[....] 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.
[ 67.686452][ T26] kauditd_printk_skb: 7 callbacks suppressed
[ 67.686462][ T26] audit: type=1800 audit(1568488829.423:29): pid=9728 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
[ 67.713298][ T26] audit: type=1800 audit(1568488829.423:30): pid=9728 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 '10.128.0.90' (ECDSA) to the list of known hosts.
syzkaller login: [ 241.099792][ T9884] IPVS: ftp: loaded support on port[0] = 21
[ 241.143447][ T9884] chnl_net:caif_netlink_parms(): no params data found
[ 241.165323][ T9884] bridge0: port 1(bridge_slave_0) entered blocking state
[ 241.172656][ T9884] bridge0: port 1(bridge_slave_0) entered disabled state
[ 241.180193][ T9884] device bridge_slave_0 entered promiscuous mode
[ 241.187373][ T9884] bridge0: port 2(bridge_slave_1) entered blocking state
[ 241.194512][ T9884] bridge0: port 2(bridge_slave_1) entered disabled state
[ 241.202042][ T9884] device bridge_slave_1 entered promiscuous mode
[ 241.215887][ T9884] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[ 241.226427][ T9884] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[ 241.242520][ T9884] team0: Port device team_slave_0 added
[ 241.248934][ T9884] team0: Port device team_slave_1 added
[ 241.321134][ T9884] device hsr_slave_0 entered promiscuous mode
[ 241.389630][ T9884] device hsr_slave_1 entered promiscuous mode
[ 241.474377][ T9884] bridge0: port 2(bridge_slave_1) entered blocking state
[ 241.481497][ T9884] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 241.488828][ T9884] bridge0: port 1(bridge_slave_0) entered blocking state
[ 241.495988][ T9884] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 241.521209][ T9884] 8021q: adding VLAN 0 to HW filter on device bond0
[ 241.532283][ T3572] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[ 241.550951][ T3572] bridge0: port 1(bridge_slave_0) entered disabled state
[ 241.558682][ T3572] bridge0: port 2(bridge_slave_1) entered disabled state
[ 241.566621][ T3572] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready
[ 241.577106][ T9884] 8021q: adding VLAN 0 to HW filter on device team0
[ 241.586766][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready
[ 241.595861][ T12] bridge0: port 1(bridge_slave_0) entered blocking state
[ 241.602963][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 241.620128][ T3572] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready
[ 241.628457][ T3572] bridge0: port 2(bridge_slave_1) entered blocking state
[ 241.635560][ T3572] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 241.643774][ T3572] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready
[ 241.652295][ T3572] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready
[ 241.661948][ T3572] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready
[ 241.670505][ T3572] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
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[ 241.680163][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
[ 241.691280][ T9884] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
