[ 36.402566] audit: type=1800 audit(1568543009.584:32): pid=7313 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. [ 37.190032] audit: type=1800 audit(1568543010.464:33): pid=7313 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 '10.128.0.130' (ECDSA) to the list of known hosts. syzkaller login: [ 252.135073] kauditd_printk_skb: 2 callbacks suppressed [ 252.135089] audit: type=1400 audit(1568543225.404:36): avc: denied { map } for pid=7500 comm="syz-executor615" path="/root/syz-executor615891975" 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 [ 252.154093] IPVS: ftp: loaded support on port[0] = 21 [ 252.221802] chnl_net:caif_netlink_parms(): no params data found [ 252.252885] bridge0: port 1(bridge_slave_0) entered blocking state [ 252.259533] bridge0: port 1(bridge_slave_0) entered disabled state [ 252.266593] device bridge_slave_0 entered promiscuous mode [ 252.273520] bridge0: port 2(bridge_slave_1) entered blocking state [ 252.279942] bridge0: port 2(bridge_slave_1) entered disabled state [ 252.286825] device bridge_slave_1 entered promiscuous mode [ 252.301862] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 252.310974] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 252.326279] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 252.333722] team0: Port device team_slave_0 added [ 252.339215] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 252.346374] team0: Port device team_slave_1 added [ 252.351495] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 252.358851] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 252.417672] device hsr_slave_0 entered promiscuous mode [ 252.485513] device hsr_slave_1 entered promiscuous mode [ 252.535895] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 252.542808] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 252.556400] bridge0: port 2(bridge_slave_1) entered blocking state [ 252.562783] bridge0: port 2(bridge_slave_1) entered forwarding state [ 252.569677] bridge0: port 1(bridge_slave_0) entered blocking state [ 252.576079] bridge0: port 1(bridge_slave_0) entered forwarding state [ 252.607319] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 252.613391] 8021q: adding VLAN 0 to HW filter on device bond0 [ 252.621414] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 252.630225] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 252.648655] bridge0: port 1(bridge_slave_0) entered disabled state [ 252.656072] bridge0: port 2(bridge_slave_1) entered disabled state [ 252.663014] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 252.673479] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 252.679812] 8021q: adding VLAN 0 to HW filter on device team0 [ 252.688664] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 252.696357] bridge0: port 1(bridge_slave_0) entered blocking state [ 252.702695] bridge0: port 1(bridge_slave_0) entered forwarding state [ 252.711957] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 252.719923] bridge0: port 2(bridge_slave_1) entered blocking state [ 252.726309] bridge0: port 2(bridge_slave_1) entered forwarding state [ 252.746153] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 252.753866] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 252.762532] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 252.770073] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 252.777951] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 252.787105] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 