[ 70.138832][ T26] audit: type=1800 audit(1564155192.536:27): pid=10159 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 70.189746][ T26] audit: type=1800 audit(1564155192.536:28): pid=10159 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. [ 71.049071][ T26] audit: type=1800 audit(1564155193.516:29): pid=10159 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 [ 71.069355][ T26] audit: type=1800 audit(1564155193.516:30): pid=10159 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 '10.128.0.229' (ECDSA) to the list of known hosts. syzkaller login: [ 177.793928][T10313] IPVS: ftp: loaded support on port[0] = 21 [ 177.841540][T10313] chnl_net:caif_netlink_parms(): no params data found [ 177.866004][T10313] bridge0: port 1(bridge_slave_0) entered blocking state [ 177.873140][T10313] bridge0: port 1(bridge_slave_0) entered disabled state [ 177.881227][T10313] device bridge_slave_0 entered promiscuous mode [ 177.888799][T10313] bridge0: port 2(bridge_slave_1) entered blocking state [ 177.895979][T10313] bridge0: port 2(bridge_slave_1) entered disabled state [ 177.903740][T10313] device bridge_slave_1 entered promiscuous mode [ 177.919182][T10313] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 177.929986][T10313] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 177.947382][T10313] team0: Port device team_slave_0 added [ 177.955069][T10313] team0: Port device team_slave_1 added [ 178.006192][T10313] device hsr_slave_0 entered promiscuous mode [ 178.074682][T10313] device hsr_slave_1 entered promiscuous mode [ 178.160340][T10313] bridge0: port 2(bridge_slave_1) entered blocking state [ 178.167575][T10313] bridge0: port 2(bridge_slave_1) entered forwarding state [ 178.175196][T10313] bridge0: port 1(bridge_slave_0) entered blocking state [ 178.182258][T10313] bridge0: port 1(bridge_slave_0) entered forwarding state [ 178.209731][T10313] 8021q: adding VLAN 0 to HW filter on device bond0 [ 178.221837][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 178.240697][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 178.248498][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 178.257717][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 178.276652][T10313] 8021q: adding VLAN 0 to HW filter on device team0 [ 178.286138][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 178.295218][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 178.302298][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 178.315329][ T3516] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 178.323793][ T3516] bridge0: port 2(bridge_slave_1) entered blocking state [ 178.330932][ T3516] bridge0: port 2(bridge_slave_1) entered forwarding state [ 178.344919][T10315] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 178.353896][T10315] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 178.363936][T10315] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 178.376130][T10315] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 178.385802][T10315] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 178.396302][T10313] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 178.411793][T10313] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 178.444164][ C1] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 283.614288][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 283.621068][ C0] rcu: 0-...!: (1 GPs behind) idle=cb6/1/0x4000000000000002 softirq=9858/9859 fqs=2 [ 283.630627][ C0] (t=10500 jiffies g=10265 q=2) [ 283.635569][ C0] rcu: rcu_preempt kthread starved for 10496 jiffies! g10265 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 283.647006][ C0] rcu: RCU grace-period kthread stack dump: [ 283.653275][ C0] rcu_preempt I29528 10 2 0x80004000 [ 283.659721][ C0] Call Trace: [ 283.663109][ C0] __schedule+0x755/0x15b0 [ 283.667532][ C0] ? __sched_text_start+0x8/0x8 [ 283.672383][ C0] schedule+0xa8/0x270 [ 283.676544][ C0] schedule_timeout+0x486/0xc50 [ 283.681387][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 283.686319][ C0] ? usleep_range+0x170/0x170 [ 283.690988][ C0] ? trace_hardirqs_on+0x67/0x240 [ 283.696006][ C0] ? __kasan_check_read+0x11/0x20 [ 283.701635][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 283.707181][ C0] ? swake_up_one+0x60/0x60 [ 283.711681][ C0] rcu_gp_kthread+0x9b2/0x18c0 [ 283.716470][ C0] ? rcu_barrier+0x310/0x310 [ 283.721056][ C0] ? trace_hardirqs_on+0x67/0x240 [ 283.726071][ C0] ? __kasan_check_read+0x11/0x20 [ 283.731090][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 283.737324][ C0] ? __kthread_parkme+0x108/0x1c0 [ 283.742356][ C0] ? __kasan_check_read+0x11/0x20 [ 283.747394][ C0] kthread+0x361/0x430 [ 283.751460][ C0] ? rcu_barrier+0x310/0x310 [ 283.756042][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 283.762277][ C0] ret_from_fork+0x24/0x30 [ 283.766818][ C0] NMI backtrace for cpu 0 [ 283.771184][ C0] CPU: 0 PID: 10313 Comm: syz-executor616 Not tainted 5.3.0-rc1-next-20190726 #53 [ 283.780366][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 283.790428][ C0] Call Trace: [ 283.793721][ C0] [ 283.796576][ C0] dump_stack+0x172/0x1f0 [ 283.800901][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 283.806105][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 283.812532][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 283.818160][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 283.824247][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 283.830158][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 283.835269][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 283.840806][ C0] ? raise_softirq+0x138/0x340 [ 283.845567][ C0] update_process_times+0x32/0x80 [ 283.850591][ C0] tick_sched_handle+0xa2/0x190 [ 283.855452][ C0] tick_sched_timer+0x53/0x140 [ 283.860210][ C0] __hrtimer_run_queues+0x364/0xe40 [ 283.865408][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 283.870718][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 283.876262][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 283.882003][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 283.888066][ C0] hrtimer_interrupt+0x314/0x770 [ 283.893008][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 283.898567][ C0] apic_timer_interrupt+0xf/0x20 [ 283.903504][ C0] RIP: 0010:native_queued_spin_lock_slowpath+0x132/0x9f0 [ 283.910616][ 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 [ 283.930222][ C0] RSP: 0018:ffff8880ae809210 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 [ 283.938658][ C0] RAX: 0000000000000000 RBX: ffff8880a8212d08 RCX: ffffffff8159a3d7 [ 283.946634][ C0] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880a8212d08 [ 283.954633][ C0] RBP: ffff8880ae8092d0 R08: 1ffff110150425a1 R09: ffffed10150425a2 [ 283.962610][ C0] R10: ffffed10150425a1 R11: ffff8880a8212d0b R12: 0000000000000001 [ 283.970586][ C0] R13: 0000000000000003 R14: ffffed10150425a1 R15: 0000000000000001 [ 283.978586][ C0] ? apic_timer_interrupt+0xa/0x20 [ 283.983726][ C0] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 283.990068][ C0] ? __pv_queued_spin_lock_slowpath+0xd10/0xd10 [ 283.996314][ C0] ? mark_held_locks+0xf0/0xf0 [ 284.001078][ C0] do_raw_spin_lock+0x20e/0x2e0 [ 284.005932][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 284.010875][ C0] ? lock_acquire+0x190/0x410 [ 284.015568][ C0] ? release_sock+0x20/0x1c0 [ 284.020171][ C0] ? __kasan_check_read+0x11/0x20 [ 284.025213][ C0] _raw_spin_lock_bh+0x3b/0x50 [ 284.029972][ C0] ? release_sock+0x20/0x1c0 [ 284.034555][ C0] release_sock+0x20/0x1c0 [ 284.038972][ C0] wait_on_pending_writer+0x20f/0x420 [ 284.044357][ C0] ? ip6_rcv_finish+0x1de/0x2f0 [ 284.049235][ C0] ? tls_init+0x560/0x560 [ 284.053567][ C0] ? process_backlog+0x206/0x750 [ 284.058590][ C0] ? net_rx_action+0x508/0x10c0 [ 284.063449][ C0] ? __do_softirq+0x262/0x98c [ 284.068390][ C0] ? prepare_to_wait_exclusive+0x320/0x320 [ 284.074195][ C0] ? inet_release+0xed/0x200 [ 284.078895][ C0] ? inet6_release+0x53/0x80 [ 284.083486][ C0] ? __sock_release+0xce/0x280 [ 284.088251][ C0] ? sock_close+0x1e/0x30 [ 284.092576][ C0] ? __fput+0x2ff/0x890 [ 284.096897][ C0] ? ____fput+0x16/0x20 [ 284.101041][ C0] ? task_work_run+0x145/0x1c0 [ 284.105802][ C0] ? exit_to_usermode_loop+0x316/0x380 [ 284.111347][ C0] tls_sk_proto_cleanup+0x2c5/0x3e0 [ 284.116542][ C0] ? wait_on_pending_writer+0x420/0x420 [ 284.122093][ C0] tls_sk_proto_unhash+0x90/0x3f0 [ 284.127114][ C0] tcp_set_state+0x5b9/0x7d0 [ 