[....] 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.
[ 64.942899][ T26] kauditd_printk_skb: 7 callbacks suppressed
[ 64.942909][ T26] audit: type=1800 audit(1567875377.538:29): pid=9766 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
[ 64.980853][ T26] audit: type=1800 audit(1567875377.538:30): pid=9766 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 '10.128.10.40' (ECDSA) to the list of known hosts.
syzkaller login: [ 135.199916][ T9919] IPVS: ftp: loaded support on port[0] = 21
[ 135.252086][ T9919] chnl_net:caif_netlink_parms(): no params data found
[ 135.276402][ T9919] bridge0: port 1(bridge_slave_0) entered blocking state
[ 135.283992][ T9919] bridge0: port 1(bridge_slave_0) entered disabled state
[ 135.291840][ T9919] device bridge_slave_0 entered promiscuous mode
[ 135.299361][ T9919] bridge0: port 2(bridge_slave_1) entered blocking state
[ 135.306460][ T9919] bridge0: port 2(bridge_slave_1) entered disabled state
[ 135.314500][ T9919] device bridge_slave_1 entered promiscuous mode
[ 135.329090][ T9919] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[ 135.339903][ T9919] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[ 135.356968][ T9919] team0: Port device team_slave_0 added
[ 135.363767][ T9919] team0: Port device team_slave_1 added
[ 135.438611][ T9919] device hsr_slave_0 entered promiscuous mode
[ 135.507018][ T9919] device hsr_slave_1 entered promiscuous mode
[ 135.592046][ T9919] bridge0: port 2(bridge_slave_1) entered blocking state
[ 135.599564][ T9919] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 135.607022][ T9919] bridge0: port 1(bridge_slave_0) entered blocking state
[ 135.614174][ T9919] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 135.639782][ T9919] 8021q: adding VLAN 0 to HW filter on device bond0
[ 135.650533][ T2827] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[ 135.669406][ T2827] bridge0: port 1(bridge_slave_0) entered disabled state
[ 135.677358][ T2827] bridge0: port 2(bridge_slave_1) entered disabled state
[ 135.685018][ T2827] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready
[ 135.695690][ T9919] 8021q: adding VLAN 0 to HW filter on device team0
[ 135.705357][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready
[ 135.714103][ T12] bridge0: port 1(bridge_slave_0) entered blocking state
[ 135.721445][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 135.738062][ T2827] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready
[ 135.747472][ T2827] bridge0: port 2(bridge_slave_1) entered blocking state
[ 135.754922][ T2827] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 135.763114][ T2827] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready
[ 135.772004][ T2827] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready
[ 135.780672][ T2827] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
executing program
[ 135.790436][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready
[ 135.802508][ T9919] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network
[ 135.813501][ T9919] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
[ 135.822583][ T9921] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
