[....] 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.
[ 63.710620][ T26] kauditd_printk_skb: 7 callbacks suppressed
[ 63.710629][ T26] audit: type=1800 audit(1568459069.541:29): pid=9659 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
[ 63.737151][ T26] audit: type=1800 audit(1568459069.541:30): pid=9659 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 '10.128.0.134' (ECDSA) to the list of known hosts.
syzkaller login: [ 232.479481][ T9809] IPVS: ftp: loaded support on port[0] = 21
[ 232.531303][ T9809] chnl_net:caif_netlink_parms(): no params data found
[ 232.553068][ T9809] bridge0: port 1(bridge_slave_0) entered blocking state
[ 232.560459][ T9809] bridge0: port 1(bridge_slave_0) entered disabled state
[ 232.568243][ T9809] device bridge_slave_0 entered promiscuous mode
[ 232.575305][ T9809] bridge0: port 2(bridge_slave_1) entered blocking state
[ 232.582589][ T9809] bridge0: port 2(bridge_slave_1) entered disabled state
[ 232.590147][ T9809] device bridge_slave_1 entered promiscuous mode
[ 232.603096][ T9809] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[ 232.613387][ T9809] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[ 232.630986][ T9809] team0: Port device team_slave_0 added
[ 232.637888][ T9809] team0: Port device team_slave_1 added
[ 232.717174][ T9809] device hsr_slave_0 entered promiscuous mode
[ 232.765965][ T9809] device hsr_slave_1 entered promiscuous mode
[ 232.830496][ T9809] bridge0: port 2(bridge_slave_1) entered blocking state
[ 232.837592][ T9809] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 232.844906][ T9809] bridge0: port 1(bridge_slave_0) entered blocking state
[ 232.851990][ T9809] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 232.875471][ T9809] 8021q: adding VLAN 0 to HW filter on device bond0
[ 232.885260][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[ 232.905449][ T5] bridge0: port 1(bridge_slave_0) entered disabled state
[ 232.913006][ T5] bridge0: port 2(bridge_slave_1) entered disabled state
[ 232.920982][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready
[ 232.930668][ T9809] 8021q: adding VLAN 0 to HW filter on device team0
[ 232.939654][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready
[ 232.948045][ T17] bridge0: port 1(bridge_slave_0) entered blocking state
[ 232.955200][ T17] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 232.964560][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready
[ 232.973417][ T5] bridge0: port 2(bridge_slave_1) entered blocking state
[ 232.980611][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 232.993803][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready
[ 233.002177][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
[ 233.011918][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready
[ 233.022251][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready
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[ 233.032226][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
[ 233.041848][ T9809] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
[ 233.055962][ T9809] 8021q: adding VLAN 0 to HW filter on device batadv0
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[ 338.355536][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU
