[ 39.389994] audit: type=1800 audit(1568170245.771:32): pid=7355 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2450 res=0 Starting mcstransd: [....] 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. [ 40.087069] audit: type=1800 audit(1568170246.571:33): pid=7355 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 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.20' (ECDSA) to the list of known hosts. syzkaller login: [ 49.021599] kauditd_printk_skb: 2 callbacks suppressed [ 49.021614] audit: type=1400 audit(1568170255.511:36): avc: denied { map } for pid=7540 comm="syz-executor747" path="/root/syz-executor747215781" 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 [ 49.051164] IPVS: ftp: loaded support on port[0] = 21 [ 49.106229] chnl_net:caif_netlink_parms(): no params data found [ 49.137474] bridge0: port 1(bridge_slave_0) entered blocking state [ 49.144305] bridge0: port 1(bridge_slave_0) entered disabled state [ 49.151469] device bridge_slave_0 entered promiscuous mode [ 49.158837] bridge0: port 2(bridge_slave_1) entered blocking state [ 49.165315] bridge0: port 2(bridge_slave_1) entered disabled state [ 49.172385] device bridge_slave_1 entered promiscuous mode [ 49.186690] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 49.195992] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 49.212587] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 49.220262] team0: Port device team_slave_0 added [ 49.225660] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 49.233025] team0: Port device team_slave_1 added [ 49.238200] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 49.245620] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 49.300674] device hsr_slave_0 entered promiscuous mode [ 49.368647] device hsr_slave_1 entered promiscuous mode [ 49.439348] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 49.446336] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 49.461940] bridge0: port 2(bridge_slave_1) entered blocking state [ 49.468394] bridge0: port 2(bridge_slave_1) entered forwarding state [ 49.475304] bridge0: port 1(bridge_slave_0) entered blocking state [ 49.481734] bridge0: port 1(bridge_slave_0) entered forwarding state [ 49.510869] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 49.517030] 8021q: adding VLAN 0 to HW filter on device bond0 [ 49.529562] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 49.537929] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 49.557492] bridge0: port 1(bridge_slave_0) entered disabled state [ 49.565132] bridge0: port 2(bridge_slave_1) entered disabled state [ 49.573453] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 49.583638] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 49.589949] 8021q: adding VLAN 0 to HW filter on device team0 [ 49.599358] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 49.607003] bridge0: port 1(bridge_slave_0) entered blocking state [ 49.613405] bridge0: port 1(bridge_slave_0) entered forwarding state [ 49.623795] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 49.631575] bridge0: port 2(bridge_slave_1) entered blocking state [ 49.637908] bridge0: port 2(bridge_slave_1) entered forwarding state [ 49.652481] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 49.660185] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 49.671016] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 49.684692] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 49.695584] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network executing program [ 49.706246] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 