[ 135.839039][ T9919] 8021q: adding VLAN 0 to HW filter on device batadv0
[ 240.886659][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU
[ 240.893542][ C1] rcu: 1-...!: (10500 ticks this GP) idle=01a/0/0x3 softirq=9312/9312 fqs=0
[ 240.902374][ C1] (t=10500 jiffies g=9457 q=43)
[ 240.907295][ C1] rcu: rcu_preempt kthread starved for 10500 jiffies! g9457 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
[ 240.918566][ C1] rcu: RCU grace-period kthread stack dump:
[ 240.924437][ C1] rcu_preempt I29392 10 2 0x80004000
[ 240.930757][ C1] Call Trace:
[ 240.934035][ C1] __schedule+0x755/0x1580
[ 240.938433][ C1] ? __sched_text_start+0x8/0x8
[ 240.943289][ C1] schedule+0xd9/0x260
[ 240.947511][ C1] schedule_timeout+0x486/0xc50
[ 240.952348][ C1] ? rwlock_bug.part.0+0x90/0x90
[ 240.957264][ C1] ? usleep_range+0x170/0x170
[ 240.961923][ C1] ? trace_hardirqs_on+0x67/0x240
[ 240.967277][ C1] ? __kasan_check_read+0x11/0x20
[ 240.972373][ C1] ? __next_timer_interrupt+0x1a0/0x1a0
[ 240.977986][ C1] ? swake_up_one+0x60/0x60
[ 240.982595][ C1] ? trace_hardirqs_on+0x67/0x240
[ 240.987602][ C1] rcu_gp_kthread+0x9b2/0x18c0
[ 240.992624][ C1] ? rcu_barrier+0x310/0x310
[ 240.997399][ C1] ? trace_hardirqs_on+0x67/0x240
[ 241.002403][ C1] ? __kasan_check_read+0x11/0x20
[ 241.007412][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[ 241.013647][ C1] ? __kthread_parkme+0x108/0x1c0
[ 241.018652][ C1] ? __kasan_check_read+0x11/0x20
[ 241.023660][ C1] kthread+0x361/0x430
[ 241.027713][ C1] ? rcu_barrier+0x310/0x310
[ 241.032371][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20
[ 241.038685][ C1] ret_from_fork+0x24/0x30
[ 241.043205][ C1] NMI backtrace for cpu 1
[ 241.047557][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0-rc7+ #0
[ 241.054729][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 241.064775][ C1] Call Trace:
[ 241.068041][ C1]
[ 241.070883][ C1] dump_stack+0x172/0x1f0
[ 241.075196][ C1] nmi_cpu_backtrace.cold+0x70/0xb2
[ 241.080396][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 241.086619][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45
[ 241.092233][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b
[ 241.098212][ C1] arch_trigger_cpumask_backtrace+0x14/0x20
[ 241.104085][ C1] rcu_dump_cpu_stacks+0x183/0x1cf
[ 241.109217][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13
[ 241.114835][ C1] ? raise_softirq+0x138/0x340
[ 241.119605][ C1] update_process_times+0x32/0x80
[ 241.124627][ C1] tick_sched_handle+0xa2/0x190
[ 241.129464][ C1] tick_sched_timer+0x53/0x140
[ 241.134210][ C1] __hrtimer_run_queues+0x364/0xe40
[ 241.139407][ C1] ? tick_sched_do_timer+0x1b0/0x1b0
[ 241.144761][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0
[ 241.150295][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20
[ 241.156177][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440
[ 241.162234][ C1] hrtimer_interrupt+0x314/0x770
[ 241.167179][ C1] smp_apic_timer_interrupt+0x160/0x610
[ 241.172729][ C1] apic_timer_interrupt+0xf/0x20
[ 241.178398][ C1] RIP: 0010:hhf_dequeue+0x68b/0xa20
[ 241.183584][ C1] Code: 48 8b 55 c8 4c 89 fe e8 b3 d9 77 fd 31 ff 89 c6 88 45 b0 e8 37 15 ac fb 0f b6 75 b0 40 84 f6 0f 84 c6 f9 ff ff e8 e5 13 ac fb <4c> 89 f0 48 c1 e8 03 42 80 3c 20 00 0f 85 08 03 00 00 48 89 d8 49
