[ 69.892332][ T27] audit: type=1800 audit(1564130239.515:27): pid=10091 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 69.918853][ T27] audit: type=1800 audit(1564130239.525:28): pid=10091 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. [ 70.658404][ T27] audit: type=1800 audit(1564130240.355:29): pid=10091 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 [ 70.678886][ T27] audit: type=1800 audit(1564130240.355:30): pid=10091 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: [ 175.581751][T10245] IPVS: ftp: loaded support on port[0] = 21 [ 175.630932][T10245] chnl_net:caif_netlink_parms(): no params data found [ 175.651484][T10245] bridge0: port 1(bridge_slave_0) entered blocking state [ 175.658653][T10245] bridge0: port 1(bridge_slave_0) entered disabled state [ 175.666140][T10245] device bridge_slave_0 entered promiscuous mode [ 175.673495][T10245] bridge0: port 2(bridge_slave_1) entered blocking state [ 175.680599][T10245] bridge0: port 2(bridge_slave_1) entered disabled state [ 175.688341][T10245] device bridge_slave_1 entered promiscuous mode [ 175.701728][T10245] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 175.712116][T10245] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 175.728507][T10245] team0: Port device team_slave_0 added [ 175.734993][T10245] team0: Port device team_slave_1 added [ 175.808401][T10245] device hsr_slave_0 entered promiscuous mode [ 175.877046][T10245] device hsr_slave_1 entered promiscuous mode [ 175.962271][T10245] bridge0: port 2(bridge_slave_1) entered blocking state [ 175.969549][T10245] bridge0: port 2(bridge_slave_1) entered forwarding state [ 175.976921][T10245] bridge0: port 1(bridge_slave_0) entered blocking state [ 175.983996][T10245] bridge0: port 1(bridge_slave_0) entered forwarding state [ 176.009234][T10245] 8021q: adding VLAN 0 to HW filter on device bond0 [ 176.020060][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 176.028290][ T17] bridge0: port 1(bridge_slave_0) entered disabled state [ 176.045991][ T17] bridge0: port 2(bridge_slave_1) entered disabled state [ 176.053778][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 176.064348][T10245] 8021q: adding VLAN 0 to HW filter on device team0 [ 176.073556][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 176.081863][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 176.088908][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 176.098513][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 176.107040][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 176.114111][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 176.128179][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 176.138231][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 176.145966][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 176.157841][T10245] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 176.168533][T10245] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 176.180321][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 176.188893][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 176.197066][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 176.211133][T10245] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 176.240451][ C1] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 281.406723][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 281.413550][ C0] rcu: 0-...!: (1 GPs behind) idle=aa2/1/0x4000000000000002 softirq=10685/10686 fqs=2 [ 281.423396][ C0] (t=10501 jiffies g=10621 q=7) [ 281.428435][ C0] rcu: rcu_preempt kthread starved for 10498 jiffies! g10621 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 281.439794][ C0] rcu: RCU grace-period kthread stack dump: [ 281.445776][ C0] rcu_preempt I29520 10 2 0x80004000 [ 281.452360][ C0] Call Trace: [ 281.455679][ C0] __schedule+0x755/0x1580 [ 281.460112][ C0] ? __sched_text_start+0x8/0x8 [ 281.465334][ C0] schedule+0xa8/0x270 [ 281.469415][ C0] schedule_timeout+0x486/0xc50 [ 281.474410][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 281.479360][ C0] ? usleep_range+0x170/0x170 [ 281.484232][ C0] ? trace_hardirqs_on+0x67/0x240 [ 281.489352][ C0] ? __kasan_check_read+0x11/0x20 [ 281.494704][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 281.500437][ C0] ? swake_up_one+0x60/0x60 [ 281.505118][ C0] rcu_gp_kthread+0x9b2/0x18c0 [ 281.510000][ C0] ? rcu_barrier+0x310/0x310 [ 281.514709][ C0] ? trace_hardirqs_on+0x67/0x240 [ 281.520063][ C0] ? __kasan_check_read+0x11/0x20 [ 281.525385][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 281.531785][ C0] ? __kthread_parkme+0x108/0x1c0 [ 281.537047][ C0] ? __kasan_check_read+0x11/0x20 [ 281.542317][ C0] kthread+0x361/0x430 [ 281.546429][ C0] ? rcu_barrier+0x310/0x310 [ 281.551114][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 281.557596][ C0] ret_from_fork+0x24/0x30 [ 281.562370][ C0] NMI backtrace for cpu 0 [ 281.566710][ C0] CPU: 0 PID: 10245 Comm: syz-executor904 Not tainted 5.3.0-rc1-next-20190725 #52 [ 281.576081][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 281.587419][ C0] Call Trace: [ 281.590899][ C0] [ 281.593880][ C0] dump_stack+0x172/0x1f0 [ 281.598518][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 281.603743][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 281.610206][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 281.615850][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 281.621842][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 281.627968][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 281.633135][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 281.638692][ C0] ? raise_softirq+0x138/0x340 [ 281.643467][ C0] update_process_times+0x32/0x80 [ 281.648601][ C0] tick_sched_handle+0xa2/0x190 [ 281.653467][ C0] tick_sched_timer+0x53/0x140 [ 281.658261][ C0] __hrtimer_run_queues+0x364/0xe40 [ 281.663568][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 281.669379][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 281.674941][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 281.680823][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 281.687042][ C0] hrtimer_interrupt+0x314/0x770 [ 281.691996][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 281.697636][ C0] apic_timer_interrupt+0xf/0x20 [ 281.702828][ C0] RIP: 0010:check_memory_region+0x22/0x1a0 [ 281.709144][ C0] Code: 0f 1f 84 00 00 00 00 00 48 85 f6 0f 84 34 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 55 0f b6 d2 48 39 c7 48 89 e5 41 55 41 54 53 <0f> 86 07 01 00 00 4c 8d 5c 37 ff 49 89 f8 48 b8 00 00 00 00 00 fc [ 281.729721][ C0] RSP: 0018:ffff8880ae8091d8 EFLAGS: 00000216 ORIG_RAX: ffffffffffffff13 [ 281.738279][ C0] RAX: ffff7fffffffffff RBX: ffff8880a9b3ed08 RCX: ffffffff81599777 [ 281.746550][ C0] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880a9b3ed08 [ 281.754619][ C0] RBP: ffff8880ae8091f0 R08: 1ffff11015367da1 R09: ffffed1015367da2 [ 281.762599][ C0] R10: ffffed1015367da1 R11: ffff8880a9b3ed0b R12: 0000000000000001 [ 281.770664][ C0] R13: 0000000000000003 R14: ffffed1015367da1 R15: 0000000000000001 [ 281.778789][ C0] ? apic_timer_interrupt+0xa/0x20 [ 281.784149][ C0] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 281.790496][ C0] __kasan_check_read+0x11/0x20 [ 281.795399][ C0] native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 281.801841][ C0] ? __pv_queued_spin_lock_slowpath+0xd10/0xd10 [ 281.808451][ C0] ? mark_held_locks+0xf0/0xf0 [ 281.813313][ C0] do_raw_spin_lock+0x20e/0x2e0 [ 281.818474][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 281.823797][ C0] ? lock_acquire+0x190/0x410 [ 281.828483][ C0] ? release_sock+0x20/0x1c0 [ 281.833387][ C0] ? __kasan_check_read+0x11/0x20 [ 281.838507][ C0] _raw_spin_lock_bh+0x3b/0x50 [ 281.843650][ C0] ? release_sock+0x20/0x1c0 [ 281.848255][ C0] release_sock+0x20/0x1c0 [ 281.852836][ C0] wait_on_pending_writer+0x20f/0x420 [ 281.858382][ C0] ? ip6_rcv_finish+0x1de/0x2f0 [ 281.863731][ C0] ? tls_init+0x560/0x560 [ 281.868302][ C0] ? process_backlog+0x206/0x750 [ 281.873291][ C0] ? net_rx_action+0x508/0x10c0 [ 281.878149][ C0] ? __do_softirq+0x262/0x98c [ 281.882839][ C0] ? prepare_to_wait_exclusive+0x320/0x320 [ 281.888820][ C0] ? inet_release+0xed/0x200 [ 281.893547][ C0] ? inet6_release+0x53/0x80 [ 281.898146][ C0] ? __sock_release+0xce/0x280 [ 281.903358][ C0] ? sock_close+0x1e/0x30 [ 281.908008][ C0] ? __fput+0x2ff/0x890 [ 281.912164][ C0] ? ____fput+0x16/0x20 [ 281.916329][ C0] ? task_work_run+0x145/0x1c0 [ 281.921194][ C0] ? exit_to_usermode_loop+0x316/0x380 [ 281.926835][ C0] tls_sk_proto_cleanup+0x2c5/0x3e0 [ 281.932313][ C0] ? wait_on_pending_writer+0x420/0x420 [ 281.938427][ C0] tls_sk_proto_unhash+0x90/0x3f0 [ 281.943792][ C0] tcp_set_state+0x5b9/0x7d0 [ 281.948591][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 281.954845][ C0] ? __sk_mem_reduce_allocated+0x190/0x560 [ 281.960780][ C0] ? tcp_alloc_md5sig_pool+0x4a0/0x4a0 [ 281.966423][ C0] ? __sk_mem_reclaim+0x55/0x70 [ 281.971458][ C0] ? tcp_write_queue_purge+0x5d8/0x1310 [ 281.977174][ C0] ? inet6_sk_rx_dst_set+0x244/0x6f0 [ 281.982581][ C0] tcp_done+0xe2/0x320 [ 281.986826][ C0] tcp_reset+0x132/0x500 [ 281.991317][ C0] tcp_validate_incoming+0xa2d/0x1660 [ 281.996704][ C0] tcp_rcv_established+0x6b5/0x1e70 [ 282.002007][ C0] ? mark_held_locks+0xf0/0xf0 [ 282.007391][ C0] ? sk_filter_trim_cap+0x45f/0xb30 [ 282.013252][ C0] ? tcp_data_queue+0x4860/0x4860 [ 282.018739][ C0] ? do_raw_spin_lock+0x12a/0x2e0 [ 282.023771][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 282.028751][ C0] ? lock_acquire+0x190/0x410 [ 282.033826][ C0] tcp_v6_do_rcv+0x41e/0x12c0 [ 282.038520][ C0] tcp_v6_rcv+0x31f1/0x3500 [ 282.043163][ C0] ? tcp_v6_syn_recv_sock+0x2290/0x2290 [ 282.048716][ C0] ? nf_confirm+0x360/0x4d0 [ 282.053232][ C0] ? mark_held_locks+0xf0/0xf0 [ 282.058185][ C0] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 282.063859][ C0] ip6_input_finish+0x84/0x170 [ 282.068830][ C0] ip6_input+0xe4/0x3f0 [ 282.073213][ C0] ? ip6_input_finish+0x170/0x170 [ 282.078398][ C0] ? __kasan_check_read+0x11/0x20 [ 282.083435][ C0] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 282.089629][ C0] ? lock_downgrade+0x920/0x920 [ 282.094500][ C0] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 282.100877][ C0] ip6_rcv_finish+0x1de/0x2f0 [ 282.105560][ C0] ipv6_rcv+0x10e/0x420 [ 282.109913][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 282.115488][ C0] ? lock_downgrade+0x920/0x920 [ 282.120353][ C0] ? lock_downgrade+0x920/0x920 [ 282.125360][ C0] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 282.131265][ C0] ? trace_hardirqs_off+0x62/0x240 [ 282.136564][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 282.142039][ C0] __netif_receive_skb_one_core+0x113/0x1a0 [ 282.147954][ C0] ? __netif_receive_skb_core+0x3060/0x3060 [ 282.153865][ C0] ? lock_acquire+0x190/0x410 [ 282.158553][ C0] ? process_backlog+0x195/0x750 [ 282.163510][ C0] __netif_receive_skb+0x2c/0x1d0 [ 282.168544][ C0] process_backlog+0x206/0x750 [ 282.173312][ C0] ? lock_acquire+0x190/0x410 [ 282.177991][ C0] ? clockevents_program_event+0x15a/0x370 [ 282.183796][ C0] net_rx_action+0x508/0x10c0 [ 282.188473][ C0] ? napi_complete_done+0x4b0/0x4b0 [ 282.193668][ C0] ? sched_clock+0x2e/0x50 [ 282.198081][ C0] ? kvm_clock_read+0x18/0x30 [ 282.202791][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 282.208168][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 282.214414][ C0] __do_softirq+0x262/0x98c [ 282.218917][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 282.224288][ C0] do_softirq_own_stack+0x2a/0x40 [ 282.229296][ C0] [ 282.232228][ C0] do_softirq.part.0+0x11a/0x170 [ 282.237159][ C0] __local_bh_enable_ip+0x211/0x270 [ 282.242351][ C0] inet_csk_listen_stop+0x1e0/0x850 [ 282.247542][ C0] tcp_close+0xd5b/0x10e0 [ 282.251954][ C0] ? ip_mc_drop_socket+0x211/0x270 [ 282.257150][ C0] ? down_write+0xdf/0x150 [ 282.261561][ C0] inet_release+0xed/0x200 [ 282.265978][ C0] inet6_release+0x53/0x80 [ 282.270395][ C0] __sock_release+0xce/0x280 [ 282.274976][ C0] sock_close+0x1e/0x30 [ 282.279122][ C0] __fput+0x2ff/0x890 [ 282.283095][ C0] ? __sock_release+0x280/0x280 [ 282.287938][ C0] ____fput+0x16/0x20 [ 282.291913][ C0] task_work_run+0x145/0x1c0 [ 282.296511][ C0] exit_to_usermode_loop+0x316/0x380 [ 282.301792][ C0] do_syscall_64+0x65f/0x760 [ 282.306379][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 282.312290][ C0] RIP: 0033:0x406571 [ 282.316180][ 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 [ 282.335789][ C0] RSP: 002b:00007fff16585030 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 282.344211][ C0] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000406571 [ 282.352178][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 282.360144][ C0] RBP: 00000000006dcc20 R08: 0000000000000140 R09: 0000000000000140 [ 282.368105][ C0] R10: 00007fff16585060 R11: 0000000000000293 R12: 00007fff16585090 [ 282.376075][ C0] R13: 00000000006dcc2c R14: 000000000000002d R15: 0000000000000007