[ 39.178185] audit: type=1800 audit(1568451946.365:32): pid=7445 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. [ 39.899264] audit: type=1800 audit(1568451947.175:33): pid=7445 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 '10.128.0.104' (ECDSA) to the list of known hosts. syzkaller login: [ 332.908385] kauditd_printk_skb: 2 callbacks suppressed [ 332.908406] audit: type=1400 audit(1568452240.185:36): avc: denied { map } for pid=7630 comm="syz-executor749" path="/root/syz-executor749648848" 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 [ 332.928889] IPVS: ftp: loaded support on port[0] = 21 [ 333.002774] chnl_net:caif_netlink_parms(): no params data found [ 333.035810] bridge0: port 1(bridge_slave_0) entered blocking state [ 333.042575] bridge0: port 1(bridge_slave_0) entered disabled state [ 333.050112] device bridge_slave_0 entered promiscuous mode [ 333.057540] bridge0: port 2(bridge_slave_1) entered blocking state [ 333.064034] bridge0: port 2(bridge_slave_1) entered disabled state [ 333.070957] device bridge_slave_1 entered promiscuous mode [ 333.086779] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 333.095903] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 333.112321] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 333.120171] team0: Port device team_slave_0 added [ 333.125689] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 333.133078] team0: Port device team_slave_1 added [ 333.138504] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 333.145819] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 333.225863] device hsr_slave_0 entered promiscuous mode [ 333.294562] device hsr_slave_1 entered promiscuous mode [ 333.344634] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 333.351651] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 333.365521] bridge0: port 2(bridge_slave_1) entered blocking state [ 333.371939] bridge0: port 2(bridge_slave_1) entered forwarding state [ 333.378903] bridge0: port 1(bridge_slave_0) entered blocking state [ 333.385312] bridge0: port 1(bridge_slave_0) entered forwarding state [ 333.416712] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 333.423426] 8021q: adding VLAN 0 to HW filter on device bond0 [ 333.433164] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 333.441999] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 333.460903] bridge0: port 1(bridge_slave_0) entered disabled state [ 333.468350] bridge0: port 2(bridge_slave_1) entered disabled state [ 333.476494] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 333.486533] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 333.492704] 8021q: adding VLAN 0 to HW filter on device team0 [ 333.502311] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 333.510327] bridge0: port 1(bridge_slave_0) entered blocking state [ 333.516843] bridge0: port 1(bridge_slave_0) entered forwarding state [ 333.526791] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 333.534483] bridge0: port 2(bridge_slave_1) entered blocking state [ 333.540832] bridge0: port 2(bridge_slave_1) entered forwarding state [ 333.554347] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 333.562850] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 333.572144] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 333.582782] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 333.592737] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 333.603556] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 333.609804] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 333.622229] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 333.632652] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 438.683930] rcu: INFO: rcu_preempt self-detected stall on CPU [ 438.690263] rcu: 1-...!: (1 GPs behind) idle=4a2/0/0x3 softirq=11814/11815 fqs=23 [ 438.698257] rcu: (t=10500 jiffies g=5381 q=21) [ 438.703188] rcu: rcu_preempt kthread starved for 10454 