[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [ 39.246701] audit: type=1800 audit(1568321738.364:33): pid=7427 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0 [ 39.269820] audit: type=1800 audit(1568321738.364:34): pid=7427 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2456 res=0 [ 40.413538] audit: type=1400 audit(1568321739.534:35): avc: denied { map } for pid=7603 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.35' (ECDSA) to the list of known hosts. syzkaller login: [ 47.002641] audit: type=1400 audit(1568321746.124:36): avc: denied { map } for pid=7616 comm="syz-executor248" path="/root/syz-executor248812044" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 47.031872] IPVS: ftp: loaded support on port[0] = 21 [ 47.086560] chnl_net:caif_netlink_parms(): no params data found [ 47.121013] bridge0: port 1(bridge_slave_0) entered blocking state [ 47.128108] bridge0: port 1(bridge_slave_0) entered disabled state [ 47.135440] device bridge_slave_0 entered promiscuous mode [ 47.143291] bridge0: port 2(bridge_slave_1) entered blocking state [ 47.149875] bridge0: port 2(bridge_slave_1) entered disabled state [ 47.157063] device bridge_slave_1 entered promiscuous mode [ 47.172250] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 47.181736] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 47.199879] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 47.207840] team0: Port device team_slave_0 added [ 47.213562] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 47.220996] team0: Port device team_slave_1 added [ 47.226403] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 47.234287] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 47.289526] device hsr_slave_0 entered promiscuous mode [ 47.337333] device hsr_slave_1 entered promiscuous mode [ 47.408000] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 47.415126] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 47.429749] bridge0: port 2(bridge_slave_1) entered blocking state [ 47.436865] bridge0: port 2(bridge_slave_1) entered forwarding state [ 47.443996] bridge0: port 1(bridge_slave_0) entered blocking state [ 47.450434] bridge0: port 1(bridge_slave_0) entered forwarding state [ 47.481751] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 47.489867] 8021q: adding VLAN 0 to HW filter on device bond0 [ 47.499010] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 47.509157] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 47.528672] bridge0: port 1(bridge_slave_0) entered disabled state [ 47.536347] bridge0: port 2(bridge_slave_1) entered disabled state [ 47.544655] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 47.555038] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 47.561673] 8021q: adding VLAN 0 to HW filter on device team0 [ 47.571409] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 47.579636] bridge0: port 1(bridge_slave_0) entered blocking state [ 47.585989] bridge0: port 1(bridge_slave_0) entered forwarding state [ 47.597201] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 47.604931] bridge0: port 2(bridge_slave_1) entered blocking state [ 47.611623] bridge0: port 2(bridge_slave_1) entered forwarding state [ 47.628003] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 47.636595] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 47.646218] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 47.661290] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 47.672433] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 47.683172] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 