[ 39.430406] audit: type=1800 audit(1567854113.376:32): pid=7423 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 file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok [39;[ 40.074751] audit: type=1800 audit(1567854114.126:33): pid=7423 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 49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.177' (ECDSA) to the list of known hosts. syzkaller login: [ 118.927652] kauditd_printk_skb: 2 callbacks suppressed [ 118.927669] audit: type=1400 audit(1567854192.976:36): avc: denied { map } for pid=7609 comm="syz-executor883" path="/root/syz-executor883836585" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 118.956517] IPVS: ftp: loaded support on port[0] = 21 [ 119.019998] chnl_net:caif_netlink_parms(): no params data found [ 119.052106] bridge0: port 1(bridge_slave_0) entered blocking state [ 119.059075] bridge0: port 1(bridge_slave_0) entered disabled state [ 119.066715] device bridge_slave_0 entered promiscuous mode [ 119.074546] bridge0: port 2(bridge_slave_1) entered blocking state [ 119.080933] bridge0: port 2(bridge_slave_1) entered disabled state [ 119.088118] device bridge_slave_1 entered promiscuous mode [ 119.104173] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 119.113271] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 119.129897] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 119.137772] team0: Port device team_slave_0 added [ 119.143401] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 119.152045] team0: Port device team_slave_1 added [ 119.157570] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 119.164975] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 119.244560] device hsr_slave_0 entered promiscuous mode [ 119.282829] device hsr_slave_1 entered promiscuous mode [ 119.323059] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 119.330208] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 119.345246] bridge0: port 2(bridge_slave_1) entered blocking state [ 119.351684] bridge0: port 2(bridge_slave_1) entered forwarding state [ 119.358791] bridge0: port 1(bridge_slave_0) entered blocking state [ 119.365205] bridge0: port 1(bridge_slave_0) entered forwarding state [ 119.396042] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 119.402153] 8021q: adding VLAN 0 to HW filter on device bond0 [ 119.412013] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 119.421576] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 119.441599] bridge0: port 1(bridge_slave_0) entered disabled state [ 119.449419] bridge0: port 2(bridge_slave_1) entered disabled state [ 119.459121] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 119.469648] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 119.476987] 8021q: adding VLAN 0 to HW filter on device team0 [ 119.486278] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 119.494141] bridge0: port 1(bridge_slave_0) entered blocking state [ 119.500515] bridge0: port 1(bridge_slave_0) entered forwarding state [ 119.509957] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 119.518578] bridge0: port 2(bridge_slave_1) entered blocking state [ 119.525195] bridge0: port 2(bridge_slave_1) entered forwarding state [ 119.540765] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 119.548880] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 119.559100] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 119.569406] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 119.580767] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 119.590405] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready executing program [ 119.597756] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 119.610643] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 119.620884] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 224.712430] rcu: INFO: rcu_preempt self-detected stall on CPU [ 224.718562] rcu: 1-...!: (1 GPs behind) idle=9d2/1/0x4000000000000002 softirq=13304/13305 fqs=28 [ 224.727858] rcu: (t=10500 jiffies g=5221 q=28) [ 224.732619] rcu: rcu_preempt kthread starved for 10444 jiffies! g5221 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 224.742997] rcu: RCU grace-period kthread stack dump: [ 224.748172] rcu_preempt R running task 29424 10 2 0x80000000 [ 224.755379] Call Trace: [ 224.757980] __schedule+0x866/0x1dc0 [ 224.761694] ? pci_mmcfg_check_reserved+0x170/0x170 [ 224.766702] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 224.771796] ? lockdep_hardirqs_on+0x415/0x5d0 [ 224.776370] ? trace_hardirqs_on+0x67/0x220 [ 224.780686] schedule+0x92/0x1c0 [ 224.784053] schedule_timeout+0x4db/0xfc0 [ 224.788193] ? usleep_range+0x170/0x170 [ 224.792155] ? trace_hardirqs_on+0x67/0x220 [ 224.796469] ? kasan_check_read+0x11/0x20 [ 224.800630] ? __next_timer_interrupt+0x1a0/0x1a0 [ 224.805468] ? prepare_to_swait_exclusive+0x120/0x120 [ 224.810750] rcu_gp_kthread+0xd5c/0x2190 [ 224.814820] ? rcu_blocking_is_gp+0x90/0x90 [ 224.819147] ? trace_hardirqs_on+0x67/0x220 [ 224.823461] ? kasan_check_read+0x11/0x20 [ 224.827607] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 224.832895] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 224.838430] ? __kthread_parkme+0xfb/0x1b0 [ 224.842661] kthread+0x354/0x420 [ 224.846021] ? rcu_blocking_is_gp+0x90/0x90 [ 224.850334] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 224.855876] ret_from_fork+0x24/0x30 [ 224.859600] NMI backtrace for cpu 1 [ 224.864205] CPU: 1 PID: 7612 Comm: kworker/1:2 Not tainted 4.19.71 #0 [ 224.870787] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 224.880150] Workqueue: ipv6_addrconf addrconf_dad_work [ 224.885417] Call Trace: [ 224.887988] [ 224.890134] dump_stack+0x172/0x1f0 [ 224.893757] nmi_cpu_backtrace.cold+0x63/0xa4 [ 224.898249] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 224.903359] nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 [ 224.908635] arch_trigger_cpumask_backtrace+0x14/0x20 [ 224.913823] rcu_dump_cpu_stacks+0x189/0x1d5 [ 224.918227] ? wake_up_process+0x10/0x20 [ 224.922289] rcu_check_callbacks.cold+0x5e3/0xd90 [ 224.927126] ? trace_hardirqs_off+0x62/0x220 [ 224.931535] update_process_times+0x32/0x80 [ 224.935852] tick_sched_handle+0xa2/0x190 [ 224.939999] tick_sched_timer+0x47/0x130 [ 224.944055] __hrtimer_run_queues+0x33b/0xdc0 [ 224.948547] ? tick_sched_do_timer+0x1b0/0x1b0 [ 224.953212] ? hrtimer_fixup_activate+0x30/0x30 [ 224.957993] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 224.963300] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 224.968670] hrtimer_interrupt+0x314/0x770 [ 224.972913] smp_apic_timer_interrupt+0x111/0x550 [ 224.977754] apic_timer_interrupt+0xf/0x20 [ 224.981987] [ 224.984241] RIP: 0010:__sanitizer_cov_trace_pc+0x26/0x50 [ 224.989687] Code: 90 90 90 90 55 48 89 e5 48 8b 75 08 65 48 8b 04 25 40 ee 01 00 65 8b 15 28 87 96 7e 81 e2 00 01 1f 00 75 2b 8b 90 d0 12 00 00 <83> fa 02 75 20 48 8b 88 d8 12 00 00 8b 80 d4 12 00 00 48 8b 11 48 [ 225.009819] RSP: 0018:ffff888091fdede8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 225.017536] RAX: ffff888091d6a4c0 RBX: ffff88808d0f94f8 RCX: ffffffff858e8a2e [ 225.024799] RDX: 0000000000000000 RSI: ffffffff858e8a40 RDI: 