[ 72.761986][ T26] audit: type=1800 audit(1564220176.960:27): pid=10068 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 72.785379][ T26] audit: type=1800 audit(1564220176.970:28): pid=10068 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. [ 73.595682][ T26] audit: type=1800 audit(1564220177.860:29): pid=10068 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 [ 73.616348][ T26] audit: type=1800 audit(1564220177.860:30): pid=10068 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 '10.128.0.76' (ECDSA) to the list of known hosts. syzkaller login: [ 183.637888][T10223] IPVS: ftp: loaded support on port[0] = 21 [ 183.683317][T10223] chnl_net:caif_netlink_parms(): no params data found [ 183.706264][T10223] bridge0: port 1(bridge_slave_0) entered blocking state [ 183.713487][T10223] bridge0: port 1(bridge_slave_0) entered disabled state [ 183.721042][T10223] device bridge_slave_0 entered promiscuous mode [ 183.728483][T10223] bridge0: port 2(bridge_slave_1) entered blocking state [ 183.735619][T10223] bridge0: port 2(bridge_slave_1) entered disabled state [ 183.743187][T10223] device bridge_slave_1 entered promiscuous mode [ 183.757508][T10223] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 183.767956][T10223] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 183.784344][T10223] team0: Port device team_slave_0 added [ 183.790788][T10223] team0: Port device team_slave_1 added [ 183.873387][T10223] device hsr_slave_0 entered promiscuous mode [ 183.932037][T10223] device hsr_slave_1 entered promiscuous mode [ 184.007718][T10223] bridge0: port 2(bridge_slave_1) entered blocking state [ 184.014806][T10223] bridge0: port 2(bridge_slave_1) entered forwarding state [ 184.022191][T10223] bridge0: port 1(bridge_slave_0) entered blocking state [ 184.029423][T10223] bridge0: port 1(bridge_slave_0) entered forwarding state [ 184.056290][T10223] 8021q: adding VLAN 0 to HW filter on device bond0 [ 184.067052][ T2966] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 184.085486][ T2966] bridge0: port 1(bridge_slave_0) entered disabled state [ 184.093076][ T2966] bridge0: port 2(bridge_slave_1) entered disabled state [ 184.100634][ T2966] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 184.111191][T10223] 8021q: adding VLAN 0 to HW filter on device team0 [ 184.120165][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 184.128843][ T17] bridge0: port 1(bridge_slave_0) entered blocking state [ 184.135919][ T17] bridge0: port 1(bridge_slave_0) entered forwarding state [ 184.152603][T10225] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 184.161119][T10225] bridge0: port 2(bridge_slave_1) entered blocking state [ 184.168200][T10225] bridge0: port 2(bridge_slave_1) entered forwarding state [ 184.176376][T10225] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 184.184796][T10225] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 184.193736][ T2966] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 184.203637][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready executing program [ 184.215021][T10223] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 184.226117][T10223] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 184.234194][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 184.250172][T10223] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 184.281344][ C1] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 289.441797][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 289.448495][ C1] rcu: 1-....: (1 GPs behind) idle=9be/1/0x4000000000000002 softirq=10164/10165 fqs=5250 [ 289.458452][ C1] (t=10502 jiffies g=10369 q=192) [ 289.463545][ C1] NMI backtrace for cpu 1 [ 289.468219][ C1] CPU: 1 PID: 10223 Comm: syz-executor212 Not tainted 5.3.0-rc1-next-20190726 #53 [ 289.477386][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 289.487436][ C1] Call