[ 241.203167][ C1] RSP: 0018:ffff8880ae909038 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13
[ 241.211557][ C1] RAX: ffff8880a98c6340 RBX: ffff888091b154f8 RCX: ffffffff85c660f9
[ 241.219510][ C1] RDX: 0000000000000100 RSI: ffffffff85c6610b RDI: 0000000000000001
[ 241.227574][ C1] RBP: ffff8880ae909088 R08: ffff8880a98c6340 R09: 0000000000000000
[ 241.235535][ C1] R10: fffffbfff134afaf R11: ffff8880a98c6340 R12: dffffc0000000000
[ 241.243487][ C1] R13: ffff888091b15200 R14: ffff888091b15598 R15: ffff888091b15590
[ 241.251540][ C1] ? apic_timer_interrupt+0xa/0x20
[ 241.256651][ C1] ? hhf_dequeue+0x679/0xa20
[ 241.261322][ C1] ? hhf_dequeue+0x68b/0xa20
[ 241.265893][ C1] ? hhf_dequeue+0x68b/0xa20
[ 241.270638][ C1] __qdisc_run+0x1e7/0x19d0
[ 241.275125][ C1] ? dev_queue_xmit+0x18/0x20
[ 241.280482][ C1] __dev_queue_xmit+0x16f1/0x3650
[ 241.285488][ C1] ? __local_bh_enable_ip+0x15a/0x270
[ 241.291132][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0
[ 241.296408][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[ 241.302890][ C1] ? br_nf_post_routing+0xd73/0x1d30
[ 241.308242][ C1] ? br_forward_finish+0x235/0x400
[ 241.314593][ C1] ? __kasan_check_read+0x11/0x20
[ 241.319693][ C1] ? __dev_queue_xmit+0x2b15/0x3650
[ 241.324885][ C1] dev_queue_xmit+0x18/0x20
[ 241.329371][ C1] ? dev_queue_xmit+0x18/0x20
[ 241.334025][ C1] br_dev_queue_push_xmit+0x3f3/0x5c0
[ 241.339387][ C1] ? nf_hook_slow+0xf0/0x1e0
[ 241.343958][ C1] br_forward_finish+0xfa/0x400
[ 241.348798][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0
[ 241.354322][ C1] ? br_fdb_add.cold+0x8c/0x8c
[ 241.359068][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20
[ 241.364764][ C1] ? nf_hook_slow+0xf0/0x1e0
[ 241.369420][ C1] __br_forward+0x641/0xb00
[ 241.373925][ C1] ? br_forward_finish+0x400/0x400
[ 241.379025][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0
[ 241.384640][ C1] deliver_clone+0x61/0xc0
[ 241.389044][ C1] maybe_deliver+0x2c7/0x390
[ 241.393613][ C1] br_flood+0x13a/0x3d0
[ 241.397761][ C1] br_dev_xmit+0x98c/0x15a0
[ 241.402246][ C1] ? br_poll_controller+0x10/0x10
[ 241.407256][ C1] ? netif_skb_features+0x6c2/0xb90
[ 241.412442][ C1] ? netdev_set_sb_channel+0xe0/0xe0
[ 241.417708][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[ 241.423925][ C1] ? validate_xmit_xfrm+0x43c/0xf10
[ 241.429104][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 241.435323][ C1] dev_hard_start_xmit+0x1a3/0x9c0
[ 241.440415][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 241.446727][ C1] __dev_queue_xmit+0x2b15/0x3650
[ 241.451910][ C1] ? __nf_conntrack_find_get+0xa97/0x13a0
[ 241.457613][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0
[ 241.462879][ C1] ? __ip_finish_output+0x5fc/0xb90
[ 241.468061][ C1] ? __kasan_check_read+0x11/0x20
[ 241.473078][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[ 241.479299][ C1] ? __nf_ct_refresh_acct+0x93/0x2d0
[ 241.484567][ C1] ? lock_downgrade+0x920/0x920
[ 241.489396][ C1] ? lock_acquire+0x190/0x410
[ 241.494055][ C1] ? __ip_finish_output+0x5fc/0xb90
[ 241.499252][ C1] dev_queue_xmit+0x18/0x20
[ 241.503909][ C1] ? dev_queue_xmit+0x18/0x20