0000000000000001 [ 225.032058] RBP: ffff888091fdede8 R08: ffff888091d6a4c0 R09: 0000000000000009 [ 225.039319] R10: ffff888091d6aea8 R11: 0000000025ee0a34 R12: dffffc0000000000 [ 225.046593] R13: ffff88808d0f9240 R14: ffff88808d0f9598 R15: ffff88808d0f9590 [ 225.053872] ? hhf_dequeue+0x65e/0xa00 [ 225.058452] ? hhf_dequeue+0x670/0xa00 [ 225.062336] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 225.067865] hhf_dequeue+0x670/0xa00 [ 225.071587] __qdisc_run+0x1e7/0x1960 [ 225.075388] __dev_queue_xmit+0x165c/0x2fe0 [ 225.079716] ? netdev_pick_tx+0x300/0x300 [ 225.083863] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 225.089395] ? br_nf_post_routing+0x780/0x12f0 [ 225.094240] ? br_forward_finish+0x235/0x400 [ 225.098645] ? find_held_lock+0x35/0x130 [ 225.102699] ? br_forward_finish+0x235/0x400 [ 225.107117] dev_queue_xmit+0x18/0x20 [ 225.110921] ? dev_queue_xmit+0x18/0x20 [ 225.114885] br_dev_queue_push_xmit+0x405/0x5d0 [ 225.119551] ? kasan_check_read+0x11/0x20 [ 225.123779] br_forward_finish+0xfa/0x400 [ 225.127920] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 225.132772] ? br_fdb_add.cold+0x8a/0x8a [ 225.136824] ? kasan_check_read+0x11/0x20 [ 225.140967] __br_forward+0x647/0xb30 [ 225.144763] ? br_forward_finish+0x400/0x400 [ 225.149171] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 225.154023] deliver_clone+0x61/0xc0 [ 225.157728] br_flood+0x4da/0x710 [ 225.161179] br_dev_xmit+0xeeb/0x1490 [ 225.164979] ? br_poll_controller+0x10/0x10 [ 225.169298] ? __lock_is_held+0xb6/0x140 [ 225.173362] dev_hard_start_xmit+0x1a5/0x980 [ 225.177766] ? check_preemption_disabled+0x48/0x290 [ 225.182778] __dev_queue_xmit+0x2704/0x2fe0 [ 225.187100] ? netdev_pick_tx+0x300/0x300 [ 225.191291] ? ip6_finish_output2+0xac0/0x2550 [ 225.195881] ? find_held_lock+0x35/0x130 [ 225.199946] ? ip6_finish_output2+0xb7f/0x2550 [ 225.204528] ? mark_held_locks+0xb1/0x100 [ 225.208682] dev_queue_xmit+0x18/0x20 [ 225.212476] ? dev_queue_xmit+0x18/0x20 [ 225.216444] neigh_resolve_output+0x5b7/0x980 [ 225.220935] ip6_finish_output2+0xb7f/0x2550 [ 225.225331] ? find_held_lock+0x35/0x130 [ 225.229383] ? ip6_mtu+0x2e6/0x460 [ 225.232914] ? ip6_forward_finish+0x4d0/0x4d0 [ 225.237398] ? lock_downgrade+0x810/0x810 [ 225.241543] ? kasan_check_read+0x11/0x20 [ 225.245699] ip6_finish_output+0x574/0xbe0 [ 225.249933] ? ip6_finish_output+0x574/0xbe0 [ 225.254339] ip6_output+0x235/0x7c0 [ 225.257960] ? ip6_finish_output+0xbe0/0xbe0 [ 225.262374] ? ip6_fragment+0x3770/0x3770 [ 225.266523] ndisc_send_skb+0xf3b/0x1460 [ 225.270671] ? nf_hook.constprop.0+0x560/0x560 [ 225.275251] ? skb_set_owner_w+0x24c/0x360 [ 225.279483] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 225.284493] ndisc_send_ns+0x3a9/0x850 [ 225.288369] ? mark_held_locks+0xb1/0x100 [ 225.292510] ? ndisc_netdev_event+0x470/0x470 [ 225.296994] ? lockdep_hardirqs_on+0x415/0x5d0 [ 225.301572] ? addrconf_dad_work+0xac4/0x1150 [ 225.306057] ? trace_hardirqs_on+0x67/0x220 [ 225.310370] ? addrconf_dad_work+0xac4/0x1150 [ 225.314869] addrconf_dad_work+0xb88/0x1150 [ 225.319186] ? addrconf_dad_completed+0xbb0/0xbb0 [ 225.324036] process_one_work+0x989/0x1750 [ 225.328270] ? pwq_dec_nr_in_flight+0x320/0x320 [ 225.332933] ? lock_acquire+0x16f/0x3f0 [ 225.336905] ? kasan_check_write+0x14/0x20 [ 225.341133] ? do_raw_spin_lock+0xc8/0x240 [ 225.345366] worker_thread+0x98/0xe40 [ 225.349171] ? trace_hardirqs_on+0x67/0x220 [ 225.353563] kthread+0x354/0x420 [ 225.356960] ? process_one_work+0x1750/0x1750 [ 225.361461] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 225.367000] ret_from_fork+0x24/0x30