[ 40.187902] audit: type=1800 audit(1568830270.717:32): pid=7471 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. [ 40.967723] audit: type=1800 audit(1568830271.597:33): pid=7471 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 '10.128.0.244' (ECDSA) to the list of known hosts. syzkaller login: [ 200.859816] kauditd_printk_skb: 2 callbacks suppressed [ 200.859830] audit: type=1400 audit(1568830431.487:36): avc: denied { map } for pid=7658 comm="syz-executor373" path="/root/syz-executor373072215" 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 [ 200.879588] IPVS: ftp: loaded support on port[0] = 21 [ 200.946168] chnl_net:caif_netlink_parms(): no params data found [ 200.979399] bridge0: port 1(bridge_slave_0) entered blocking state [ 200.986205] bridge0: port 1(bridge_slave_0) entered disabled state [ 200.993884] device bridge_slave_0 entered promiscuous mode [ 201.001429] bridge0: port 2(bridge_slave_1) entered blocking state [ 201.008074] bridge0: port 2(bridge_slave_1) entered disabled state [ 201.015171] device bridge_slave_1 entered promiscuous mode [ 201.031368] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 201.040674] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 201.056286] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 201.064213] team0: Port device team_slave_0 added [ 201.070118] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 201.077683] team0: Port device team_slave_1 added [ 201.082918] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 201.090365] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 201.158809] device hsr_slave_0 entered promiscuous mode [ 201.196928] device hsr_slave_1 entered promiscuous mode [ 201.237155] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 201.244258] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 201.258303] bridge0: port 2(bridge_slave_1) entered blocking state [ 201.264952] bridge0: port 2(bridge_slave_1) entered forwarding state [ 201.271949] bridge0: port 1(bridge_slave_0) entered blocking state [ 201.278386] bridge0: port 1(bridge_slave_0) entered forwarding state [ 201.310040] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 201.316139] 8021q: adding VLAN 0 to HW filter on device bond0 [ 201.324791] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 201.333969] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 201.353623] bridge0: port 1(bridge_slave_0) entered disabled state [ 201.361369] bridge0: port 2(bridge_slave_1) entered disabled state [ 201.369774] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 201.379805] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 201.386021] 8021q: adding VLAN 0 to HW filter on device team0 [ 201.395853] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 201.403755] bridge0: port 1(bridge_slave_0) entered blocking state [ 201.410302] bridge0: port 1(bridge_slave_0) entered forwarding state [ 201.428389] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 201.436394] bridge0: port 2(bridge_slave_1) entered blocking state [ 201.443240] bridge0: port 2(bridge_slave_1) entered forwarding state [ 201.451117] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 201.459339] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 201.467331] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 201.477621] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 201.489062] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 201.501006] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready executing program [ 201.507149] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 