[ 241.705492][ T9884] 8021q: adding VLAN 0 to HW filter on device batadv0
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[ 346.939283][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU
[ 346.945944][ C1] rcu: 1-...!: (1 GPs behind) idle=632/0/0x3 softirq=9628/9631 fqs=22
[ 346.954255][ C1] (t=10501 jiffies g=9757 q=195)
[ 346.959363][ C1] rcu: rcu_preempt kthread starved for 10458 jiffies! g9757 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
[ 346.970885][ C1] rcu: RCU grace-period kthread stack dump:
[ 346.976753][ C1] rcu_preempt I29320 10 2 0x80004000
[ 346.983066][ C1] Call Trace:
[ 346.986436][ C1] __schedule+0x755/0x1580
[ 346.990839][ C1] ? __sched_text_start+0x8/0x8
[ 346.995673][ C1] schedule+0xd9/0x260
[ 346.999722][ C1] schedule_timeout+0x486/0xc50
[ 347.004550][ C1] ? rwlock_bug.part.0+0x90/0x90
[ 347.009465][ C1] ? usleep_range+0x170/0x170
[ 347.014118][ C1] ? trace_hardirqs_on+0x67/0x240
[ 347.019133][ C1] ? __kasan_check_read+0x11/0x20
[ 347.024148][ C1] ? __next_timer_interrupt+0x1a0/0x1a0
[ 347.029675][ C1] ? swake_up_one+0x60/0x60
[ 347.034170][ C1] rcu_gp_kthread+0x9b2/0x18c0
[ 347.038917][ C1] ? rcu_barrier+0x310/0x310
[ 347.043485][ C1] ? trace_hardirqs_on+0x67/0x240
[ 347.048678][ C1] ? __kasan_check_read+0x11/0x20
[ 347.053688][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[ 347.059918][ C1] ? __kthread_parkme+0x108/0x1c0
[ 347.065026][ C1] ? __kasan_check_read+0x11/0x20
[ 347.070043][ C1] kthread+0x361/0x430
[ 347.074096][ C1] ? rcu_barrier+0x310/0x310
[ 347.078666][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20
[ 347.084885][ C1] ret_from_fork+0x24/0x30
[ 347.089322][ C1] NMI backtrace for cpu 1
[ 347.093718][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0-rc8+ #0
[ 347.100808][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 347.110842][ C1] Call Trace:
[ 347.114107][ C1]
[ 347.117001][ C1] dump_stack+0x172/0x1f0
[ 347.121327][ C1] nmi_cpu_backtrace.cold+0x70/0xb2
[ 347.126537][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 347.132767][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45
[ 347.138398][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b
[ 347.144533][ C1] arch_trigger_cpumask_backtrace+0x14/0x20
[ 347.150405][ C1] rcu_dump_cpu_stacks+0x183/0x1cf
[ 347.155498][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13
[ 347.161197][ C1] ? raise_softirq+0x138/0x340
[ 347.165951][ C1] update_process_times+0x32/0x80
[ 347.170953][ C1] tick_sched_handle+0xa2/0x190
[ 347.175781][ C1] tick_sched_timer+0x53/0x140
[ 347.180527][ C1] __hrtimer_run_queues+0x364/0xe40
[ 347.185711][ C1] ? tick_sched_do_timer+0x1b0/0x1b0
[ 347.190976][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0
[ 347.196589][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20
[ 347.202387][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440
[ 347.208550][ C1] hrtimer_interrupt+0x314/0x770
[ 347.213545][ C1] smp_apic_timer_interrupt+0x160/0x610
[ 347.219251][ C1] apic_timer_interrupt+0xf/0x20
[ 347.224211][ C1] RIP: 0010:hhf_dequeue+0x506/0xa20
[ 347.229409][ C1] Code: 00 0f 85 35 04 00 00 4c 89 f8 4c 89 7b 08 48 c1 e8 03 42 80 3c 20 00 0f 85 12 04 00 00 49 89 1f e9 4b fb ff ff e8 7a 05 ac fb <48> 8b 45 b8 4c 8b 75 c8 42 80 3c 20 00 0f 85 3a 04 00 00 49 8b 85