[ 338.362174][ C0] rcu: 0-...!: (1 GPs behind) idle=412/0/0x3 softirq=9630/9634 fqs=2
[ 338.370387][ C0] (t=10501 jiffies g=9297 q=186)
[ 338.375393][ C0] rcu: rcu_preempt kthread starved for 10497 jiffies! g9297 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
[ 338.386640][ C0] rcu: RCU grace-period kthread stack dump:
[ 338.392512][ C0] rcu_preempt I29520 10 2 0x80004000
[ 338.398824][ C0] Call Trace:
[ 338.402198][ C0] __schedule+0x755/0x1580
[ 338.406601][ C0] ? __sched_text_start+0x8/0x8
[ 338.411435][ C0] schedule+0xd9/0x260
[ 338.415488][ C0] schedule_timeout+0x486/0xc50
[ 338.420320][ C0] ? rwlock_bug.part.0+0x90/0x90
[ 338.425240][ C0] ? usleep_range+0x170/0x170
[ 338.429897][ C0] ? trace_hardirqs_on+0x67/0x240
[ 338.434911][ C0] ? __kasan_check_read+0x11/0x20
[ 338.440611][ C0] ? __next_timer_interrupt+0x1a0/0x1a0
[ 338.446136][ C0] ? swake_up_one+0x60/0x60
[ 338.450643][ C0] rcu_gp_kthread+0x9b2/0x18c0
[ 338.455389][ C0] ? rcu_barrier+0x310/0x310
[ 338.459963][ C0] ? trace_hardirqs_on+0x67/0x240
[ 338.464966][ C0] ? __kasan_check_read+0x11/0x20
[ 338.469975][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[ 338.476214][ C0] ? __kthread_parkme+0x108/0x1c0
[ 338.481216][ C0] ? __kasan_check_read+0x11/0x20
[ 338.486247][ C0] kthread+0x361/0x430
[ 338.490303][ C0] ? rcu_barrier+0x310/0x310
[ 338.494880][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20
[ 338.501103][ C0] ret_from_fork+0x24/0x30
[ 338.505536][ C0] NMI backtrace for cpu 0
[ 338.509851][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.3.0-rc8+ #0
[ 338.517021][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 338.527055][ C0] Call Trace:
[ 338.530320][ C0]
[ 338.533244][ C0] dump_stack+0x172/0x1f0
[ 338.537557][ C0] nmi_cpu_backtrace.cold+0x70/0xb2
[ 338.542753][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 338.548981][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45
[ 338.554604][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b
[ 338.560795][ C0] arch_trigger_cpumask_backtrace+0x14/0x20
[ 338.566671][ C0] rcu_dump_cpu_stacks+0x183/0x1cf
[ 338.571777][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13
[ 338.577303][ C0] ? raise_softirq+0x138/0x340
[ 338.582049][ C0] update_process_times+0x32/0x80
[ 338.587059][ C0] tick_sched_handle+0xa2/0x190
[ 338.591890][ C0] tick_sched_timer+0x53/0x140
[ 338.596636][ C0] __hrtimer_run_queues+0x364/0xe40
[ 338.601819][ C0] ? tick_sched_do_timer+0x1b0/0x1b0
[ 338.607087][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0
[ 338.612623][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20
[ 338.618335][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440
[ 338.624380][ C0] hrtimer_interrupt+0x314/0x770
[ 338.629354][ C0] smp_apic_timer_interrupt+0x160/0x610
[ 338.634881][ C0] apic_timer_interrupt+0xf/0x20
[ 338.639842][ C0] RIP: 0010:hhf_dequeue+0x6ba/0xa20
[ 338.645027][ C0] Code: e8 03 42 80 3c 20 00 0f 85 08 03 00 00 48 89 d8 49 89 9d 98 03 00 00 48 c1 e8 03 42 80 3c 20 00 0f 85 b4 02 00 00 48 8b 45 c8 <48> 8d 7b 08 48 89 03 48 89 f8 48 c1 e8 03 42 80 3c 20 00 0f 85 8d
[ 338.664620][ C0] RSP: 0018:ffff8880ae809038 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
