[....] 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. [ 64.277815][ T26] kauditd_printk_skb: 7 callbacks suppressed [ 64.277825][ T26] audit: type=1800 audit(1567932014.398:29): pid=9665 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 [ 64.311230][ T26] audit: type=1800 audit(1567932014.398:30): pid=9665 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 '10.128.0.100' (ECDSA) to the list of known hosts. syzkaller login: [ 75.013501][ T9817] IPVS: ftp: loaded support on port[0] = 21 [ 75.061516][ T9817] chnl_net:caif_netlink_parms(): no params data found [ 75.083447][ T9817] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.090982][ T9817] bridge0: port 1(bridge_slave_0) entered disabled state [ 75.098521][ T9817] device bridge_slave_0 entered promiscuous mode [ 75.106212][ T9817] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.113277][ T9817] bridge0: port 2(bridge_slave_1) entered disabled state [ 75.120877][ T9817] device bridge_slave_1 entered promiscuous mode [ 75.134049][ T9817] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 75.144517][ T9817] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 75.160709][ T9817] team0: Port device team_slave_0 added [ 75.167575][ T9817] team0: Port device team_slave_1 added [ 75.217253][ T9817] device hsr_slave_0 entered promiscuous mode [ 75.275816][ T9817] device hsr_slave_1 entered promiscuous mode [ 75.320591][ T9817] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.327829][ T9817] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.335105][ T9817] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.343106][ T9817] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.367957][ T9817] 8021q: adding VLAN 0 to HW filter on device bond0 [ 75.377964][ T3022] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 75.397214][ T3022] bridge0: port 1(bridge_slave_0) entered disabled state [ 75.404596][ T3022] bridge0: port 2(bridge_slave_1) entered disabled state [ 75.413120][ T3022] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 75.423191][ T9817] 8021q: adding VLAN 0 to HW filter on device team0 [ 75.432488][ T3516] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 75.440960][ T3516] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.448268][ T3516] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.458498][ T3022] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 75.467001][ T3022] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.474082][ T3022] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.492434][ T9817] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 75.503084][ T9817] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 75.516407][ T3516] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 75.524953][ T3516] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 75.533484][ T3516] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 75.542069][ T3516] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 75.550560][ T3516] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 75.558164][ T3516] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready executing program [ 75.572599][ T9817] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 180.635469][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 180.642115][ C0] rcu: 0-...!: (1 GPs behind) idle=c62/1/0x4000000000000004 softirq=10134/10135 fqs=3 [ 180.651804][ C0] (t=10501 jiffies g=8957 q=37) [ 180.656724][ C0] rcu: rcu_preempt kthread starved for 10496 jiffies! g8957 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 180.667968][ C0] rcu: RCU grace-period kthread stack dump: [ 180.673844][ C0] rcu_preempt I29392 10 2 0x80004000 [ 180.680153][ C0] Call Trace: [ 180.683449][ C0] __schedule+0x755/0x1580 [ 180.687865][ C0] ? __sched_text_start+0x8/0x8 [ 180.692698][ C0] schedule+0xd9/0x260 [ 180.696745][ C0] schedule_timeout+0x486/0xc50 [ 180.701668][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 180.706785][ C0] ? usleep_range+0x170/0x170 [ 180.711446][ C0] ? trace_hardirqs_on+0x67/0x240 [ 180.716451][ C0] ? __kasan_check_read+0x11/0x20 [ 180.721475][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 180.727000][ C0] ? swake_up_one+0x60/0x60 [ 180.731494][ C0] rcu_gp_kthread+0x9b2/0x18c0 [ 180.736250][ C0] ? rcu_barrier+0x310/0x310 [ 180.741166][ C0] ? trace_hardirqs_on+0x67/0x240 [ 180.746170][ C0] ? __kasan_check_read+0x11/0x20 [ 180.751271][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 180.757579][ C0] ? __kthread_parkme+0x108/0x1c0 [ 180.762587][ C0] ? __kasan_check_read+0x11/0x20 [ 180.767604][ C0] kthread+0x361/0x430 [ 180.771654][ C0] ? rcu_barrier+0x310/0x310 [ 180.776230][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 180.782454][ C0] ret_from_fork+0x24/0x30 [ 180.786878][ C0] NMI backtrace for cpu 0 [ 180.791187][ C0] CPU: 0 PID: 9817 Comm: syz-executor009 Not tainted 5.3.0-rc7+ #0 [ 180.799048][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 180.809094][ C0] Call Trace: [ 180.812456][ C0] [ 180.815311][ C0] dump_stack+0x172/0x1f0 [ 180.819625][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 180.824817][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 180.831040][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 180.836655][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 180.842717][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 180.849044][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 180.854222][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 180.859749][ C0] ? raise_softirq+0x138/0x340 [ 180.864497][ C0] update_process_times+0x32/0x80 [ 180.869515][ C0] tick_sched_handle+0xa2/0x190 [ 180.874548][ C0] tick_sched_timer+0x53/0x140 [ 180.879321][ C0] __hrtimer_run_queues+0x364/0xe40 [ 180.884517][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 180.889915][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 180.895452][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 180.901173][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 180.907237][ C0] hrtimer_interrupt+0x314/0x770 [ 180.912420][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 180.917953][ C0] apic_timer_interrupt+0xf/0x20 [ 180.923045][ C0] RIP: 0010:hhf_dequeue+0x86/0xa20 [ 180.928148][ C0] Code: 00 00 48 8b 75 d0 49 8b 85 80 03 00 00 49 89 f6 48 39 c6 0f 84 8c 04 00 00 e8 46 17 ac fb 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 <0f> 85 6d 07 00 00 49 8b 1e 48 8d 7b 10 48 89 f8 48 c1 e8 03 42 0f [ 180.947817][ C0] RSP: 0018:ffff8880ae809038 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 180.956464][ C0] RAX: 1ffff11014f4c22a RBX: ffff8880a7a610b8 RCX: ffffffff85c66409 [ 180.964586][ C0] RDX: 0000000000000100 RSI: ffffffff85c65e0a RDI: ffff8880a7a610c0 [ 180.972538][ C0] RBP: ffff8880ae809088 R08: ffff8880a16fe0c0 R09: 0000000000000000 [ 180.980502][ C0] R10: fffffbfff134af9f R11: ffff8880a16fe0c0 R12: dffffc0000000000 [ 180.988449][ C0] R13: ffff8880a7a60dc0 R14: ffff8880a7a61150 R15: ffff8880a7a61150 [ 180.996411][ C0] ? apic_timer_interrupt+0xa/0x20 [ 181.001510][ C0] ? hhf_dequeue+0x679/0xa20 [ 181.006077][ C0] ? hhf_dequeue+0x7a/0xa20 [ 181.010569][ C0] ? hhf_dequeue+0x7a/0xa20 [ 181.015060][ C0] __qdisc_run+0x1e5/0x1a00 [ 181.019553][ C0] ? dev_queue_xmit+0x18/0x20 [ 181.024243][ C0] __dev_queue_xmit+0x16f1/0x3650 [ 181.029272][ C0] ? __local_bh_enable_ip+0x15a/0x270 [ 