[ 40.961249] audit: type=1800 audit(1568549718.463:32): pid=7567 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 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 syzkaller login: [ 46.044558] kauditd_printk_skb: 2 callbacks suppressed [ 46.044573] audit: type=1400 audit(1568549723.633:35): avc: denied { map } for pid=7741 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.78' (ECDSA) to the list of known hosts. [ 83.767108] audit: type=1400 audit(1568549761.353:36): avc: denied { map } for pid=7753 comm="syz-executor815" path="/root/syz-executor815871803" 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 [ 83.794311] IPVS: ftp: loaded support on port[0] = 21 [ 83.851431] chnl_net:caif_netlink_parms(): no params data found [ 83.887701] bridge0: port 1(bridge_slave_0) entered blocking state [ 83.895262] bridge0: port 1(bridge_slave_0) entered disabled state [ 83.902657] device bridge_slave_0 entered promiscuous mode [ 83.911077] bridge0: port 2(bridge_slave_1) entered blocking state [ 83.917522] bridge0: port 2(bridge_slave_1) entered disabled state [ 83.924754] device bridge_slave_1 entered promiscuous mode [ 83.941440] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 83.950515] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 83.967927] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 83.976361] team0: Port device team_slave_0 added [ 83.982352] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 83.989554] team0: Port device team_slave_1 added [ 83.995423] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 84.003186] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 84.062807] device hsr_slave_0 entered promiscuous mode [ 84.100106] device hsr_slave_1 entered promiscuous mode [ 84.170319] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 84.177541] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 84.193556] bridge0: port 2(bridge_slave_1) entered blocking state [ 84.200274] bridge0: port 2(bridge_slave_1) entered forwarding state [ 84.207236] bridge0: port 1(bridge_slave_0) entered blocking state [ 84.213894] bridge0: port 1(bridge_slave_0) entered forwarding state [ 84.246524] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 84.254257] 8021q: adding VLAN 0 to HW filter on device bond0 [ 84.263220] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 84.272632] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 84.293069] bridge0: port 1(bridge_slave_0) entered disabled state [ 84.301214] bridge0: port 2(bridge_slave_1) entered disabled state [ 84.308426] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 84.320104] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 84.326509] 8021q: adding VLAN 0 to HW filter on device team0 [ 84.337049] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 84.345651] bridge0: port 1(bridge_slave_0) entered blocking state [ 84.352249] bridge0: port 1(bridge_slave_0) entered forwarding state [ 84.362841] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 84.372286] bridge0: port 2(bridge_slave_1) entered blocking state [ 84.378864] bridge0: port 2(bridge_slave_1) entered forwarding state [ 84.401090] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 84.409031] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 84.417298] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 84.425162] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 84.435265] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 84.445302] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready executing program [ 84.452263] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 84.466806] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 84.479155] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 189.539664] rcu: INFO: rcu_preempt self-detected stall on CPU [ 189.545870] rcu: 0-...!: (1 GPs behind) idle=76a/1/0x4000000000000002 softirq=10740/10741 fqs=41 [ 189.555193] rcu: (t=10501 jiffies g=5505 q=16) [ 189.559974] rcu: rcu_preempt kthread starved for 10420 jiffies! g5505 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 189.570542] rcu: RCU