[ 70.138301][ T26] audit: type=1800 audit(1564348627.374:27): pid=9968 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 70.159418][ T26] audit: type=1800 audit(1564348627.374:28): pid=9968 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 70.820630][ T26] audit: type=1800 audit(1564348628.134:29): pid=9968 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 70.840792][ T26] audit: type=1800 audit(1564348628.144:30): pid=9968 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.138' (ECDSA) to the list of known hosts. syzkaller login: [ 191.517103][T10121] IPVS: ftp: loaded support on port[0] = 21 [ 191.561670][T10121] chnl_net:caif_netlink_parms(): no params data found [ 191.583173][T10121] bridge0: port 1(bridge_slave_0) entered blocking state [ 191.590431][T10121] bridge0: port 1(bridge_slave_0) entered disabled state [ 191.597905][T10121] device bridge_slave_0 entered promiscuous mode [ 191.605263][T10121] bridge0: port 2(bridge_slave_1) entered blocking state [ 191.612399][T10121] bridge0: port 2(bridge_slave_1) entered disabled state [ 191.620112][T10121] device bridge_slave_1 entered promiscuous mode [ 191.634074][T10121] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 191.644193][T10121] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 191.659876][T10121] team0: Port device team_slave_0 added [ 191.666812][T10121] team0: Port device team_slave_1 added [ 191.715284][T10121] device hsr_slave_0 entered promiscuous mode [ 191.783761][T10121] device hsr_slave_1 entered promiscuous mode [ 191.858993][T10121] bridge0: port 2(bridge_slave_1) entered blocking state [ 191.866063][T10121] bridge0: port 2(bridge_slave_1) entered forwarding state [ 191.873312][T10121] bridge0: port 1(bridge_slave_0) entered blocking state [ 191.880394][T10121] bridge0: port 1(bridge_slave_0) entered forwarding state [ 191.906080][T10121] 8021q: adding VLAN 0 to HW filter on device bond0 [ 191.916152][ T3021] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 191.935503][ T3021] bridge0: port 1(bridge_slave_0) entered disabled state [ 191.942760][ T3021] bridge0: port 2(bridge_slave_1) entered disabled state [ 191.950840][ T3021] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 191.961231][T10121] 8021q: adding VLAN 0 to HW filter on device team0 [ 191.970172][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 191.978571][ T22] bridge0: port 1(bridge_slave_0) entered blocking state [ 191.985634][ T22] bridge0: port 1(bridge_slave_0) entered forwarding state [ 191.995727][ T3021] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 192.004085][ T3021] bridge0: port 2(bridge_slave_1) entered blocking state [ 192.011107][ T3021] bridge0: port 2(bridge_slave_1) entered forwarding state [ 192.029684][T10121] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 192.040224][T10121] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 192.052265][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 192.060960][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 192.069279][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 192.077825][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 192.086003][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 192.093540][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready executing program [ 192.108491][T10121] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 192.137378][ C0] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 297.303570][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 297.310220][ C0] rcu: 0-...!: (10500 ticks this GP) idle=28e/1/0x4000000000000002 softirq=10127/10127 fqs=0 [ 297.320528][ C0] (t=10501 jiffies g=10317 q=5) [ 297.325454][ C0] rcu: rcu_preempt kthread starved for 10502 jiffies! g10317 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 [ 297.336792][ C0] rcu: RCU grace-period kthread stack dump: [ 297.342666][ C0] rcu_preempt I29120 10 2 0x80004000 [ 297.348990][ C0] Call Trace: [ 297.352339][ C0] __schedule+0x755/0x15b0 [ 297.356752][ C0] ? __sched_text_start+0x8/0x8 [ 297.361597][ C0] schedule+0xa8/0x270 [ 297.365656][ C0] schedule_timeout+0x486/0xc50 [ 297.370502][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 297.375427][ C0] ? usleep_range+0x170/0x170 [ 297.380102][ C0] ? trace_hardirqs_on+0x67/0x240 [ 297.385128][ C0] ? __kasan_check_read+0x11/0x20 [ 297.390142][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 297.395680][ C0] ? swake_up_one+0x60/0x60 [ 297.400172][ C0] ? trace_hardirqs_on+0x67/0x240 [ 297.405189][ C0] rcu_gp_kthread+0x9b2/0x18c0 [ 297.409976][ C0] ? rcu_barrier+0x310/0x310 [ 297.415194][ C0] ? trace_hardirqs_on+0x67/0x240 [ 297.420202][ C0] ? __kasan_check_read+0x11/0x20 [ 297.425221][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 297.431451][ C0] ? __kthread_parkme+0x108/0x1c0 [ 297.436466][ C0] ? __kasan_check_read+0x11/0x20 [ 297.441491][ C0] kthread+0x361/0x430 [ 297.445553][ C0] ? rcu_barrier+0x310/0x310 [ 297.450134][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 297.456365][ C0] ret_from_fork+0x24/0x30 [ 297.460805][ C0] NMI backtrace for cpu 0 [ 297.465130][ C0] CPU: 0 PID: 10121 Comm: syz-executor913 Not tainted 5.3.0-rc1-next-20190726 #53 [ 297.474303][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 297.484353][ C0] Call Trace: [ 297.487622][ C0] [ 297.490470][ C0] dump_stack+0x172/0x1f0 [ 297.494822][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 297.500011][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 297.506259][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 297.511890][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 297.517862][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 297.523745][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 297.528851][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 297.534386][ C0] ? raise_softirq+0x138/0x340 [ 297.539142][ C0] update_process_times+0x32/0x80 [ 297.544169][ C0] tick_sched_handle+0xa2/0x190 [ 297.549006][ C0] tick_sched_timer+0x53/0x140 [ 297.553763][ C0] __hrtimer_run_queues+0x364/0xe40 [ 297.558950][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 297.564225][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 297.569758][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 297.575465][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 297.581612][ C0] hrtimer_interrupt+0x314/0x770 [ 297.586551][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 297.592083][ C0] apic_timer_interrupt+0xf/0x20 [ 297.597012][ C0] RIP: 0010:check_memory_region+0x3a/0x1a0 [ 297.602814][ C0] Code: 7f ff ff 55 0f b6 d2 48 39 c7 48 89 e5 41 55 41 54 53 0f 86 07 01 00 00 4c 8d 5c 37 ff 49 89 f8 48 b8 00 00 00 00 00 fc ff df <4d> 89 da 49 c1 e8 03 4d 8d 24 00 49 c1 ea 03 49 01 c2 4c 89 e0 49 [ 297.622413][ C0] RSP: 0018:ffff8880ae8091d8 EFLAGS: 00000212 ORIG_RAX: ffffffffffffff13 [ 297.630809][ C0] RAX: dffffc0000000000 RBX: ffff8880a6648d48 RCX: ffffffff8159a3d7 [ 297.638765][ C0] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880a6648d48 [ 297.646726][ C0] RBP: ffff8880ae8091f0 R08: ffff8880a6648d48 R09: ffffed1014cc91aa [ 297.654685][ C0] R10: ffffed1014cc91a9 R11: ffff8880a6648d4b R12: 0000000000000001 [ 297.662645][ C0] R13: 0000000000000003 R14: ffffed1014cc91a9 R15: 0000000000000001 [ 297.670615][ C0] ? apic_timer_interrupt+0xa/0x20 [ 297.675722][ C0] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 297.682046][ C0] __kasan_check_read+0x11/0x20 [ 297.686884][ C0] native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 297.693028][ C0] ? __pv_queued_spin_lock_slowpath+0xd10/0xd10 [ 297.699289][ C0] ? mark_held_locks+0xf0/0xf0 [ 297.704043][ C0] do_raw_spin_lock+0x20e/0x2e0 [ 297.708884][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 297.713811][ C0] ? lock_acquire+0x190/0x410 [ 297.718478][ C0] ? release_sock+0x20/0x1c0 [ 297.723061][ C0] ? __kasan_check_read+0x11/0x20 [ 297.728080][ C0] _raw_spin_lock_bh+0x3b/0x50 [ 297.732828][ C0] ? release_sock+0x20/0x1c0 [ 297.737669][ C0] release_sock+0x20/0x1c0 [ 297.742079][ C0] wait_on_pending_writer+0x20f/0x420 [ 297.747441][ C0] ? ip6_rcv_finish+0x1de/0x2f0 [ 297.752293][ C0] ? tls_init+0x560/0x560 [ 297.756626][ C0] ? process_backlog+0x206/0x750 [ 297.761549][ C0] ? net_rx_action+0x508/0x10c0 [ 297.766391][ C0] ? __do_softirq+0x262/0x98c [ 297.771072][ C0] ? prepare_to_wait_exclusive+0x320/0x320 [ 297.776870][ C0] ? inet_release+0xed/0x200 [ 297.781444][ C0] ? inet6_release+0x53/0x80 [ 297.786022][ C0] ? __sock_release+0xce/0x280 [ 297.790772][ C0] ? sock_close+0x1e/0x30 [ 297.795089][ C0] ? __fput+0x2ff/0x890 [ 297.799231][ C0] ? ____fput+0x16/0x20 [ 297.803389][ C0] ? task_work_run+0x145/0x1c0 [ 297.808147][ C0] ? exit_to_usermode_loop+0x316/0x380 [ 297.813598][ C0] tls_sk_proto_cleanup+0x2c5/0x3e0 [ 297.818785][ C0] ? wait_on_pending_writer+0x420/0x420 [ 297.824322][ C0] tls_sk_proto_unhash+0x90/0x3f0 [ 