[ 64.822227][ T27] audit: type=1800 audit(1564829874.698:27): pid=9860 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 64.859520][ T27] audit: type=1800 audit(1564829874.698:28): pid=9860 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. [ 65.389475][ T27] audit: type=1800 audit(1564829875.348:29): pid=9860 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 [ 65.409793][ T27] audit: type=1800 audit(1564829875.348:30): pid=9860 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 '10.128.0.147' (ECDSA) to the list of known hosts. syzkaller login: [ 188.925522][T10013] IPVS: ftp: loaded support on port[0] = 21 [ 188.969932][T10013] chnl_net:caif_netlink_parms(): no params data found [ 188.992020][T10013] bridge0: port 1(bridge_slave_0) entered blocking state [ 188.999274][T10013] bridge0: port 1(bridge_slave_0) entered disabled state [ 189.006861][T10013] device bridge_slave_0 entered promiscuous mode [ 189.014299][T10013] bridge0: port 2(bridge_slave_1) entered blocking state [ 189.021561][T10013] bridge0: port 2(bridge_slave_1) entered disabled state [ 189.029147][T10013] device bridge_slave_1 entered promiscuous mode [ 189.043487][T10013] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 189.053975][T10013] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 189.070187][T10013] team0: Port device team_slave_0 added [ 189.077171][T10013] team0: Port device team_slave_1 added [ 189.146752][T10013] device hsr_slave_0 entered promiscuous mode [ 189.215184][T10013] device hsr_slave_1 entered promiscuous mode [ 189.260248][T10013] bridge0: port 2(bridge_slave_1) entered blocking state [ 189.267343][T10013] bridge0: port 2(bridge_slave_1) entered forwarding state [ 189.274609][T10013] bridge0: port 1(bridge_slave_0) entered blocking state [ 189.281700][T10013] bridge0: port 1(bridge_slave_0) entered forwarding state [ 189.307946][T10013] 8021q: adding VLAN 0 to HW filter on device bond0 [ 189.318728][ T2948] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 189.336798][ T2948] bridge0: port 1(bridge_slave_0) entered disabled state [ 189.344246][ T2948] bridge0: port 2(bridge_slave_1) entered disabled state [ 189.351949][ T2948] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 189.362032][T10013] 8021q: adding VLAN 0 to HW filter on device team0 [ 189.370829][ T3581] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 189.379436][ T3581] bridge0: port 1(bridge_slave_0) entered blocking state [ 189.386517][ T3581] bridge0: port 1(bridge_slave_0) entered forwarding state [ 189.405372][ T2948] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 189.413659][ T2948] bridge0: port 2(bridge_slave_1) entered blocking state [ 189.420754][ T2948] bridge0: port 2(bridge_slave_1) entered forwarding state [ 189.428543][ T2948] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 189.436931][ T2948] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 189.445290][ T2948] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 189.453666][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready executing program [ 189.463299][ T3581] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 189.473081][T10013] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 189.487843][T10013] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 189.517018][ C0] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 294.684866][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 294.691591][ C1] rcu: 1-...!: (1 GPs behind) idle=6a6/1/0x4000000000000002 softirq=10090/10091 fqs=2 [ 294.701291][ C1] (t=10500 jiffies g=9913 q=6) [ 294.706135][ C1] rcu: rcu_preempt kthread starved for 10496 jiffies! g9913 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 [ 294.717392][ C1] rcu: RCU grace-period kthread stack dump: [ 294.723266][ C1] rcu_preempt I29392 10 2 0x80004000 [ 294.729593][ C1] Call Trace: [ 294.732949][ C1] __schedule+0x755/0x15b0 [ 294.737366][ C1] ? __sched_text_start+0x8/0x8 [ 294.742210][ C1] schedule+0xa8/0x270 [ 294.746272][ C1] schedule_timeout+0x486/0xc50 [ 294.751137][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 294.756063][ C1] ? usleep_range+0x170/0x170 [ 294.760729][ C1] ? trace_hardirqs_on+0x67/0x240 [ 294.766199][ C1] ? __kasan_check_read+0x11/0x20 [ 294.771216][ C1] ? __next_timer_interrupt+0x1a0/0x1a0 [ 294.776756][ C1] ? swake_up_one+0x60/0x60 [ 294.781252][ C1] rcu_gp_kthread+0x9b2/0x18c0 [ 294.786010][ C1] ? rcu_barrier+0x310/0x310 [ 294.790588][ C1] ? trace_hardirqs_on+0x67/0x240 [ 294.795601][ C1] ? __kasan_check_read+0x11/0x20 [ 294.800619][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 294.806850][ C1] ? __kthread_parkme+0x108/0x1c0 [ 294.811860][ C1] ? __kasan_check_read+0x11/0x20 [ 294.816872][ C1] kthread+0x361/0x430 [ 294.820930][ C1] ? rcu_barrier+0x310/0x310 [ 294.825510][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 294.831741][ C1] ret_from_fork+0x24/0x30 [ 294.836241][ C1] NMI backtrace for cpu 1 [ 294.840589][ C1] CPU: 1 PID: 10013 Comm: syz-executor092 Not tainted 5.3.0-rc2-next-20190802 #58 [ 294.849801][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 294.859845][ C1] Call Trace: [ 294.863125][ C1] [ 294.866023][ C1] dump_stack+0x172/0x1f0 [ 294.870352][ C1] nmi_cpu_backtrace.cold+0x70/0xb2 [ 294.875540][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 294.881779][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 294.887422][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 294.893394][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 294.899277][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 294.904381][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 294.909918][ C1] ? raise_softirq+0x138/0x340 [ 294.914677][ C1] update_process_times+0x32/0x80 [ 294.919696][ C1] tick_sched_handle+0xa2/0x190 [ 294.924533][ C1] tick_sched_timer+0x53/0x140 [ 294.929289][ C1] __hrtimer_run_queues+0x364/0xe40 [ 294.934496][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 294.939775][ C1] ? hrtimer_sleeper_start_expires+0x90/0x90 [ 294.945746][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 294.951455][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 294.957517][ C1] hrtimer_interrupt+0x314/0x770 [ 294.962453][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 294.967990][ C1] apic_timer_interrupt+0xf/0x20 [ 294.972918][ C1] RIP: 0010:native_queued_spin_lock_slowpath+0xaa/0x9f0 [ 294.979848][ C1] Code: 0f 1f 44 00 00 49 89 fe 49 89 fd 41 bc 01 00 00 00 49 c1 ee 03 41 83 e5 07 48 b8 00 00 00 00 00 fc ff df 49 01 c6 41 83 c5 03 04 00 00 00 48 89 df e8 f9 fc 53 00 41 0f b6 06 41 38 c5 7c 08 [ 294.999456][ C1] RSP: 0018:ffff8880ae909210 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 [ 295.007855][ C1] RAX: 0000000000000000 RBX: ffff8880908f2d08 RCX: ffffffff8158f457 [ 295.015815][ C1] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880908f2d08 [ 295.023772][ C1] RBP: ffff8880ae9092d0 R08: 1ffff1101211e5a1 R09: ffffed101211e5a2 [ 295.031732][ C1] R10: ffffed101211e5a1 R11: ffff8880908f2d0b R12: 0000000000000001 [ 295.039690][ C1] R13: 0000000000000003 R14: ffffed101211e5a1 R15: 0000000000000001 [ 295.047662][ C1] ? apic_timer_interrupt+0xa/0x20 [ 295.052769][ C1] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 295.059098][ C1] ? __pv_queued_spin_lock_slowpath+0xd10/0xd10 [ 295.065327][ C1] ? mark_held_locks+0xf0/0xf0 [ 295.070081][ C1] do_raw_spin_lock+0x20e/0x2e0 [ 295.074923][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 295.079853][ C1] ? lock_acquire+0x190/0x410 [ 295.084570][ C1] ? release_sock+0x20/0x1c0 [ 295.089155][ C1] ? __kasan_check_read+0x11/0x20 [ 295.094171][ C1] _raw_spin_lock_bh+0x3b/0x50 [ 295.098924][ C1] ? release_sock+0x20/0x1c0 [ 295.103501][ C1] release_sock+0x20/0x1c0 [ 295.107968][ C1] wait_on_pending_writer+0x20f/0x420 [ 295.113370][ C1] ? ip6_rcv_finish+0x1de/0x2f0 [ 295.118211][ C1] ? tls_init+0x560/0x560 [ 295.122554][ C1] ? process_backlog+0x206/0x750 [ 295.127478][ C1] ? net_rx_action+0x508/0x10c0 [ 295.132321][ C1] ? __do_softirq+0x262/0x98c [ 295.136996][ C1] ? prepare_to_wait_exclusive+0x320/0x320 [ 295.142847][ C1] ? inet_release+0xed/0x200 [ 295.147452][ C1] ? inet6_release+0x53/0x80 [ 295.152073][ C1] ? __sock_release+0xce/0x280 [ 295.156826][ C1] ? sock_close+0x1e/0x30 [ 295.161149][ C1] ? __fput+0x2ff/0x890 [ 295.165291][ C1] ? ____fput+0x16/0x20 [ 295.169436][ C1] ? task_work_run+0x145/0x1c0 [ 295.174189][ C1] ? exit_to_usermode_loop+0x316/0x380 [ 295.179639][ C1] tls_sk_proto_cleanup+0x2c5/0x3e0 [ 295.184833][ C1] ? wait_on_pending_writer+0x420/0x420 [ 295.190371][ C1] tls_sk_proto_unhash+0x90/0x3f0 [ 295.195439][ C1] tcp_set_state+0x5b9/0x7d0 [ 295.200044][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 295.206272][ C1] ? __sk_mem_reduce_allocated+0x1b0/0x560 [ 295.212066][ C1] ? tcp_alloc_md5sig_pool+0x4a0/0x4a0 [ 295.217516][ C1] ? __sk_mem_reclaim+0x55/0x70 [ 295.222354][ C1] ? tcp_write_queue_purge+0x5d8/0x1310 [ 295.227932][ C1] ? inet6_sk_rx_dst_set+0x244/0x6f0 [ 295.233212][ C1] tcp_done+0xe2/0x320 [ 295.237271][ C1] tcp_reset+0x132/0x500 [ 295.241506][ C1] tcp_validate_incoming+0xa2d/0x1660 [ 295.246871][ C1] tcp_rcv_established+0x6b5/0x1e70 [ 295.252059][ C1] ? mark_held_locks+0xf0/0xf0 [ 295.256874][ C1] ? sk_filter_trim_cap+0x45f/0xb30 [ 295.262068][ C1] ? tcp_data_queue+0x4860/0x4860 [ 295.267096][ C1] ? do_raw_spin_lock+0x12a/0x2e0 [ 295.272111][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 295.277038][ C1] ? lock_acquire+0x190/0x410 [ 295.281710][ C1] tcp_v6_do_rcv+0x41e/0x12c0 [ 295.286378][ C1] tcp_v6_rcv+0x31f1/0x3500 [ 295.290884][ C1] ? tcp_v6_syn_recv_sock+0x2290/0x2290 [ 295.296474][ C1] ? nf_confirm+0x360/0x4d0 [ 295.300969][ C1] ? mark_held_locks+0xf0/0xf0 [ 295.305725][ C1] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 295.311351][ C1] ip6_input_finish+0x84/0x170 [ 295.316104][ C1] ip6_input+0xe4/0x3f0 [ 295.320268][ C1] ? ip6_input_finish+0x170/0x170 [ 295.325278][ C1] ? __kasan_check_read+0x11/0x20 [ 295.330293][ C1] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 295.336179][ C1] ? lock_downgrade+0x920/0x920 [ 295.341019][ C1] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 295.347247][ C1] ip6_rcv_finish+0x1de/0x2f0 [ 295.351913][ C1] ipv6_rcv+0x10e/0x420 [ 295.356057][ C1] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 295.361504][ C1] ? lock_downgrade+0x920/0x920 [ 295.366340][ C1] ? lock_downgrade+0x920/0x920 [ 295.371179][ C1] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 295.377060][ C1] ? trace_hardirqs_off+0x62/0x240 [ 295.382159][ C1] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 295.387605][ C1] __netif_receive_skb_one_core+0x113/0x1a0 [ 295.393487][ C1] ? __netif_receive_skb_core+0x3060/0x3060 [ 295.399373][ C1] ? lock_acquire+0x190/0x410 [ 295.404036][ C1] ? process_backlog+0x195/0x750 [ 295.408963][ C1] __netif_receive_skb+0x2c/0x1d0 [ 295.413976][ C1] process_backlog+0x206/0x750 [ 295.418724][ C1] ? lock_acquire+0x190/0x410 [ 295.423394][ C1] ? clockevents_program_event+0x15a/0x370 [ 295.429190][ C1] net_rx_action+0x508/0x10c0 [ 295.433868][ C1] ? napi_complete_done+0x4b0/0x4b0 [ 295.439053][ C1] ? sched_clock+0x2e/0x50 [ 295.443564][ C1] ? kvm_clock_read+0x18/0x30 [ 295.448298][ C1] ? inet_csk_listen_stop+0x1bc/0x850 [ 295.453664][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 295.459896][ C1] __do_softirq+0x262/0x98c [ 295.464394][ C1] ? inet_csk_listen_stop+0x1bc/0x850 [ 295.469759][ C1] do_softirq_own_stack+0x2a/0x40 [ 295.474767][ C1] [ 295.477744][ C1] do_softirq.part.0+0x11a/0x170 [ 295.482667][ C1] __local_bh_enable_ip+0x211/0x270 [ 295.487856][ C1] inet_csk_listen_stop+0x1e0/0x850 [ 295.493045][ C1] tcp_close+0xd5b/0x10e0 [ 295.497366][ C1] ? ip_mc_drop_socket+0x211/0x270 [ 295.502463][ C1] ? down_write+0xdf/0x150 [ 295.506872][ C1] inet_release+0xed/0x200 [ 295.511280][ C1] inet6_release+0x53/0x80 [ 295.515687][ C1] __sock_release+0xce/0x280 [ 295.520267][ C1] sock_close+0x1e/0x30 [ 295.524409][ C1] __fput+0x2ff/0x890 [ 295.528385][ C1] ? __sock_release+0x280/0x280 [ 295.533224][ C1] ____fput+0x16/0x20 [ 295.537207][ C1] task_work_run+0x145/0x1c0 [ 295.541792][ C1] exit_to_usermode_loop+0x316/0x380 [ 295.547073][ C1] do_syscall_64+0x65f/0x760 [ 295.551655][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 295.557534][ C1] RIP: 0033:0x406571 [ 295.561424][ 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 [ 295.581016][ C1] RSP: 002b:00007fffd7032820 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 295.589415][ C1] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000406571 [ 295.597376][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 295.605334][ C1] RBP: 00000000006dcc20 R08: 0000000000000140 R09: 0000000000000140 [ 295.613291][ C1] R10: 00007fffd7032850 R11: 0000000000000293 R12: 00007fffd7032880 [ 295.621263][ C1] R13: 00000000006dcc2c R14: 000000000000002d R15: 0000000000000007