[ 66.773455][ T26] audit: type=1800 audit(1564345391.996:27): pid=9993 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 66.815201][ T26] audit: type=1800 audit(1564345392.096:28): pid=9993 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. [ 67.606338][ T26] audit: type=1800 audit(1564345392.886:29): pid=9993 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 [ 67.631385][ T26] audit: type=1800 audit(1564345392.886:30): pid=9993 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 '10.128.0.154' (ECDSA) to the list of known hosts. syzkaller login: [ 179.460659][T10147] IPVS: ftp: loaded support on port[0] = 21 [ 179.500468][T10147] chnl_net:caif_netlink_parms(): no params data found [ 179.521444][T10147] bridge0: port 1(bridge_slave_0) entered blocking state [ 179.528544][T10147] bridge0: port 1(bridge_slave_0) entered disabled state [ 179.536477][T10147] device bridge_slave_0 entered promiscuous mode [ 179.543790][T10147] bridge0: port 2(bridge_slave_1) entered blocking state [ 179.551012][T10147] bridge0: port 2(bridge_slave_1) entered disabled state [ 179.558614][T10147] device bridge_slave_1 entered promiscuous mode [ 179.572157][T10147] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 179.582319][T10147] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 179.598523][T10147] team0: Port device team_slave_0 added [ 179.604963][T10147] team0: Port device team_slave_1 added [ 179.662515][T10147] device hsr_slave_0 entered promiscuous mode [ 179.721046][T10147] device hsr_slave_1 entered promiscuous mode [ 179.776095][T10147] bridge0: port 2(bridge_slave_1) entered blocking state [ 179.783219][T10147] bridge0: port 2(bridge_slave_1) entered forwarding state [ 179.790915][T10147] bridge0: port 1(bridge_slave_0) entered blocking state [ 179.797945][T10147] bridge0: port 1(bridge_slave_0) entered forwarding state [ 179.822172][T10147] 8021q: adding VLAN 0 to HW filter on device bond0 [ 179.833860][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 179.842201][ T17] bridge0: port 1(bridge_slave_0) entered disabled state [ 179.849785][ T17] bridge0: port 2(bridge_slave_1) entered disabled state [ 179.857559][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 179.867232][T10147] 8021q: adding VLAN 0 to HW filter on device team0 [ 179.876451][ T2422] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 179.884731][ T2422] bridge0: port 1(bridge_slave_0) entered blocking state [ 179.891929][ T2422] bridge0: port 1(bridge_slave_0) entered forwarding state [ 179.901283][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 179.909532][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 179.916590][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 179.929886][ T2422] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 179.938927][ T2422] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 179.948896][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 179.959270][ T2422] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 179.969823][T10147] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network executing program [ 179.981179][T10147] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 179.988866][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 180.003024][T10147] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 180.031435][ C1] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 285.200754][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 285.207527][ C0] rcu: 0-...!: (1 GPs behind) idle=04a/1/0x4000000000000002 softirq=9939/9940 fqs=2 [ 285.217141][ C0] (t=10501 jiffies g=9749 q=0) [ 285.221994][ C0] rcu: rcu_preempt kthread starved for 10498 jiffies! g9749 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 285.233250][ C0] rcu: RCU grace-period kthread stack dump: [ 285.239311][ C0] rcu_preempt I29528 10 2 0x80004000 [ 285.245640][ C0] Call Trace: [ 285.248934][ C0] __schedule+0x755/0x15b0 [ 285.253355][ C0] ? __sched_text_start+0x8/0x8 [ 285.258218][ C0] schedule+0xa8/0x270 [ 285.262281][ C0] schedule_timeout+0x486/0xc50 [ 285.267128][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 285.272146][ C0] ? usleep_range+0x170/0x170 [ 285.276812][ C0] ? trace_hardirqs_on+0x67/0x240 [ 285.281844][ C0] ? __kasan_check_read+0x11/0x20 [ 285.288261][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 