297.829334][ C0] tcp_set_state+0x5b9/0x7d0 [ 297.833915][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 297.840142][ C0] ? __sk_mem_reduce_allocated+0x1b0/0x560 [ 297.845936][ C0] ? tcp_alloc_md5sig_pool+0x4a0/0x4a0 [ 297.851386][ C0] ? __sk_mem_reclaim+0x55/0x70 [ 297.856223][ C0] ? tcp_write_queue_purge+0x5d8/0x1310 [ 297.861761][ C0] ? inet6_sk_rx_dst_set+0x244/0x6f0 [ 297.867037][ C0] tcp_done+0xe2/0x320 [ 297.871102][ C0] tcp_reset+0x132/0x500 [ 297.875339][ C0] tcp_validate_incoming+0xa2d/0x1660 [ 297.880749][ C0] tcp_rcv_established+0x6b5/0x1e70 [ 297.885941][ C0] ? mark_held_locks+0xf0/0xf0 [ 297.890694][ C0] ? sk_filter_trim_cap+0x45f/0xb30 [ 297.895884][ C0] ? tcp_data_queue+0x4860/0x4860 [ 297.900896][ C0] ? do_raw_spin_lock+0x12a/0x2e0 [ 297.905911][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 297.910837][ C0] ? lock_acquire+0x190/0x410 [ 297.915519][ C0] tcp_v6_do_rcv+0x41e/0x12c0 [ 297.920187][ C0] tcp_v6_rcv+0x31f1/0x3500 [ 297.924693][ C0] ? tcp_v6_syn_recv_sock+0x2290/0x2290 [ 297.930225][ C0] ? nf_confirm+0x360/0x4d0 [ 297.934728][ C0] ? mark_held_locks+0xf0/0xf0 [ 297.939481][ C0] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 297.945115][ C0] ip6_input_finish+0x84/0x170 [ 297.949866][ C0] ip6_input+0xe4/0x3f0 [ 297.954010][ C0] ? ip6_input_finish+0x170/0x170 [ 297.959022][ C0] ? __kasan_check_read+0x11/0x20 [ 297.964037][ C0] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 297.969935][ C0] ? lock_downgrade+0x920/0x920 [ 297.974776][ C0] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 297.981008][ C0] ip6_rcv_finish+0x1de/0x2f0 [ 297.985674][ C0] ipv6_rcv+0x10e/0x420 [ 297.989819][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 297.995265][ C0] ? lock_downgrade+0x920/0x920 [ 298.000119][ C0] ? lock_downgrade+0x920/0x920 [ 298.004974][ C0] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 298.010855][ C0] ? trace_hardirqs_off+0x62/0x240 [ 298.015968][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 298.021416][ C0] __netif_receive_skb_one_core+0x113/0x1a0 [ 298.027303][ C0] ? __netif_receive_skb_core+0x3060/0x3060 [ 298.033186][ C0] ? lock_acquire+0x190/0x410 [ 298.037852][ C0] ? process_backlog+0x195/0x750 [ 298.042780][ C0] __netif_receive_skb+0x2c/0x1d0 [ 298.047801][ C0] process_backlog+0x206/0x750 [ 298.052567][ C0] ? lock_acquire+0x190/0x410 [ 298.057235][ C0] ? clockevents_program_event+0x15a/0x370 [ 298.063030][ C0] net_rx_action+0x508/0x10c0 [ 298.067703][ C0] ? napi_complete_done+0x4b0/0x4b0 [ 298.072889][ C0] ? sched_clock+0x2e/0x50 [ 298.077299][ C0] ? kvm_clock_read+0x18/0x30 [ 298.081963][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 298.087323][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 298.093554][ C0] __do_softirq+0x262/0x98c [ 298.098051][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 298.103409][ C0] do_softirq_own_stack+0x2a/0x40 [ 298.108413][ C0] [ 298.111342][ C0] do_softirq.part.0+0x11a/0x170 [ 298.116280][ C0] __local_bh_enable_ip+0x211/0x270 [ 298.121477][ C0] inet_csk_listen_stop+0x1e0/0x850 [ 298.126672][ C0] tcp_close+0xd5b/0x10e0 [ 298.130988][ C0] ? ip_mc_drop_socket+0x211/0x270 [ 298.136085][ C0] ? down_write+0xdf/0x150 [ 298.140492][ C0] inet_release+0xed/0x200 [ 298.144905][ C0] inet6_release+0x53/0x80 [ 298.149341][ C0] __sock_release+0xce/0x280 [ 298.153922][ C0] sock_close+0x1e/0x30 [ 298.158070][ C0] __fput+0x2ff/0x890 [ 298.162038][ C0] ? __sock_release+0x280/0x280 [ 298.166874][ C0] ____fput+0x16/0x20 [ 298.170845][ C0] task_work_run+0x145/0x1c0 [ 298.175433][ C0] exit_to_usermode_loop+0x316/0x380 [ 298.180712][ C0] do_syscall_64+0x65f/0x760 [ 298.185294][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 298.191174][ C0] RIP: 0033:0x406571 [ 298.195064][ C0] Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 24 1a 00 00 c3 48 83 ec 08 e8 6a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 b3 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 [ 298.214656][ C0] RSP: 002b:00007ffd85c003d0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 298.223076][ C0] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000406571 [ 298.231145][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 298.244406][ C0] RBP: 00000000006dcc20 R08: 0000000000000140 R09: 0000000000000140 [ 298.252408][ C0] R10: 00007ffd85c00400 R11: 0000000000000293 R12: 00007ffd85c00430 [ 298.260366][ C0] R13: 00000000006dcc2c R14: 000000000000002d R15: 0000000000000007