181.034643][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 181.039927][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 181.046180][ C0] ? br_nf_post_routing+0xd73/0x1d30 [ 181.051451][ C0] ? br_forward_finish+0x235/0x400 [ 181.056545][ C0] ? __kasan_check_read+0x11/0x20 [ 181.061551][ C0] ? __dev_queue_xmit+0x2b15/0x3650 [ 181.066730][ C0] dev_queue_xmit+0x18/0x20 [ 181.071217][ C0] ? dev_queue_xmit+0x18/0x20 [ 181.076147][ C0] br_dev_queue_push_xmit+0x3f3/0x5c0 [ 181.081505][ C0] ? nf_hook_slow+0xf0/0x1e0 [ 181.086074][ C0] br_forward_finish+0xfa/0x400 [ 181.090906][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 181.096430][ C0] ? br_fdb_add.cold+0x8c/0x8c [ 181.101174][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 181.106873][ C0] ? nf_hook_slow+0xf0/0x1e0 [ 181.111448][ C0] __br_forward+0x641/0xb00 [ 181.115930][ C0] ? br_forward_finish+0x400/0x400 [ 181.121027][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 181.126554][ C0] deliver_clone+0x61/0xc0 [ 181.130959][ C0] maybe_deliver+0x2c7/0x390 [ 181.135527][ C0] br_flood+0x13a/0x3d0 [ 181.139669][ C0] br_dev_xmit+0x98c/0x15a0 [ 181.145457][ C0] ? br_poll_controller+0x10/0x10 [ 181.150462][ C0] ? netif_skb_features+0x6c2/0xb90 [ 181.155640][ C0] ? netdev_set_sb_channel+0xe0/0xe0 [ 181.160912][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 181.167128][ C0] ? validate_xmit_xfrm+0x43c/0xf10 [ 181.172306][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 181.178527][ C0] dev_hard_start_xmit+0x1a3/0x9c0 [ 181.183620][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 181.189839][ C0] __dev_queue_xmit+0x2b15/0x3650 [ 181.194842][ C0] ? __nf_conntrack_find_get+0xa97/0x13a0 [ 181.200540][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 181.205823][ C0] ? __ip_finish_output+0x5fc/0xb90 [ 181.211021][ C0] ? __kasan_check_read+0x11/0x20 [ 181.216050][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 181.222274][ C0] ? __nf_ct_refresh_acct+0x93/0x2d0 [ 181.227550][ C0] ? lock_downgrade+0x920/0x920 [ 181.232463][ C0] ? lock_acquire+0x190/0x410 [ 181.237123][ C0] ? __ip_finish_output+0x5fc/0xb90 [ 181.242300][ C0] dev_queue_xmit+0x18/0x20 [ 181.246783][ C0] ? dev_queue_xmit+0x18/0x20 [ 181.251445][ C0] ip_finish_output2+0x1726/0x2570 [ 181.256881][ C0] ? nf_ct_deliver_cached_events+0x23d/0x6e0 [ 181.262840][ C0] ? ip_frag_next+0x910/0x910 [ 181.267504][ C0] ? __kasan_check_read+0x11/0x20 [ 181.272509][ C0] __ip_finish_output+0x5fc/0xb90 [ 181.277610][ C0] ? __ip_finish_output+0x5fc/0xb90 [ 181.282785][ C0] ? audit_alloc_mark+0x3d0/0x500 [ 181.287798][ C0] ip_finish_output+0x38/0x1f0 [ 181.292540][ C0] ip_output+0x21f/0x640 [ 181.296763][ C0] ? ip_mc_output+0xf40/0xf40 [ 181.301857][ C0] ? __ip_finish_output+0xb90/0xb90 [ 181.307043][ C0] ? __kasan_check_read+0x11/0x20 [ 181.312052][ C0] ip_local_out+0xbb/0x190 [ 181.316457][ C0] igmpv3_sendpack+0x1b5/0x2c0 [ 181.321209][ C0] igmp_ifc_timer_expire+0x687/0xa00 [ 181.326504][ C0] ? call_timer_fn+0xe0/0x780 [ 181.331162][ C0] call_timer_fn+0x1ac/0x780 [ 181.335731][ C0] ? __ip_mc_dec_group+0x520/0x520 [ 181.340822][ C0] ? msleep_interruptible+0x150/0x150 [ 181.346173][ C0] ? trace_hardirqs_on+0x67/0x240 [ 181.351174][ C0] ? __kasan_check_read+0x11/0x20 [ 181.356177][ C0] ? __ip_mc_dec_group+0x520/0x520 [ 181.361279][ C0] ? __ip_mc_dec_group+0x520/0x520 [ 181.366367][ C0] run_timer_softirq+0x697/0x17a0 [ 181.371373][ C0] ? add_timer+0x930/0x930 [ 181.375766][ C0] ? kvm_clock_read+0x18/0x30 [ 181.380420][ C0] ? kvm_sched_clock_read+0x9/0x20 [ 181.385509][ C0] ? sched_clock+0x2e/0x50 [ 181.389990][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 181.394837][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 181.401067][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 181.408339][ C0] __do_softirq+0x262/0x98c [ 181.412820][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 181.417927][ C0] irq_exit+0x19b/0x1e0 [ 181.422061][ C0] smp_apic_timer_interrupt+0x1a3/0x610 [ 181.427588][ C0] apic_timer_interrupt+0xf/0x20 [ 181.432498][ C0] [ 181.435427][ C0] RIP: 0010:___might_sleep+0x4a/0x280 [ 181.440868][ C0] Code: 9b b1 52 08 00 0f 84 c5 01 00 00 e8 50 22 10 00 85 c0 74 0d 80 3d 84 b1 52 08 00 0f 84 72 01 00 00 65 4c 8b 3c 25 40 fe 01 00 <49> 8d bf 78 03 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 [ 181.460640][ C0] RSP: 0018:ffff8880943ff6d0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 181.469030][ C0] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffffffff134b5de [ 181.477067][ C0] RDX: 0000000000000000 RSI: 00000000000007df RDI: ffffffff882b7340 [ 181.485025][ C0] RBP: ffff8880943ff6f8 R08: ffff8880a16fe0c0 R09: fffffbfff118c1ae [ 181.492980][ C0] R10: fffffbfff118c1ad R11: ffffffff88c60d6b R12: ffffffff882b7340 [ 181.501028][ C0] R13: 00000000000007df R14: 0000000000000001 R15: ffff8880a16fe0c0 [ 181.509093][ C0] nf_ct_iterate_cleanup+0x22a/0x4e0 [ 181.514355][ C0] ? nf_ct_alloc_hashtable+0x150/0x150 [ 181.519882][ C0] nf_ct_iterate_cleanup_net+0x133/0x190 [ 181.525505][ C0] ? nf_nat_redirect_ipv4.cold+0x30/0x30 [ 181.531115][ C0] ? nf_ct_iterate_cleanup+0x4e0/0x4e0 [ 181.536551][ C0] ? nf_nat_redirect_ipv4.cold+0x30/0x30 [ 181.542167][ C0] masq_device_event+0xb5/0xe0 [ 181.546930][ C0] notifier_call_chain+0xc2/0x230 [ 181.552129][ C0] raw_notifier_call_chain+0x2e/0x40 [ 181.557399][ C0] call_netdevice_notifiers_info+0x3f/0x90 [ 181.563289][ C0] dev_close_many+0x33f/0x6f0 [ 181.568046][ C0] ? netdev_master_upper_dev_link+0x50/0x50 [ 181.573918][ C0] ? debug_check_no_obj_freed+0xc0/0x43f [ 181.579530][ C0] rollback_registered_many+0x33f/0xdd0 [ 181.585056][ C0] ? generic_xdp_install+0x3d0/0x3d0 [ 181.590332][ C0] ? linkwatch_fire_event+0xd8/0x200 [ 181.595682][ C0] ? __kasan_check_read+0x11/0x20 [ 181.600725][ C0] rollback_registered+0x109/0x1d0 [ 181.607989][ C0] ? rollback_registered_many+0xdd0/0xdd0 [ 181.613691][ C0] ? linkwatch_schedule_work+0x195/0x1d0 [ 181.619313][ C0] unregister_netdevice_queue+0x1ee/0x2c0 [ 181.625108][ C0] __tun_detach+0xd8a/0x1040 [ 181.629685][ C0] ? locks_remove_file+0x32f/0x600 [ 181.634785][ C0] ? fsnotify_first_mark+0x210/0x210 [ 181.640057][ C0] tun_chr_close+0xe0/0x180 [ 181.645319][ C0] __fput+0x2ff/0x890 [ 181.649279][ C0] ? __tun_detach+0x1040/0x1040 [ 181.654111][ C0] ____fput+0x16/0x20 [ 181.658074][ C0] task_work_run+0x145/0x1c0 [ 181.662655][ C0] do_exit+0x92f/0x2e50 [ 181.666802][ C0] ? mm_update_next_owner+0x640/0x640 [ 181.672161][ C0] ? down_read_non_owner+0x450/0x450 [ 181.677433][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 181.683672][ C0] ? handle_mm_fault+0x1d3/0x6b0 [ 181.688589][ C0] do_group_exit+0x135/0x360 [ 181.693165][ C0] __x64_sys_exit_group+0x44/0x50 [ 181.698690][ C0] do_syscall_64+0xfd/0x6a0 [ 181.703181][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 181.709068][ C0] RIP: 0033:0x441658 [ 181.712952][ C0] Code: Bad RIP value. [ 181.716999][ C0] RSP: 002b:00007ffcad1eca08 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 181.725392][ C0] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000441658 [ 181.733352][ C0] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001 [ 181.741302][ C0] RBP: 00000000004c81d0 R08: 00000000000000e7 R09: ffffffffffffffd4 [ 181.749254][ C0] R10: 0000000000000400 R11: 0000000000000246 R12: 0000000000000001 [ 181.757203][ C0] R13: 00000000006db600 R14: 0000000000000000 R15: 0000000000000000