[ 347.249000][ C1] RSP: 0018:ffff8880ae908f28 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13
[ 347.257391][ C1] RAX: ffff8880a98c6340 RBX: ffff88809290f9b8 RCX: ffffffff85c670f9
[ 347.265391][ C1] RDX: 0000000000000100 RSI: ffffffff85c66f86 RDI: ffff88809290f9c0
[ 347.273353][ C1] RBP: ffff8880ae908f78 R08: ffff8880a98c6340 R09: 0000000000000000
[ 347.281357][ C1] R10: fffffbfff134afaf R11: ffff8880a98c6340 R12: dffffc0000000000
[ 347.289311][ C1] R13: ffff88809290f6c0 R14: ffff88809290fa40 R15: ffff88809290fa50
[ 347.297549][ C1] ? apic_timer_interrupt+0xa/0x20
[ 347.302642][ C1] ? hhf_dequeue+0x679/0xa20
[ 347.307218][ C1] ? hhf_dequeue+0x506/0xa20
[ 347.311793][ C1] ? hhf_dequeue+0x506/0xa20
[ 347.316440][ C1] __qdisc_run+0x1e7/0x19d0
[ 347.320950][ C1] ? dev_queue_xmit+0x18/0x20
[ 347.325609][ C1] __dev_queue_xmit+0x16f1/0x3650
[ 347.330612][ C1] ? __local_bh_enable_ip+0x15a/0x270
[ 347.337258][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0
[ 347.342550][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[ 347.348909][ C1] ? br_nf_post_routing+0xd73/0x1d30
[ 347.354214][ C1] ? br_forward_finish+0x235/0x400
[ 347.359327][ C1] ? __kasan_check_read+0x11/0x20
[ 347.364356][ C1] ? __dev_queue_xmit+0x2b15/0x3650
[ 347.369546][ C1] dev_queue_xmit+0x18/0x20
[ 347.374031][ C1] ? dev_queue_xmit+0x18/0x20
[ 347.378690][ C1] br_dev_queue_push_xmit+0x3f3/0x5c0
[ 347.384104][ C1] ? nf_hook_slow+0xf0/0x1e0
[ 347.388679][ C1] br_forward_finish+0xfa/0x400
[ 347.393512][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0
[ 347.399128][ C1] ? br_fdb_add.cold+0x8c/0x8c
[ 347.404057][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20
[ 347.409769][ C1] ? nf_hook_slow+0xf0/0x1e0
[ 347.414633][ C1] __br_forward+0x641/0xb00
[ 347.419454][ C1] ? br_forward_finish+0x400/0x400
[ 347.424655][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0
[ 347.430374][ C1] deliver_clone+0x61/0xc0
[ 347.434866][ C1] maybe_deliver+0x2c7/0x390
[ 347.439538][ C1] br_flood+0x13a/0x3d0
[ 347.443831][ C1] br_dev_xmit+0x98c/0x15a0
[ 347.448342][ C1] ? br_poll_controller+0x10/0x10
[ 347.453350][ C1] ? netif_skb_features+0x6c2/0xb90
[ 347.458583][ C1] ? netdev_set_sb_channel+0xe0/0xe0
[ 347.463858][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[ 347.470126][ C1] ? validate_xmit_xfrm+0x43c/0xf10
[ 347.475408][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 347.481643][ C1] dev_hard_start_xmit+0x1a3/0x9c0
[ 347.486739][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 347.492965][ C1] __dev_queue_xmit+0x2b15/0x3650
[ 347.497986][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0
[ 347.503396][ C1] ? __ip6_finish_output+0x444/0xa50
[ 347.508696][ C1] ? __kasan_check_read+0x11/0x20
[ 347.514088][ C1] ? ipv6_chk_mcast_addr+0x315/0x6f0
[ 347.519358][ C1] ? lock_downgrade+0x920/0x920
[ 347.524248][ C1] ? lock_acquire+0x190/0x410
[ 347.529089][ C1] ? __ip6_finish_output+0x444/0xa50
[ 347.534536][ C1] dev_queue_xmit+0x18/0x20
[ 347.539992][ C1] ? dev_queue_xmit+0x18/0x20
[ 347.544652][ C1] ip6_finish_output2+0xf58/0x2520
