 254.951985][ C1] ? addrconf_dad_work+0xac4/0x1150
[ 254.957158][ C1] ? trace_hardirqs_on+0x67/0x240
[ 254.962162][ C1] ? addrconf_dad_work+0xac4/0x1150
[ 254.967340][ C1] addrconf_dad_work+0xb88/0x1150
[ 254.972354][ C1] ? addrconf_dad_completed+0xbb0/0xbb0
[ 254.977899][ C1] ? lock_acquire+0x190/0x410
[ 254.982553][ C1] ? trace_hardirqs_on+0x67/0x240
[ 254.987566][ C1] process_one_work+0x9af/0x1740
[ 254.992485][ C1] ? pwq_dec_nr_in_flight+0x320/0x320
[ 254.997835][ C1] ? lock_acquire+0x190/0x410
[ 255.002492][ C1] worker_thread+0x98/0xe40
[ 255.006969][ C1] ? trace_hardirqs_on+0x67/0x240
[ 255.011976][ C1] kthread+0x361/0x430
[ 255.016024][ C1] ? process_one_work+0x1740/0x1740
[ 255.021198][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20
[ 255.027414][ C1] ret_from_fork+0x24/0x30