[ 68.877256][ T26] audit: type=1800 audit(1568245357.300:31): pid=10163 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=2436 res=0 [ 68.899261][ T26] audit: type=1800 audit(1568245357.300:32): pid=10163 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=2417 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. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.225' (ECDSA) to the list of known hosts. syzkaller login: [ 76.642663][ T26] kauditd_printk_skb: 3 callbacks suppressed [ 76.642677][ T26] audit: type=1400 audit(1568245365.130:36): avc: denied { map } for pid=10351 comm="syz-executor750" path="/root/syz-executor750159920" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 76.680119][T10352] IPVS: ftp: loaded support on port[0] = 21 [ 76.722897][T10352] chnl_net:caif_netlink_parms(): no params data found [ 76.744266][T10352] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.751581][T10352] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.759036][T10352] device bridge_slave_0 entered promiscuous mode [ 76.766303][T10352] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.773420][T10352] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.780933][T10352] device bridge_slave_1 entered promiscuous mode [ 76.794652][T10352] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 76.805003][T10352] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 76.821280][T10352] team0: Port device team_slave_0 added [ 76.827817][T10352] team0: Port device team_slave_1 added [ 76.910914][T10352] device hsr_slave_0 entered promiscuous mode [ 76.979819][T10352] device hsr_slave_1 entered promiscuous mode [ 77.044811][T10352] bridge0: port 2(bridge_slave_1) entered blocking state [ 77.051894][T10352] bridge0: port 2(bridge_slave_1) entered forwarding state [ 77.059139][T10352] bridge0: port 1(bridge_slave_0) entered blocking state [ 77.066190][T10352] bridge0: port 1(bridge_slave_0) entered forwarding state [ 77.090721][T10352] 8021q: adding VLAN 0 to HW filter on device bond0 [ 77.102520][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 77.110813][ T17] bridge0: port 1(bridge_slave_0) entered disabled state [ 77.118229][ T17] bridge0: port 2(bridge_slave_1) entered disabled state [ 77.126042][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 77.135613][T10352] 8021q: adding VLAN 0 to HW filter on device team0 [ 77.144636][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 77.153079][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 77.160134][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 77.180000][T10354] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 77.188258][T10354] bridge0: port 2(bridge_slave_1) entered blocking state [ 77.195314][T10354] bridge0: port 2(bridge_slave_1) entered forwarding state [ 77.203186][T10354] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 77.211986][T10354] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 77.220253][T10354] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 77.228241][T10354] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 77.237269][T10352] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 77.245058][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 77.259487][T10352] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 182.479281][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 182.485917][ C1] rcu: 1-...!: (1 GPs behind) idle=926/1/0x4000000000000002 softirq=11216/11217 fqs=23 [ 182.495694][ C1] (t=10500 jiffies g=10125 q=33) [ 182.500705][ C1] rcu: rcu_preempt kthread starved for 10454 jiffies! g10125 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 [ 182.512047][ C1] rcu: RCU grace-period kthread stack dump: [ 182.517911][ C1] rcu_preempt I29520 10 2 0x80004000 [ 182.524222][ C1] Call Trace: [ 182.527506][ C1] __schedule+0x755/0x1580 [ 182.531912][ C1] ? __sched_text_start+0x8/0x8 [ 182.536753][ C1] schedule+0xd9/0x260 [ 182.540803][ C1] schedule_timeout+0x486/0xc50 [ 182.545630][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 182.550544][ C1] ? usleep_range+0x170/0x170 [ 182.555205][ C1] ? trace_hardirqs_on+0x67/0x240 [ 182.560209][ C1] ? __kasan_check_read+0x11/0x20 [ 182.565212][ C1] ? __next_timer_interrupt+0x1a0/0x1a0 [ 182.570737][ C1] ? swake_up_one+0x60/0x60 [ 182.575223][ C1] rcu_gp_kthread+0x9b2/0x18c0 [ 182.579978][ C1] ? rcu_barrier+0x310/0x310 [ 182.584565][ C1] ? trace_hardirqs_on+0x67/0x240 [ 182.589700][ C1] ? __kasan_check_read+0x11/0x20 [ 182.594717][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 182.600945][ C1] ? __kthread_parkme+0x108/0x1c0 [ 182.605944][ C1] ? __kasan_check_read+0x11/0x20 [ 182.610950][ C1] kthread+0x361/0x430 [ 182.615004][ C1] ? rcu_barrier+0x310/0x310 [ 