201.514249] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 201.527825] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 201.538054] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 306.586594] rcu: INFO: rcu_preempt self-detected stall on CPU [ 306.592797] rcu: 1-...!: (10499 ticks this GP) idle=166/1/0x4000000000000002 softirq=11220/11220 fqs=27 [ 306.602703] rcu: (t=10500 jiffies g=5349 q=13) [ 306.607462] rcu: rcu_preempt kthread starved for 10446 jiffies! g5349 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 [ 306.618121] rcu: RCU grace-period kthread stack dump: [ 306.623295] rcu_preempt I29424 10 2 0x80000000 [ 306.628928] Call Trace: [ 306.631601] __schedule+0x866/0x1dc0 [ 306.635314] ? pci_mmcfg_check_reserved+0x170/0x170 [ 306.640337] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 306.645491] ? lockdep_hardirqs_on+0x415/0x5d0 [ 306.650106] ? trace_hardirqs_on+0x67/0x220 [ 306.654434] schedule+0x92/0x1c0 [ 306.657794] schedule_timeout+0x4db/0xfc0 [ 306.661931] ? usleep_range+0x170/0x170 [ 306.665895] ? trace_hardirqs_on+0x67/0x220 [ 306.670252] ? kasan_check_read+0x11/0x20 [ 306.674473] ? __next_timer_interrupt+0x1a0/0x1a0 [ 306.679353] ? prepare_to_swait_exclusive+0x120/0x120 [ 306.684579] rcu_gp_kthread+0xd5c/0x2190 [ 306.688649] ? rcu_blocking_is_gp+0x90/0x90 [ 306.692971] ? trace_hardirqs_on+0x67/0x220 [ 306.697282] ? kasan_check_read+0x11/0x20 [ 306.701423] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 306.706577] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 306.712145] ? __kthread_parkme+0xfb/0x1b0 [ 306.716411] kthread+0x354/0x420 [ 306.719774] ? rcu_blocking_is_gp+0x90/0x90 [ 306.724097] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 306.729626] ret_from_fork+0x24/0x30 [ 306.733375] NMI backtrace for cpu 1 [ 306.736994] CPU: 1 PID: 7661 Comm: kworker/1:2 Not tainted 4.19.73 #0 [ 306.743556] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 306.752978] Workqueue: ipv6_addrconf addrconf_dad_work [ 306.758262] Call Trace: [ 306.760842] [ 306.762998] dump_stack+0x172/0x1f0 [ 306.766631] nmi_cpu_backtrace.cold+0x63/0xa4 [ 306.771150] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 306.776309] nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 [ 306.781582] arch_trigger_cpumask_backtrace+0x14/0x20 [ 306.786769] rcu_dump_cpu_stacks+0x189/0x1d5 [ 306.791202] ? wake_up_process+0x10/0x20 [ 306.795258] rcu_check_callbacks.cold+0x5e3/0xd90 [ 306.800108] ? trace_hardirqs_off+0x62/0x220 [ 306.804532] update_process_times+0x32/0x80 [ 306.808891] tick_sched_handle+0xa2/0x190 [ 306.813031] tick_sched_timer+0x47/0x130 [ 306.817086] __hrtimer_run_queues+0x33b/0xdc0 [ 306.821574] ? tick_sched_do_timer+0x1b0/0x1b0 [ 306.826152] ? hrtimer_fixup_activate+0x30/0x30 [ 306.830812] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 306.835817] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 306.841182] hrtimer_interrupt+0x314/0x770 [ 306.845439] smp_apic_timer_interrupt+0x111/0x550 [ 306.850274] apic_timer_interrupt+0xf/0x20 [ 306.856054] [ 306.858379] RIP: 0010:hhf_dequeue+0x670/0xa00 [ 306.862884] Code: 48 8b 55 c8 4c 89 fe e8 ee 23 97 fd 31 ff 89 c6 88 45 b0 e8 52 a5 dc fb 0f b6 75 b0 40 84 f6 0f 84 e1 f9 ff ff e8 00 a4 dc fb <4c> 89 f0 48 c1 e8 03 42 80 3c 20 00 0f 85 fb 02 00 00 48 89 d8 49 [ 306.881779] RSP: 0018:ffff8880a8126df8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 [ 306.889480] RAX: ffff8880a5772580 RBX: ffff8880a84c5938 RCX: ffffffff858ebe8e [ 306.896741] RDX: 0000000000000000 RSI: ffffffff858ebea0 RDI: 0000000000000001 [ 306.904019] RBP: ffff8880a8126e48 R08: ffff8880a5772580 R09: 0000000000000009 [ 306.911297] R10: ffff8880a5772f68 R11: 0000000086b36aec R12: dffffc0000000000 [ 306.918577] R13: ffff8880a84c5680 R14: ffff8880a84c59d8 R15: ffff8880a84c59d0 [ 306.925876] ? hhf_dequeue+0x65e/0xa00 [ 306.929773] ? hhf_dequeue+0x670/0xa00 [ 306.933671] ? hhf_dequeue+0x670/0xa00 [ 306.937622] __qdisc_run+0x1e7/0x1960 [ 306.941502] __dev_queue_xmit+0x165c/0x2fe0 [ 306.945837] ? netdev_pick_tx+0x300/0x300 [ 306.949982] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 306.955584] ? br_nf_post_routing+0x780/0x12f0 [ 306.960229] ? br_forward_finish+0x235/0x400 [ 306.964653] ? find_held_lock+0x35/0x130 [ 306.968709] ? br_forward_finish+0x235/0x400 [ 306.973114] dev_queue_xmit+0x18/0x20 [ 306.976910] ? dev_queue_xmit+0x18/0x20 [ 306.980879] br_dev_queue_push_xmit+0x405/0x5d0 [ 306.985540] ? kasan_check_read+0x11/0x20 [ 306.989839] br_forward_finish+0xfa/0x400 [ 306.993994] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 306.998836] ? br_fdb_add.cold+0x8a/0x8a [ 307.002901] ? kasan_check_read+0x11/0x20 [ 307.007043] __br_forward+0x647/0xb30 [ 307.010858] ? br_forward_finish+0x400/0x400 [ 307.015263] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 307.020105] deliver_clone+0x61/0xc0 [ 307.023811] br_flood+0x4da/0x710 [ 307.027278] br_dev_xmit+0xeeb/0x1490 [ 307.031075] ? br_poll_controller+0x10/0x10 [ 307.035533] ? __lock_is_held+0xb6/0x140 [ 307.039608] dev_hard_start_xmit+0x1a5/0x980 [ 307.044118] ? check_preemption_disabled+0x48/0x290 [ 307.049139] __dev_queue_xmit+0x2704/0x2fe0 [ 307.053461] ? netdev_pick_tx+0x300/0x300 [ 307.057658] ? ip6_finish_output2+0xae0/0x2550 [ 307.062238] ? find_held_lock+0x35/0x130 [ 307.066292] ? ip6_finish_output2+0xb7f/0x2550 [ 307.070884] ? mark_held_locks+0xb1/0x100 [ 307.075740] dev_queue_xmit+0x18/0x20 [ 307.079532] ? dev_queue_xmit+0x18/0x20 [ 307.083534] neigh_resolve_output+0x5b7/0x980 [ 307.088046] ip6_finish_output2+0xb7f/0x2550 [ 307.092449] ? find_held_lock+0x35/0x130 [ 307.096504] ? ip6_mtu+0x2e6/0x460 [ 307.100079] ? ip6_forward_finish+0x4d0/0x4d0 [ 307.104605] ? lock_downgrade+0x810/0x810 [ 307.108774] ? kasan_check_read+0x11/0x20 [ 307.112918] ip6_finish_output+0x574/0xbe0 [ 307.117146] ? ip6_finish_output+0x574/0xbe0 [ 307.121550] ip6_output+0x235/0x7c0 [ 307.125267] ? ip6_finish_output+0xbe0/0xbe0 [ 307.129680] ? ip6_fragment+0x3770/0x3770 [ 307.133891] ndisc_send_skb+0xf3b/0x1460 [ 307.137965] ? nf_hook.constprop.0+0x560/0x560 [ 307.142582] ? skb_set_owner_w+0x24c/0x360 [ 307.146813] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 307.151834] ndisc_send_ns+0x3a9/0x850 [ 307.155726] ? mark_held_locks+0xb1/0x100 [ 307.159870] ? ndisc_netdev_event+0x470/0x470 [ 307.164372] ? lockdep_hardirqs_on+0x415/0x5d0 [ 307.168972] ? addrconf_dad_work+0xac4/0x1150 [ 307.173470] ? trace_hardirqs_on+0x67/0x220 [ 307.177801] ? addrconf_dad_work+0xac4/0x1150 [ 307.182305] addrconf_dad_work+0xb88/0x1150 [ 307.186623] ? addrconf_dad_completed+0xbb0/0xbb0 [ 307.191467] process_one_work+0x989/0x1750 [ 307.195747] ? pwq_dec_nr_in_flight+0x320/0x320 [ 307.200415] ? lock_acquire+0x16f/0x3f0 [ 307.204392] ? kasan_check_write+0x14/0x20 [ 307.208631] ? do_raw_spin_lock+0xc8/0x240 [ 307.212858] worker_thread+0x98/0xe40 [ 307.216665] ? trace_hardirqs_on+0x67/0x220 [ 307.220989] kthread+0x354/0x420 [ 307.224342] ? process_one_work+0x1750/0x1750 [ 307.229015] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 307.234552] ret_from_fork+0x24/0x30