[ 74.957842][ T27] audit: type=1800 audit(1564580419.474:27): pid=10179 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 75.002567][ T27] audit: type=1800 audit(1564580419.574:28): pid=10179 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. [ 75.811386][ T27] audit: type=1800 audit(1564580420.384:29): pid=10179 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 [ 75.836541][ T27] audit: type=1800 audit(1564580420.384:30): pid=10179 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 '10.128.0.24' (ECDSA) to the list of known hosts. syzkaller login: [ 198.834728][T10334] IPVS: ftp: loaded support on port[0] = 21 [ 198.883090][T10334] chnl_net:caif_netlink_parms(): no params data found [ 198.905947][T10334] bridge0: port 1(bridge_slave_0) entered blocking state [ 198.913250][T10334] bridge0: port 1(bridge_slave_0) entered disabled state [ 198.921110][T10334] device bridge_slave_0 entered promiscuous mode [ 198.928582][T10334] bridge0: port 2(bridge_slave_1) entered blocking state [ 198.935757][T10334] bridge0: port 2(bridge_slave_1) entered disabled state [ 198.943467][T10334] device bridge_slave_1 entered promiscuous mode [ 198.957517][T10334] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 198.968197][T10334] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 198.984357][T10334] team0: Port device team_slave_0 added [ 198.991407][T10334] team0: Port device team_slave_1 added [ 199.050927][T10334] device hsr_slave_0 entered promiscuous mode [ 199.119086][T10334] device hsr_slave_1 entered promiscuous mode [ 199.204532][T10334] bridge0: port 2(bridge_slave_1) entered blocking state [ 199.211652][T10334] bridge0: port 2(bridge_slave_1) entered forwarding state [ 199.219023][T10334] bridge0: port 1(bridge_slave_0) entered blocking state [ 199.226072][T10334] bridge0: port 1(bridge_slave_0) entered forwarding state [ 199.252627][T10334] 8021q: adding VLAN 0 to HW filter on device bond0 [ 199.263220][T10336] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 199.281984][T10336] bridge0: port 1(bridge_slave_0) entered disabled state [ 199.290569][T10336] bridge0: port 2(bridge_slave_1) entered disabled state [ 199.298341][T10336] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 199.309341][T10334] 8021q: adding VLAN 0 to HW filter on device team0 [ 199.320587][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 199.328925][ T5] bridge0: port 1(bridge_slave_0) entered blocking state [ 199.335996][ T5] bridge0: port 1(bridge_slave_0) entered forwarding state [ 199.343632][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 199.352523][ T5] bridge0: port 2(bridge_slave_1) entered blocking state [ 199.359618][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state [ 199.373533][T10336] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 199.382488][T10336] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 199.392472][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 199.405427][T10334] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 199.416459][T10334] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 199.428452][T10336] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 199.437156][T10336] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 199.445741][T10336] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 199.460779][T10334] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 199.493089][ C0] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 304.658842][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 304.665572][ C1] rcu: 1-...!: (1 GPs behind) idle=6de/1/0x4000000000000002 softirq=9983/9984 fqs=2 [ 304.675124][ C1] (t=10500 jiffies g=10497 q=4) [ 304.680093][ C1] rcu: rcu_preempt kthread starved for 10496 jiffies! g10497 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 [ 304.691457][ C1] rcu: RCU grace-period kthread stack dump: [ 304.697374][ C1] rcu_preempt I29120 10 2 0x80004000 [ 304.703829][ C1] Call Trace: [ 304.707320][ C1] __schedule+0x755/0x15b0 [ 304.711810][ C1] ? __sched_text_start+0x8/0x8 [ 304.716749][ C1] schedule+0xa8/0x270 [ 304.720938][ C1] schedule_timeout+0x486/0xc50 [ 304.725837][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 304.730832][ C1] ? usleep_range+0x170/0x170 [ 304.735628][ C1] ? trace_hardirqs_on+0x67/0x240 [ 304.740737][ C1] ? __kasan_check_read+0x11/0x20 [ 304.745850][ C1] ? __next_timer_interrupt+0x1a0/0x1a0 [ 304.751461][ C1] ? swake_up_one+0x60/0x60 [ 304.756000][ C1] rcu_gp_kthread+0x9b2/0x18c0 [ 304.760856][ C1] ? rcu_barrier+0x310/0x310 [ 304.765549][ C1] ? trace_hardirqs_on+0x67/0x240 [ 304.770611][ C1] ? __kasan_check_read+0x11/0x20 [ 304.775654][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 304.781905][ C1] ? __kthread_parkme+0x108/0x1c0 [ 304.786945][ C1] ? __kasan_check_read+0x11/0x20 [ 304.792002][ C1] kthread+0x361/0x430 [ 304.796070][ C1] ? rcu_barrier+0x310/0x310 [ 304.800681][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 304.806946][ C1] ret_from_fork+0x24/0x30 [ 304.811445][ C1] NMI backtrace for cpu 1 [ 304.815801][ C1] CPU: 1 PID: 10334 Comm: syz-executor246 Not tainted 5.3.0-rc2-next-20190731 #56 [ 304.825021][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 304.835148][ C1] Call Trace: [ 304.838490][ C1] [ 304.841451][ C1] dump_stack+0x172/0x1f0 [ 304.845847][ C1] nmi_cpu_backtrace.cold+0x70/0xb2 [ 304.851102][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 304.857457][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 304.863111][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 304.869150][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 304.875110][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 304.880247][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 304.885864][ C1] ? raise_softirq+0x138/0x340 [ 304.890674][ C1] update_process_times+0x32/0x80 [ 304.895777][ C1] tick_sched_handle+0xa2/0x190 [ 304.900655][ C1] tick_sched_timer+0x53/0x140 [ 304.905467][ C1] __hrtimer_run_queues+0x364/0xe40 [ 304.910710][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 304.916056][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 304.921646][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 304.927434][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 304.933585][ C1] hrtimer_interrupt+0x314/0x770 [ 304.938608][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 304.944210][ C1] apic_timer_interrupt+0xf/0x20 [ 304.949184][ C1] RIP: 0010:check_memory_region+0x123/0x1a0 [ 304.955184][ C1] Code: 49 89 d9 49 29 c1 e9 68 ff ff ff 5b b8 01 00 00 00 41 5c 41 5d 5d c3 4d 85 c9 74 ef 4d 01 e1 eb 09 48 83 c0 01 4c 39 c8 74 e1 <80> 38 00 74 f2 eb 8c 4d 39 c2 74 4d e8 7c e4 ff ff 31 c0 5b 41 5c [ 304.975037][ C1] RSP: 0018:ffff8880ae9091d8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 304.983583][ C1] RAX: ffffed1011eb4c21 RBX: ffffed1011eb4c22 RCX: ffffffff8158f467 [ 304.991651][ C1] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88808f5a6108 [ 304.999692][ C1] RBP: ffff8880ae9091f0 R08: 1ffff11011eb4c21 R09: ffffed1011eb4c22 [ 305.007703][ C1] R10: ffffed1011eb4c21 R11: ffff88808f5a610b R12: ffffed1011eb4c21 [ 305.015729][ C1] R13: 0000000000000003 R14: ffffed1011eb4c21 R15: 0000000000000001 [ 305.023808][ C1] ? apic_timer_interrupt+0xa/0x20 [ 305.030036][ C1] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 305.036426][ C1] __kasan_check_read+0x11/0x20 [ 305.041347][ C1] native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 305.047598][ C1] ? __pv_queued_spin_lock_slowpath+0xd10/0xd10 [ 305.053929][ C1] ? mark_held_locks+0xf0/0xf0 [ 305.058758][ C1] do_raw_spin_lock+0x20e/0x2e0 [ 305.063654][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 305.068656][ C1] ? lock_acquire+0x190/0x410 [ 305.076791][ C1] ? release_sock+0x20/0x1c0 [ 305.081779][ C1] ? __kasan_check_read+0x11/0x20 [ 305.086909][ C1] _raw_spin_lock_bh+0x3b/0x50 [ 305.091733][ C1] ? release_sock+0x20/0x1c0 [ 305.096373][ C1] release_sock+0x20/0x1c0 [ 305.100917][ C1] wait_on_pending_writer+0x20f/0x420 [ 305.106368][ C1] ? ip6_rcv_finish+0x1de/0x2f0 [ 305.111319][ C1] ? tls_init+0x560/0x560 [ 305.115716][ C1] ? process_backlog+0x206/0x750 [ 305.120703][ C1] ? net_rx_action+0x508/0x10c0 [ 305.125622][ C1] ? __do_softirq+0x262/0x98c [ 305.130372][ C1] ? prepare_to_wait_exclusive+0x320/0x320 [ 305.136209][ C1] ? inet_release+0xed/0x200 [ 305.140875][ C1] ? inet6_release+0x53/0x80 [ 305.145529][ C1] ? __sock_release+0xce/0x280 [ 305.150376][ C1] ? sock_close+0x1e/0x30 [ 305.154769][ C1] ? __fput+0x2ff/0x890 [ 305.160412][ C1] ? ____fput+0x16/0x20 [ 305.164622][ C1] ? task_work_run+0x145/0x1c0 [ 305.169436][ C1] ? exit_to_usermode_loop+0x316/0x380 [ 305.174951][ C1] tls_sk_proto_cleanup+0x2c5/0x3e0 [ 305.180198][ C1] ? wait_on_pending_writer+0x420/0x420 [ 305.185902][ C1] tls_sk_proto_unhash+0x90/0x3f0 [ 305.190968][ C1] tcp_set_state+0x5b9/0x7d0 [ 305.195588][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 305.201906][ C1] ? __sk_mem_reduce_allocated+0x1b0/0x560 [ 305.207811][ C1] ? tcp_alloc_md5sig_pool+0x4a0/0x4a0 [ 305.213370][ C1] ? __sk_mem_reclaim+0x55/0x70 [ 305.218295][ C1] ? tcp_write_queue_purge+0x5d8/0x1310 [ 305.223918][ C1] ? inet6_sk_rx_dst_set+0x244/0x6f0 [ 305.229273][ C1] tcp_done+0xe2/0x320 [ 305.233413][ C1] tcp_reset+0x132/0x500 [ 305.237695][ C1] tcp_validate_incoming+0xa2d/0x1660 [ 305.243148][ C1] tcp_rcv_established+0x6b5/0x1e70 [ 305.248407][ C1] ? mark_held_locks+0xf0/0xf0 [ 305.253254][ C1] ? sk_filter_trim_cap+0x45f/0xb30 [ 305.258554][ C1] ? tcp_data_queue+0x4860/0x4860 [ 305.263635][ C1] ? do_raw_spin_lock+0x12a/0x2e0 [ 305.268778][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 305.273761][ C1] ? lock_acquire+0x190/0x410 [ 305.278581][ C1] tcp_v6_do_rcv+0x41e/0x12c0 [ 305.283344][ C1] tcp_v6_rcv+0x31f1/0x3500 [ 305.287956][ C1] ? tcp_v6_syn_recv_sock+0x2290/0x2290 [ 305.293595][ C1] ? nf_confirm+0x360/0x4d0 [ 305.298177][ C1] ? mark_held_locks+0xf0/0xf0 [ 305.302976][ C1] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 305.308702][ C1] ip6_input_finish+0x84/0x170 [ 305.313528][ C1] ip6_input+0xe4/0x3f0 [ 305.317759][ C1] ? ip6_input_finish+0x170/0x170 [ 305.322874][ C1] ? __kasan_check_read+0x11/0x20 [ 305.327998][ C1] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 305.333964][ C1] ? lock_downgrade+0x920/0x920 [ 305.338903][ C1] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 305.345222][ C1] ip6_rcv_finish+0x1de/0x2f0 [ 305.350008][ C1] ipv6_rcv+0x10e/0x420 [ 305.354228][ C1] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 305.359768][ C1] ? lock_downgrade+0x920/0x920 [ 305.364711][ C1] ? lock_downgrade+0x920/0x920 [ 305.369619][ C1] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 305.375604][ C1] ? trace_hardirqs_off+0x62/0x240 [ 305.380823][ C1] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 305.386374][ C1] __netif_receive_skb_one_core+0x113/0x1a0 [ 305.392407][ C1] ? __netif_receive_skb_core+0x3060/0x3060 [ 305.398390][ C1] ? lock_acquire+0x190/0x410 [ 305.403124][ C1] ? process_backlog+0x195/0x750 [ 305.408113][ C1] __netif_receive_skb+0x2c/0x1d0 [ 305.413219][ C1] process_backlog+0x206/0x750 [ 305.418088][ C1] ? lock_acquire+0x190/0x410 [ 305.423038][ C1] ? clockevents_program_event+0x15a/0x370 [ 305.428935][ C1] net_rx_action+0x508/0x10c0 [ 305.433872][ C1] ? napi_complete_done+0x4b0/0x4b0 [ 305.439152][ C1] ? sched_clock+0x2e/0x50 [ 305.443662][ C1] ? kvm_clock_read+0x18/0x30 [ 305.448437][ C1] ? inet_csk_listen_stop+0x1bc/0x850 [ 305.453912][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 305.460235][ C1] __do_softirq+0x262/0x98c [ 305.464838][ C1] ? inet_csk_listen_stop+0x1bc/0x850 [ 305.470278][ C1] do_softirq_own_stack+0x2a/0x40 [ 305.475335][ C1] [ 305.478318][ C1] do_softirq.part.0+0x11a/0x170 [ 305.483373][ C1] __local_bh_enable_ip+0x211/0x270 [ 305.488607][ C1] inet_csk_listen_stop+0x1e0/0x850 [ 305.493845][ C1] tcp_close+0xd5b/0x10e0 [ 305.498231][ C1] ? ip_mc_drop_socket+0x211/0x270 [ 305.503383][ C1] ? down_write+0xdf/0x150 [ 305.507879][ C1] inet_release+0xed/0x200 [ 305.512357][ C1] inet6_release+0x53/0x80 [ 305.516838][ C1] __sock_release+0xce/0x280 [ 305.521477][ C1] sock_close+0x1e/0x30 [ 305.525735][ C1] __fput+0x2ff/0x890 [ 305.529770][ C1] ? __sock_release+0x280/0x280 [ 305.534659][ C1] ____fput+0x16/0x20 [ 305.538678][ C1] task_work_run+0x145/0x1c0 [ 305.543299][ C1] exit_to_usermode_loop+0x316/0x380 [ 305.548621][ C1] do_syscall_64+0x65f/0x760 [ 305.553231][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 305.559187][ C1] RIP: 0033:0x406571 [ 305.563148][ 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 [ 305.582788][ C1] RSP: 002b:00007ffe9bc7f570 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 305.591315][ C1] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000406571 [ 305.599397][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 305.607444][ C1] RBP: 00000000006dcc20 R08: 0000000000000140 R09: 0000000000000140 [ 305.615504][ C1] R10: 00007ffe9bc7f5a0 R11: 0000000000000293 R12: 00007ffe9bc7f5d0 [ 305.623554][ C1] R13: 00000000006dcc2c R14: 000000000000002d R15: 0000000000000007