182.619580][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 182.625891][ C1] ret_from_fork+0x24/0x30 [ 182.630321][ C1] NMI backtrace for cpu 1 [ 182.634635][ C1] CPU: 1 PID: 3516 Comm: kworker/1:2 Not tainted 5.3.0-rc8+ #0 [ 182.642150][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 182.652216][ C1] Workqueue: ipv6_addrconf addrconf_dad_work [ 182.658185][ C1] Call Trace: [ 182.661449][ C1] [ 182.664295][ C1] dump_stack+0x172/0x1f0 [ 182.668634][ C1] nmi_cpu_backtrace.cold+0x70/0xb2 [ 182.673924][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 182.680158][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 182.685774][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 182.691737][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 182.698222][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 182.703317][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 182.708841][ C1] ? raise_softirq+0x138/0x340 [ 182.713585][ C1] update_process_times+0x32/0x80 [ 182.718597][ C1] tick_sched_handle+0xa2/0x190 [ 182.723425][ C1] tick_sched_timer+0x53/0x140 [ 182.728169][ C1] __hrtimer_run_queues+0x364/0xe40 [ 182.733347][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 182.738622][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 182.744155][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 182.749868][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 182.755914][ C1] hrtimer_interrupt+0x314/0x770 [ 182.760837][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 182.766359][ C1] apic_timer_interrupt+0xf/0x20 [ 182.771268][ C1] [ 182.774192][ C1] RIP: 0010:hhf_dequeue+0x679/0xa20 [ 182.779369][ C1] Code: 20 00 0f 85 5b 03 00 00 4d 8b bd 98 03 00 00 48 89 df 48 8b 55 c8 4c 89 fe e8 b3 d9 77 fd 31 ff 89 c6 88 45 b0 e8 37 15 ac fb <0f> b6 75 b0 40 84 f6 0f 84 c6 f9 ff ff e8 e5 13 ac fb 4c 89 f0 48 [ 182.798963][ C1] RSP: 0018:ffff88809c57f3f8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 [ 182.807384][ C1] RAX: 0000000000000000 RBX: ffff88808cfb4bf8 RCX: ffffffff85c660f9 [ 182.815343][ C1] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000001 [ 182.823294][ C1] RBP: ffff88809c57f448 R08: ffff88809c59c200 R09: 0000000000000000 [ 182.831242][ C1] R10: fffffbfff134afaf R11: ffff88809c59c200 R12: dffffc0000000000 [ 182.839206][ C1] R13: ffff88808cfb4900 R14: ffff88808cfb4c98 R15: ffff88808cfb4c90 [ 182.847185][ C1] ? hhf_dequeue+0x679/0xa20 [ 182.851758][ C1] ? hhf_dequeue+0x679/0xa20 [ 182.856342][ C1] __qdisc_run+0x1e7/0x19d0 [ 182.860837][ C1] ? dev_queue_xmit+0x18/0x20 [ 182.865498][ C1] __dev_queue_xmit+0x16f1/0x3650 [ 182.870502][ C1] ? ndisc_constructor+0x1a5/0xb40 [ 182.875595][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 182.880859][ C1] ? ip6_finish_output2+0x1034/0x2520 [ 182.886210][ C1] ? __kasan_check_read+0x11/0x20 [ 182.891217][ C1] ? lock_downgrade+0x920/0x920 [ 182.896050][ C1] dev_queue_xmit+0x18/0x20 [ 182.900530][ C1] ? dev_queue_xmit+0x18/0x20 [ 182.905196][ C1] neigh_resolve_output+0x5a5/0x970 [ 182.910385][ C1] ip6_finish_output2+0x1034/0x2520 [ 182.915570][ C1] ? ip6_forward_finish+0x530/0x530 [ 182.920755][ C1] ? lock_downgrade+0x920/0x920 [ 182.925589][ C1] ? ip6_mtu+0x16f/0x460 [ 182.929815][ C1] __ip6_finish_output+0x444/0xa50 [ 182.934903][ C1] ? __ip6_finish_output+0x444/0xa50 [ 182.940167][ C1] ip6_finish_output+0x38/0x1f0 [ 182.944998][ C1] ip6_output+0x235/0x7c0 [ 182.949307][ C1] ? ip6_finish_output+0x1f0/0x1f0 [ 182.954409][ C1] ? __ip6_finish_output+0xa50/0xa50 [ 182.959684][ C1] ? ndisc_send_skb+0x803/0x1450 [ 182.964603][ C1] ndisc_send_skb+0xf29/0x1450 [ 182.969350][ C1] ? nf_hook.constprop.0+0x560/0x560 [ 182.974615][ C1] ? skb_set_owner_w+0x21b/0x320 [ 182.979554][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 182.985257][ C1] ndisc_send_ns+0x3a9/0x850 [ 182.989834][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 182.996072][ C1] ? ndisc_netdev_event+0x4e0/0x4e0 [ 183.001251][ C1] ? addrconf_dad_work+0xac4/0x1150 [ 183.006526][ C1] ? trace_hardirqs_on+0x67/0x240 [ 183.011530][ C1] ? addrconf_dad_work+0xac4/0x1150 [ 183.016743][ C1] addrconf_dad_work+0xb88/0x1150 [ 183.021748][ C1] ? addrconf_dad_completed+0xbb0/0xbb0 [ 183.027293][ C1] ? lock_acquire+0x190/0x410 [ 183.031962][ C1] ? trace_hardirqs_on+0x67/0x240 [ 183.036989][ C1] process_one_work+0x9af/0x1740 [ 183.041913][ C1] ? pwq_dec_nr_in_flight+0x320/0x320 [ 183.047273][ C1] ? lock_acquire+0x190/0x410 [ 183.051933][ C1] worker_thread+0x98/0xe40 [ 183.056414][ C1] ? trace_hardirqs_on+0x67/0x240 [ 183.061427][ C1] kthread+0x361/0x430 [ 183.065476][ C1] ? process_one_work+0x1740/0x1740 [ 183.070657][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 183.076876][ C1] ret_from_fork+0x24/0x30