[ 68.326611][ T26] audit: type=1800 audit(1564312638.476:27): pid=10138 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 68.348320][ T26] audit: type=1800 audit(1564312638.476:28): pid=10138 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. [ 68.915574][ T26] audit: type=1800 audit(1564312639.146:29): pid=10138 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 [ 68.935988][ T26] audit: type=1800 audit(1564312639.146:30): pid=10138 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 '10.128.0.211' (ECDSA) to the list of known hosts. syzkaller login: [ 162.409680][T10295] IPVS: ftp: loaded support on port[0] = 21 [ 162.450136][T10295] chnl_net:caif_netlink_parms(): no params data found [ 162.471194][T10295] bridge0: port 1(bridge_slave_0) entered blocking state [ 162.478751][T10295] bridge0: port 1(bridge_slave_0) entered disabled state [ 162.486355][T10295] device bridge_slave_0 entered promiscuous mode [ 162.493578][T10295] bridge0: port 2(bridge_slave_1) entered blocking state [ 162.500623][T10295] bridge0: port 2(bridge_slave_1) entered disabled state [ 162.508161][T10295] device bridge_slave_1 entered promiscuous mode [ 162.522286][T10295] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 162.532622][T10295] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 162.548313][T10295] team0: Port device team_slave_0 added [ 162.555531][T10295] team0: Port device team_slave_1 added [ 162.613404][T10295] device hsr_slave_0 entered promiscuous mode [ 162.672004][T10295] device hsr_slave_1 entered promiscuous mode [ 162.727847][T10295] bridge0: port 2(bridge_slave_1) entered blocking state [ 162.734949][T10295] bridge0: port 2(bridge_slave_1) entered forwarding state [ 162.742353][T10295] bridge0: port 1(bridge_slave_0) entered blocking state [ 162.749413][T10295] bridge0: port 1(bridge_slave_0) entered forwarding state [ 162.775406][T10295] 8021q: adding VLAN 0 to HW filter on device bond0 [ 162.786491][T10297] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 162.805378][T10297] bridge0: port 1(bridge_slave_0) entered disabled state [ 162.813367][T10297] bridge0: port 2(bridge_slave_1) entered disabled state [ 162.821320][T10297] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 162.832425][T10295] 8021q: adding VLAN 0 to HW filter on device team0 [ 162.842549][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 162.850929][ T3014] bridge0: port 1(bridge_slave_0) entered blocking state [ 162.858082][ T3014] bridge0: port 1(bridge_slave_0) entered forwarding state [ 162.867496][T10297] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 162.876316][T10297] bridge0: port 2(bridge_slave_1) entered blocking state [ 162.883425][T10297] bridge0: port 2(bridge_slave_1) entered forwarding state [ 162.902853][T10297] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 162.911328][T10297] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 162.920485][T10297] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready executing program [ 162.928854][T10297] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 162.937184][T10297] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 162.946191][T10295] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 162.960720][T10295] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 162.990990][ C0] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 268.151624][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 268.158509][ C1] rcu: 1-...!: (1 GPs behind) idle=80a/1/0x4000000000000002 softirq=9316/9317 fqs=2 [ 268.168442][ C1] (t=10501 jiffies g=10289 q=4) [ 268.173489][ C1] rcu: rcu_preempt kthread starved for 10498 jiffies! g10289 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 268.184914][ C1] rcu: RCU grace-period kthread stack dump: [ 268.191108][ C1] rcu_preempt R running task 29528 10 2 0x80004000 [ 268.199210][ C1] Call Trace: [ 268.202744][ C1] __schedule+0x755/0x15b0 [ 268.207277][ C1] ? __sched_text_start+0x8/0x8 [ 268.212262][ C1] schedule+0xa8/0x270 [ 268.216949][ C1] schedule_timeout+0x486/0xc50 [ 268.221932][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 268.227151][ C1] ? usleep_range+0x170/0x170 [ 268.232317][ C1] ? trace_hardirqs_on+0x67/0x240 [ 268.238142][ C1] ? __kasan_check_read+0x11/0x20 [ 268.243676][ C1] ? __next_timer_interrupt+0x1a0/0x1a0 [ 268.249707][ C1] ? swake_up_one+0x60/0x60 [ 268.254515][ C1] rcu_gp_kthread+0x9b2/0x18c0 [ 268.259587][ C1] ? rcu_barrier+0x310/0x310 [ 268.264284][ C1] ? trace_hardirqs_on+0x67/0x240 [ 268.269411][ C1] ? __kasan_check_read+0x11/0x20 [ 268.274720][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 268.281386][ C1] ? __kthread_parkme+0x108/0x1c0 [ 268.286449][ C1] ? __kasan_check_read+0x11/0x20 [ 268.291695][ C1] kthread+0x361/0x430 [ 268.295785][ C1] ? rcu_barrier+0x310/0x310 [ 268.300387][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 268.306809][ C1] ret_from_fork+0x24/0x30 [ 268.311598][ C1] NMI backtrace for cpu 1 [ 268.316454][ C1] CPU: 1 PID: 10295 Comm: syz-executor194 Not tainted 5.3.0-rc1-next-20190726 #53 [ 268.326057][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 268.336558][ C1] Call Trace: [ 268.339867][ C1] [ 268.342828][ C1] dump_stack+0x172/0x1f0 [ 268.347384][ C1] nmi_cpu_backtrace.cold+0x70/0xb2 [ 268.352685][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 268.359209][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 268.365034][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 268.371125][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 268.377411][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 268.382938][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 268.388660][ C1] ? raise_softirq+0x138/0x340 [ 268.393442][ C1] update_process_times+0x32/0x80 [ 268.398722][ C1] tick_sched_handle+0xa2/0x190 [ 268.403696][ C1] tick_sched_timer+0x53/0x140 [ 268.408484][ C1] __hrtimer_run_queues+0x364/0xe40 [ 268.413783][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 268.419532][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 268.425182][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 268.431091][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 268.437471][ C1] hrtimer_interrupt+0x314/0x770 [ 268.442537][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 268.448105][ C1] apic_timer_interrupt+0xf/0x20 [ 268.453055][ C1] RIP: 0010:native_queued_spin_lock_slowpath+0x132/0x9f0 [ 268.460247][ C1] Code: 00 00 00 48 8b 45 d0 65 48 33 04 25 28 00 00 00 0f 85 37 07 00 00 48 81 c4 98 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 f3 90 73 ff ff ff 8b 45 98 4c 8d 65 d8 3d 00 01 00 00 0f 84 e5 00 00 [ 268.479896][ C1] RSP: 0018:ffff8880ae909210 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 [ 268.488334][ C1] RAX: 0000000000000000 RBX: ffff88808dd88d08 RCX: ffffffff8159a3d7 [ 268.496325][ C1] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88808dd88d08 [ 268.504300][ C1] RBP: ffff8880ae9092d0 R08: 1ffff11011bb11a1 R09: ffffed1011bb11a2 [ 268.512313][ C1] R10: ffffed1011bb11a1 R11: ffff88808dd88d0b R12: 0000000000000001 [ 268.520283][ C1] R13: 0000000000000003 R14: ffffed1011bb11a1 R15: 0000000000000001 [ 268.528265][ C1] ? apic_timer_interrupt+0xa/0x20 [ 268.533380][ C1] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 268.539735][ C1] ? __pv_queued_spin_lock_slowpath+0xd10/0xd10 [ 268.545987][ C1] ? mark_held_locks+0xf0/0xf0 [ 268.550755][ C1] do_raw_spin_lock+0x20e/0x2e0 [ 268.555611][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 268.560722][ C1] ? lock_acquire+0x190/0x410 [ 268.565592][ C1] ? release_sock+0x20/0x1c0 [ 268.570192][ C1] ? __kasan_check_read+0x11/0x20 [ 268.575228][ C1] _raw_spin_lock_bh+0x3b/0x50 [ 268.580004][ C1] ? release_sock+0x20/0x1c0 [ 268.584608][ C1] release_sock+0x20/0x1c0 [ 268.590591][ C1] wait_on_pending_writer+0x20f/0x420 [ 268.596056][ C1] ? ip6_rcv_finish+0x1de/0x2f0 [ 268.600927][ C1] ? tls_init+0x560/0x560 [ 268.605338][ C1] ? process_backlog+0x206/0x750 [ 268.610295][ C1] ? net_rx_action+0x508/0x10c0 [ 268.615169][ C1] ? __do_softirq+0x262/0x98c [ 268.620905][ C1] ? prepare_to_wait_exclusive+0x320/0x320 [ 268.626824][ C1] ? inet_release+0xed/0x200 [ 268.631471][ C1] ? inet6_release+0x53/0x80 [ 268.636095][ C1] ? __sock_release+0xce/0x280 [ 268.640864][ C1] ? sock_close+0x1e/0x30 [ 268.645266][ C1] ? __fput+0x2ff/0x890 [ 268.649428][ C1] ? ____fput+0x16/0x20 [ 268.653587][ C1] ? task_work_run+0x145/0x1c0 [ 268.658467][ C1] ? exit_to_usermode_loop+0x316/0x380 [ 268.663931][ C1] tls_sk_proto_cleanup+0x2c5/0x3e0 [ 268.669144][ C1] ? wait_on_pending_writer+0x420/0x420 [ 268.674696][ C1] tls_sk_proto_unhash+0x90/0x3f0 [ 268.679778][ C1] tcp_set_state+0x5b9/0x7d0 [ 268.684373][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 268.690617][ C1] ? __sk_mem_reduce_allocated+0x1b0/0x560 [ 268.696919][ C1] ? tcp_alloc_md5sig_pool+0x4a0/0x4a0 [ 268.702386][ C1] ? __sk_mem_reclaim+0x55/0x70 [ 268.707253][ C1] ? tcp_write_queue_purge+0x5d8/0x1310 [ 268.712910][ C1] ? inet6_sk_rx_dst_set+0x244/0x6f0 [ 268.718214][ C1] tcp_done+0xe2/0x320 [ 268.722314][ C1] tcp_reset+0x132/0x500 [ 268.726576][ C1] tcp_validate_incoming+0xa2d/0x1660 [ 268.731955][ C1] tcp_rcv_established+0x6b5/0x1e70 [ 268.737154][ C1] ? mark_held_locks+0xf0/0xf0 [ 268.742007][ C1] ? sk_filter_trim_cap+0x45f/0xb30 [ 268.747208][ C1] ? tcp_data_queue+0x4860/0x4860 [ 268.752231][ C1] ? do_raw_spin_lock+0x12a/0x2e0 [ 268.757249][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 268.762186][ C1] ? lock_acquire+0x190/0x410 [ 268.766869][ C1] tcp_v6_do_rcv+0x41e/0x12c0 [ 268.771577][ C1] tcp_v6_rcv+0x31f1/0x3500 [ 268.776099][ C1] ? tcp_v6_syn_recv_sock+0x2290/0x2290 [ 268.781742][ C1] ? nf_confirm+0x360/0x4d0 [ 268.786431][ C1] ? mark_held_locks+0xf0/0xf0 [ 268.791199][ C1] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 268.796846][ C1] ip6_input_finish+0x84/0x170 [ 268.801613][ C1] ip6_input+0xe4/0x3f0 [ 268.805765][ C1] ? ip6_input_finish+0x170/0x170 [ 268.810805][ C1] ? __kasan_check_read+0x11/0x20 [ 268.815829][ C1] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 268.821738][ C1] ? lock_downgrade+0x920/0x920 [ 268.826613][ C1] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 268.832853][ C1] ip6_rcv_finish+0x1de/0x2f0 [ 268.837530][ C1] ipv6_rcv+0x10e/0x420 [ 268.841691][ C1] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 268.847149][ C1] ? lock_downgrade+0x920/0x920 [ 268.851997][ C1] ? lock_downgrade+0x920/0x920 [ 268.856864][ C1] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 268.862755][ C1] ? trace_hardirqs_off+0x62/0x240 [ 268.867859][ C1] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 268.873316][ C1] __netif_receive_skb_one_core+0x113/0x1a0 [ 268.879212][ C1] ? __netif_receive_skb_core+0x3060/0x3060 [ 268.885107][ C1] ? lock_acquire+0x190/0x410 [ 268.889783][ C1] ? process_backlog+0x195/0x750 [ 268.894720][ C1] __netif_receive_skb+0x2c/0x1d0 [ 268.899743][ C1] process_backlog+0x206/0x750 [ 268.904510][ C1] ? lock_acquire+0x190/0x410 [ 268.909189][ C1] ? clockevents_program_event+0x15a/0x370 [ 268.914995][ C1] net_rx_action+0x508/0x10c0 [ 268.919669][ C1] ? napi_complete_done+0x4b0/0x4b0 [ 268.924925][ C1] ? sched_clock+0x2e/0x50 [ 268.929370][ C1] ? kvm_clock_read+0x18/0x30 [ 268.934044][ C1] ? inet_csk_listen_stop+0x1bc/0x850 [ 268.940194][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 268.946433][ C1] __do_softirq+0x262/0x98c [ 268.950934][ C1] ? inet_csk_listen_stop+0x1bc/0x850 [ 268.956296][ C1] do_softirq_own_stack+0x2a/0x40 [ 268.961303][ C1] [ 268.964235][ C1] do_softirq.part.0+0x11a/0x170 [ 268.969270][ C1] __local_bh_enable_ip+0x211/0x270 [ 268.974463][ C1] inet_csk_listen_stop+0x1e0/0x850 [ 268.979679][ C1] tcp_close+0xd5b/0x10e0 [ 268.984010][ C1] ? ip_mc_drop_socket+0x211/0x270 [ 268.989114][ C1] ? down_write+0xdf/0x150 [ 268.993529][ C1] inet_release+0xed/0x200 [ 268.997944][ C1] inet6_release+0x53/0x80 [ 269.002361][ C1] __sock_release+0xce/0x280 [ 269.006946][ C1] sock_close+0x1e/0x30 [ 269.011097][ C1] __fput+0x2ff/0x890 [ 269.015071][ C1] ? __sock_release+0x280/0x280 [ 269.019917][ C1] ____fput+0x16/0x20 [ 269.023891][ C1] task_work_run+0x145/0x1c0 [ 269.028485][ C1] exit_to_usermode_loop+0x316/0x380 [ 269.033764][ C1] do_syscall_64+0x65f/0x760 [ 269.038348][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 269.044233][ C1] RIP: 0033:0x406571 [ 269.048132][ C1] 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 [ 269.067737][ C1] RSP: 002b:00007ffdc229edd0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 269.076160][ C1] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000406571 [ 269.084131][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 269.092105][ C1] RBP: 00000000006dcc20 R08: 0000000000000140 R09: 0000000000000140 [ 269.100063][ C1] R10: 00007ffdc229ee00 R11: 0000000000000293 R12: 00007ffdc229ee30 [ 269.108025][ C1] R13: 00000000006dcc2c R14: 000000000000002d R15: 0000000000000007