[ 69.756161][ T26] audit: type=1800 audit(1564552996.321:27): pid=9846 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 69.786107][ T26] audit: type=1800 audit(1564552996.331:28): pid=9846 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. [ 70.449559][ T26] audit: type=1800 audit(1564552997.081:29): pid=9846 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 [ 70.471156][ T26] audit: type=1800 audit(1564552997.081:30): pid=9846 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 '10.128.0.243' (ECDSA) to the list of known hosts. syzkaller login: [ 195.725327][ T9998] IPVS: ftp: loaded support on port[0] = 21 [ 195.768307][ T9998] chnl_net:caif_netlink_parms(): no params data found [ 195.790226][ T9998] bridge0: port 1(bridge_slave_0) entered blocking state [ 195.797805][ T9998] bridge0: port 1(bridge_slave_0) entered disabled state [ 195.805706][ T9998] device bridge_slave_0 entered promiscuous mode [ 195.813283][ T9998] bridge0: port 2(bridge_slave_1) entered blocking state [ 195.820704][ T9998] bridge0: port 2(bridge_slave_1) entered disabled state [ 195.828872][ T9998] device bridge_slave_1 entered promiscuous mode [ 195.842098][ T9998] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 195.852488][ T9998] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 195.867861][ T9998] team0: Port device team_slave_0 added [ 195.874696][ T9998] team0: Port device team_slave_1 added [ 195.947914][ T9998] device hsr_slave_0 entered promiscuous mode [ 195.986435][ T9998] device hsr_slave_1 entered promiscuous mode [ 196.031505][ T9998] bridge0: port 2(bridge_slave_1) entered blocking state [ 196.038980][ T9998] bridge0: port 2(bridge_slave_1) entered forwarding state [ 196.046709][ T9998] bridge0: port 1(bridge_slave_0) entered blocking state [ 196.053972][ T9998] bridge0: port 1(bridge_slave_0) entered forwarding state [ 196.078864][ T9998] 8021q: adding VLAN 0 to HW filter on device bond0 [ 196.090216][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 196.099060][ T22] bridge0: port 1(bridge_slave_0) entered disabled state [ 196.107446][ T22] bridge0: port 2(bridge_slave_1) entered disabled state [ 196.115524][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 196.125942][ T9998] 8021q: adding VLAN 0 to HW filter on device team0 [ 196.136693][ T2979] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 196.147103][ T2979] bridge0: port 1(bridge_slave_0) entered blocking state [ 196.154437][ T2979] bridge0: port 1(bridge_slave_0) entered forwarding state [ 196.167058][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 196.176639][ T22] bridge0: port 2(bridge_slave_1) entered blocking state [ 196.183790][ T22] bridge0: port 2(bridge_slave_1) entered forwarding state [ 196.200858][ T9998] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 196.213741][ T9998] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 196.229537][ T2979] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 196.239319][ T2979] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 196.247850][ T2979] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 196.256609][ T2979] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 196.266710][ T2979] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 196.275265][ T2979] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready executing program [ 196.289985][ T9998] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 196.319120][ C1] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 301.476042][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 301.482786][ C0] rcu: 0-...!: (10499 ticks this GP) idle=02e/1/0x4000000000000002 softirq=9571/9571 fqs=2 [ 301.493197][ C0] (t=10501 jiffies g=9765 q=4) [ 301.498068][ C0] rcu: rcu_preempt kthread starved for 10498 jiffies! g9765 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 301.509227][ C0] rcu: RCU grace-period kthread stack dump: [ 301.515094][ C0] rcu_preempt R running task 29528 10 2 0x80004000 [ 301.523238][ C0] Call Trace: [ 301.526518][ C0] __schedule+0x755/0x15b0 [ 301.531004][ C0] ? __sched_text_start+0x8/0x8 [ 301.535951][ C0] schedule+0xa8/0x270 [ 301.540096][ C0] schedule_timeout+0x486/0xc50 [ 301.544941][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 301.549866][ C0] ? usleep_range+0x170/0x170 [ 301.554581][ C0] ? trace_hardirqs_on+0x67/0x240 [ 301.559668][ C0] ? __kasan_check_read+0x11/0x20 [ 301.564672][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 301.570196][ C0] ? swake_up_one+0x60/0x60 [ 301.574768][ C0] rcu_gp_kthread+0x9b2/0x18c0 [ 301.579597][ C0] ? rcu_barrier+0x310/0x310 [ 301.584167][ C0] ? trace_hardirqs_on+0x67/0x240 [ 301.589168][ C0] ? __kasan_check_read+0x11/0x20 [ 301.594259][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 301.600612][ C0] ? __kthread_parkme+0x108/0x1c0 [ 301.605700][ C0] ? __kasan_check_read+0x11/0x20 [ 301.610707][ C0] kthread+0x361/0x430 [ 301.614760][ C0] ? rcu_barrier+0x310/0x310 [ 301.619675][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 301.627027][ C0] ret_from_fork+0x24/0x30 [ 301.631584][ C0] NMI backtrace for cpu 0 [ 301.635898][ C0] CPU: 0 PID: 9998 Comm: syz-executor428 Not tainted 5.3.0-rc2-next-20190730 #55 [ 301.645018][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 301.655052][ C0] Call Trace: [ 301.658315][ C0] [ 301.661157][ C0] dump_stack+0x172/0x1f0 [ 301.665467][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 301.670644][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 301.676864][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 301.682565][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 301.688631][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 301.698771][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 301.703871][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 301.709482][ C0] ? raise_softirq+0x138/0x340 [ 301.714226][ C0] update_process_times+0x32/0x80 [ 301.719336][ C0] tick_sched_handle+0xa2/0x190 [ 301.724172][ C0] tick_sched_timer+0x53/0x140 [ 301.728916][ C0] __hrtimer_run_queues+0x364/0xe40 [ 301.734180][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 301.739455][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 301.744977][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 301.750674][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 301.756740][ C0] hrtimer_interrupt+0x314/0x770 [ 301.761761][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 301.767290][ C0] apic_timer_interrupt+0xf/0x20 [ 301.772219][ C0] RIP: 0010:native_queued_spin_lock_slowpath+0x132/0x9f0 [ 301.779325][ C0] 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 [ 301.799349][ C0] RSP: 0018:ffff8880ae809210 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 [ 301.807738][ C0] RAX: 0000000000000000 RBX: ffff88808f81ed08 RCX: ffffffff8158f237 [ 301.815689][ C0] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88808f81ed08 [ 301.823811][ C0] RBP: ffff8880ae8092d0 R08: 1ffff11011f03da1 R09: ffffed1011f03da2 [ 301.831761][ C0] R10: ffffed1011f03da1 R11: ffff88808f81ed0b R12: 0000000000000001 [ 301.839719][ C0] R13: 0000000000000003 R14: ffffed1011f03da1 R15: 0000000000000001 [ 301.847678][ C0] ? apic_timer_interrupt+0xa/0x20 [ 301.852783][ C0] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 301.859098][ C0] ? __pv_queued_spin_lock_slowpath+0xd10/0xd10 [ 301.865316][ C0] ? mark_held_locks+0xf0/0xf0 [ 301.870061][ C0] do_raw_spin_lock+0x20e/0x2e0 [ 301.874983][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 301.879986][ C0] ? lock_acquire+0x190/0x410 [ 301.884666][ C0] ? release_sock+0x20/0x1c0 [ 301.889247][ C0] ? __kasan_check_read+0x11/0x20 [ 301.894342][ C0] _raw_spin_lock_bh+0x3b/0x50 [ 301.899172][ C0] ? release_sock+0x20/0x1c0 [ 301.903752][ C0] release_sock+0x20/0x1c0 [ 301.908322][ C0] wait_on_pending_writer+0x20f/0x420 [ 301.913697][ C0] ? ip6_rcv_finish+0x1de/0x2f0 [ 301.918527][ C0] ? tls_init+0x560/0x560 [ 301.922865][ C0] ? process_backlog+0x206/0x750 [ 301.927783][ C0] ? net_rx_action+0x508/0x10c0 [ 301.932610][ C0] ? __do_softirq+0x262/0x98c [ 301.937263][ C0] ? prepare_to_wait_exclusive+0x320/0x320 [ 301.943144][ C0] ? inet_release+0xed/0x200 [ 301.947816][ C0] ? inet6_release+0x53/0x80 [ 301.952384][ C0] ? __sock_release+0xce/0x280 [ 301.957126][ C0] ? sock_close+0x1e/0x30 [ 301.961527][ C0] ? __fput+0x2ff/0x890 [ 301.965659][ C0] ? ____fput+0x16/0x20 [ 301.969810][ C0] ? task_work_run+0x145/0x1c0 [ 301.974814][ C0] ? exit_to_usermode_loop+0x316/0x380 [ 301.980256][ C0] tls_sk_proto_cleanup+0x2c5/0x3e0 [ 301.985434][ C0] ? wait_on_pending_writer+0x420/0x420 [ 301.990964][ C0] tls_sk_proto_unhash+0x90/0x3f0 [ 301.995985][ C0] tcp_set_state+0x5b9/0x7d0 [ 302.000557][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 302.006782][ C0] ? __sk_mem_reduce_allocated+0x1b0/0x560 [ 302.012676][ C0] ? tcp_alloc_md5sig_pool+0x4a0/0x4a0 [ 302.018285][ C0] ? __sk_mem_reclaim+0x55/0x70 [ 302.023113][ C0] ? tcp_write_queue_purge+0x5d8/0x1310 [ 302.028650][ C0] ? inet6_sk_rx_dst_set+0x244/0x6f0 [ 302.033921][ C0] tcp_done+0xe2/0x320 [ 302.038261][ C0] tcp_reset+0x132/0x500 [ 302.042503][ C0] tcp_validate_incoming+0xa2d/0x1660 [ 302.048025][ C0] tcp_rcv_established+0x6b5/0x1e70 [ 302.053293][ C0] ? mark_held_locks+0xf0/0xf0 [ 302.058037][ C0] ? sk_filter_trim_cap+0x45f/0xb30 [ 302.063213][ C0] ? tcp_data_queue+0x4860/0x4860 [ 302.068213][ C0] ? do_raw_spin_lock+0x12a/0x2e0 [ 302.073217][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 302.078137][ C0] ? lock_acquire+0x190/0x410 [ 302.082883][ C0] tcp_v6_do_rcv+0x41e/0x12c0 [ 302.087539][ C0] tcp_v6_rcv+0x31f1/0x3500 [ 302.092027][ C0] ? tcp_v6_syn_recv_sock+0x2290/0x2290 [ 302.097552][ C0] ? nf_confirm+0x360/0x4d0 [ 302.102041][ C0] ? mark_held_locks+0xf0/0xf0 [ 302.107047][ C0] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 302.112663][ C0] ip6_input_finish+0x84/0x170 [ 302.117498][ C0] ip6_input+0xe4/0x3f0 [ 302.121632][ C0] ? ip6_input_finish+0x170/0x170 [ 302.126634][ C0] ? __kasan_check_read+0x11/0x20 [ 302.131727][ C0] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 302.137600][ C0] ? lock_downgrade+0x920/0x920 [ 302.142439][ C0] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 302.148662][ C0] ip6_rcv_finish+0x1de/0x2f0 [ 302.153424][ C0] ipv6_rcv+0x10e/0x420 [ 302.157559][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 302.162995][ C0] ? lock_downgrade+0x920/0x920 [ 302.168021][ C0] ? lock_downgrade+0x920/0x920 [ 302.173041][ C0] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 302.179002][ C0] ? trace_hardirqs_off+0x62/0x240 [ 302.184266][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 302.189976][ C0] __netif_receive_skb_one_core+0x113/0x1a0 [ 302.195847][ C0] ? __netif_receive_skb_core+0x3060/0x3060 [ 302.201718][ C0] ? lock_acquire+0x190/0x410 [ 302.206371][ C0] ? process_backlog+0x195/0x750 [ 302.211285][ C0] __netif_receive_skb+0x2c/0x1d0 [ 302.216384][ C0] process_backlog+0x206/0x750 [ 302.221127][ C0] ? lock_acquire+0x190/0x410 [ 302.225788][ C0] ? clockevents_program_event+0x15a/0x370 [ 302.231665][ C0] net_rx_action+0x508/0x10c0 [ 302.236412][ C0] ? napi_complete_done+0x4b0/0x4b0 [ 302.241587][ C0] ? sched_clock+0x2e/0x50 [ 302.246067][ C0] ? kvm_clock_read+0x18/0x30 [ 302.250722][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 302.256071][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 302.262291][ C0] __do_softirq+0x262/0x98c [ 302.266788][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 302.272152][ C0] do_softirq_own_stack+0x2a/0x40 [ 302.277253][ C0] [ 302.280172][ C0] do_softirq.part.0+0x11a/0x170 [ 302.285087][ C0] __local_bh_enable_ip+0x211/0x270 [ 302.290627][ C0] inet_csk_listen_stop+0x1e0/0x850 [ 302.295816][ C0] tcp_close+0xd5b/0x10e0 [ 302.300280][ C0] ? ip_mc_drop_socket+0x211/0x270 [ 302.305433][ C0] ? down_write+0xdf/0x150 [ 302.309913][ C0] inet_release+0xed/0x200 [ 302.314317][ C0] inet6_release+0x53/0x80 [ 302.318714][ C0] __sock_release+0xce/0x280 [ 302.323405][ C0] sock_close+0x1e/0x30 [ 302.327542][ C0] __fput+0x2ff/0x890 [ 302.331520][ C0] ? __sock_release+0x280/0x280 [ 302.336352][ C0] ____fput+0x16/0x20 [ 302.340488][ C0] task_work_run+0x145/0x1c0 [ 302.345556][ C0] exit_to_usermode_loop+0x316/0x380 [ 302.350829][ C0] do_syscall_64+0x65f/0x760 [ 302.355417][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 302.361299][ C0] RIP: 0033:0x406571 [ 302.365187][ 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 [ 302.384861][ C0] RSP: 002b:00007ffd182fb270 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 302.393246][ C0] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000406571 [ 302.401461][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 302.409417][ C0] RBP: 00000000006dcc20 R08: 0000000000000140 R09: 0000000000000140 [ 302.417366][ C0] R10: 00007ffd182fb2a0 R11: 0000000000000293 R12: 00007ffd182fb2d0 [ 302.425497][ C0] R13: 00000000006dcc2c R14: 000000000000002d R15: 0000000000000007