[ 338.673022][ C0] RAX: ffff88809f9f7a10 RBX: ffff88809f9f7978 RCX: ffffffff85c670f9
[ 338.680974][ C0] RDX: 0000000000000100 RSI: ffffffff85c6710b RDI: 0000000000000001
[ 338.688925][ C0] RBP: ffff8880ae809088 R08: ffffffff88c7a1c0 R09: 0000000000000000
[ 338.696878][ C0] R10: fffffbfff134afaf R11: ffffffff88c7a1c0 R12: dffffc0000000000
[ 338.704835][ C0] R13: ffff88809f9f7680 R14: ffff88809f9f7a18 R15: ffff88809f9f7a10
[ 338.712795][ C0] ? apic_timer_interrupt+0xa/0x20
[ 338.717902][ C0] ? hhf_dequeue+0x679/0xa20
[ 338.722476][ C0] ? hhf_dequeue+0x68b/0xa20
[ 338.727047][ C0] ? hhf_dequeue+0x68b/0xa20
[ 338.731684][ C0] __qdisc_run+0x1e7/0x19d0
[ 338.736197][ C0] ? dev_queue_xmit+0x18/0x20
[ 338.740856][ C0] __dev_queue_xmit+0x16f1/0x3650
[ 338.745861][ C0] ? __local_bh_enable_ip+0x15a/0x270
[ 338.751217][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0
[ 338.756487][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[ 338.762743][ C0] ? br_nf_post_routing+0xd73/0x1d30
[ 338.768126][ C0] ? br_forward_finish+0x235/0x400
[ 338.773219][ C0] ? __kasan_check_read+0x11/0x20
[ 338.778223][ C0] ? __dev_queue_xmit+0x2b15/0x3650
[ 338.783402][ C0] dev_queue_xmit+0x18/0x20
[ 338.787886][ C0] ? dev_queue_xmit+0x18/0x20
[ 338.792543][ C0] br_dev_queue_push_xmit+0x3f3/0x5c0
[ 338.797961][ C0] ? nf_hook_slow+0xf0/0x1e0
[ 338.802546][ C0] br_forward_finish+0xfa/0x400
[ 338.807382][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0
[ 338.812913][ C0] ? br_fdb_add.cold+0x8c/0x8c
[ 338.817655][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20
[ 338.823448][ C0] ? nf_hook_slow+0xf0/0x1e0
[ 338.828019][ C0] __br_forward+0x641/0xb00
[ 338.832498][ C0] ? br_forward_finish+0x400/0x400
[ 338.837586][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0
[ 338.843113][ C0] deliver_clone+0x61/0xc0
[ 338.847506][ C0] maybe_deliver+0x2c7/0x390
[ 338.852092][ C0] br_flood+0x13a/0x3d0
[ 338.856273][ C0] br_dev_xmit+0x98c/0x15a0
[ 338.860779][ C0] ? br_poll_controller+0x10/0x10
[ 338.865781][ C0] ? netif_skb_features+0x6c2/0xb90
[ 338.870995][ C0] ? netdev_set_sb_channel+0xe0/0xe0
[ 338.876261][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[ 338.882514][ C0] ? validate_xmit_xfrm+0x43c/0xf10
[ 338.887691][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 338.893907][ C0] dev_hard_start_xmit+0x1a3/0x9c0
[ 338.898996][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 338.905216][ C0] __dev_queue_xmit+0x2b15/0x3650
[ 338.910219][ C0] ? __nf_conntrack_find_get+0xa97/0x13a0
[ 338.915919][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0
[ 338.921257][ C0] ? __ip_finish_output+0x5fc/0xb90
[ 338.926435][ C0] ? __kasan_check_read+0x11/0x20
[ 338.931452][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[ 338.937675][ C0] ? __nf_ct_refresh_acct+0x93/0x2d0
[ 338.942936][ C0] ? lock_downgrade+0x920/0x920
[ 338.947769][ C0] ? lock_acquire+0x190/0x410
[ 338.952421][ C0] ? __ip_finish_output+0x5fc/0xb90
[ 338.957688][ C0] dev_queue_xmit+0x18/0x20
[ 338.962178][ C0] ? dev_queue_xmit+0x18/0x20
[ 338.966833][ C0] ip_finish_output2+0x1726/0x2570
[ 338.971960][ C0] ? nf_ct_deliver_cached_events+0x23d/0x6e0
[ 338.977929][ C0] ? ip_frag_next+0x910/0x910
[ 338.982583][ C0] ? __kasan_check_read+0x11/0x20
[ 338.987595][ C0] __ip_finish_output+0x5fc/0xb90
