[ 66.633211][ T27] audit: type=1800 audit(1564302373.032:27): pid=9905 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 66.657479][ T27] audit: type=1800 audit(1564302373.042:28): pid=9905 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. [ 67.374057][ T27] audit: type=1800 audit(1564302373.862:29): pid=9905 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 [ 67.397532][ T27] audit: type=1800 audit(1564302373.862:30): pid=9905 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 '10.128.15.215' (ECDSA) to the list of known hosts. syzkaller login: [ 197.062990][T10058] IPVS: ftp: loaded support on port[0] = 21 [ 197.103242][T10058] chnl_net:caif_netlink_parms(): no params data found [ 197.123376][T10058] bridge0: port 1(bridge_slave_0) entered blocking state [ 197.130812][T10058] bridge0: port 1(bridge_slave_0) entered disabled state [ 197.139181][T10058] device bridge_slave_0 entered promiscuous mode [ 197.146547][T10058] bridge0: port 2(bridge_slave_1) entered blocking state [ 197.155377][T10058] bridge0: port 2(bridge_slave_1) entered disabled state [ 197.162917][T10058] device bridge_slave_1 entered promiscuous mode [ 197.176602][T10058] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 197.187321][T10058] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 197.204154][T10058] team0: Port device team_slave_0 added [ 197.210665][T10058] team0: Port device team_slave_1 added [ 197.277469][T10058] device hsr_slave_0 entered promiscuous mode [ 197.326274][T10058] device hsr_slave_1 entered promiscuous mode [ 197.411917][T10058] bridge0: port 2(bridge_slave_1) entered blocking state [ 197.419157][T10058] bridge0: port 2(bridge_slave_1) entered forwarding state [ 197.426551][T10058] bridge0: port 1(bridge_slave_0) entered blocking state [ 197.433618][T10058] bridge0: port 1(bridge_slave_0) entered forwarding state [ 197.461031][T10058] 8021q: adding VLAN 0 to HW filter on device bond0 [ 197.472377][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 197.491098][ T3014] bridge0: port 1(bridge_slave_0) entered disabled state [ 197.498993][ T3014] bridge0: port 2(bridge_slave_1) entered disabled state [ 197.507166][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 197.517048][T10058] 8021q: adding VLAN 0 to HW filter on device team0 [ 197.526545][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 197.534807][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 197.542091][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 197.551385][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 197.561507][ T3014] bridge0: port 2(bridge_slave_1) entered blocking state [ 197.568656][ T3014] bridge0: port 2(bridge_slave_1) entered forwarding state [ 197.582768][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 197.591306][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 197.603090][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready executing program [ 197.614644][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 197.625210][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 197.634760][T10058] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 197.649395][T10058] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 197.677920][ C0] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 302.845882][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 302.852520][ C0] rcu: 0-....: (10500 ticks this GP) idle=e12/1/0x4000000000000002 softirq=9882/9882 fqs=5250 [ 302.863001][ C0] (t=10502 jiffies g=9761 q=51) [ 302.868031][ C0] NMI backtrace for cpu 0 [ 302.872354][ C0] CPU: 0 PID: 10058 Comm: syz-executor858 Not tainted 5.3.0-rc1-next-20190726 #53 [ 302.881529][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 302.891680][ C0] Call Trace: [ 302.894987][ C0] [ 302.897923][ C0] dump_stack+0x172/0x1f0 [ 302.902258][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 302.907452][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 302.913695][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 302.919336][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 302.925329][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 302.931216][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 302.936317][ C0] ? find_next_bit+0x107/0x130 [ 302.941078][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 302.946614][ C0] ? raise_softirq+0x138/0x340 [ 302.951391][ C0] update_process_times+0x32/0x80 [ 302.956413][ C0] tick_sched_handle+0xa2/0x190 [ 302.961276][ C0] tick_sched_timer+0x53/0x140 [ 302.966037][ C0] __hrtimer_run_queues+0x364/0xe40 [ 302.971227][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 302.976511][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 302.982049][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 302.987768][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 302.993833][ C0] hrtimer_interrupt+0x314/0x770 [ 302.998827][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 303.004371][ C0] apic_timer_interrupt+0xf/0x20 [ 303.009323][ C0] RIP: 0010:__kasan_check_read+0x8/0x20 [ 303.014865][ C0] Code: 8b 4d d0 e9 27 ee ff ff 48 8b 73 58 89 c2 48 c7 c7 c8 a9 89 88 f7 da e8 7a 48 af ff e9 da ee ff ff 90 55 89 f6 31 d2 48 89 e5 <48> 8b 4d 08 e8 cf 26 00 00 5d c3 0f 1f 00 66 2e 0f 1f 84 00 00 00 [ 303.034463][ C0] RSP: 0018:ffff8880ae809200 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 303.042877][ C0] RAX: 0000000000000000 RBX: ffff8880a8cbed08 RCX: ffffffff8159a3d7 [ 303.052357][ C0] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880a8cbed08 [ 303.060598][ C0] RBP: ffff8880ae809200 R08: 1ffff11015197da1 R09: ffffed1015197da2 [ 303.068658][ C0] R10: ffffed1015197da1 R11: ffff8880a8cbed0b R12: 0000000000000001 [ 303.076623][ C0] R13: 0000000000000003 R14: ffffed1015197da1 R15: 0000000000000001 [ 303.084726][ C0] ? apic_timer_interrupt+0xa/0x20 [ 303.089837][ C0] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 303.096250][ C0] native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 303.102399][ C0] ? __pv_queued_spin_lock_slowpath+0xd10/0xd10 [ 303.108640][ C0] ? mark_held_locks+0xf0/0xf0 [ 303.113402][ C0] do_raw_spin_lock+0x20e/0x2e0 [ 303.118336][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 303.123262][ C0] ? lock_acquire+0x190/0x410 [ 303.127985][ C0] ? release_sock+0x20/0x1c0 [ 303.132761][ C0] ? __kasan_check_read+0x11/0x20 [ 303.137796][ C0] _raw_spin_lock_bh+0x3b/0x50 [ 303.142565][ C0] ? release_sock+0x20/0x1c0 [ 303.147152][ C0] release_sock+0x20/0x1c0 [ 303.151616][ C0] wait_on_pending_writer+0x20f/0x420 [ 303.157024][ C0] ? ip6_rcv_finish+0x1de/0x2f0 [ 303.161964][ C0] ? tls_init+0x560/0x560 [ 303.166353][ C0] ? process_backlog+0x206/0x750 [ 303.171285][ C0] ? net_rx_action+0x508/0x10c0 [ 303.176619][ C0] ? __do_softirq+0x262/0x98c [ 303.181302][ C0] ? prepare_to_wait_exclusive+0x320/0x320 [ 303.187186][ C0] ? inet_release+0xed/0x200 [ 303.191796][ C0] ? inet6_release+0x53/0x80 [ 303.196408][ C0] ? __sock_release+0xce/0x280 [ 303.201181][ C0] ? sock_close+0x1e/0x30 [ 303.205508][ C0] ? __fput+0x2ff/0x890 [ 303.209747][ C0] ? ____fput+0x16/0x20 [ 303.214008][ C0] ? task_work_run+0x145/0x1c0 [ 303.218768][ C0] ? exit_to_usermode_loop+0x316/0x380 [ 303.224232][ C0] tls_sk_proto_cleanup+0x2c5/0x3e0 [ 303.229431][ C0] ? wait_on_pending_writer+0x420/0x420 [ 303.234979][ C0] tls_sk_proto_unhash+0x90/0x3f0 [ 303.240074][ C0] tcp_set_state+0x5b9/0x7d0 [ 303.244673][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 303.250910][ C0] ? __sk_mem_reduce_allocated+0x1b0/0x560 [ 303.256734][ C0] ? tcp_alloc_md5sig_pool+0x4a0/0x4a0 [ 303.262190][ C0] ? __sk_mem_reclaim+0x55/0x70 [ 303.267132][ C0] ? tcp_write_queue_purge+0x5d8/0x1310 [ 303.272741][ C0] ? inet6_sk_rx_dst_set+0x244/0x6f0 [ 303.278029][ C0] tcp_done+0xe2/0x320 [ 303.282097][ C0] tcp_reset+0x132/0x500 [ 303.286346][ C0] tcp_validate_incoming+0xa2d/0x1660 [ 303.291718][ C0] tcp_rcv_established+0x6b5/0x1e70 [ 303.296935][ C0] ? mark_held_locks+0xf0/0xf0 [ 303.301756][ C0] ? sk_filter_trim_cap+0x45f/0xb30 [ 303.306975][ C0] ? tcp_data_queue+0x4860/0x4860 [ 303.311997][ C0] ? do_raw_spin_lock+0x12a/0x2e0 [ 303.317023][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 303.321963][ C0] ? lock_acquire+0x190/0x410 [ 303.326657][ C0] tcp_v6_do_rcv+0x41e/0x12c0 [ 303.331344][ C0] tcp_v6_rcv+0x31f1/0x3500 [ 303.335863][ C0] ? tcp_v6_syn_recv_sock+0x2290/0x2290 [ 303.341457][ C0] ? nf_confirm+0x360/0x4d0 [ 303.345966][ C0] ? mark_held_locks+0xf0/0xf0 [ 303.350758][ C0] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 303.356402][ C0] ip6_input_finish+0x84/0x170 [ 303.361163][ C0] ip6_input+0xe4/0x3f0 [ 303.365313][ C0] ? ip6_input_finish+0x170/0x170 [ 303.370337][ C0] ? __kasan_check_read+0x11/0x20 [ 303.375361][ C0] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 303.381251][ C0] ? lock_downgrade+0x920/0x920 [ 303.386104][ C0] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 