[ 71.294160][ T26] audit: type=1800 audit(1564337864.704:27): pid=9971 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 71.314795][ T26] audit: type=1800 audit(1564337864.704:28): pid=9971 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. [ 71.955831][ T26] audit: type=1800 audit(1564337865.434:29): pid=9971 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 [ 71.980026][ T26] audit: type=1800 audit(1564337865.434:30): pid=9971 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 '10.128.1.9' (ECDSA) to the list of known hosts. syzkaller login: [ 167.538929][T10124] IPVS: ftp: loaded support on port[0] = 21 [ 167.580440][T10124] chnl_net:caif_netlink_parms(): no params data found [ 167.601781][T10124] bridge0: port 1(bridge_slave_0) entered blocking state [ 167.608933][T10124] bridge0: port 1(bridge_slave_0) entered disabled state [ 167.616748][T10124] device bridge_slave_0 entered promiscuous mode [ 167.624171][T10124] bridge0: port 2(bridge_slave_1) entered blocking state [ 167.631366][T10124] bridge0: port 2(bridge_slave_1) entered disabled state [ 167.639043][T10124] device bridge_slave_1 entered promiscuous mode [ 167.653971][T10124] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 167.664346][T10124] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 167.680153][T10124] team0: Port device team_slave_0 added [ 167.686950][T10124] team0: Port device team_slave_1 added [ 167.732969][T10124] device hsr_slave_0 entered promiscuous mode [ 167.771324][T10124] device hsr_slave_1 entered promiscuous mode [ 167.816706][T10124] bridge0: port 2(bridge_slave_1) entered blocking state [ 167.823851][T10124] bridge0: port 2(bridge_slave_1) entered forwarding state [ 167.831217][T10124] bridge0: port 1(bridge_slave_0) entered blocking state [ 167.838271][T10124] bridge0: port 1(bridge_slave_0) entered forwarding state [ 167.864461][T10124] 8021q: adding VLAN 0 to HW filter on device bond0 [ 167.876963][T10124] 8021q: adding VLAN 0 to HW filter on device team0 [ 167.884481][ T3516] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 167.892774][ T3516] bridge0: port 1(bridge_slave_0) entered disabled state [ 167.900762][ T3516] bridge0: port 2(bridge_slave_1) entered disabled state [ 167.908592][ T3516] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 167.921984][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 167.930250][ T22] bridge0: port 1(bridge_slave_0) entered blocking state [ 167.937335][ T22] bridge0: port 1(bridge_slave_0) entered forwarding state [ 167.945055][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 167.953415][ T22] bridge0: port 2(bridge_slave_1) entered blocking state [ 167.960439][ T22] bridge0: port 2(bridge_slave_1) entered forwarding state [ 167.973467][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 167.982529][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 167.993792][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 168.006191][T10124] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 168.017574][T10124] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 168.033670][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 168.048106][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 168.058825][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 168.077749][T10124] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 168.126512][ C0] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 273.310943][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 273.317602][ C1] rcu: 1-...!: (1 GPs behind) idle=a0e/1/0x4000000000000002 softirq=9618/9619 fqs=2 [ 273.327133][ C1] (t=10500 jiffies g=10217 q=6) [ 273.332072][ C1] rcu: rcu_preempt kthread starved for 10496 jiffies! g10217 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 [ 273.343423][ C1] rcu: RCU grace-period kthread stack dump: [ 273.349309][ C1] rcu_preempt I29528 10 2 0x80004000 [ 273.355641][ C1] Call Trace: [ 273.358968][ C1] __schedule+0x755/0x15b0 [ 273.363390][ C1] ? __sched_text_start+0x8/0x8 [ 273.368268][ C1] schedule+0xa8/0x270 [ 273.372337][ C1] schedule_timeout+0x486/0xc50 [ 273.377186][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 273.382121][ C1] ? usleep_range+0x170/0x170 [ 273.386789][ C1] ? trace_hardirqs_on+0x67/0x240 [ 273.391814][ C1] ? __kasan_check_read+0x11/0x20 [ 273.396841][ C1] ? __next_timer_interrupt+0x1a0/0x1a0 [ 273.402393][ C1] ? swake_up_one+0x60/0x60 [ 273.406906][ C1] rcu_gp_kthread+0x9b2/0x18c0 [ 273.411682][ C1] ? rcu_barrier+0x310/0x310 [ 273.416266][ C1] ? trace_hardirqs_on+0x67/0x240 [ 273.421288][ C1] ? __kasan_check_read+0x11/0x20 [ 273.426308][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 273.432541][ C1] ? __kthread_parkme+0x108/0x1c0 [ 273.437577][ C1] ? __kasan_check_read+0x11/0x20 [ 273.442610][ C1] kthread+0x361/0x430 [ 273.446902][ C1] ? rcu_barrier+0x310/0x310 [ 273.451856][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 273.458147][ C1] ret_from_fork+0x24/0x30 [ 273.462819][ C1] NMI backtrace for cpu 1 [ 273.467166][ C1] CPU: 1 PID: 10124 Comm: syz-executor014 Not tainted 5.3.0-rc1-next-20190726 #53 [ 273.476860][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 273.488607][ C1] Call Trace: [ 273.492357][ C1] [ 273.495586][ C1] dump_stack+0x172/0x1f0 [ 273.500130][ C1] nmi_cpu_backtrace.cold+0x70/0xb2 [ 273.505539][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 273.512863][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 273.518613][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 273.524786][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 273.530726][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 273.535851][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 273.541417][ C1] ? raise_softirq+0x138/0x340 [ 273.546193][ C1] update_process_times+0x32/0x80 [ 273.551221][ C1] tick_sched_handle+0xa2/0x190 [ 273.556079][ C1] tick_sched_timer+0x53/0x140 [ 273.560848][ C1] __hrtimer_run_queues+0x364/0xe40 [ 273.566054][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 273.571364][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 273.576918][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 273.582634][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 273.588701][ C1] hrtimer_interrupt+0x314/0x770 [ 273.593653][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 273.599201][ C1] apic_timer_interrupt+0xf/0x20 [ 273.604140][ C1] RIP: 0010:native_queued_spin_lock_slowpath+0x132/0x9f0 [ 273.611249][ 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 [ 273.630879][ C1] RSP: 0018:ffff8880ae909210 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 [ 273.639305][ C1] RAX: 0000000000000000 RBX: ffff88808f270d08 RCX: ffffffff8159a3d7 [ 273.647276][ C1] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88808f270d08 [ 273.655262][ C1] RBP: ffff8880ae9092d0 R08: 1ffff11011e4e1a1 R09: ffffed1011e4e1a2 [ 273.663231][ C1] R10: ffffed1011e4e1a1 R11: ffff88808f270d0b R12: 0000000000000001 [ 273.671198][ C1] R13: 0000000000000003 R14: ffffed1011e4e1a1 R15: 0000000000000001 [ 273.679289][ C1] ? apic_timer_interrupt+0xa/0x20 [ 273.684417][ C1] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 273.690837][ C1] ? __pv_queued_spin_lock_slowpath+0xd10/0xd10 [ 273.697087][ C1] ? mark_held_locks+0xf0/0xf0 [ 273.701855][ C1] do_raw_spin_lock+0x20e/0x2e0 [ 273.706704][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 273.711642][ C1] ? lock_acquire+0x190/0x410 [ 273.716329][ C1] ? release_sock+0x20/0x1c0 [ 273.720925][ C1] ? __kasan_check_read+0x11/0x20 [ 273.725960][ C1] _raw_spin_lock_bh+0x3b/0x50 [ 273.730728][ C1] ? release_sock+0x20/0x1c0 [ 273.735324][ C1] release_sock+0x20/0x1c0 [ 273.739747][ C1] wait_on_pending_writer+0x20f/0x420 [ 273.745120][ C1] ? ip6_rcv_finish+0x1de/0x2f0 [ 273.749966][ C1] ? tls_init+0x560/0x560 [ 273.754291][ C1] ? process_backlog+0x206/0x750 [ 273.759237][ C1] ? net_rx_action+0x508/0x10c0 [ 273.764110][ C1] ? __do_softirq+0x262/0x98c [ 273.768787][ C1] ? prepare_to_wait_exclusive+0x320/0x320 [ 273.774599][ C1] ? inet_release+0xed/0x200 [ 273.779191][ C1] ? inet6_release+0x53/0x80 [ 273.783869][ C1] ? __sock_release+0xce/0x280 [ 273.788636][ C1] ? sock_close+0x1e/0x30 [ 273.792968][ C1] ? __fput+0x2ff/0x890 [ 273.797150][ C1] ? ____fput+0x16/0x20 [ 273.801299][ C1] ? task_work_run+0x145/0x1c0 [ 273.806066][ C1] ? exit_to_usermode_loop+0x316/0x380 [ 273.811530][ C1] tls_sk_proto_cleanup+0x2c5/0x3e0 [ 273.816729][ C1] ? wait_on_pending_writer+0x420/0x420 [ 273.822278][ C1] tls_sk_proto_unhash+0x90/0x3f0 [ 273.827321][ C1] tcp_set_state+0x5b9/0x7d0 [ 273.831939][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 273.838180][ C1] ? __sk_mem_reduce_allocated+0x1b0/0x560 [ 273.843987][ C1] ? tcp_alloc_md5sig_pool+0x4a0/0x4a0 [ 273.849537][ C1] ? __sk_mem_reclaim+0x55/0x70 [ 273.854385][ C1] ? tcp_write_queue_purge+0x5d8/0x1310 [ 273.859933][ C1] ? inet6_sk_rx_dst_set+0x244/0x6f0 [ 273.865214][ C1] tcp_done+0xe2/0x320 [ 273.869279][ C1] tcp_reset+0x132/0x500 [ 273.873521][ C1] tcp_validate_incoming+0xa2d/0x1660 [ 273.878890][ C1] tcp_rcv_established+0x6b5/0x1e70 [ 273.884087][ C1] ? mark_held_locks+0xf0/0xf0 [ 273.888847][ C1] ? sk_filter_trim_cap+0x45f/0xb30 [ 273.894040][ C1] ? tcp_data_queue+0x4860/0x4860 [ 273.899064][ C1] ? do_raw_spin_lock+0x12a/0x2e0 [ 273.904102][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 273.909038][ C1] ? lock_acquire+0x190/0x410 [ 273.913752][ C1] tcp_v6_do_rcv+0x41e/0x12c0 [ 273.918444][ C1] tcp_v6_rcv+0x31f1/0x3500 [ 273.923053][ C1] ? tcp_v6_syn_recv_sock+0x2290/0x2290 [ 273.928602][ C1] ? nf_confirm+0x360/0x4d0 [ 273.933109][ C1] ? mark_held_locks+0xf0/0xf0 [ 273.937868][ C1] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 273.943527][ C1] ip6_input_finish+0x84/0x170 [ 273.948293][ C1] ip6_input+0xe4/0x3f0 [ 273.952441][ C1] ? ip6_input_finish+0x170/0x170 [ 273.957462][ C1] ? __kasan_check_read+0x11/0x20 [ 273.962479][ C1] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 273.968371][ C1] ? lock_downgrade+0x920/0x920 [ 273.973217][ C1] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 273.979476][ C1] ip6_rcv_finish+0x1de/0x2f0 [ 273.984153][ C1] ipv6_rcv+0x10e/0x420 [ 273.988304][ C1] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 273.993755][ C1] ? lock_downgrade+0x920/0x920 [ 273.998598][ C1] ? lock_downgrade+0x920/0x920 [ 274.003446][ C1] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 274.009333][ C1] ? trace_hardirqs_off+0x62/0x240 [ 274.014441][ C1] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 274.019907][ C1] __netif_receive_skb_one_core+0x113/0x1a0 [ 274.025795][ C1] ? __netif_receive_skb_core+0x3060/0x3060 [ 274.031704][ C1] ? lock_acquire+0x190/0x410 [ 274.036377][ C1] ? process_backlog+0x195/0x750 [ 274.041320][ C1] __netif_receive_skb+0x2c/0x1d0 [ 274.046361][ C1] process_backlog+0x206/0x750 [ 274.051125][ C1] ? lock_acquire+0x190/0x410 [ 274.055801][ C1] ? clockevents_program_event+0x15a/0x370 [ 274.061610][ C1] net_rx_action+0x508/0x10c0 [ 274.066291][ C1] ? napi_complete_done+0x4b0/0x4b0 [ 274.071485][ C1] ? sched_clock+0x2e/0x50 [ 274.075903][ C1] ? kvm_clock_read+0x18/0x30 [ 274.080578][ C1] ? inet_csk_listen_stop+0x1bc/0x850 [ 274.085953][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 274.092191][ C1] __do_softirq+0x262/0x98c [ 274.096698][ C1] ? inet_csk_listen_stop+0x1bc/0x850 [ 274.102087][ C1] do_softirq_own_stack+0x2a/0x40 [ 274.108686][ C1] [ 274.111624][ C1] do_softirq.part.0+0x11a/0x170 [ 274.116559][ C1] __local_bh_enable_ip+0x211/0x270 [ 274.121776][ C1] inet_csk_listen_stop+0x1e0/0x850 [ 274.126975][ C1] tcp_close+0xd5b/0x10e0 [ 274.131304][ C1] ? ip_mc_drop_socket+0x211/0x270 [ 274.136412][ C1] ? down_write+0xdf/0x150 [ 274.140858][ C1] inet_release+0xed/0x200 [ 274.145270][ C1] inet6_release+0x53/0x80 [ 274.149702][ C1] __sock_release+0xce/0x280 [ 274.154291][ C1] sock_close+0x1e/0x30 [ 274.158441][ C1] __fput+0x2ff/0x890 [ 274.162419][ C1] ? __sock_release+0x280/0x280 [ 274.167272][ C1] ____fput+0x16/0x20 [ 274.171249][ C1] task_work_run+0x145/0x1c0 [ 274.175843][ C1] exit_to_usermode_loop+0x316/0x380 [ 274.181125][ C1] do_syscall_64+0x65f/0x760 [ 274.185721][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 274.191608][ C1] RIP: 0033:0x406571 [ 274.195504][ 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 [ 274.215107][ C1] RSP: 002b:00007ffd3a06d300 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 274.223525][ C1] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000406571 [ 274.231494][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 274.239468][ C1] RBP: 00000000006dcc20 R08: 0000000000000140 R09: 0000000000000140 [ 274.247446][ C1] R10: 00007ffd3a06d330 R11: 0000000000000293 R12: 00007ffd3a06d360 [ 274.255423][ C1] R13: 00000000006dcc2c R14: 000000000000002d R15: 0000000000000007