47.689914] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 47.698185] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 47.705800] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 47.718829] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready executing program [ 47.730136] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 152.766970] rcu: INFO: rcu_preempt self-detected stall on CPU [ 152.773096] rcu: 0-...!: (10500 ticks this GP) idle=05e/1/0x4000000000000002 softirq=10088/10092 fqs=6 [ 152.783989] rcu: (t=10500 jiffies g=5221 q=2) [ 152.788686] rcu: rcu_preempt kthread starved for 10488 jiffies! g5221 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 152.799447] rcu: RCU grace-period kthread stack dump: [ 152.804631] rcu_preempt I29424 10 2 0x80000000 [ 152.810436] Call Trace: [ 152.813204] __schedule+0x866/0x1dc0 [ 152.817099] ? pci_mmcfg_check_reserved+0x170/0x170 [ 152.822130] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 152.827319] ? lockdep_hardirqs_on+0x415/0x5d0 [ 152.831995] ? trace_hardirqs_on+0x67/0x220 [ 152.836316] schedule+0x92/0x1c0 [ 152.839816] schedule_timeout+0x4db/0xfc0 [ 152.843969] ? usleep_range+0x170/0x170 [ 152.847943] ? trace_hardirqs_on+0x67/0x220 [ 152.852375] ? kasan_check_read+0x11/0x20 [ 152.857047] ? __next_timer_interrupt+0x1a0/0x1a0 [ 152.862089] ? prepare_to_swait_exclusive+0x120/0x120 [ 152.867453] rcu_gp_kthread+0xd5c/0x2190 [ 152.871525] ? rcu_blocking_is_gp+0x90/0x90 [ 152.875930] ? trace_hardirqs_on+0x67/0x220 [ 152.880525] ? kasan_check_read+0x11/0x20 [ 152.884680] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 152.889778] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 152.895323] ? __kthread_parkme+0xfb/0x1b0 [ 152.899557] kthread+0x354/0x420 [ 152.903065] ? rcu_blocking_is_gp+0x90/0x90 [ 152.907384] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 152.913010] ret_from_fork+0x24/0x30 [ 152.916759] NMI backtrace for cpu 0 [ 152.920478] CPU: 0 PID: 14 Comm: kworker/0:1 Not tainted 4.19.72 #0 [ 152.926871] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 152.936321] Workqueue: ipv6_addrconf addrconf_dad_work [ 152.941698] Call Trace: [ 152.944288] [ 152.946439] dump_stack+0x172/0x1f0 [ 152.950064] nmi_cpu_backtrace.cold+0x63/0xa4 [ 152.954586] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 152.959517] nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 [ 152.964789] arch_trigger_cpumask_backtrace+0x14/0x20 [ 152.970335] rcu_dump_cpu_stacks+0x189/0x1d5 [ 152.974736] ? wake_up_process+0x10/0x20 [ 152.978800] rcu_check_callbacks.cold+0x5e3/0xd90 [ 152.983635] ? trace_hardirqs_off+0x62/0x220 [ 152.988075] update_process_times+0x32/0x80 [ 152.992491] tick_sched_handle+0xa2/0x190 [ 152.996641] tick_sched_timer+0x47/0x130 [ 153.000713] __hrtimer_run_queues+0x33b/0xdc0 [ 153.005204] ? tick_sched_do_timer+0x1b0/0x1b0 [ 153.009800] ? hrtimer_fixup_activate+0x30/0x30 [ 153.014547] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 153.019900] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 153.025637] hrtimer_interrupt+0x314/0x770 [ 153.029909] smp_apic_timer_interrupt+0x111/0x550 [ 153.034918] apic_timer_interrupt+0xf/0x20 [ 153.039253] [ 153.041488] RIP: 0010:__list_del_entry_valid+0x26/0xf5 [ 153.047111] Code: 75 e8 eb b2 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 41 56 49 89 fe 48 83 c7 08 48 89 fa 41 55 48 c1 ea 03 41 54 80 3c 02 00 <0f> 85 a1 00 00 00 4c 89 f2 4d 8b 66 08 48 b8 00 00 00 00 00 fc ff [ 153.067215] RSP: 0018:ffff8880aa26edd0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 153.074917] RAX: dffffc0000000000 