285.293899][ C0] ? swake_up_one+0x60/0x60 [ 285.298400][ C0] rcu_gp_kthread+0x9b2/0x18c0 [ 285.303165][ C0] ? rcu_barrier+0x310/0x310 [ 285.307758][ C0] ? trace_hardirqs_on+0x67/0x240 [ 285.312802][ C0] ? __kasan_check_read+0x11/0x20 [ 285.317842][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 285.324076][ C0] ? __kthread_parkme+0x108/0x1c0 [ 285.329097][ C0] ? __kasan_check_read+0x11/0x20 [ 285.334201][ C0] kthread+0x361/0x430 [ 285.338303][ C0] ? rcu_barrier+0x310/0x310 [ 285.342886][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 285.349378][ C0] ret_from_fork+0x24/0x30 [ 285.353896][ C0] NMI backtrace for cpu 0 [ 285.358266][ C0] CPU: 0 PID: 10147 Comm: syz-executor170 Not tainted 5.3.0-rc1-next-20190726 #53 [ 285.367449][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 285.377497][ C0] Call Trace: [ 285.380872][ C0] [ 285.383742][ C0] dump_stack+0x172/0x1f0 [ 285.388183][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 285.393379][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 285.399618][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 285.405367][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 285.411862][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 285.417748][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 285.425287][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 285.430825][ C0] ? raise_softirq+0x138/0x340 [ 285.435588][ C0] update_process_times+0x32/0x80 [ 285.440606][ C0] tick_sched_handle+0xa2/0x190 [ 285.445450][ C0] tick_sched_timer+0x53/0x140 [ 285.450205][ C0] __hrtimer_run_queues+0x364/0xe40 [ 285.455400][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 285.460678][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 285.466216][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 285.471936][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 285.477996][ C0] hrtimer_interrupt+0x314/0x770 [ 285.482937][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 285.488489][ C0] apic_timer_interrupt+0xf/0x20 [ 285.493421][ C0] RIP: 0010:__kasan_check_read+0x5/0x20 [ 285.498966][ C0] Code: 0f 0b 4c 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 [ 285.518951][ C0] RSP: 0018:ffff8880ae809200 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 285.527365][ C0] RAX: 0000000000000000 RBX: ffff8880a9414d08 RCX: ffffffff8159a3d7 [ 285.535337][ C0] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880a9414d08 [ 285.543305][ C0] RBP: ffff8880ae8092d0 R08: 1ffff110152829a1 R09: ffffed10152829a2 [ 285.551272][ C0] R10: ffffed10152829a1 R11: ffff8880a9414d0b R12: 0000000000000001 [ 285.559699][ C0] R13: 0000000000000003 R14: ffffed10152829a1 R15: 0000000000000001 [ 285.567673][ C0] ? apic_timer_interrupt+0xa/0x20 [ 285.572929][ C0] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 285.579250][ C0] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 285.585576][ C0] ? __pv_queued_spin_lock_slowpath+0xd10/0xd10 [ 285.592168][ C0] ? mark_held_locks+0xf0/0xf0 [ 285.596935][ C0] do_raw_spin_lock+0x20e/0x2e0 [ 285.601792][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 285.606731][ C0] ? lock_acquire+0x190/0x410 [ 285.611406][ C0] ? release_sock+0x20/0x1c0 [ 285.615997][ C0] ? __kasan_check_read+0x11/0x20 [ 285.621027][ C0] _raw_spin_lock_bh+0x3b/0x50 [ 285.625793][ C0] ? release_sock+0x20/0x1c0 [ 285.630375][ C0] release_sock+0x20/0x1c0 [ 285.634799][ C0] wait_on_pending_writer+0x20f/0x420 [ 285.640269][ C0] ? ip6_rcv_finish+0x1de/0x2f0 [ 285.645202][ C0] ? tls_init+0x560/0x560 [ 285.649528][ C0] ? process_backlog+0x206/0x750 [ 285.654466][ C0] ? net_rx_action+0x508/0x10c0 [ 285.659398][ C0] ? __do_softirq+0x262/0x98c [ 285.664073][ C0] ? prepare_to_wait_exclusive+0x320/0x320 [ 285.669875][ C0] ? inet_release+0xed/0x200 [ 285.674459][ C0] ? inet6_release+0x53/0x80 [ 285.679048][ C0] ? __sock_release+0xce/0x280 [ 285.683805][ C0] ? sock_close+0x1e/0x30 [ 285.688220][ C0] ? __fput+0x2ff/0x890 [ 285.692375][ C0] ? ____fput+0x16/0x20 [ 285.696521][ C0] ? task_work_run+0x145/0x1c0 [ 285.701539][ C0] ? exit_to_usermode_loop+0x316/0x380 [ 285.706997][ C0] tls_sk_proto_cleanup+0x2c5/0x3e0 [ 285.712196][ C0] ? wait_on_pending_writer+0x420/0x420 [ 285.717743][ C0] tls_sk_proto_unhash+0x90/0x3f0 [ 285.722770][ C0] tcp_set_state+0x5b9/0x7d0 [ 285.727358][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 285.733779][ C0] ? __sk_mem_reduce_allocated+0x1b0/0x560 [ 285.739590][ C0] ? tcp_alloc_md5sig_pool+0x4a0/0x4a0 [ 285.745054][ C0] ? __sk_mem_reclaim+0x55/0x70 [ 285.749904][ C0] ? tcp_write_queue_purge+0x5d8/0x1310 [ 285.755450][ C0] ? inet6_sk_rx_dst_set+0x244/0x6f0 [ 285.760730][ C0] tcp_done+0xe2/0x320 [ 285.764810][ C0] tcp_reset+0x132/0x500 [ 285.769059][ C0] tcp_validate_incoming+0xa2d/0x1660 [ 285.774428][ C0] tcp_rcv_established+0x6b5/0x1e70 [ 285.780408][ C0] ? mark_held_locks+0xf0/0xf0 [ 285.785251][ C0] ? sk_filter_trim_cap+0x45f/0xb30 [ 285.790448][ C0] ? tcp_data_queue+0x4860/0x4860 [ 285.795465][ C0] ? do_raw_spin_lock+0x12a/0x2e0 [ 285.800485][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 285.805420][ C0] ? lock_acquire+0x190/0x410 [ 285.810189][ C0] tcp_v6_do_rcv+0x41e/0x12c0 [ 285.815041][ C0] tcp_v6_rcv+0x31f1/0x3500 [ 285.819578][ C0] ? tcp_v6_syn_recv_sock+0x2290/0x2290 [ 285.825121][ C0] ? nf_confirm+0x360/0x4d0 [ 285.830328][ C0] ? mark_held_locks+0xf0/0xf0 [ 285.835089][ C0] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 285.840815][ C0] ip6_input_finish+0x84/0x170 [ 285.845575][ C0] ip6_input+0xe4/0x3f0 [ 285.849727][ C0] ? ip6_input_finish+0x170/0x170 [ 285.854749][ C0] ? __kasan_check_read+0x11/0x20 [ 285.859788][ C0] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 285.865790][ C0] ? lock_downgrade+0x920/0x920 [ 285.870657][ C0] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 285.876895][ C0] ip6_rcv_finish+0x1de/0x2f0 [ 285.882095][ C0] ipv6_rcv+0x10e/0x420 [ 285.886245][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 285.891706][ C0] ? lock_downgrade+0x920/0x920 [ 285.896561][ C0] ? lock_downgrade+0x920/0x920 [ 285.901598][ C0] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 285.907491][ C0] ? trace_hardirqs_off+0x62/0x240 [ 285.912609][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 285.918060][ C0] __netif_receive_skb_one_core+0x113/0x1a0 [ 285.923970][ C0] ? __netif_receive_skb_core+0x3060/0x3060 [ 285.929871][ C0] ? lock_acquire+0x190/0x410 [ 285.934550][ C0] ? process_backlog+0x195/0x750 [ 285.939479][ C0] __netif_receive_skb+0x2c/0x1d0 [ 285.944495][ C0] process_backlog+0x206/0x750 [ 285.949252][ C0] ? lock_acquire+0x190/0x410 [ 285.953928][ C0] ? clockevents_program_event+0x15a/0x370 [ 285.959731][ C0] net_rx_action+0x508/0x10c0 [ 285.964421][ C0] ? napi_complete_done+0x4b0/0x4b0 [ 285.969611][ C0] ? sched_clock+0x2e/0x50 [ 285.974016][ C0] ? kvm_clock_read+0x18/0x30 [ 285.978797][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 285.984161][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 285.990400][ C0] __do_softirq+0x262/0x98c [ 285.994901][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 286.000275][ C0] do_softirq_own_stack+0x2a/0x40 [ 286.005294][ C0] [ 286.008223][ C0] do_softirq.part.0+0x11a/0x170 [ 286.013508][ C0] __local_bh_enable_ip+0x211/0x270 [ 286.018705][ C0] inet_csk_listen_stop+0x1e0/0x850 [ 286.024074][ C0] tcp_close+0xd5b/0x10e0 [ 286.028493][ C0] ? ip_mc_drop_socket+0x211/0x270 [ 286.033596][ C0] ? down_write+0xdf/0x150 [ 286.038017][ C0] inet_release+0xed/0x200 [ 286.042427][ C0] inet6_release+0x53/0x80 [ 286.046837][ C0] __sock_release+0xce/0x280 [ 286.051423][ C0] sock_close+0x1e/0x30 [ 286.055576][ C0] __fput+0x2ff/0x890 [ 286.059648][ C0] ? __sock_release+0x280/0x280 [ 286.064495][ C0] ____fput+0x16/0x20 [ 286.068469][ C0] task_work_run+0x145/0x1c0 [ 286.073056][ C0] exit_to_usermode_loop+0x316/0x380 [ 286.078426][ C0] do_syscall_64+0x65f/0x760 [ 286.083450][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 286.089436][ C0] RIP: 0033:0x4065e1 [ 286.093414][ 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 [ 286.113012][ C0] RSP: 002b:00007ffce0d9cb10 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 286.121419][ C0] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00000000004065e1 [ 286.129474][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 286.137439][ C0] RBP: 00000000006dcc20 R08: 0000000000000140 R09: 0000000000000140 [ 286.145411][ C0] R10: 00007ffce0d9cb40 R11: 0000000000000293 R12: 00007ffce0d9cb70 [ 286.153375][ C0] R13: 00000000006dcc2c R14: 000000000000002d R15: 0000000000000007