252.793108] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program executing program executing program [ 252.806300] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 252.817230] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 357.825190] rcu: INFO: rcu_preempt self-detected stall on CPU [ 357.831359] rcu: 1-...!: (10499 ticks this GP) idle=84a/1/0x4000000000000002 softirq=10177/10177 fqs=4 [ 357.841157] rcu: (t=10501 jiffies g=5097 q=141) [ 357.845999] rcu: rcu_preempt kthread starved for 10494 jiffies! g5097 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 357.856376] rcu: RCU grace-period kthread stack dump: [ 357.861549] rcu_preempt R running task 29104 10 2 0x80000000 [ 357.868797] Call Trace: [ 357.871509] __schedule+0x866/0x1dc0 [ 357.875221] ? pci_mmcfg_check_reserved+0x170/0x170 [ 357.880224] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 357.885354] ? lockdep_hardirqs_on+0x415/0x5d0 [ 357.889957] ? trace_hardirqs_on+0x67/0x220 [ 357.894270] schedule+0x92/0x1c0 [ 357.897625] schedule_timeout+0x4db/0xfc0 [ 357.901783] ? usleep_range+0x170/0x170 [ 357.905755] ? trace_hardirqs_on+0x67/0x220 [ 357.910135] ? kasan_check_read+0x11/0x20 [ 357.914313] ? __next_timer_interrupt+0x1a0/0x1a0 [ 357.919173] ? prepare_to_swait_exclusive+0x120/0x120 [ 357.924390] rcu_gp_kthread+0xd5c/0x2190 [ 357.928458] ? rcu_blocking_is_gp+0x90/0x90 [ 357.932770] ? trace_hardirqs_on+0x67/0x220 [ 357.937080] ? kasan_check_read+0x11/0x20 [ 357.941222] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 357.946344] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 357.951897] ? __kthread_parkme+0xfb/0x1b0 [ 357.956122] kthread+0x354/0x420 [ 357.959476] ? rcu_blocking_is_gp+0x90/0x90 [ 357.963789] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 357.969318] ret_from_fork+0x24/0x30 [ 357.973029] NMI backtrace for cpu 1 [ 357.976656] CPU: 1 PID: 19 Comm: kworker/1:0 Not tainted 4.19.72 #0 [ 357.983217] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 357.992637] Workqueue: ipv6_addrconf addrconf_dad_work [ 357.997898] Call Trace: [ 358.000464] [ 358.002649] dump_stack+0x172/0x1f0 [ 358.006267] nmi_cpu_backtrace.cold+0x63/0xa4 [ 358.010770] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 358.015689] nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 [ 358.020964] arch_trigger_cpumask_backtrace+0x14/0x20 [ 358.026144] rcu_dump_cpu_stacks+0x189/0x1d5 [ 358.030581] ? wake_up_process+0x10/0x20 [ 358.034639] rcu_check_callbacks.cold+0x5e3/0xd90 [ 358.039480] ? trace_hardirqs_off+0x62/0x220 [ 358.043912] update_process_times+0x32/0x80 [ 358.048246] tick_sched_handle+0xa2/0x190 [ 358.052400] tick_sched_timer+0x47/0x130 [ 358.056459] __hrtimer_run_queues+0x33b/0xdc0 [ 358.060962] ? tick_sched_do_timer+0x1b0/0x1b0 [ 358.065653] ? hrtimer_fixup_activate+0x30/0x30 [ 358.070329] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 358.075339] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 358.080964] hrtimer_interrupt+0x314/0x770 [ 358.085201] smp_apic_timer_interrupt+0x111/0x550 [ 358.090036] apic_timer_interrupt+0xf/0x20 [ 358.094360] RIP: 0010:hhf_dequeue+0x86/0xa00 [ 358.098762] Code: 00 00 48 8b 75 d0 49 8b 85 40 03 00 00 49 89 f6 48 39 c6 0f 84 71 04 00 00 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 [ 358.117650] RSP: 0018:ffff8880ae906b38 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 358.125349] RAX: 1ffff110152b10fa RBX: ffff8880a9588738 RCX: ffffffff858e7e8e [ 358.132614] RDX: 0000000000000100 RSI: ffffffff858e78aa RDI: ffff8880a9588740 [ 358.139868] RBP: ffff8880ae906b88 R08: ffff8880aa2a8500 R09: 000000000000000a [ 358.147124] R10: ffff8880aa2a8f10 R11: 0000000085a8a4b6 R12: dffffc0000000000 [ 358.154378] R13: ffff8880a9588480 R14: ffff8880a95887d0 R15: ffff8880a95887d0 [ 358.161661] ? apic_timer_interrupt+0xa/0x20 [ 358.166069] ? hhf_dequeue+0x65e/0xa00 [ 358.169944] ? hhf_dequeue+0x7a/0xa00 [ 358.173735] ? hhf_dequeue+0x7a/0xa00 [ 358.177603] __qdisc_run+0x1e7/0x1960 [ 358.181473] __dev_queue_xmit+0x165c/0x2fe0 [ 358.185824] ? deliver_clone+0x61/0xc0 [ 358.189708] ? br_flood+0x5fa/0x710 [ 358.193327] ? br_handle_frame_finish+0xf72/0x1510 [ 358.198263] ? netdev_pick_tx+0x300/0x300 [ 358.202399] ? do_softirq_own_stack+0x2a/0x40 [ 358.206924] ? do_softirq.part.0+0x11a/0x170 [ 358.211319] ? __local_bh_enable_ip+0x211/0x270 [ 358.215999] ? ip6_finish_output2+0xae0/0x2550 [ 358.220569] ? ip6_finish_output+0x574/0xbe0 [ 358.224991] ? ndisc_send_skb+0xf3b/0x1460 [ 358.229211] ? ndisc_send_ns+0x3a9/0x850 [ 358.233258] ? addrconf_dad_work+0xb88/0x1150 [ 358.237740] ? worker_thread+0x98/0xe40 [ 358.241702] ? kthread+0x354/0x420 [ 358.245238] ? ret_from_fork+0x24/0x30 [ 358.249125] ? __lock_is_held+0xb6/0x140 [ 358.253183] dev_queue_xmit+0x18/0x20 [ 358.256970] ? dev_queue_xmit+0x18/0x20 [ 358.260943] br_dev_queue_push_xmit+0x405/0x5d0 [ 358.265638] ? br_nf_dev_queue_xmit+0x38c/0x1610 [ 358.270385] br_nf_dev_queue_xmit+0x365/0x1610 [ 358.274959] br_nf_post_routing+0x76f/0x12f0 [ 358.279360] ? find_inlist_lock.constprop.0+0x22a/0x230 [ 358.284709] ? br_nf_dev_queue_xmit+0x1610/0x1610 [ 358.289573] ? ipv6_skip_exthdr+0x5b0/0x5c0 [ 358.293883] ? br_nf_pre_routing_finish_bridge+0xaa0/0xaa0 [ 358.299527] nf_hook_slow+0xbc/0x1e0 [ 358.303235] br_forward_finish+0x215/0x400 [ 358.307458] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 358.312290] ? br_fdb_add.cold+0x8a/0x8a [ 358.316339] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 358.321348] ? nf_hook_slow+0xf0/0x1e0 [ 358.325230] br_nf_hook_thresh+0x2e9/0x370 [ 358.329454] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 358.334287] ? setup_pre_routing+0x470/0x470 [ 358.338680] ? find_held_lock+0x35/0x130 [ 358.342733] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 358.347573] br_nf_forward_finish+0x356/0x700 [ 358.352055] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 358.356900] br_nf_forward_ip+0x6b4/0x17c0 [ 358.361127] ? br_nf_forward_finish+0x700/0x700 [ 358.365848] ? refcount_inc_not_zero_checked+0x147/0x200 [ 358.371290] ? br_nf_hook_thresh+0x370/0x370 [ 358.375689] nf_hook_slow+0xbc/0x1e0 [ 358.379391] __br_forward+0x393/0xb30 [ 358.383181] ? br_forward_finish+0x400/0x400 [ 358.387579] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 358.392423] deliver_clone+0x61/0xc0 [ 358.396135] br_flood+0x5fa/0x710 [ 358.399579] br_handle_frame_finish+0xf72/0x1510 [ 358.404323] ? br_handle_local_finish+0x20/0x20 [ 358.408986] ? __lock_is_held+0xb6/0x140 [ 358.413034] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 358.418058] ? nf_hook_slow+0xf0/0x1e0 [ 358.421980] br_nf_hook_thresh+0x2e9/0x370 [ 358.426219] ? br_handle_local_finish+0x20/0x20 [ 358.430885] ? setup_pre_routing+0x470/0x470 [ 358.435465] ? br_handle_local_finish+0x20/0x20 [ 358.440134] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 358.445327] br_nf_pre_routing_finish_ipv6+0x6ed/0xd70 [ 358.450587] ? br_handle_local_finish+0x20/0x20 [ 358.455256] ? kasan_check_read+0x11/0x20 [ 358.459395] br_nf_pre_routing_ipv6+0x4a5/0x8ca [ 