303.392348][ C0] ip6_rcv_finish+0x1de/0x2f0 [ 303.397020][ C0] ipv6_rcv+0x10e/0x420 [ 303.401172][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 303.406622][ C0] ? lock_downgrade+0x920/0x920 [ 303.411461][ C0] ? lock_downgrade+0x920/0x920 [ 303.416311][ C0] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 303.422196][ C0] ? trace_hardirqs_off+0x62/0x240 [ 303.427306][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 303.432774][ C0] __netif_receive_skb_one_core+0x113/0x1a0 [ 303.438666][ C0] ? __netif_receive_skb_core+0x3060/0x3060 [ 303.444563][ C0] ? lock_acquire+0x190/0x410 [ 303.449233][ C0] ? process_backlog+0x195/0x750 [ 303.454167][ C0] __netif_receive_skb+0x2c/0x1d0 [ 303.459190][ C0] process_backlog+0x206/0x750 [ 303.463946][ C0] ? lock_acquire+0x190/0x410 [ 303.468619][ C0] ? clockevents_program_event+0x15a/0x370 [ 303.474426][ C0] net_rx_action+0x508/0x10c0 [ 303.479103][ C0] ? napi_complete_done+0x4b0/0x4b0 [ 303.484302][ C0] ? sched_clock+0x2e/0x50 [ 303.488729][ C0] ? kvm_clock_read+0x18/0x30 [ 303.493408][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 303.498774][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 303.505015][ C0] __do_softirq+0x262/0x98c [ 303.509604][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 303.515088][ C0] do_softirq_own_stack+0x2a/0x40 [ 303.520099][ C0] [ 303.523048][ C0] do_softirq.part.0+0x11a/0x170 [ 303.527984][ C0] __local_bh_enable_ip+0x211/0x270 [ 303.533207][ C0] inet_csk_listen_stop+0x1e0/0x850 [ 303.538416][ C0] tcp_close+0xd5b/0x10e0 [ 303.542739][ C0] ? ip_mc_drop_socket+0x211/0x270 [ 303.547856][ C0] ? down_write+0xdf/0x150 [ 303.552286][ C0] inet_release+0xed/0x200 [ 303.556699][ C0] inet6_release+0x53/0x80 [ 303.561136][ C0] __sock_release+0xce/0x280 [ 303.565727][ C0] sock_close+0x1e/0x30 [ 303.569879][ C0] __fput+0x2ff/0x890 [ 303.573854][ C0] ? __sock_release+0x280/0x280 [ 303.578708][ C0] ____fput+0x16/0x20 [ 303.582688][ C0] task_work_run+0x145/0x1c0 [ 303.587296][ C0] exit_to_usermode_loop+0x316/0x380 [ 303.592586][ C0] do_syscall_64+0x65f/0x760 [ 303.597173][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 303.603059][ C0] RIP: 0033:0x406571 [ 303.606954][ 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 [ 303.626650][ C0] RSP: 002b:00007ffd4e7c9290 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 303.635066][ C0] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000406571 [ 303.643038][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 303.651100][ C0] RBP: 00000000006dcc20 R08: 0000000000000140 R09: 0000000000000140 [ 303.659188][ C0] R10: 00007ffd4e7c92c0 R11: 0000000000000293 R12: 00007ffd4e7c92f0 [ 303.667172][ C0] R13: 00000000006dcc2c R14: 000000000000002d R15: 0000000000000007 [ 306.515978][T10060] rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-... } 10842 jiffies s: 105 root: 0x1/. [ 306.528145][T10060] rcu: blocking rcu_node structures: [ 306.533453][T10060] Task dump for CPU 0: [ 306.537893][T10060] syz-executor858 R running task 24264 10058 10057 0x8000000a [ 306.546662][T10060] Call Trace: [ 306.549962][T10060] ? __kasan_check_read+0x11/0x20 [ 306.554987][T10060] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 306.561562][T10060] ? lock_downgrade+0x920/0x920 [ 306.567183][T10060] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 306.573521][T10060] ? __this_cpu_preempt_check+0x3a/0x210 [ 306.579449][T10060] ? inet_csk_listen_stop+0x1bc/0x850 [ 306.584838][T10060] ? ksoftirqd_running+0x16/0x70 [ 306.590568][T10060] ? inet_csk_listen_stop+0x1bc/0x850 [ 306.596157][T10060] ? do_softirq.part.0+0x11a/0x170 [ 306.601271][T10060] ? __local_bh_enable_ip+0x211/0x270 [ 306.607470][T10060] ? inet_csk_listen_stop+0x1e0/0x850 [ 306.612943][T10060] ? tcp_close+0xd5b/0x10e0 [ 306.617722][T10060] ? ip_mc_drop_socket+0x211/0x270 [ 306.622840][T10060] ? down_write+0xdf/0x150 [ 306.628073][T10060] ? inet_release+0xed/0x200 [ 306.632669][T10060] ? inet6_release+0x53/0x80 [ 306.637502][T10060] ? __sock_release+0xce/0x280 [ 306.642272][T10060] ? sock_close+0x1e/0x30 [ 306.647345][T10060] ? __fput+0x2ff/0x890 [ 306.651509][T10060] ? __sock_release+0x280/0x280 [ 306.656650][T10060] ? ____fput+0x16/0x20 [ 306.660807][T10060] ? task_work_run+0x145/0x1c0 [ 306.665572][T10060] ? exit_to_usermode_loop+0x316/0x380 [ 306.671858][T10060] ? do_syscall_64+0x65f/0x760 [ 306.676837][T10060] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe