[ 65.943097][ T27] audit: type=1800 audit(1564313601.095:27): pid=10026 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 65.979596][ T27] audit: type=1800 audit(1564313601.105:28): pid=10026 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. [ 66.508482][ T27] audit: type=1800 audit(1564313601.745:29): pid=10026 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 [ 66.533743][ T27] audit: type=1800 audit(1564313601.745:30): pid=10026 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 '10.128.0.102' (ECDSA) to the list of known hosts. syzkaller login: [ 194.583613][T10181] IPVS: ftp: loaded support on port[0] = 21 [ 194.629063][T10181] chnl_net:caif_netlink_parms(): no params data found [ 194.651618][T10181] bridge0: port 1(bridge_slave_0) entered blocking state [ 194.659017][T10181] bridge0: port 1(bridge_slave_0) entered disabled state [ 194.666656][T10181] device bridge_slave_0 entered promiscuous mode [ 194.674210][T10181] bridge0: port 2(bridge_slave_1) entered blocking state [ 194.681311][T10181] bridge0: port 2(bridge_slave_1) entered disabled state [ 194.689183][T10181] device bridge_slave_1 entered promiscuous mode [ 194.702749][T10181] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 194.713679][T10181] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 194.729682][T10181] team0: Port device team_slave_0 added [ 194.736723][T10181] team0: Port device team_slave_1 added [ 194.815323][T10181] device hsr_slave_0 entered promiscuous mode [ 194.893108][T10181] device hsr_slave_1 entered promiscuous mode [ 194.958560][T10181] bridge0: port 2(bridge_slave_1) entered blocking state [ 194.965787][T10181] bridge0: port 2(bridge_slave_1) entered forwarding state [ 194.973213][T10181] bridge0: port 1(bridge_slave_0) entered blocking state [ 194.980300][T10181] bridge0: port 1(bridge_slave_0) entered forwarding state [ 195.006920][T10181] 8021q: adding VLAN 0 to HW filter on device bond0 [ 195.018001][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 195.036755][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 195.044530][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 195.052256][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 195.063803][T10181] 8021q: adding VLAN 0 to HW filter on device team0 [ 195.073814][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 195.082184][ T17] bridge0: port 1(bridge_slave_0) entered blocking state [ 195.089299][ T17] bridge0: port 1(bridge_slave_0) entered forwarding state [ 195.100926][T10183] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 195.109501][T10183] bridge0: port 2(bridge_slave_1) entered blocking state [ 195.116582][T10183] bridge0: port 2(bridge_slave_1) entered forwarding state [ 195.134668][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 195.143834][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 195.152257][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready executing program [ 195.161321][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 195.169753][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 195.179435][T10181] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 195.194489][T10181] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 195.224514][ C1] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 300.382785][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 300.389444][ C1] rcu: 1-...!: (10500 ticks this GP) idle=282/1/0x4000000000000002 softirq=10737/10737 fqs=0 [ 300.399758][ C1] (t=10501 jiffies g=9969 q=6) [ 300.404607][ C1] rcu: rcu_preempt kthread starved for 10502 jiffies! g9969 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 300.415872][ C1] rcu: RCU grace-period kthread stack dump: [ 300.421783][ C1] rcu_preempt I29528 10 2 0x80004000 [ 300.428120][ C1] Call Trace: [ 300.431477][ C1] __schedule+0x755/0x15b0 [ 300.435900][ C1] ? __sched_text_start+0x8/0x8 [ 300.440753][ C1] schedule+0xa8/0x270 [ 300.444901][ C1] schedule_timeout+0x486/0xc50 [ 300.449750][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 300.454684][ C1] ? usleep_range+0x170/0x170 [ 300.459528][ C1] ? trace_hardirqs_on+0x67/0x240 [ 300.464541][ C1] ? __kasan_check_read+0x11/0x20 [ 300.469571][ C1] ? __next_timer_interrupt+0x1a0/0x1a0 [ 300.475116][ C1] ? swake_up_one+0x60/0x60 [ 300.479631][ C1] ? trace_hardirqs_on+0x67/0x240 [ 300.484647][ C1] rcu_gp_kthread+0x9b2/0x18c0 [ 300.489403][ C1] ? rcu_barrier+0x310/0x310 [ 300.493984][ C1] ? trace_hardirqs_on+0x67/0x240 [ 300.499030][ C1] ? __kasan_check_read+0x11/0x20 [ 300.504050][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 300.510288][ C1] ? __kthread_parkme+0x108/0x1c0 [ 300.515320][ C1] ? __kasan_check_read+0x11/0x20 [ 300.520355][ C1] kthread+0x361/0x430 [ 300.524438][ C1] ? rcu_barrier+0x310/0x310 [ 300.529021][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 300.535535][ C1] ret_from_fork+0x24/0x30 [ 300.539973][ C1] NMI backtrace for cpu 1 [ 300.544301][ C1] CPU: 1 PID: 10181 Comm: syz-executor365 Not tainted 5.3.0-rc1-next-20190726 #53 [ 300.555302][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 300.565351][ C1] Call Trace: [ 300.568626][ C1] [ 300.571555][ C1] dump_stack+0x172/0x1f0 [ 300.575889][ C1] nmi_cpu_backtrace.cold+0x70/0xb2 [ 300.581085][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 300.587325][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 300.592991][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 300.598977][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 300.604864][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 300.609983][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 300.615525][ C1] ? raise_softirq+0x138/0x340 [ 300.620303][ C1] update_process_times+0x32/0x80 [ 300.625326][ C1] tick_sched_handle+0xa2/0x190 [ 300.630171][ C1] tick_sched_timer+0x53/0x140 [ 300.634937][ C1] __hrtimer_run_queues+0x364/0xe40 [ 300.640626][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 300.645947][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 300.651507][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 300.657216][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 300.663276][ C1] hrtimer_interrupt+0x314/0x770 [ 300.668217][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 300.673763][ C1] apic_timer_interrupt+0xf/0x20 [ 300.678699][ C1] RIP: 0010:native_queued_spin_lock_slowpath+0xaa/0x9f0 [ 300.685631][ 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 89 70 53 00 41 0f b6 06 41 38 c5 7c 08 [ 300.705231][ C1] RSP: 0018:ffff8880ae909210 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 [ 300.713645][ C1] RAX: 0000000000000000 RBX: ffff8880a80d2d48 RCX: ffffffff8159a3d7 [ 300.721611][ C1] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880a80d2d48 [ 300.729678][ C1] RBP: ffff8880ae9092d0 R08: 1ffff1101501a5a9 R09: ffffed101501a5aa [ 300.737648][ C1] R10: ffffed101501a5a9 R11: ffff8880a80d2d4b R12: 0000000000000001 [ 300.745637][ C1] R13: 0000000000000003 R14: ffffed101501a5a9 R15: 0000000000000001 [ 300.753615][ C1] ? apic_timer_interrupt+0xa/0x20 [ 300.758722][ C1] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 300.765918][ C1] ? __pv_queued_spin_lock_slowpath+0xd10/0xd10 [ 300.772180][ C1] ? mark_held_locks+0xf0/0xf0 [ 300.776980][ C1] do_raw_spin_lock+0x20e/0x2e0 [ 300.781837][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 300.786765][ C1] ? lock_acquire+0x190/0x410 [ 300.791496][ C1] ? release_sock+0x20/0x1c0 [ 300.796100][ C1] ? __kasan_check_read+0x11/0x20 [ 300.801117][ C1] _raw_spin_lock_bh+0x3b/0x50 [ 300.805874][ C1] ? release_sock+0x20/0x1c0 [ 300.810457][ C1] release_sock+0x20/0x1c0 [ 300.814948][ C1] wait_on_pending_writer+0x20f/0x420 [ 300.820371][ C1] ? ip6_rcv_finish+0x1de/0x2f0 [ 300.825223][ C1] ? tls_init+0x560/0x560 [ 300.829591][ C1] ? process_backlog+0x206/0x750 [ 300.834527][ C1] ? net_rx_action+0x508/0x10c0 [ 300.839370][ C1] ? __do_softirq+0x262/0x98c [ 300.844061][ C1] ? prepare_to_wait_exclusive+0x320/0x320 [ 300.849942][ C1] ? inet_release+0xed/0x200 [ 300.854577][ C1] ? inet6_release+0x53/0x80 [ 300.859203][ C1] ? __sock_release+0xce/0x280 [ 300.863961][ C1] ? sock_close+0x1e/0x30 [ 300.868281][ C1] ? __fput+0x2ff/0x890 [ 300.872425][ C1] ? ____fput+0x16/0x20 [ 300.876590][ C1] ? task_work_run+0x145/0x1c0 [ 300.881362][ C1] ? exit_to_usermode_loop+0x316/0x380 [ 300.886827][ C1] tls_sk_proto_cleanup+0x2c5/0x3e0 [ 300.892030][ C1] ? wait_on_pending_writer+0x420/0x420 [ 300.897587][ C1] tls_sk_proto_unhash+0x90/0x3f0 [ 300.902703][ C1] tcp_set_state+0x5b9/0x7d0 [ 300.907304][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 300.913541][ C1] ? __sk_mem_reduce_allocated+0x1b0/0x560 [ 300.919346][ C1] ? tcp_alloc_md5sig_pool+0x4a0/0x4a0 [ 300.924805][ C1] ? __sk_mem_reclaim+0x55/0x70 [ 300.929664][ C1] ? tcp_write_queue_purge+0x5d8/0x1310 [ 300.935283][ C1] ? inet6_sk_rx_dst_set+0x244/0x6f0 [ 300.940570][ C1] tcp_done+0xe2/0x320 [ 300.944634][ C1] tcp_reset+0x132/0x500 [ 300.948900][ C1] tcp_validate_incoming+0xa2d/0x1660 [ 300.954285][ C1] tcp_rcv_established+0x6b5/0x1e70 [ 300.959492][ C1] ? mark_held_locks+0xf0/0xf0 [ 300.964327][ C1] ? sk_filter_trim_cap+0x45f/0xb30 [ 300.969533][ C1] ? tcp_data_queue+0x4860/0x4860 [ 300.974554][ C1] ? do_raw_spin_lock+0x12a/0x2e0 [ 300.979570][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 300.984504][ C1] ? lock_acquire+0x190/0x410 [ 300.989185][ C1] tcp_v6_do_rcv+0x41e/0x12c0 [ 300.993875][ C1] tcp_v6_rcv+0x31f1/0x3500 [ 300.998384][ C1] ? tcp_v6_syn_recv_sock+0x2290/0x2290 [ 301.003982][ C1] ? nf_confirm+0x360/0x4d0 [ 301.008491][ C1] ? mark_held_locks+0xf0/0xf0 [ 301.013258][ C1] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 301.018897][ C1] ip6_input_finish+0x84/0x170 [ 301.023655][ C1] ip6_input+0xe4/0x3f0 [ 301.027807][ C1] ? ip6_input_finish+0x170/0x170 [ 301.032822][ C1] ? __kasan_check_read+0x11/0x20 [ 301.037838][ C1] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 301.043729][ C1] ? lock_downgrade+0x920/0x920 [ 301.048573][ C1] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 301.054921][ C1] ip6_rcv_finish+0x1de/0x2f0 [ 301.059597][ C1] ipv6_rcv+0x10e/0x420 [ 301.063752][ C1] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 301.069313][ C1] ? lock_downgrade+0x920/0x920 [ 301.074158][ C1] ? lock_downgrade+0x920/0x920 [ 301.079017][ C1] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 301.084908][ C1] ? trace_hardirqs_off+0x62/0x240 [ 301.090017][ C1] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 301.095476][ C1] __netif_receive_skb_one_core+0x113/0x1a0 [ 301.101396][ C1] ? __netif_receive_skb_core+0x3060/0x3060 [ 301.107320][ C1] ? lock_acquire+0x190/0x410 [ 301.111993][ C1] ? process_backlog+0x195/0x750 [ 301.116931][ C1] __netif_receive_skb+0x2c/0x1d0 [ 301.121957][ C1] process_backlog+0x206/0x750 [ 301.126715][ C1] ? lock_acquire+0x190/0x410 [ 301.131396][ C1] ? clockevents_program_event+0x15a/0x370 [ 301.137197][ C1] net_rx_action+0x508/0x10c0 [ 301.141880][ C1] ? napi_complete_done+0x4b0/0x4b0 [ 301.147071][ C1] ? sched_clock+0x2e/0x50 [ 301.151478][ C1] ? kvm_clock_read+0x18/0x30 [ 301.156146][ C1] ? inet_csk_listen_stop+0x1bc/0x850 [ 301.161514][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 301.167758][ C1] __do_softirq+0x262/0x98c [ 301.172282][ C1] ? inet_csk_listen_stop+0x1bc/0x850 [ 301.177661][ C1] do_softirq_own_stack+0x2a/0x40 [ 301.182679][ C1] [ 301.185631][ C1] do_softirq.part.0+0x11a/0x170 [ 301.190564][ C1] __local_bh_enable_ip+0x211/0x270 [ 301.195755][ C1] inet_csk_listen_stop+0x1e0/0x850 [ 301.200955][ C1] tcp_close+0xd5b/0x10e0 [ 301.205278][ C1] ? ip_mc_drop_socket+0x211/0x270 [ 301.210388][ C1] ? down_write+0xdf/0x150 [ 301.214813][ C1] inet_release+0xed/0x200 [ 301.219227][ C1] inet6_release+0x53/0x80 [ 301.223635][ C1] __sock_release+0xce/0x280 [ 301.228218][ C1] sock_close+0x1e/0x30 [ 301.232370][ C1] __fput+0x2ff/0x890 [ 301.236352][ C1] ? __sock_release+0x280/0x280 [ 301.241203][ C1] ____fput+0x16/0x20 [ 301.245179][ C1] task_work_run+0x145/0x1c0 [ 301.249773][ C1] exit_to_usermode_loop+0x316/0x380 [ 301.255059][ C1] do_syscall_64+0x65f/0x760 [ 301.259647][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 301.265532][ C1] RIP: 0033:0x406571 [ 301.269422][ 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 [ 301.289021][ C1] RSP: 002b:00007ffe1b5d6b70 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 301.297432][ C1] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000406571 [ 301.305398][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 301.313379][ C1] RBP: 00000000006dcc20 R08: 0000000000000140 R09: 0000000000000140 [ 301.321344][ C1] R10: 00007ffe1b5d6ba0 R11: 0000000000000293 R12: 00007ffe1b5d6bd0 [ 301.329305][ C1] R13: 00000000006dcc2c R14: 000000000000002d R15: 0000000000000007