[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting O[ 39.991426] audit: type=1800 audit(1568747493.367:33): pid=7440 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 penBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 44.398879] kauditd_printk_skb: 1 callbacks suppressed [ 44.398893] audit: type=1400 audit(1568747497.767:35): avc: denied { map } for pid=7616 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 '10.128.0.33' (ECDSA) to the list of known hosts. [ 178.371923] audit: type=1400 audit(1568747631.747:36): avc: denied { map } for pid=7628 comm="syz-executor466" path="/root/syz-executor466231371" 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 [ 178.392583] IPVS: ftp: loaded support on port[0] = 21 [ 178.461509] chnl_net:caif_netlink_parms(): no params data found [ 178.492066] bridge0: port 1(bridge_slave_0) entered blocking state [ 178.498794] bridge0: port 1(bridge_slave_0) entered disabled state [ 178.506290] device bridge_slave_0 entered promiscuous mode [ 178.513660] bridge0: port 2(bridge_slave_1) entered blocking state [ 178.520142] bridge0: port 2(bridge_slave_1) entered disabled state [ 178.527044] device bridge_slave_1 entered promiscuous mode [ 178.542829] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 178.551721] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 178.567790] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 178.575533] team0: Port device team_slave_0 added [ 178.581021] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 178.588146] team0: Port device team_slave_1 added [ 178.593503] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 178.600827] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 178.661555] device hsr_slave_0 entered promiscuous mode [ 178.700037] device hsr_slave_1 entered promiscuous mode [ 178.740194] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 178.747106] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 178.761110] bridge0: port 2(bridge_slave_1) entered blocking state [ 178.767524] bridge0: port 2(bridge_slave_1) entered forwarding state [ 178.774505] bridge0: port 1(bridge_slave_0) entered blocking state [ 178.780921] bridge0: port 1(bridge_slave_0) entered forwarding state [ 178.814043] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 178.820285] 8021q: adding VLAN 0 to HW filter on device bond0 [ 178.828159] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 178.836978] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 178.855547] bridge0: port 1(bridge_slave_0) entered disabled state [ 178.862978] bridge0: port 2(bridge_slave_1) entered disabled state [ 178.871427] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 178.881248] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 178.887331] 8021q: adding VLAN 0 to HW filter on device team0 [ 178.911545] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 178.919249] bridge0: port 1(bridge_slave_0) entered blocking state [ 178.925658] bridge0: port 1(bridge_slave_0) entered forwarding state [ 178.932509] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 178.940581] bridge0: port 2(bridge_slave_1) entered blocking state [ 178.947045] bridge0: port 2(bridge_slave_1) entered forwarding state [ 178.954392] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 178.962504] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 178.971906] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 178.979305] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 178.988124] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 178.994266] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 