[ 38.549792] audit: type=1800 audit(1568052541.700:31): pid=7454 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0 [ 38.571801] audit: type=1800 audit(1568052541.700:32): pid=7454 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 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.14' (ECDSA) to the list of known hosts. syzkaller login: [ 285.435080] kauditd_printk_skb: 3 callbacks suppressed [ 285.435096] audit: type=1400 audit(1568052788.660:36): avc: denied { map } for pid=7641 comm="syz-executor128" path="/root/syz-executor128917015" 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 [ 285.461245] IPVS: ftp: loaded support on port[0] = 21 [ 285.533431] chnl_net:caif_netlink_parms(): no params data found [ 285.568261] bridge0: port 1(bridge_slave_0) entered blocking state [ 285.575140] bridge0: port 1(bridge_slave_0) entered disabled state [ 285.583019] device bridge_slave_0 entered promiscuous mode [ 285.590962] bridge0: port 2(bridge_slave_1) entered blocking state [ 285.597454] bridge0: port 2(bridge_slave_1) entered disabled state [ 285.604514] device bridge_slave_1 entered promiscuous mode [ 285.621237] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 285.630796] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 285.649263] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 285.657096] team0: Port device team_slave_0 added [ 285.662741] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 285.670340] team0: Port device team_slave_1 added [ 285.675822] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 285.683287] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 285.738079] device hsr_slave_0 entered promiscuous mode [ 285.796278] device hsr_slave_1 entered promiscuous mode [ 285.846087] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 285.853421] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 285.868900] bridge0: port 2(bridge_slave_1) entered blocking state [ 285.875354] bridge0: port 2(bridge_slave_1) entered forwarding state [ 285.882739] bridge0: port 1(bridge_slave_0) entered blocking state [ 285.889153] bridge0: port 1(bridge_slave_0) entered forwarding state [ 285.921477] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 285.928964] 8021q: adding VLAN 0 to HW filter on device bond0 [ 285.937977] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 285.948058] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 285.968932] bridge0: port 1(bridge_slave_0) entered disabled state [ 285.977646] bridge0: port 2(bridge_slave_1) entered disabled state [ 285.984887] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 285.997245] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 286.003359] 8021q: adding VLAN 0 to HW filter on device team0 [ 286.012702] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 286.020711] bridge0: port 1(bridge_slave_0) entered blocking state [ 286.027100] bridge0: port 1(bridge_slave_0) entered forwarding state [ 286.036684] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 286.044426] bridge0: port 2(bridge_slave_1) entered blocking state [ 286.050849] bridge0: port 2(bridge_slave_1) entered forwarding state [ 286.064764] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 286.072901] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 286.083365] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 286.094245] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 286.106213] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 286.115489] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready executing program [ 286.122864] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 286.137042] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 286.147166] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 391.265399] rcu: INFO: rcu_preempt self-detected stall on CPU [ 391.271556] rcu: 1-...!: (10499 ticks this GP) idle=996/1/0x4000000000000002 softirq=9575/9575 fqs=27 [ 391.281291] rcu: (t=10501 jiffies g=5505 q=87) [ 391.286051] rcu: rcu_preempt kthread starved for 10448 jiffies! g5505 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 [ 391.297038] rcu: RCU grace-period kthread stack dump: [ 391.302221] rcu_preempt I29104 10 2 0x80000000 [ 391.307919] Call Trace: [ 391.310655] __schedule+0x866/0x1dc0 [ 391.314380] ? pci_mmcfg_check_reserved+0x170/0x170 [ 391.319382] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 391.324538] ? lockdep_hardirqs_on+0x415/0x5d0 [ 391.329153] ? trace_hardirqs_on+0x67/0x220 [ 391.333556] schedule+0x92/0x1c0 [ 391.336915] schedule_timeout+0x4db/0xfc0 [ 391.341071] ? usleep_range+0x170/0x170 [ 391.345039] ? trace_hardirqs_on+0x67/0x220 [ 391.349403] ? kasan_check_read+0x11/0x20 [ 391.353572] ? __next_timer_interrupt+0x1a0/0x1a0 [ 391.358433] ? prepare_to_swait_exclusive+0x120/0x120 [ 391.363647] rcu_gp_kthread+0xd5c/0x2190 [ 391.367714] ? rcu_blocking_is_gp+0x90/0x90 [ 391.372039] ? trace_hardirqs_on+0x67/0x220 [ 391.376352] ? kasan_check_read+0x11/0x20 [ 391.380495] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 391.385711] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 391.391325] ? __kthread_parkme+0xfb/0x1b0 [ 391.395553] kthread+0x354/0x420 [ 391.398914] ? rcu_blocking_is_gp+0x90/0x90 [ 391.403224] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 391.408752] ret_from_fork+0x24/0x30 [ 391.412507] NMI backtrace for cpu 1 [ 391.416132] CPU: 1 PID: 2741 Comm: kworker/1:2 Not tainted 4.19.71 #0 [ 391.422695] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 391.432141] Workqueue: ipv6_addrconf addrconf_dad_work [ 391.437404] Call Trace: [ 391.439973] [ 391.442178] dump_stack+0x172/0x1f0 [ 391.445887] nmi_cpu_backtrace.cold+0x63/0xa4 [ 391.450408] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 391.455354] nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 [ 391.460639] arch_trigger_cpumask_backtrace+0x14/0x20 [ 391.465818] rcu_dump_cpu_stacks+0x189/0x1d5 [ 391.470262] ? wake_up_process+0x10/0x20 [ 391.474602] rcu_check_callbacks.cold+0x5e3/0xd90 [ 391.479438] ? trace_hardirqs_off+0x62/0x220 [ 391.483885] update_process_times+0x32/0x80 [ 391.488225] tick_sched_handle+0xa2/0x190 [ 391.492373] tick_sched_timer+0x47/0x130 [ 391.496438] __hrtimer_run_queues+0x33b/0xdc0 [ 391.500929] ? tick_sched_do_timer+0x1b0/0x1b0 [ 391.505507] ? hrtimer_fixup_activate+0x30/0x30 [ 391.510164] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 391.515694] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 391.521238] hrtimer_interrupt+0x314/0x770 [ 391.525472] smp_apic_timer_interrupt+0x111/0x550 [ 391.530309] apic_timer_interrupt+0xf/0x20 [ 391.534617] [ 391.536917] RIP: 0010:hhf_dequeue+0x58b/0xa00 [ 391.541404] Code: b5 6c 03 00 00 e8 55 dd dc fb 49 8d bd d4 02 00 00 48 89 f8 48 c1 e8 03 42 0f b6 14 20 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 <84> d2 0f 85 32 04 00 00 45 0f af b5 d4 02 00 00 48 89 df 45 01 fe [ 391.560995] RSP: 0018:ffff88809f137448 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 [ 391.568693] RAX: 0000000000000007 RBX: ffff88809b63f078 RCX: ffffffff858e8489 [ 391.575950] RDX: 0000000000000000 RSI: ffffffff858e893b RDI: ffff88809b63f094 [ 391.583219] RBP: ffff88809f137498 R08: ffff88809f10a400 R09: 0000000000000007 [ 391.591185] R10: ffff88809f10ad98 R11: 00000000263eb99a R12: dffffc0000000000 [ 391.598442] R13: ffff88809b63edc0 R14: 0000000000000002 R15: 0000000000000000 [ 391.605798] ? hhf_dequeue+0xb9/0xa00 [ 391.609589] ? hhf_dequeue+0x56b/0xa00 [ 391.613465] ? hhf_dequeue+0x56b/0xa00 [ 391.617419] __qdisc_run+0x1e7/0x1960 [ 391.621277] __dev_queue_xmit+0x165c/0x2fe0 [ 391.625594] ? netdev_pick_tx+0x300/0x300 [ 391.629780] ? ip6_finish_output2+0xac0/0x2550 [ 391.634363] ? find_held_lock+0x35/0x130 [ 391.638413] ? ip6_finish_output2+0xb7f/0x2550 [ 391.642997] ? mark_held_locks+0xb1/0x100 [ 391.647163] dev_queue_xmit+0x18/0x20 [ 391.650972] ? dev_queue_xmit+0x18/0x20 [ 391.655009] neigh_resolve_output+0x5b7/0x980 [ 391.659503] ip6_finish_output2+0xb7f/0x2550 [ 391.663942] ? ip6_mtu+0x2e6/0x460 [ 391.667477] ? ip6_forward_finish+0x4d0/0x4d0 [ 391.671961] ? lock_downgrade+0x810/0x810 [ 391.676102] ? kasan_check_read+0x11/0x20 [ 391.680246] ip6_finish_output+0x574/0xbe0 [ 391.684480] ? ip6_finish_output+0x574/0xbe0 [ 391.688882] ip6_output+0x235/0x7c0 [ 391.692506] ? ip6_finish_output+0xbe0/0xbe0 [ 391.696923] ? ip6_fragment+0x3770/0x3770 [ 391.701067] ndisc_send_skb+0xf3b/0x1460 [ 391.705298] ? nf_hook.constprop.0+0x560/0x560 [ 391.709966] ? skb_set_owner_w+0x24c/0x360 [ 391.714197] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 391.719219] ndisc_send_ns+0x3a9/0x850 [ 391.723101] ? mark_held_locks+0xb1/0x100 [ 391.727253] ? ndisc_netdev_event+0x470/0x470 [ 391.731745] ? lockdep_hardirqs_on+0x415/0x5d0 [ 391.736325] ? addrconf_dad_work+0xac4/0x1150 [ 391.740815] ? trace_hardirqs_on+0x67/0x220 [ 391.745226] ? addrconf_dad_work+0xac4/0x1150 [ 391.749977] addrconf_dad_work+0xb88/0x1150 [ 391.754312] ? addrconf_dad_completed+0xbb0/0xbb0 [ 391.759162] process_one_work+0x989/0x1750 [ 391.764381] ? pwq_dec_nr_in_flight+0x320/0x320 [ 391.769050] ? lock_acquire+0x16f/0x3f0 [ 391.773138] ? kasan_check_write+0x14/0x20 [ 391.777369] ? do_raw_spin_lock+0xc8/0x240 [ 391.781608] worker_thread+0x98/0xe40 [ 391.785430] ? trace_hardirqs_on+0x67/0x220 [ 391.789749] kthread+0x354/0x420 [ 391.793193] ? process_one_work+0x1750/0x1750 [ 391.797682] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 391.803299] ret_from_fork+0x24/0x30