[ 347.549750][ C1] ? ip6_forward_finish+0x530/0x530
[ 347.555013][ C1] ? ip6_mtu+0x16f/0x460
[ 347.559239][ C1] __ip6_finish_output+0x444/0xa50
[ 347.564330][ C1] ? __ip6_finish_output+0x444/0xa50
[ 347.569597][ C1] ip6_finish_output+0x38/0x1f0
[ 347.574441][ C1] ip6_output+0x235/0x7c0
[ 347.578902][ C1] ? ip6_finish_output+0x1f0/0x1f0
[ 347.586723][ C1] ? __ip6_finish_output+0xa50/0xa50
[ 347.592081][ C1] ? icmp6_dst_alloc+0x432/0x660
[ 347.597004][ C1] mld_sendpack+0x9c7/0xea0
[ 347.601527][ C1] ? nf_hook.constprop.0+0x560/0x560
[ 347.606815][ C1] ? mld_ifc_timer_expire+0x437/0x8a0
[ 347.612187][ C1] ? __local_bh_enable_ip+0x15a/0x270
[ 347.617540][ C1] mld_ifc_timer_expire+0x449/0x8a0
[ 347.622725][ C1] call_timer_fn+0x1ac/0x780
[ 347.627296][ C1] ? mld_dad_timer_expire+0x1c0/0x1c0
[ 347.632740][ C1] ? msleep_interruptible+0x150/0x150
[ 347.638095][ C1] ? trace_hardirqs_on+0x67/0x240
[ 347.643105][ C1] ? __kasan_check_read+0x11/0x20
[ 347.648114][ C1] ? mld_dad_timer_expire+0x1c0/0x1c0
[ 347.653466][ C1] ? mld_dad_timer_expire+0x1c0/0x1c0
[ 347.658848][ C1] run_timer_softirq+0x697/0x17a0
[ 347.663860][ C1] ? add_timer+0x930/0x930
[ 347.668256][ C1] ? kvm_clock_read+0x18/0x30
[ 347.672910][ C1] ? kvm_sched_clock_read+0x9/0x20
[ 347.678002][ C1] ? sched_clock+0x2e/0x50
[ 347.682414][ C1] ? sched_clock_cpu+0x1b/0x1b0
[ 347.687250][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 347.693492][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 347.700424][ C1] __do_softirq+0x262/0x98c
[ 347.704928][ C1] ? sched_clock_cpu+0x1b/0x1b0
[ 347.709771][ C1] irq_exit+0x19b/0x1e0
[ 347.713909][ C1] smp_apic_timer_interrupt+0x1a3/0x610
[ 347.719439][ C1] apic_timer_interrupt+0xf/0x20
[ 347.724384][ C1]
[ 347.727321][ C1] RIP: 0010:native_safe_halt+0xe/0x10
[ 347.732679][ C1] Code: 88 63 6e fa eb 8a 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 24 0b 4a 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 14 0b 4a 00 fb f4 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 2e 23 22 fa e8 f9
[ 347.752620][ C1] RSP: 0018:ffff8880a98dfd68 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 347.761104][ C1] RAX: 1ffffffff11a5e8d RBX: ffff8880a98c6340 RCX: 1ffffffff134b5ee
[ 347.769077][ C1] RDX: dffffc0000000000 RSI: ffffffff8177f15e RDI: ffffffff873e150c
[ 347.777030][ C1] RBP: ffff8880a98dfd98 R08: ffff8880a98c6340 R09: ffffed1015318c69
[ 347.784994][ C1] R10: ffffed1015318c68 R11: ffff8880a98c6347 R12: dffffc0000000000
[ 347.793293][ C1] R13: ffffffff89a57d78 R14: 0000000000000000 R15: 0000000000000001
[ 347.801269][ C1] ? trace_hardirqs_on+0x5e/0x240
[ 347.806284][ C1] ? default_idle+0x1c/0x360
[ 347.810868][ C1] ? default_idle+0x4e/0x360
[ 347.815458][ C1] arch_cpu_idle+0xa/0x10
[ 347.819768][ C1] default_idle_call+0x84/0xb0
[ 347.824525][ C1] do_idle+0x413/0x760
[ 347.828576][ C1] ? arch_cpu_idle_exit+0x80/0x80
[ 347.833668][ C1] ? _raw_spin_unlock_irqrestore+0xa4/0xe0
[ 347.839475][ C1] ? complete+0x61/0x80
[ 347.843613][ C1] cpu_startup_entry+0x1b/0x20
[ 347.848359][ C1] start_secondary+0x315/0x430
[ 347.854072][ C1] ? set_cpu_sibling_map+0x2180/0x2180
[ 347.859515][ C1] secondary_startup_64+0xa4/0xb0