179.001285] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready executing program [ 179.015036] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 179.025112] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 284.029687] rcu: INFO: rcu_preempt self-detected stall on CPU [ 284.035964] rcu: 1-...!: (10500 ticks this GP) idle=ffa/0/0x3 softirq=17577/17577 fqs=0 [ 284.044502] rcu: (t=10500 jiffies g=5177 q=211) [ 284.049358] rcu: rcu_preempt kthread starved for 10500 jiffies! g5177 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 284.059913] rcu: RCU grace-period kthread stack dump: [ 284.065088] rcu_preempt I29152 10 2 0x80000000 [ 284.070767] Call Trace: [ 284.073492] __schedule+0x866/0x1dc0 [ 284.077208] ? pci_mmcfg_check_reserved+0x170/0x170 [ 284.082217] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 284.087371] ? lockdep_hardirqs_on+0x415/0x5d0 [ 284.091983] ? trace_hardirqs_on+0x67/0x220 [ 284.096295] schedule+0x92/0x1c0 [ 284.099651] schedule_timeout+0x4db/0xfc0 [ 284.103816] ? usleep_range+0x170/0x170 [ 284.107782] ? trace_hardirqs_on+0x67/0x220 [ 284.112181] ? kasan_check_read+0x11/0x20 [ 284.116383] ? __next_timer_interrupt+0x1a0/0x1a0 [ 284.121246] ? prepare_to_swait_exclusive+0x120/0x120 [ 284.126462] rcu_gp_kthread+0xd5c/0x2190 [ 284.130521] ? rcu_blocking_is_gp+0x90/0x90 [ 284.134842] ? trace_hardirqs_on+0x67/0x220 [ 284.139156] ? kasan_check_read+0x11/0x20 [ 284.143292] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 284.148416] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 284.153957] ? __kthread_parkme+0xfb/0x1b0 [ 284.158198] kthread+0x354/0x420 [ 284.161548] ? rcu_blocking_is_gp+0x90/0x90 [ 284.165864] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 284.171402] ret_from_fork+0x24/0x30 [ 284.175136] NMI backtrace for cpu 1 [ 284.178757] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.19.73 #0 [ 284.184902] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 284.194254] Call Trace: [ 284.196821] [ 284.198986] dump_stack+0x172/0x1f0 [ 284.202611] nmi_cpu_backtrace.cold+0x63/0xa4 [ 284.207135] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 284.212056] nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 [ 284.217322] arch_trigger_cpumask_backtrace+0x14/0x20 [ 284.222500] rcu_dump_cpu_stacks+0x189/0x1d5 [ 284.226946] ? wake_up_process+0x10/0x20 [ 284.230999] rcu_check_callbacks.cold+0x5e3/0xd90 [ 284.235830] ? trace_hardirqs_off+0x62/0x220 [ 284.240236] update_process_times+0x32/0x80 [ 284.244591] tick_sched_handle+0xa2/0x190 [ 284.248742] tick_sched_timer+0x47/0x130 [ 284.252793] __hrtimer_run_queues+0x33b/0xdc0 [ 284.257288] ? tick_sched_do_timer+0x1b0/0x1b0 [ 284.261875] ? hrtimer_fixup_activate+0x30/0x30 [ 284.266544] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 284.271545] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 284.276904] hrtimer_interrupt+0x314/0x770 [ 284.281148] smp_apic_timer_interrupt+0x111/0x550 [ 284.285981] apic_timer_interrupt+0xf/0x20 [ 284.290204] RIP: 0010:write_comp_data+0x68/0x70 [ 284.294893] Code: 00 00 4e 8d 14 dd 28 00 00 00 4d 39 d0 72 1b 49 83 c1 01 4a 89 7c 10 e0 4a 89 74 10 e8 4a 89 54 10 f0 4a 89 4c d8 20 4c 89 08 0f 1f 80 00 00 00 00 55 40 0f b6 d6 40 0f b6 f7 31 ff 48 89 e5 [ 284.313791] RSP: 0018:ffff8880ae907570 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 [ 284.321489] RAX: 0000000000000502 RBX: ffff8880a0fe74f8 RCX: ffffffff858ebe8e [ 284.328761] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000001 [ 284.336034] RBP: ffff8880ae907578 R08: ffff8880aa2703c0 R09: 0000000000000005 [ 284.343322] R10: ffff8880aa270d08 R11: 00000000cb593ffe