[ 241.508567][ C1] ip_finish_output2+0x1726/0x2570
[ 241.513663][ C1] ? nf_ct_deliver_cached_events+0x23d/0x6e0
[ 241.519629][ C1] ? ip_frag_next+0x910/0x910
[ 241.524287][ C1] ? __kasan_check_read+0x11/0x20
[ 241.529292][ C1] __ip_finish_output+0x5fc/0xb90
[ 241.534311][ C1] ? __ip_finish_output+0x5fc/0xb90
[ 241.539491][ C1] ? audit_alloc_mark+0x430/0x500
[ 241.544615][ C1] ip_finish_output+0x38/0x1f0
[ 241.549367][ C1] ip_output+0x21f/0x640
[ 241.553601][ C1] ? ip_mc_output+0xf40/0xf40
[ 241.558267][ C1] ? __ip_finish_output+0xb90/0xb90
[ 241.563449][ C1] ? __kasan_check_read+0x11/0x20
[ 241.568629][ C1] ip_local_out+0xbb/0x190
[ 241.573045][ C1] igmpv3_sendpack+0x1b5/0x2c0
[ 241.577808][ C1] igmp_ifc_timer_expire+0x687/0xa00
[ 241.583088][ C1] ? call_timer_fn+0xe0/0x780
[ 241.587744][ C1] call_timer_fn+0x1ac/0x780
[ 241.592315][ C1] ? __ip_mc_dec_group+0x520/0x520
[ 241.597410][ C1] ? msleep_interruptible+0x150/0x150
[ 241.602850][ C1] ? trace_hardirqs_on+0x67/0x240
[ 241.607860][ C1] ? __kasan_check_read+0x11/0x20
[ 241.612863][ C1] ? __ip_mc_dec_group+0x520/0x520
[ 241.617956][ C1] ? __ip_mc_dec_group+0x520/0x520
[ 241.623229][ C1] run_timer_softirq+0x697/0x17a0
[ 241.628320][ C1] ? add_timer+0x930/0x930
[ 241.632730][ C1] ? kvm_clock_read+0x18/0x30
[ 241.637403][ C1] ? sched_clock+0x2e/0x50
[ 241.641806][ C1] ? sched_clock_cpu+0x1b/0x1b0
[ 241.646636][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 241.652946][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 241.659275][ C1] __do_softirq+0x262/0x98c
[ 241.663756][ C1] ? sched_clock_cpu+0x1b/0x1b0
[ 241.668593][ C1] irq_exit+0x19b/0x1e0
[ 241.672744][ C1] smp_apic_timer_interrupt+0x1a3/0x610
[ 241.678270][ C1] apic_timer_interrupt+0xf/0x20
[ 241.683182][ C1]
[ 241.686104][ C1] RIP: 0010:native_safe_halt+0xe/0x10
[ 241.691458][ C1] Code: 38 73 6e fa eb 8a 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 24 1b 4a 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 14 1b 4a 00 fb f4 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 ee 32 22 fa e8 39
[ 241.711058][ C1] RSP: 0018:ffff8880a98dfd68 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 241.719549][ C1] RAX: 1ffffffff11a5e8d RBX: ffff8880a98c6340 RCX: 1ffffffff134b5ee
[ 241.727677][ C1] RDX: dffffc0000000000 RSI: ffffffff8177f14e RDI: ffffffff873e050c
[ 241.736587][ C1] RBP: ffff8880a98dfd98 R08: ffff8880a98c6340 R09: ffffed1015318c69
[ 241.744546][ C1] R10: ffffed1015318c68 R11: ffff8880a98c6347 R12: dffffc0000000000
[ 241.752497][ C1] R13: ffffffff89a57d78 R14: 0000000000000000 R15: 0000000000000001
[ 241.760555][ C1] ? trace_hardirqs_on+0x5e/0x240
[ 241.765936][ C1] ? default_idle+0x1c/0x360
[ 241.770610][ C1] ? default_idle+0x4e/0x360
[ 241.775700][ C1] arch_cpu_idle+0xa/0x10
[ 241.780528][ C1] default_idle_call+0x84/0xb0
[ 241.785271][ C1] do_idle+0x413/0x760
[ 241.789322][ C1] ? arch_cpu_idle_exit+0x80/0x80
[ 241.794326][ C1] ? _raw_spin_unlock_irqrestore+0xa4/0xe0
[ 241.800136][ C1] ? complete+0x61/0x80
[ 241.804287][ C1] cpu_startup_entry+0x1b/0x20
[ 241.809035][ C1] start_secondary+0x315/0x430
[ 241.813778][ C1] ? set_cpu_sibling_map+0x2180/0x2180
[ 241.819335][ C1] secondary_startup_64+0xa4/0xb0