RBX: ffff888098f58bf8 RCX: ffffffff858e78e9 [ 153.082383] RDX: 1ffff110131eb180 RSI: ffffffff858e7d9b RDI: ffff888098f58c00 [ 153.089733] RBP: ffff8880aa26ede8 R08: ffff8880aa25e380 R09: 0000000000000009 [ 153.097111] R10: ffff8880aa25ed68 R11: 00000000b4af0ddb R12: dffffc0000000000 [ 153.104458] R13: ffff888098f58940 R14: ffff888098f58bf8 R15: 0000000000000000 [ 153.111739] ? hhf_dequeue+0xb9/0xa00 [ 153.115541] ? hhf_dequeue+0x56b/0xa00 [ 153.119731] hhf_dequeue+0x5aa/0xa00 [ 153.123452] __qdisc_run+0x1e7/0x1960 [ 153.127521] __dev_queue_xmit+0x165c/0x2fe0 [ 153.131933] ? netdev_pick_tx+0x300/0x300 [ 153.136171] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 153.141727] ? br_nf_post_routing+0x780/0x12f0 [ 153.146495] ? br_forward_finish+0x235/0x400 [ 153.150988] ? find_held_lock+0x35/0x130 [ 153.155133] ? br_forward_finish+0x235/0x400 [ 153.159560] dev_queue_xmit+0x18/0x20 [ 153.163354] ? dev_queue_xmit+0x18/0x20 [ 153.167319] br_dev_queue_push_xmit+0x405/0x5d0 [ 153.171981] ? kasan_check_read+0x11/0x20 [ 153.176127] br_forward_finish+0xfa/0x400 [ 153.180270] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 153.185285] ? br_fdb_add.cold+0x8a/0x8a [ 153.189349] ? kasan_check_read+0x11/0x20 [ 153.193504] __br_forward+0x647/0xb30 [ 153.197300] ? br_forward_finish+0x400/0x400 [ 153.201702] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 153.206552] deliver_clone+0x61/0xc0 [ 153.210258] br_flood+0x4da/0x710 [ 153.213709] br_dev_xmit+0xeeb/0x1490 [ 153.217524] ? br_poll_controller+0x10/0x10 [ 153.221937] ? __lock_is_held+0xb6/0x140 [ 153.226092] dev_hard_start_xmit+0x1a5/0x980 [ 153.231291] ? check_preemption_disabled+0x48/0x290 [ 153.236306] __dev_queue_xmit+0x2704/0x2fe0 [ 153.240828] ? netdev_pick_tx+0x300/0x300 [ 153.244978] ? ip6_finish_output2+0xae0/0x2550 [ 153.249558] ? find_held_lock+0x35/0x130 [ 153.253700] ? ip6_finish_output2+0xb7f/0x2550 [ 153.258404] ? mark_held_locks+0xb1/0x100 [ 153.262553] dev_queue_xmit+0x18/0x20 [ 153.266356] ? dev_queue_xmit+0x18/0x20 [ 153.270509] neigh_resolve_output+0x5b7/0x980 [ 153.275288] ip6_finish_output2+0xb7f/0x2550 [ 153.279717] ? find_held_lock+0x35/0x130 [ 153.283801] ? ip6_mtu+0x2e6/0x460 [ 153.287338] ? ip6_forward_finish+0x4d0/0x4d0 [ 153.291837] ? lock_downgrade+0x810/0x810 [ 153.295986] ? kasan_check_read+0x11/0x20 [ 153.300155] ip6_finish_output+0x574/0xbe0 [ 153.304384] ? ip6_finish_output+0x574/0xbe0 [ 153.308788] ip6_output+0x235/0x7c0 [ 153.312407] ? ip6_finish_output+0xbe0/0xbe0 [ 153.316824] ? ip6_fragment+0x3770/0x3770 [ 153.321063] ndisc_send_skb+0xf3b/0x1460 [ 153.325130] ? nf_hook.constprop.0+0x560/0x560 [ 153.329708] ? skb_set_owner_w+0x24c/0x360 [ 153.333951] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 153.339323] ndisc_send_ns+0x3a9/0x850 [ 153.343200] ? mark_held_locks+0xb1/0x100 [ 153.347619] ? ndisc_netdev_event+0x470/0x470 [ 153.352282] ? lockdep_hardirqs_on+0x415/0x5d0 [ 153.356853] ? addrconf_dad_work+0xac4/0x1150 [ 153.362389] ? trace_hardirqs_on+0x67/0x220 [ 153.366702] ? addrconf_dad_work+0xac4/0x1150 [ 153.371227] addrconf_dad_work+0xb88/0x1150 [ 153.375631] ? addrconf_dad_completed+0xbb0/0xbb0 [ 153.380633] process_one_work+0x989/0x1750 [ 153.385019] ? pwq_dec_nr_in_flight+0x320/0x320 [ 153.389685] ? lock_acquire+0x16f/0x3f0 [ 153.393673] ? kasan_check_write+0x14/0x20 [ 153.397912] ? do_raw_spin_lock+0xc8/0x240 [ 153.402139] worker_thread+0x98/0xe40 [ 153.405962] kthread+0x354/0x420 [ 153.409419] ? process_one_work+0x1750/0x1750 [ 153.414111] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 153.420077] ret_from_fork+0x24/0x30