jiffies! g5381 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 438.713576] rcu: RCU grace-period kthread stack dump: [ 438.718746] rcu_preempt R running task 29424 10 2 0x80000000 [ 438.726024] Call Trace: [ 438.728720] __schedule+0x866/0x1dc0 [ 438.732437] ? pci_mmcfg_check_reserved+0x170/0x170 [ 438.737438] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 438.742572] ? lockdep_hardirqs_on+0x415/0x5d0 [ 438.747272] ? trace_hardirqs_on+0x67/0x220 [ 438.751583] schedule+0x92/0x1c0 [ 438.754934] schedule_timeout+0x4db/0xfc0 [ 438.759075] ? usleep_range+0x170/0x170 [ 438.763209] ? trace_hardirqs_on+0x67/0x220 [ 438.767566] ? kasan_check_read+0x11/0x20 [ 438.771725] ? __next_timer_interrupt+0x1a0/0x1a0 [ 438.776688] ? prepare_to_swait_exclusive+0x120/0x120 [ 438.781896] rcu_gp_kthread+0xd5c/0x2190 [ 438.785974] ? rcu_blocking_is_gp+0x90/0x90 [ 438.790284] ? trace_hardirqs_on+0x67/0x220 [ 438.794601] ? kasan_check_read+0x11/0x20 [ 438.798767] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 438.805289] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 438.810964] ? __kthread_parkme+0xfb/0x1b0 [ 438.815297] kthread+0x354/0x420 [ 438.818660] ? rcu_blocking_is_gp+0x90/0x90 [ 438.822976] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 438.830709] ret_from_fork+0x24/0x30 [ 438.834428] NMI backtrace for cpu 1 [ 438.838482] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.19.72 #0 [ 438.844940] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 438.854288] Call Trace: [ 438.856866] [ 438.859084] dump_stack+0x172/0x1f0 [ 438.862803] nmi_cpu_backtrace.cold+0x63/0xa4 [ 438.867340] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 438.872268] nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 [ 438.877536] arch_trigger_cpumask_backtrace+0x14/0x20 [ 438.882901] rcu_dump_cpu_stacks+0x189/0x1d5 [ 438.887343] ? wake_up_process+0x10/0x20 [ 438.891408] rcu_check_callbacks.cold+0x5e3/0xd90 [ 438.896242] ? trace_hardirqs_off+0x62/0x220 [ 438.900683] update_process_times+0x32/0x80 [ 438.905025] tick_sched_handle+0xa2/0x190 [ 438.909165] tick_sched_timer+0x47/0x130 [ 438.913218] __hrtimer_run_queues+0x33b/0xdc0 [ 438.917704] ? tick_sched_do_timer+0x1b0/0x1b0 [ 438.922278] ? hrtimer_fixup_activate+0x30/0x30 [ 438.926937] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 438.932550] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 438.937906] hrtimer_interrupt+0x314/0x770 [ 438.942140] smp_apic_timer_interrupt+0x111/0x550 [ 438.947069] apic_timer_interrupt+0xf/0x20 [ 438.951294] RIP: 0010:write_comp_data+0x10/0x70 [ 438.955952] Code: 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 00 01 1f 00 75 51 41 8b 80 d0 12 00 00 83 f8 03 75 45 49 8b 80 [ 438.974841] RSP: 0018:ffff8880ae906fb0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 438.982541] RAX: 0000000000000702 RBX: ffff8880a6859df8 RCX: ffffffff858e78e9 [ 438.989806] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 [ 438.997157] RBP: ffff8880ae906fb8 R08: ffff8880aa2703c0 R09: 0000000000000007 [ 439.004414] R10: ffff8880aa270d58 R11: 000000006028c30c R12: dffffc0000000000 [ 439.011692] R13: ffff8880a6859b40 R14: ffff8880a6859e90 R15: 0000000000000000 [ 439.018975] ? apic_timer_interrupt+0xa/0x20 [ 439.023502] ? hhf_dequeue+0xb9/0xa00 [ 439.027302] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 439.032830] hhf_dequeue+0xb9/0xa00 [ 439.036502] __qdisc_run+0x1e7/0x1960 [ 439.040353] __dev_queue_xmit+0x165c/0x2fe0 [ 439.044669] ? netdev_pick_tx+0x300/0x300 [ 439.048810] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 439.054395] ? br_nf_post_routing+0x780/0x12f0 [ 439.058993] ? br_forward_finish+0x235/0x400 [ 439.063415] ? find_held_lock+0x35/0x130 [ 439.067495] ? br_forward_finish+0x235/0x400 [ 439.071895] dev_queue_xmit+0x18/0x20 [ 439.075738] ? dev_queue_xmit+0x18/0x20 [ 439.079744] br_dev_queue_push_xmit+0x405/0x5d0 [ 439.084417] ? kasan_check_read+0x11/0x20 [ 439.088556] br_forward_finish+0xfa/0x400 [ 439.092694] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 439.097529] ? br_fdb_add.cold+0x8a/0x8a [ 439.101591] ? kasan_check_read+0x11/0x20 [ 439.105740] __br_forward+0x647/0xb30 [ 439.109536] ? br_forward_finish+0x400/0x400 [ 439.113940] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 439.118778] deliver_clone+0x61/0xc0 [ 439.122482] br_flood+0x4da/0x710 [ 439.125934] br_dev_xmit+0xeeb/0x1490 [ 439.129735] ? br_poll_controller+0x10/0x10 [ 439.134051] ? __lock_is_held+0xb6/0x140 [ 439.138209] dev_hard_start_xmit+0x1a5/0x980 [ 439.142693] ? check_preemption_disabled+0x48/0x290 [ 439.147714] __dev_queue_xmit+0x2704/0x2fe0 [ 439.152024] ? mark_held_locks+0x100/0x100 [ 439.156258] ? netdev_pick_tx+0x300/0x300 [ 439.160452] ? ip6_finish_output+0x574/0xbe0 [ 439.164851] ? find_held_lock+0x35/0x130 [ 439.168904] ? ip6_finish_output+0x574/0xbe0 [ 439.173303] ? mark_held_locks+0xb1/0x100 [ 439.177445] ? ip6_finish_output2+0x1784/0x2550 [ 439.182186] ? ip6_finish_output+0x574/0xbe0 [ 439.186592] ? ip6_finish_output2+0x1784/0x2550 [ 439.191259] dev_queue_xmit+0x18/0x20 [ 439.195048] ? dev_queue_xmit+0x18/0x20 [ 439.199020] ip6_finish_output2+0x12fd/0x2550 [ 439.203565] ? ip6_mtu+0x2e6/0x460 [ 439.207110] ? ip6_forward_finish+0x4d0/0x4d0 [ 439.211595] ? lock_downgrade+0x810/0x810 [ 439.215734] ? kasan_check_read+0x11/0x20 [ 439.219876] ip6_finish_output+0x574/0xbe0 [ 439.224099] ? ip6_finish_output+0x574/0xbe0 [ 439.228584] ip6_output+0x235/0x7c0 [ 439.232201] ? ip6_finish_output+0xbe0/0xbe0 [ 439.236601] ? ip6_fragment+0x3770/0x3770 [ 439.240738] ? icmp6_dst_alloc+0x432/0x660 [ 439.245009] mld_sendpack+0x9d3/0xeb0 [ 439.248802] ? nf_hook.constprop.0+0x560/0x560 [ 439.253374] ? mld_ifc_timer_expire+0x437/0x8a0 [ 439.258080] ? __local_bh_enable_ip+0x15a/0x270 [ 439.262740] mld_ifc_timer_expire+0x449/0x8a0 [ 439.267319] call_timer_fn+0x18d/0x720 [ 439.271193] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 439.275850] ? process_timeout+0x40/0x40 [ 439.279922] ? run_timer_softirq+0x647/0x1700 [ 439.284408] ? trace_hardirqs_on+0x67/0x220 [ 439.290364] ? kasan_check_read+0x11/0x20 [ 439.294517] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 439.299209] run_timer_softirq+0x652/0x1700 [ 439.303541] ? add_timer+0xbe0/0xbe0 [ 439.307336] ? kvm_clock_read+0x18/0x30 [ 439.311312] ? check_preemption_disabled+0x48/0x290 [ 439.316364] ? sched_clock+0x2e/0x50 [ 439.320080] __do_softirq+0x25c/0x921 [ 439.323875] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 439.329411] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 439.334953] irq_exit+0x180/0x1d0 [ 439.338417] smp_apic_timer_interrupt+0x13b/0x550 [ 439.343267] apic_timer_interrupt+0xf/0x20 [ 439.347496] [ 439.349730] RIP: 0010:native_safe_halt+0xe/0x10 [ 439.354493] Code: ff ff 48 89 df e8 72 12 ae fa eb 82 e9 07 00 00 00 0f 00 2d 94 03 54 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 84 03 54 00 fb f4 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 be f4 65 fa e8 69 [ 439.373380] RSP: 0018:ffff8880aa27fd00 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 439.381085] RAX: 1ffffffff10e48c4 RBX: ffff8880aa2703c0 RCX: 0000000000000000 [ 439.388349] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880aa270c3c [ 439.395615] RBP: ffff8880aa27fd30 R08: ffff8880aa2703c0 R09: 0000000000000000 [ 439.402869] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 439.410133] R13: ffffffff88724610 R14: 0000000000000001 R15: 0000000000000000 [ 439.417407] ? default_idle+0x4e/0x320 [ 439.421291] arch_cpu_idle+0xa/0x10 [ 439.424905] default_idle_call+0x36/0x90 [ 439.429020] do_idle+0x377/0x560 [ 439.432387] ? arch_cpu_idle_exit+0x80/0x80 [ 439.436713] cpu_startup_entry+0xc8/0xe0 [ 439.440759] ? cpu_in_idle+0x20/0x20 [ 439.444511] ? setup_APIC_timer+0x1aa/0x200 [ 439.448830] start_secondary+0x3e8/0x5b0 [ 439.452886] ? set_cpu_sibling_map+0x1860/0x1860 [ 439.457659] secondary_startup_64+0xa4/0xb0