[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 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