R12: dffffc0000000000 [ 284.350594] R13: ffff8880a0fe7240 R14: ffff8880a0fe7598 R15: ffff8880a0fe7590 [ 284.357870] ? apic_timer_interrupt+0xa/0x20 [ 284.362369] ? hhf_dequeue+0x65e/0xa00 [ 284.366259] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 284.371783] hhf_dequeue+0x65e/0xa00 [ 284.375526] __qdisc_run+0x1e7/0x1960 [ 284.379383] __dev_queue_xmit+0x165c/0x2fe0 [ 284.383702] ? netdev_pick_tx+0x300/0x300 [ 284.387898] ? ip6_finish_output2+0xae0/0x2550 [ 284.392473] ? find_held_lock+0x35/0x130 [ 284.396528] ? ip6_finish_output2+0xb7f/0x2550 [ 284.401112] ? mark_held_locks+0xb1/0x100 [ 284.405270] dev_queue_xmit+0x18/0x20 [ 284.409059] ? dev_queue_xmit+0x18/0x20 [ 284.413052] neigh_resolve_output+0x5b7/0x980 [ 284.417559] ip6_finish_output2+0xb7f/0x2550 [ 284.421960] ? ip6_mtu+0x2e6/0x460 [ 284.425505] ? ip6_forward_finish+0x4d0/0x4d0 [ 284.429988] ? lock_downgrade+0x810/0x810 [ 284.434131] ? kasan_check_read+0x11/0x20 [ 284.438285] ip6_finish_output+0x574/0xbe0 [ 284.442509] ? ip6_finish_output+0x574/0xbe0 [ 284.446922] ip6_output+0x235/0x7c0 [ 284.450556] ? ip6_finish_output+0xbe0/0xbe0 [ 284.454962] ? ip6_fragment+0x3770/0x3770 [ 284.459146] ? icmp6_dst_alloc+0x432/0x660 [ 284.463378] mld_sendpack+0x9d3/0xeb0 [ 284.467188] ? nf_hook.constprop.0+0x560/0x560 [ 284.471791] ? mld_ifc_timer_expire+0x437/0x8a0 [ 284.476495] ? __local_bh_enable_ip+0x15a/0x270 [ 284.481157] mld_ifc_timer_expire+0x449/0x8a0 [ 284.485671] call_timer_fn+0x18d/0x720 [ 284.489558] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 284.494215] ? process_timeout+0x40/0x40 [ 284.498264] ? run_timer_softirq+0x647/0x1700 [ 284.502753] ? trace_hardirqs_on+0x67/0x220 [ 284.507066] ? kasan_check_read+0x11/0x20 [ 284.511202] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 284.515862] run_timer_softirq+0x652/0x1700 [ 284.520178] ? add_timer+0xbe0/0xbe0 [ 284.523921] ? kvm_clock_read+0x18/0x30 [ 284.527947] ? check_preemption_disabled+0x48/0x290 [ 284.532981] ? sched_clock+0x2e/0x50 [ 284.536693] __do_softirq+0x25c/0x921 [ 284.540485] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 284.546021] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 284.551553] irq_exit+0x180/0x1d0 [ 284.554995] smp_apic_timer_interrupt+0x13b/0x550 [ 284.559831] apic_timer_interrupt+0xf/0x20 [ 284.564048] [ 284.566276] RIP: 0010:native_safe_halt+0xe/0x10 [ 284.570942] Code: ff ff 48 89 df e8 72 de ad fa eb 82 e9 07 00 00 00 0f 00 2d 84 c3 53 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 74 c3 53 00 fb f4 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 6e c1 65 fa e8 39 [ 284.589830] RSP: 0018:ffff8880aa27fd00 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 284.597526] RAX: 1ffffffff10e48c4 RBX: ffff8880aa2703c0 RCX: 0000000000000000 [ 284.604799] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880aa270c3c [ 284.612068] RBP: ffff8880aa27fd30 R08: ffff8880aa2703c0 R09: 0000000000000000 [ 284.619324] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 284.626582] R13: ffffffff88724610 R14: 0000000000000001 R15: 0000000000000000 [ 284.633868] ? default_idle+0x4e/0x320 [ 284.637764] arch_cpu_idle+0xa/0x10 [ 284.641394] default_idle_call+0x36/0x90 [ 284.645446] do_idle+0x377/0x560 [ 284.648802] ? arch_cpu_idle_exit+0x80/0x80 [ 284.653111] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 284.658220] ? complete+0x61/0x80 [ 284.661665] cpu_startup_entry+0xc8/0xe0 [ 284.665716] ? cpu_in_idle+0x20/0x20 [ 284.669476] ? setup_APIC_timer+0x1aa/0x200 [ 284.673788] start_secondary+0x3e8/0x5b0 [ 284.677836] ? set_cpu_sibling_map+0x1860/0x1860 [ 284.682627] secondary_startup_64+0xa4/0xb0