Trace: [ 289.490711][ C1] [ 289.493686][ C1] dump_stack+0x172/0x1f0 [ 289.498015][ C1] nmi_cpu_backtrace.cold+0x70/0xb2 [ 289.503229][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 289.509471][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 289.515094][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 289.521068][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 289.526953][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 289.532073][ C1] ? find_next_bit+0x107/0x130 [ 289.536830][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 289.542463][ C1] ? raise_softirq+0x138/0x340 [ 289.547227][ C1] update_process_times+0x32/0x80 [ 289.552247][ C1] tick_sched_handle+0xa2/0x190 [ 289.557089][ C1] tick_sched_timer+0x53/0x140 [ 289.561845][ C1] __hrtimer_run_queues+0x364/0xe40 [ 289.567037][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 289.572321][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 289.577861][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 289.583573][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 289.589641][ C1] hrtimer_interrupt+0x314/0x770 [ 289.594597][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 289.600145][ C1] apic_timer_interrupt+0xf/0x20 [ 289.605084][ C1] RIP: 0010:native_queued_spin_lock_slowpath+0x130/0x9f0 [ 289.612139][ C1] Code: 08 00 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 90 e9 73 ff ff ff 8b 45 98 4c 8d 65 d8 3d 00 01 00 00 0f 84 e5 [ 289.631737][ C1] RSP: 0018:ffff8880ae909210 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 [ 289.640170][ C1] RAX: 0000000000000000 RBX: ffff8880a7594108 RCX: ffffffff8159a3d7 [ 289.648131][ C1] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880a7594108 [ 289.656087][ C1] RBP: ffff8880ae9092d0 R08: 1ffff11014eb2821 R09: ffffed1014eb2822 [ 289.664052][ C1] R10: ffffed1014eb2821 R11: ffff8880a759410b R12: 0000000000000001 [ 289.672190][ C1] R13: 0000000000000003 R14: ffffed1014eb2821 R15: 0000000000000001 [ 289.680173][ C1] ? apic_timer_interrupt+0xa/0x20 [ 289.685284][ C1] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 289.691611][ C1] ? __pv_queued_spin_lock_slowpath+0xd10/0xd10 [ 289.697844][ C1] ? mark_held_locks+0xf0/0xf0 [ 289.702606][ C1] do_raw_spin_lock+0x20e/0x2e0 [ 289.707462][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 289.712394][ C1] ? lock_acquire+0x190/0x410 [ 289.717091][ C1] ? release_sock+0x20/0x1c0 [ 289.721692][ C1] ? __kasan_check_read+0x11/0x20 [ 289.726712][ C1] _raw_spin_lock_bh+0x3b/0x50 [ 289.731463][ C1] ? release_sock+0x20/0x1c0 [ 289.736041][ C1] release_sock+0x20/0x1c0 [ 289.740471][ C1] wait_on_pending_writer+0x20f/0x420 [ 289.745842][ C1] ? ip6_rcv_finish+0x1de/0x2f0 [ 289.750698][ C1] ? tls_init+0x560/0x560 [ 289.755022][ C1] ? process_backlog+0x206/0x750 [ 289.759946][ C1] ? net_rx_action+0x508/0x10c0 [ 289.764784][ C1] ? __do_softirq+0x262/0x98c [ 289.769454][ C1] ? prepare_to_wait_exclusive+0x320/0x320 [ 289.775250][ C1] ? inet_release+0xed/0x200 [ 289.779830][ C1] ? inet6_release+0x53/0x80 [ 289.784408][ C1] ? __sock_release+0xce/0x280 [ 289.789158][ C1] ? sock_close+0x1e/0x30 [ 289.793490][ C1] ? __fput+0x2ff/0x890 [ 289.797635][ C1] ? ____fput+0x16/0x20 [ 289.801781][ C1] ? task_work_run+0x145/0x1c0 [ 289.806552][ C1] ? exit_to_usermode_loop+0x316/0x380 [ 289.812009][ C1] tls_sk_proto_cleanup+0x2c5/0x3e0 [ 289.817197][ C1] ? wait_on_pending_writer+0x420/0x420 [ 289.822753][ C1] tls_sk_proto_unhash+0x90/0x3f0 [ 289.827797][ C1] tcp_set_state+0x5b9/0x7d0 [ 289.832385][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 289.838624][ C1] ? __sk_mem_reduce_allocated+0x1b0/0x560 [ 289.844417][ C1] ? tcp_alloc_md5sig_pool+0x4a0/0x4a0 [ 289.849864][ C1] ? __sk_mem_reclaim+0x55/0x70 [ 289.854707][ C1] ? tcp_write_queue_purge+0x5d8/0x1310 [ 289.860254][ C1] ? inet6_sk_rx_dst_set+0x244/0x6f0 [ 289.865527][ C1] tcp_done+0xe2/0x320 [ 289.869589][ C1] tcp_reset+0x132/0x500 [ 289.873826][ C1] tcp_validate_incoming+0xa2d/0x1660 [ 289.879194][ C1] tcp_rcv_established+0x6b5/0x1e70 [ 289.884387][ C1] ? mark_held_locks+0xf0/0xf0 [ 289.889151][ C1] ? sk_filter_trim_cap+0x45f/0xb30 [ 289.894340][ C1] ? tcp_data_queue+0x4860/0x4860 [ 289.899355][ C1] ? do_raw_spin_lock+0x12a/0x2e0 [ 289.904369][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 289.909299][ C1] ? lock_acquire+0x190/0x410 [ 289.913978][ C1] tcp_v6_do_rcv+0x41e/0x12c0 [ 289.918648][ C1] tcp_v6_rcv+0x31f1/0x3500 [ 289.923150][ C1] ? tcp_v6_syn_recv_sock+0x2290/0x2290 [ 289.928701][ C1] ? nf_confirm+0x360/0x4d0 [ 289.933201][ C1] ? mark_held_locks+0xf0/0xf0 [ 289.937964][ C1] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 289.943597][ C1] ip6_input_finish+0x84/0x170 [ 289.948365][ C1] ip6_input+0xe4/0x3f0 [ 289.952507][ C1] ? ip6_input_finish+0x170/0x170 [ 289.957521][ C1] ? __kasan_check_read+0x11/0x20 [ 289.962550][ C1] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 289.968432][ C1] ? lock_downgrade+0x920/0x920 [ 289.973271][ C1] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 289.979505][ C1] ip6_rcv_finish+0x1de/0x2f0 [ 289.984174][ C1] ipv6_rcv+0x10e/0x420 [ 289.988331][ C1] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 289.993778][ C1] ? lock_downgrade+0x920/0x920 [ 289.998622][ C1] ? lock_downgrade+0x920/0x920 [ 290.003465][ C1] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 290.009360][ C1] ? trace_hardirqs_off+0x62/0x240 [ 290.014466][ C1] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 290.019923][ C1] __netif_receive_skb_one_core+0x113/0x1a0 [ 290.025825][ C1] ? __netif_receive_skb_core+0x3060/0x3060 [ 290.031725][ C1] ? lock_acquire+0x190/0x410 [ 290.036407][ C1] ? process_backlog+0x195/0x750 [ 290.041343][ C1] __netif_receive_skb+0x2c/0x1d0 [ 290.046359][ C1] process_backlog+0x206/0x750 [ 290.051117][ C1] ? lock_acquire+0x190/0x410 [ 290.055787][ C1] ? clockevents_program_event+0x15a/0x370 [ 290.061587][ C1] net_rx_action+0x508/0x10c0 [ 290.066257][ C1] ? napi_complete_done+0x4b0/0x4b0 [ 290.071443][ C1] ? sched_clock+0x2e/0x50 [ 290.075858][ C1] ? kvm_clock_read+0x18/0x30 [ 290.080542][ C1] ? inet_csk_listen_stop+0x1bc/0x850 [ 290.085909][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 290.092150][ C1] __do_softirq+0x262/0x98c [ 290.096650][ C1] ? inet_csk_listen_stop+0x1bc/0x850 [ 290.102019][ C1] do_softirq_own_stack+0x2a/0x40 [ 290.107025][ C1] [ 290.109958][ C1] do_softirq.part.0+0x11a/0x170 [ 290.114886][ C1] __local_bh_enable_ip+0x211/0x270 [ 290.120086][ C1] inet_csk_listen_stop+0x1e0/0x850 [ 290.125279][ C1] tcp_close+0xd5b/0x10e0 [ 290.129601][ C1] ? ip_mc_drop_socket+0x211/0x270 [ 290.134701][ C1] ? down_write+0xdf/0x150 [ 290.139129][ C1] inet_release+0xed/0x200 [ 290.143538][ C1] inet6_release+0x53/0x80 [ 290.147945][ C1] __sock_release+0xce/0x280 [ 290.152521][ C1] sock_close+0x1e/0x30 [ 290.156670][ C1] __fput+0x2ff/0x890 [ 290.160654][ C1] ? __sock_release+0x280/0x280 [ 290.165495][ C1] ____fput+0x16/0x20 [ 290.169469][ C1] task_work_run+0x145/0x1c0 [ 290.174078][ C1] exit_to_usermode_loop+0x316/0x380 [ 290.179356][ C1] do_syscall_64+0x65f/0x760 [ 290.183940][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 290.189874][ C1] RIP: 0033:0x406571 [ 290.193768][ 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 [ 290.213359][ C1] RSP: 002b:00007ffc16766df0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 290.221761][ C1] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000406571 [ 290.229723][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 290.237684][ C1] RBP: 00000000006dcc20 R08: 0000000000000140 R09: 0000000000000140 [ 290.245649][ C1] R10: 00007ffc16766e20 R11: 0000000000000293 R12: 00007ffc16766e50 [ 290.253615][ C1] R13: 00000000006dcc2c R14: 000000000000002d R15: 0000000000000007