grace-period kthread stack dump: [ 189.575725] rcu_preempt I29104 10 2 0x80000000 [ 189.581369] Call Trace: [ 189.584068] __schedule+0x866/0x1dc0 [ 189.587794] ? pci_mmcfg_check_reserved+0x170/0x170 [ 189.592816] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 189.597915] ? lockdep_hardirqs_on+0x415/0x5d0 [ 189.602512] ? trace_hardirqs_on+0x67/0x220 [ 189.606967] schedule+0x92/0x1c0 [ 189.610404] schedule_timeout+0x4db/0xfc0 [ 189.615444] ? usleep_range+0x170/0x170 [ 189.622713] ? trace_hardirqs_on+0x67/0x220 [ 189.627023] ? kasan_check_read+0x11/0x20 [ 189.631173] ? __next_timer_interrupt+0x1a0/0x1a0 [ 189.636182] ? prepare_to_swait_exclusive+0x120/0x120 [ 189.641384] rcu_gp_kthread+0xd5c/0x2190 [ 189.645476] ? rcu_blocking_is_gp+0x90/0x90 [ 189.650329] ? trace_hardirqs_on+0x67/0x220 [ 189.654657] ? kasan_check_read+0x11/0x20 [ 189.658819] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 189.664103] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 189.670077] ? __kthread_parkme+0xfb/0x1b0 [ 189.674305] kthread+0x354/0x420 [ 189.677670] ? rcu_blocking_is_gp+0x90/0x90 [ 189.682080] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 189.687611] ret_from_fork+0x24/0x30 [ 189.691545] NMI backtrace for cpu 0 [ 189.695172] CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.19.72 #0 [ 189.701576] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 189.711011] Call Trace: [ 189.713583] [ 189.715730] dump_stack+0x172/0x1f0 [ 189.719378] nmi_cpu_backtrace.cold+0x63/0xa4 [ 189.723866] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 189.728786] nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 [ 189.734056] arch_trigger_cpumask_backtrace+0x14/0x20 [ 189.739247] rcu_dump_cpu_stacks+0x189/0x1d5 [ 189.743650] ? wake_up_process+0x10/0x20 [ 189.747718] rcu_check_callbacks.cold+0x5e3/0xd90 [ 189.752690] ? trace_hardirqs_off+0x62/0x220 [ 189.757454] update_process_times+0x32/0x80 [ 189.761859] tick_sched_handle+0xa2/0x190 [ 189.766185] tick_sched_timer+0x47/0x130 [ 189.770514] __hrtimer_run_queues+0x33b/0xdc0 [ 189.775535] ? tick_sched_do_timer+0x1b0/0x1b0 [ 189.780119] ? hrtimer_fixup_activate+0x30/0x30 [ 189.784936] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 189.790015] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 189.795690] hrtimer_interrupt+0x314/0x770 [ 189.799951] smp_apic_timer_interrupt+0x111/0x550 [ 189.804799] apic_timer_interrupt+0xf/0x20 [ 189.809115] [ 189.811439] RIP: 0010:write_comp_data+0x0/0x70 [ 189.816028] Code: 83 fa 02 75 20 48 8b 88 d8 12 00 00 8b 80 d4 12 00 00 48 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 5d c3 0f 1f 00 <65> 4c 8b 04 25 40 ee 01 00 65 8b 05 e0 96 96 7e a9 00 01 1f 00 75 [ 189.835015] RSP: 0018:ffff8880aa236980 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 189.842722] RAX: 0000000000000000 RBX: ffff88808ec11978 RCX: ffffffff858e78e9 [ 189.850066] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 [ 189.857338] RBP: ffff8880aa236988 R08: ffff8880aa226240 R09: 0000000000000006 [ 189.864603] R10: ffff8880aa226bb0 R11: 0000000070c3d1f4 R12: dffffc0000000000 [ 189.871861] R13: ffff88808ec116c0 R14: ffff88808ec11a10 R15: 0000000000000000 [ 189.879224] ? hhf_dequeue+0xb9/0xa00 [ 189.883023] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 189.888599] hhf_dequeue+0xb9/0xa00 [ 189.892220] __qdisc_run+0x1e7/0x1960 [ 189.896027] __dev_queue_xmit+0x165c/0x2fe0 [ 189.900355] ? deliver_clone+0x61/0xc0 [ 189.904236] ? br_flood+0x5fa/0x710 [ 189.907937] ? br_handle_frame_finish+0xf72/0x1510 [ 189.912864] ? netdev_pick_tx+0x300/0x300 [ 189.917099] ? run_ksoftirqd+0x8e/0x110 [ 189.921071] ? smpboot_thread_fn+0x6a3/0xa30 [ 189.925575] ? kthread+0x354/0x420 [ 189.929106] ? entry_SYSCALL_64_after_hwframe+0xbc/0xbe [ 189.934486] ? __lock_is_held+0xb6/0x140 [ 189.938719] dev_queue_xmit+0x18/0x20 [ 189.942517] ? dev_queue_xmit+0x18/0x20 [ 189.946549] br_dev_queue_push_xmit+0x405/0x5d0 [ 189.951397] ? br_nf_dev_queue_xmit+0x38c/0x1610 [ 189.956162] br_nf_dev_queue_xmit+0x365/0x1610 [ 189.960829] br_nf_post_routing+0x76f/0x12f0 [ 189.965233] ? find_inlist_lock.constprop.0+0x22a/0x230 [ 189.970695] ? br_nf_dev_queue_xmit+0x1610/0x1610 [ 189.975595] ? ipv6_skip_exthdr+0x5b0/0x5c0 [ 189.979940] ? br_nf_pre_routing_finish_bridge+0xaa0/0xaa0 [ 189.986092] nf_hook_slow+0xbc/0x1e0 [ 189.990045] br_forward_finish+0x215/0x400 [ 189.994319] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 189.999176] ? br_fdb_add.cold+0x8a/0x8a [ 190.003246] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 190.008269] ? nf_hook_slow+0xf0/0x1e0 [ 190.012328] br_nf_hook_thresh+0x2e9/0x370 [ 190.016568] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 190.021401] ? setup_pre_routing+0x470/0x470 [ 190.025984] ? find_held_lock+0x35/0x130 [ 190.030128] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 190.034970] br_nf_forward_finish+0x356/0x700 [ 190.039548] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 190.044477] br_nf_forward_ip+0x6b4/0x17c0 [ 190.048709] ? br_nf_forward_finish+0x700/0x700 [ 190.053382] ? refcount_inc_not_zero_checked+0x147/0x200 [ 190.058914] ? br_nf_hook_thresh+0x370/0x370 [ 190.063328] nf_hook_slow+0xbc/0x1e0 [ 190.067039] __br_forward+0x393/0xb30 [ 190.070850] ? br_forward_finish+0x400/0x400 [ 190.075256] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 190.080109] deliver_clone+0x61/0xc0 [ 190.083822] br_flood+0x5fa/0x710 [ 190.087369] br_handle_frame_finish+0xf72/0x1510 [ 190.092159] ? br_handle_local_finish+0x20/0x20 [ 190.097594] ? __lock_is_held+0xb6/0x140 [ 190.101667] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 190.106773] ? nf_hook_slow+0xf0/0x1e0 [ 190.110952] br_nf_hook_thresh+0x2e9/0x370 [ 190.115214] ? br_handle_local_finish+0x20/0x20 [ 190.119903] ? setup_pre_routing+0x470/0x470 [ 190.124405] ? br_handle_local_finish+0x20/0x20 [ 190.129073] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 190.134259] br_nf_pre_routing_finish_ipv6+0x6ed/0xd70 [ 190.139585] ? br_handle_local_finish+0x20/0x20 [ 190.144273] ? kasan_check_read+0x11/0x20 [ 190.148431] br_nf_pre_routing_ipv6+0x4a5/0x8ca [ 190.153102] ? br_validate_ipv6+0xb90/0xb90 [ 190.157607] ? br_nf_pre_routing_finish.cold+0x11d/0x11d [ 190.163067] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 190.168609] ? skb_pull_rcsum+0x164/0x340 [ 190.172757] br_nf_pre_routing+0x1016/0x159c [ 190.177164] ? br_nf_pre_routing_finish+0x1960/0x1960 [ 190.182452] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 190.187985] ? ebt_broute+0x127/0x190 [ 190.191784] nf_hook_slow+0xbc/0x1e0 [ 190.195506] br_handle_frame+0x985/0x1480 [ 190.199661] ? br_handle_frame_finish+0x1510/0x1510 [ 190.204676] ? br_handle_local_finish+0x20/0x20 [ 190.209346] ? br_handle_frame_finish+0x1510/0x1510 [ 190.214366] __netif_receive_skb_core+0xac1/0x3570 [ 190.219290] ? __lock_acquire+0x6ee/0x49c0 [ 190.223618] ? netif_receive_skb+0x2d0/0x2d0 [ 190.228122] ? mark_held_locks+0x100/0x100 [ 190.232355] ? __lock_acquire+0x6ee/0x49c0 [ 190.236608] ? process_backlog+0x482/0x7a0 [ 190.240844] __netif_receive_skb_one_core+0xa8/0x1a0 [ 190.245943] ? __netif_receive_skb_one_core+0xa8/0x1a0 [ 190.251219] ? __netif_receive_skb_core+0x3570/0x3570 [ 190.256423] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 190.261958] ? check_preemption_disabled+0x48/0x290 [ 190.267003] ? lock_acquire+0x16f/0x3f0 [ 190.270976] __netif_receive_skb+0x2c/0x1d0 [ 190.275295] process_backlog+0x23a/0x7a0 [ 190.279436] ? net_rx_action+0x27b/0x1070 [ 190.283594] ? lockdep_hardirqs_on+0x19b/0x5d0 [ 190.288213] net_rx_action+0x4f5/0x1070 [ 190.292202] ? napi_complete_done+0x500/0x500 [ 190.296695] ? sched_clock+0x2e/0x50 [ 190.300413] __do_softirq+0x25c/0x921 [ 190.304216] ? pci_mmcfg_check_reserved+0x170/0x170 [ 190.309247] ? takeover_tasklets+0x7b0/0x7b0 [ 190.313649] run_ksoftirqd+0x8e/0x110 [ 190.317443] smpboot_thread_fn+0x6a3/0xa30 [ 190.321685] ? sort_range+0x30/0x30 [ 190.325305] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 190.330834] ? __kthread_parkme+0xfb/0x1b0 [ 190.335061] kthread+0x354/0x420 [ 190.338432] ? sort_range+0x30/0x30 [ 190.342055] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 190.347597] ret_from_fork+0x24/0x30