[ 338.992600][ C0] ? __ip_finish_output+0x5fc/0xb90
[ 338.997796][ C0] ? audit_alloc_mark+0x420/0x500
[ 339.002809][ C0] ip_finish_output+0x38/0x1f0
[ 339.007551][ C0] ip_output+0x21f/0x640
[ 339.011773][ C0] ? ip_mc_output+0xf40/0xf40
[ 339.016428][ C0] ? __ip_finish_output+0xb90/0xb90
[ 339.021792][ C0] ? __kasan_check_read+0x11/0x20
[ 339.026799][ C0] ip_local_out+0xbb/0x190
[ 339.031244][ C0] igmpv3_sendpack+0x1b5/0x2c0
[ 339.036001][ C0] igmp_ifc_timer_expire+0x687/0xa00
[ 339.041264][ C0] ? call_timer_fn+0xe0/0x780
[ 339.045937][ C0] call_timer_fn+0x1ac/0x780
[ 339.050535][ C0] ? __ip_mc_dec_group+0x520/0x520
[ 339.055633][ C0] ? msleep_interruptible+0x150/0x150
[ 339.060995][ C0] ? trace_hardirqs_on+0x67/0x240
[ 339.066003][ C0] ? __kasan_check_read+0x11/0x20
[ 339.071208][ C0] ? __ip_mc_dec_group+0x520/0x520
[ 339.076302][ C0] ? __ip_mc_dec_group+0x520/0x520
[ 339.081397][ C0] run_timer_softirq+0x697/0x17a0
[ 339.086667][ C0] ? add_timer+0x930/0x930
[ 339.091063][ C0] ? kvm_clock_read+0x18/0x30
[ 339.095720][ C0] ? kvm_sched_clock_read+0x9/0x20
[ 339.100825][ C0] ? sched_clock+0x2e/0x50
[ 339.105223][ C0] ? sched_clock_cpu+0x1b/0x1b0
[ 339.110063][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 339.116286][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 339.122518][ C0] __do_softirq+0x262/0x98c
[ 339.127018][ C0] ? sched_clock_cpu+0x1b/0x1b0
[ 339.131852][ C0] irq_exit+0x19b/0x1e0
[ 339.135989][ C0] smp_apic_timer_interrupt+0x1a3/0x610
[ 339.141514][ C0] apic_timer_interrupt+0xf/0x20
[ 339.146427][ C0]
[ 339.149347][ C0] RIP: 0010:native_safe_halt+0xe/0x10
[ 339.154702][ C0] 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
[ 339.174386][ C0] RSP: 0018:ffffffff88c07ce8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 339.183212][ C0] RAX: 1ffffffff11a5e8d RBX: ffffffff88c7a1c0 RCX: 1ffffffff134b5ee
[ 339.191169][ C0] RDX: dffffc0000000000 RSI: ffffffff8177f15e RDI: ffffffff873e150c
[ 339.199132][ C0] RBP: ffffffff88c07d18 R08: ffffffff88c7a1c0 R09: fffffbfff118f439
[ 339.207085][ C0] R10: fffffbfff118f438 R11: ffffffff88c7a1c7 R12: dffffc0000000000
[ 339.215037][ C0] R13: ffffffff89a57d78 R14: 0000000000000000 R15: 0000000000000000
[ 339.223531][ C0] ? trace_hardirqs_on+0x5e/0x240
[ 339.228544][ C0] ? default_idle+0x1c/0x360
[ 339.233134][ C0] ? default_idle+0x4e/0x360
[ 339.237711][ C0] arch_cpu_idle+0xa/0x10
[ 339.242026][ C0] default_idle_call+0x84/0xb0
[ 339.246869][ C0] do_idle+0x413/0x760
[ 339.250933][ C0] ? arch_cpu_idle_exit+0x80/0x80
[ 339.255948][ C0] ? trace_hardirqs_on+0x67/0x240
[ 339.261051][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 339.267278][ C0] ? debug_smp_processor_id+0x3c/0x214
[ 339.272893][ C0] cpu_startup_entry+0x1b/0x20
[ 339.277650][ C0] rest_init+0x245/0x37b
[ 339.281930][ C0] arch_call_rest_init+0xe/0x1b
[ 339.288326][ C0] start_kernel+0x912/0x951
[ 339.292806][ C0] ? mem_encrypt_init+0xb/0xb
[ 339.297479][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 339.303727][ C0] ? x86_family+0x41/0x50
[ 339.308052][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[ 339.314288][ C0] x86_64_start_reservations+0x29/0x2b
[ 339.319736][ C0] x86_64_start_kernel+0x77/0x7b
[ 339.324656][ C0] secondary_startup_64+0xa4/0xb0