284.131701][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 284.137942][ C0] ? __sk_mem_reduce_allocated+0x1b0/0x560 [ 284.143830][ C0] ? tcp_alloc_md5sig_pool+0x4a0/0x4a0 [ 284.149283][ C0] ? __sk_mem_reclaim+0x55/0x70 [ 284.154128][ C0] ? tcp_write_queue_purge+0x5d8/0x1310 [ 284.159684][ C0] ? inet6_sk_rx_dst_set+0x244/0x6f0 [ 284.164968][ C0] tcp_done+0xe2/0x320 [ 284.169030][ C0] tcp_reset+0x132/0x500 [ 284.173267][ C0] tcp_validate_incoming+0xa2d/0x1660 [ 284.178643][ C0] tcp_rcv_established+0x6b5/0x1e70 [ 284.183852][ C0] ? mark_held_locks+0xf0/0xf0 [ 284.188619][ C0] ? sk_filter_trim_cap+0x45f/0xb30 [ 284.193900][ C0] ? tcp_data_queue+0x4860/0x4860 [ 284.198930][ C0] ? do_raw_spin_lock+0x12a/0x2e0 [ 284.203948][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 284.208901][ C0] ? lock_acquire+0x190/0x410 [ 284.213666][ C0] tcp_v6_do_rcv+0x41e/0x12c0 [ 284.218343][ C0] tcp_v6_rcv+0x31f1/0x3500 [ 284.222850][ C0] ? tcp_v6_syn_recv_sock+0x2290/0x2290 [ 284.228477][ C0] ? nf_confirm+0x360/0x4d0 [ 284.232984][ C0] ? mark_held_locks+0xf0/0xf0 [ 284.237750][ C0] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 284.243394][ C0] ip6_input_finish+0x84/0x170 [ 284.248155][ C0] ip6_input+0xe4/0x3f0 [ 284.252302][ C0] ? ip6_input_finish+0x170/0x170 [ 284.257331][ C0] ? __kasan_check_read+0x11/0x20 [ 284.262352][ C0] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 284.268251][ C0] ? lock_downgrade+0x920/0x920 [ 284.273096][ C0] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 284.279329][ C0] ip6_rcv_finish+0x1de/0x2f0 [ 284.283999][ C0] ipv6_rcv+0x10e/0x420 [ 284.288597][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 284.294046][ C0] ? lock_downgrade+0x920/0x920 [ 284.298889][ C0] ? lock_downgrade+0x920/0x920 [ 284.303841][ C0] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 284.309741][ C0] ? trace_hardirqs_off+0x62/0x240 [ 284.314852][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 284.320322][ C0] __netif_receive_skb_one_core+0x113/0x1a0 [ 284.326212][ C0] ? __netif_receive_skb_core+0x3060/0x3060 [ 284.332104][ C0] ? lock_acquire+0x190/0x410 [ 284.336883][ C0] ? process_backlog+0x195/0x750 [ 284.341825][ C0] __netif_receive_skb+0x2c/0x1d0 [ 284.346850][ C0] process_backlog+0x206/0x750 [ 284.351612][ C0] ? lock_acquire+0x190/0x410 [ 284.356305][ C0] ? clockevents_program_event+0x15a/0x370 [ 284.362127][ C0] net_rx_action+0x508/0x10c0 [ 284.366808][ C0] ? napi_complete_done+0x4b0/0x4b0 [ 284.372006][ C0] ? sched_clock+0x2e/0x50 [ 284.376423][ C0] ? kvm_clock_read+0x18/0x30 [ 284.381100][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 284.386478][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 284.392734][ C0] __do_softirq+0x262/0x98c [ 284.398472][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 284.403862][ C0] do_softirq_own_stack+0x2a/0x40 [ 284.408969][ C0] [ 284.411934][ C0] do_softirq.part.0+0x11a/0x170 [ 284.416876][ C0] __local_bh_enable_ip+0x211/0x270 [ 284.422078][ C0] inet_csk_listen_stop+0x1e0/0x850 [ 284.427290][ C0] tcp_close+0xd5b/0x10e0 [ 284.431726][ C0] ? ip_mc_drop_socket+0x211/0x270 [ 284.436839][ C0] ? down_write+0xdf/0x150 [ 284.441257][ C0] inet_release+0xed/0x200 [ 284.445767][ C0] inet6_release+0x53/0x80 [ 284.450194][ C0] __sock_release+0xce/0x280 [ 284.454787][ C0] sock_close+0x1e/0x30 [ 284.458946][ C0] __fput+0x2ff/0x890 [ 284.462938][ C0] ? __sock_release+0x280/0x280 [ 284.468172][ C0] ____fput+0x16/0x20 [ 284.472170][ C0] task_work_run+0x145/0x1c0 [ 284.476938][ C0] exit_to_usermode_loop+0x316/0x380 [ 284.482316][ C0] do_syscall_64+0x65f/0x760 [ 284.486911][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 284.492829][ C0] RIP: 0033:0x406571 [ 284.496746][ 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 [ 284.516346][ C0] RSP: 002b:00007ffe07900b60 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 284.524750][ C0] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000406571 [ 284.532719][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 284.540682][ C0] RBP: 00000000006dcc20 R08: 0000000000000140 R09: 0000000000000140 [ 284.548654][ C0] R10: 00007ffe07900b90 R11: 0000000000000293 R12: 00007ffe07900bc0 [ 284.556627][ C0] R13: 00000000006dcc2c R14: 000000000000002d R15: 0000000000000007