358.464055] ? br_validate_ipv6+0xb90/0xb90 [ 358.468377] ? br_nf_pre_routing_finish.cold+0x11d/0x11d [ 358.473813] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 358.479407] ? skb_pull_rcsum+0x164/0x340 [ 358.483548] br_nf_pre_routing+0x1016/0x159c [ 358.487950] ? br_nf_pre_routing_finish+0x1960/0x1960 [ 358.493135] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 358.498665] ? ebt_broute+0x127/0x190 [ 358.502459] nf_hook_slow+0xbc/0x1e0 [ 358.506164] br_handle_frame+0x985/0x1480 [ 358.510302] ? br_handle_frame_finish+0x1510/0x1510 [ 358.515308] ? br_handle_local_finish+0x20/0x20 [ 358.519966] ? br_handle_frame_finish+0x1510/0x1510 [ 358.524970] __netif_receive_skb_core+0xac1/0x3570 [ 358.529885] ? __lock_acquire+0x6ee/0x49c0 [ 358.534119] ? default_idle_call+0x36/0x90 [ 358.538397] ? do_idle+0x377/0x560 [ 358.541932] ? cpu_startup_entry+0xc8/0xe0 [ 358.546187] ? start_secondary+0x3e8/0x5b0 [ 358.550417] ? netif_receive_skb+0x2d0/0x2d0 [ 358.554813] ? mark_held_locks+0x100/0x100 [ 358.559045] ? lock_downgrade+0x810/0x810 [ 358.563211] ? process_backlog+0x482/0x7a0 [ 358.567437] __netif_receive_skb_one_core+0xa8/0x1a0 [ 358.572531] ? __netif_receive_skb_one_core+0xa8/0x1a0 [ 358.577807] ? __netif_receive_skb_core+0x3570/0x3570 [ 358.582984] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 358.588549] ? check_preemption_disabled+0x48/0x290 [ 358.593550] ? lock_acquire+0x16f/0x3f0 [ 358.597515] __netif_receive_skb+0x2c/0x1d0 [ 358.601825] process_backlog+0x23a/0x7a0 [ 358.605882] ? net_rx_action+0x27b/0x1070 [ 358.610014] ? lockdep_hardirqs_on+0x19b/0x5d0 [ 358.614597] net_rx_action+0x4f5/0x1070 [ 358.618574] ? napi_complete_done+0x500/0x500 [ 358.623054] ? __lock_is_held+0xb6/0x140 [ 358.627110] __do_softirq+0x25c/0x921 [ 358.630905] ? rcu_nmi_exit+0xe4/0x140 [ 358.634787] ? ip6_finish_output2+0xb9f/0x2550 [ 358.639368] do_softirq_own_stack+0x2a/0x40 [ 358.643671] [ 358.645895] do_softirq.part.0+0x11a/0x170 [ 358.650117] __local_bh_enable_ip+0x211/0x270 [ 358.654600] ip6_finish_output2+0xbd2/0x2550 [ 358.659001] ? find_held_lock+0x35/0x130 [ 358.663048] ? ip6_mtu+0x2e6/0x460 [ 358.666576] ? ip6_forward_finish+0x4d0/0x4d0 [ 358.671055] ? lock_downgrade+0x810/0x810 [ 358.675197] ? kasan_check_read+0x11/0x20 [ 358.679339] ip6_finish_output+0x574/0xbe0 [ 358.683576] ? ip6_finish_output+0x574/0xbe0 [ 358.687976] ip6_output+0x235/0x7c0 [ 358.691593] ? ip6_finish_output+0xbe0/0xbe0 [ 358.695992] ? ip6_fragment+0x3770/0x3770 [ 358.700133] ndisc_send_skb+0xf3b/0x1460 [ 358.704194] ? nf_hook.constprop.0+0x560/0x560 [ 358.708816] ? skb_set_owner_w+0x24c/0x360 [ 358.713042] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 358.718049] ndisc_send_ns+0x3a9/0x850 [ 358.721921] ? mark_held_locks+0xb1/0x100 [ 358.729192] ? ndisc_netdev_event+0x470/0x470 [ 358.733671] ? lockdep_hardirqs_on+0x415/0x5d0 [ 358.738238] ? addrconf_dad_work+0xac4/0x1150 [ 358.742720] ? trace_hardirqs_on+0x67/0x220 [ 358.747035] ? addrconf_dad_work+0xac4/0x1150 [ 358.751521] addrconf_dad_work+0xb88/0x1150 [ 358.755836] ? addrconf_dad_completed+0xbb0/0xbb0 [ 358.760677] process_one_work+0x989/0x1750 [ 358.764901] ? pwq_dec_nr_in_flight+0x320/0x320 [ 358.769559] ? lock_acquire+0x16f/0x3f0 [ 358.773522] ? kasan_check_write+0x14/0x20 [ 358.777740] ? do_raw_spin_lock+0xc8/0x240 [ 358.782226] worker_thread+0x98/0xe40 [ 358.786022] kthread+0x354/0x420 [ 358.789374] ? process_one_work+0x1750/0x1750 [ 358.793868] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 358.799394] ret_from_fork+0x24/0x30