49.713742] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 49.721834] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 49.729879] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 49.741636] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 49.752182] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 154.808320] rcu: INFO: rcu_preempt self-detected stall on CPU [ 154.814616] rcu: 0-...!: (10499 ticks this GP) idle=36a/1/0x4000000000000002 softirq=10876/10876 fqs=3 [ 154.824605] rcu: (t=10501 jiffies g=5113 q=5) [ 154.829283] rcu: rcu_preempt kthread starved for 10496 jiffies! g5113 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 154.839675] rcu: RCU grace-period kthread stack dump: [ 154.844857] rcu_preempt R running task 29424 10 2 0x80000000 [ 154.852047] Call Trace: [ 154.854637] __schedule+0x866/0x1dc0 [ 154.858343] ? pci_mmcfg_check_reserved+0x170/0x170 [ 154.863345] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 154.868448] ? lockdep_hardirqs_on+0x415/0x5d0 [ 154.873030] ? trace_hardirqs_on+0x67/0x220 [ 154.877342] schedule+0x92/0x1c0 [ 154.880698] schedule_timeout+0x4db/0xfc0 [ 154.884837] ? usleep_range+0x170/0x170 [ 154.888798] ? trace_hardirqs_on+0x67/0x220 [ 154.893104] ? kasan_check_read+0x11/0x20 [ 154.897242] ? __next_timer_interrupt+0x1a0/0x1a0 [ 154.902206] ? prepare_to_swait_exclusive+0x120/0x120 [ 154.907409] rcu_gp_kthread+0xd5c/0x2190 [ 154.911485] ? rcu_blocking_is_gp+0x90/0x90 [ 154.915799] ? trace_hardirqs_on+0x67/0x220 [ 154.920113] ? kasan_check_read+0x11/0x20 [ 154.924251] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 154.929343] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 154.934867] ? __kthread_parkme+0xfb/0x1b0 [ 154.939100] kthread+0x354/0x420 [ 154.942454] ? rcu_blocking_is_gp+0x90/0x90 [ 154.946761] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 154.952286] ret_from_fork+0x24/0x30 [ 154.956008] NMI backtrace for cpu 0 [ 154.959622] CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 4.19.72 #0 [ 154.965922] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 154.975276] Workqueue: ipv6_addrconf addrconf_dad_work [ 154.980538] Call Trace: [ 154.983106] [ 154.985258] dump_stack+0x172/0x1f0 [ 154.988884] nmi_cpu_backtrace.cold+0x63/0xa4 [ 154.993367] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 154.998292] nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 [ 155.003562] arch_trigger_cpumask_backtrace+0x14/0x20 [ 155.008824] rcu_dump_cpu_stacks+0x189/0x1d5 [ 155.013217] ? wake_up_process+0x10/0x20 [ 155.017270] rcu_check_callbacks.cold+0x5e3/0xd90 [ 155.022102] ? trace_hardirqs_off+0x62/0x220 [ 155.026506] update_process_times+0x32/0x80 [ 155.030817] tick_sched_handle+0xa2/0x190 [ 155.035212] tick_sched_timer+0x47/0x130 [ 155.039272] __hrtimer_run_queues+0x33b/0xdc0 [ 155.043753] ? tick_sched_do_timer+0x1b0/0x1b0 [ 155.048328] ? hrtimer_fixup_activate+0x30/0x30 [ 155.052984] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 155.057985] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 155.063338] hrtimer_interrupt+0x314/0x770 [ 155.067572] smp_apic_timer_interrupt+0x111/0x550 [ 155.072429] apic_timer_interrupt+0xf/0x20 [ 155.076650] RIP: 0010:hhf_dequeue+0x9f/0xa00 [ 155.081046] Code: e8 e6 dd dc fb 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 0f 85 52 07 00 00 49 8b 1e 48 8d 7b 10 48 89 f8 48 c1 e8 03 42 0f b6 04 20 <84> c0 74 08 3c 03 0f 8e 4e 07 00 00 44 8b 7b 10 31 ff 44 89 fe e8 [ 155.099931] RSP: 0018:ffff8880ae806b38 EFLAGS: 00000a06 ORIG_RAX: ffffffffffffff13 [ 155.107634] RAX: 0000000000000000 RBX: ffff8880a07f94b8 RCX: ffffffff858e7e8e [ 155.114895] RDX: 0000000000000100 RSI: ffffffff858e78aa RDI: ffff8880a07f94c8 [ 155.122148] RBP: ffff8880ae806b88 R08: ffff8880aa202140 R09: 000000000000000a [ 155.129402] R10: ffff8880aa202b50 R11: 00000000ed0c0843 R12: dffffc0000000000 [ 155.136668] R13: ffff8880a07f9200 R14: ffff8880a07f9550 R15: ffff8880a07f9550 [ 155.143933] ? apic_timer_interrupt+0xa/0x20 [ 155.148335] ? hhf_dequeue+0x65e/0xa00 [ 155.152208] ? hhf_dequeue+0x7a/0xa00 [ 155.155996] ? hhf_dequeue+0x7a/0xa00 [ 155.159786] __qdisc_run+0x1e7/0x1960 [ 155.163581] __dev_queue_xmit+0x165c/0x2fe0 [ 155.167891] ? deliver_clone+0x61/0xc0 [ 155.171764] ? br_flood+0x5fa/0x710 [ 155.175377] ? br_handle_frame_finish+0xf72/0x1510 [ 155.180297] ? netdev_pick_tx+0x300/0x300 [ 155.184427] ? do_softirq_own_stack+0x2a/0x40 [ 155.188908] ? do_softirq.part.0+0x11a/0x170 [ 155.193308] ? __local_bh_enable_ip+0x211/0x270 [ 155.197964] ? ip6_finish_output2+0xae0/0x2550 [ 155.202530] ? ip6_finish_output+0x574/0xbe0 [ 155.206924] ? ndisc_send_skb+0xf3b/0x1460 [ 155.211148] ? ndisc_send_ns+0x3a9/0x850 [ 155.215195] ? addrconf_dad_work+0xb88/0x1150 [ 155.219677] ? worker_thread+0x98/0xe40 [ 155.223639] ? kthread+0x354/0x420 [ 155.227162] ? ret_from_fork+0x24/0x30 [ 155.231039] ? __lock_is_held+0xb6/0x140 [ 155.235094] dev_queue_xmit+0x18/0x20 [ 155.238881] ? dev_queue_xmit+0x18/0x20 [ 155.242846] br_dev_queue_push_xmit+0x405/0x5d0 [ 155.247512] ? br_nf_dev_queue_xmit+0x38c/0x1610 [ 155.252302] br_nf_dev_queue_xmit+0x365/0x1610 [ 155.256887] br_nf_post_routing+0x76f/0x12f0 [ 155.261383] ? find_inlist_lock.constprop.0+0x22a/0x230 [ 155.266743] ? br_nf_dev_queue_xmit+0x1610/0x1610 [ 155.271606] ? ipv6_skip_exthdr+0x5b0/0x5c0 [ 155.276032] ? br_nf_pre_routing_finish_bridge+0xaa0/0xaa0 [ 155.281650] nf_hook_slow+0xbc/0x1e0 [ 155.285356] br_forward_finish+0x215/0x400 [ 155.289599] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 155.294431] ? br_fdb_add.cold+0x8a/0x8a [ 155.298491] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 155.303494] ? nf_hook_slow+0xf0/0x1e0 [ 155.307383] br_nf_hook_thresh+0x2e9/0x370 [ 155.311634] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 155.316469] ? setup_pre_routing+0x470/0x470 [ 155.320875] ? find_held_lock+0x35/0x130 [ 155.324925] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 155.329759] br_nf_forward_finish+0x356/0x700 [ 155.334240] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 155.339073] br_nf_forward_ip+0x6b4/0x17c0 [ 155.343297] ? br_nf_forward_finish+0x700/0x700 [ 155.347953] ? refcount_inc_not_zero_checked+0x147/0x200 [ 155.353394] ? br_nf_hook_thresh+0x370/0x370 [ 155.357791] nf_hook_slow+0xbc/0x1e0 [ 155.361495] __br_forward+0x393/0xb30 [ 155.365297] ? br_forward_finish+0x400/0x400 [ 155.369695] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 155.374528] deliver_clone+0x61/0xc0 [ 155.378227] br_flood+0x5fa/0x710 [ 155.381672] br_handle_frame_finish+0xf72/0x1510 [ 155.386417] ? br_handle_local_finish+0x20/0x20 [ 155.391076] ? __lock_is_held+0xb6/0x140 [ 155.395140] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 155.400140] ? nf_hook_slow+0xf0/0x1e0 [ 155.404027] br_nf_hook_thresh+0x2e9/0x370 [ 155.408248] ? br_handle_local_finish+0x20/0x20 [ 155.412907] ? setup_pre_routing+0x470/0x470 [ 155.417305] ? br_handle_local_finish+0x20/0x20 [ 155.421963] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 155.427153] br_nf_pre_routing_finish_ipv6+0x6ed/0xd70 [ 155.432414] ? br_handle_local_finish+0x20/0x20 [ 155.437077] ? kasan_check_read+0x11/0x20 [ 155.441233] br_nf_pre_routing_ipv6+0x4a5/0x8ca [ 155.445888] ? br_validate_ipv6+0xb90/0xb90 [ 155.450200] ? br_nf_pre_routing_finish.cold+0x11d/0x11d [ 155.455645] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 155.461165] ? skb_pull_rcsum+0x164/0x340 [ 155.465301] br_nf_pre_routing+0x1016/0x159c [ 155.469696] ? br_nf_pre_routing_finish+0x1960/0x1960 [ 155.474873] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 155.480396] ? ebt_broute+0x127/0x190 [ 155.484192] nf_hook_slow+0xbc/0x1e0 [ 155.487904] br_handle_frame+0x985/0x1480 [ 155.492040] ? br_handle_frame_finish+0x1510/0x1510 [ 155.497042] ? br_handle_local_finish+0x20/0x20 [ 155.501700] ? br_handle_frame_finish+0x1510/0x1510 [ 155.506717] __netif_receive_skb_core+0xac1/0x3570 [ 155.511639] ? __lock_acquire+0x6ee/0x49c0 [ 155.515860] ? native_safe_halt+0xe/0x10 [ 155.519910] ? arch_cpu_idle+0xa/0x10 [ 155.523695] ? default_idle_call+0x36/0x90 [ 155.527919] ? do_idle+0x377/0x560 [ 155.531632] ? start_kernel+0x88c/0x8c5 [ 155.535602] ? netif_receive_skb+0x2d0/0x2d0 [ 155.539998] ? mark_held_locks+0x100/0x100 [ 155.544218] ? lock_downgrade+0x810/0x810 [ 155.548353] ? process_backlog+0x482/0x7a0 [ 155.552581] __netif_receive_skb_one_core+0xa8/0x1a0 [ 155.557672] ? __netif_receive_skb_one_core+0xa8/0x1a0 [ 155.562936] ? __netif_receive_skb_core+0x3570/0x3570 [ 155.568138] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 155.573663] ? check_preemption_disabled+0x48/0x290 [ 155.578665] ? lock_acquire+0x16f/0x3f0 [ 155.582627] __netif_receive_skb+0x2c/0x1d0 [ 155.586936] process_backlog+0x23a/0x7a0 [ 155.591157] ? net_rx_action+0x27b/0x1070 [ 155.595292] ? lockdep_hardirqs_on+0x19b/0x5d0 [ 155.599864] net_rx_action+0x4f5/0x1070 [ 155.603840] ? napi_complete_done+0x500/0x500 [ 155.608320] ? __lock_is_held+0xb6/0x140 [ 155.612374] __do_softirq+0x25c/0x921 [ 155.616159] ? rcu_nmi_exit+0xe4/0x140 [ 155.620041] ? ip6_finish_output2+0xb9f/0x2550 [ 155.624613] do_softirq_own_stack+0x2a/0x40 [ 155.628913] [ 155.631140] do_softirq.part.0+0x11a/0x170 [ 155.635361] __local_bh_enable_ip+0x211/0x270 [ 155.639849] ip6_finish_output2+0xbd2/0x2550 [ 155.644244] ? find_held_lock+0x35/0x130 [ 155.648299] ? ip6_mtu+0x2e6/0x460 [ 155.651842] ? ip6_forward_finish+0x4d0/0x4d0 [ 155.656325] ? lock_downgrade+0x810/0x810 [ 155.660463] ? kasan_check_read+0x11/0x20 [ 155.664603] ip6_finish_output+0x574/0xbe0 [ 155.668823] ? ip6_finish_output+0x574/0xbe0 [ 155.673231] ip6_output+0x235/0x7c0 [ 155.676847] ? ip6_finish_output+0xbe0/0xbe0 [ 155.681247] ? ip6_fragment+0x3770/0x3770 [ 155.685389] ndisc_send_skb+0xf3b/0x1460 [ 155.689440] ? nf_hook.constprop.0+0x560/0x560 [ 155.694035] ? skb_set_owner_w+0x24c/0x360 [ 155.698257] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 155.703262] ndisc_send_ns+0x3a9/0x850 [ 155.707136] ? mark_held_locks+0xb1/0x100 [ 155.711271] ? ndisc_netdev_event+0x470/0x470 [ 155.715751] ? lockdep_hardirqs_on+0x415/0x5d0 [ 155.720318] ? addrconf_dad_work+0xac4/0x1150 [ 155.724798] ? trace_hardirqs_on+0x67/0x220 [ 155.729105] ? addrconf_dad_work+0xac4/0x1150 [ 155.733596] addrconf_dad_work+0xb88/0x1150 [ 155.737909] ? addrconf_dad_completed+0xbb0/0xbb0 [ 155.742741] process_one_work+0x989/0x1750 [ 155.746969] ? pwq_dec_nr_in_flight+0x320/0x320 [ 155.751620] ? lock_acquire+0x16f/0x3f0 [ 155.755581] ? kasan_check_write+0x14/0x20 [ 155.759802] ? do_raw_spin_lock+0xc8/0x240 [ 155.764053] worker_thread+0x98/0xe40 [ 155.767858] kthread+0x354/0x420 [ 155.771214] ? process_one_work+0x1750/0x1750 [ 155.775713] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 155.781245] ret_from_fork+0x24/0x30