[ 77.910983][ T27] audit: type=1800 audit(1564561970.021:27): pid=10280 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 77.933401][ T27] audit: type=1800 audit(1564561970.021:28): pid=10280 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. [ 78.602275][ T27] audit: type=1800 audit(1564561970.781:29): pid=10280 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 [ 78.624932][ T27] audit: type=1800 audit(1564561970.791:30): pid=10280 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 '10.128.15.229' (ECDSA) to the list of known hosts. syzkaller login: [ 187.924828][T10436] IPVS: ftp: loaded support on port[0] = 21 [ 187.972467][T10436] chnl_net:caif_netlink_parms(): no params data found [ 187.995878][T10436] bridge0: port 1(bridge_slave_0) entered blocking state [ 188.004506][T10436] bridge0: port 1(bridge_slave_0) entered disabled state [ 188.013435][T10436] device bridge_slave_0 entered promiscuous mode [ 188.021834][T10436] bridge0: port 2(bridge_slave_1) entered blocking state [ 188.030350][T10436] bridge0: port 2(bridge_slave_1) entered disabled state [ 188.038882][T10436] device bridge_slave_1 entered promiscuous mode [ 188.054685][T10436] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 188.066404][T10436] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 188.083745][T10436] team0: Port device team_slave_0 added [ 188.092850][T10436] team0: Port device team_slave_1 added [ 188.144584][T10436] device hsr_slave_0 entered promiscuous mode [ 188.183084][T10436] device hsr_slave_1 entered promiscuous mode [ 188.228843][T10436] bridge0: port 2(bridge_slave_1) entered blocking state [ 188.236621][T10436] bridge0: port 2(bridge_slave_1) entered forwarding state [ 188.244863][T10436] bridge0: port 1(bridge_slave_0) entered blocking state [ 188.253256][T10436] bridge0: port 1(bridge_slave_0) entered forwarding state [ 188.281156][T10436] 8021q: adding VLAN 0 to HW filter on device bond0 [ 188.294676][T10438] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 188.306550][T10438] bridge0: port 1(bridge_slave_0) entered disabled state [ 188.316534][T10438] bridge0: port 2(bridge_slave_1) entered disabled state [ 188.325011][T10438] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 188.336863][T10436] 8021q: adding VLAN 0 to HW filter on device team0 [ 188.347117][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 188.358353][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 188.366439][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 188.384872][T10440] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 188.398674][T10440] bridge0: port 2(bridge_slave_1) entered blocking state [ 188.407494][T10440] bridge0: port 2(bridge_slave_1) entered forwarding state [ 188.417288][T10440] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 188.427577][T10440] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 188.437734][T10440] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 188.451136][T10436] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 188.463384][T10436] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 188.476523][T10438] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready executing program [ 188.486765][T10438] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 188.497435][T10438] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 188.513612][T10436] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 188.552568][ C0] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 293.722732][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 293.729626][ C0] rcu: 0-...!: (1 GPs behind) idle=aea/1/0x4000000000000002 softirq=10351/10352 fqs=3 [ 293.739900][ C0] (t=10501 jiffies g=11109 q=6) [ 293.745052][ C0] rcu: rcu_preempt kthread starved for 10496 jiffies! g11109 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 293.756496][ C0] rcu: RCU grace-period kthread stack dump: [ 293.762610][ C0] rcu_preempt I29120 10 2 0x80004000 [ 293.769967][ C0] Call Trace: [ 293.773490][ C0] __schedule+0x755/0x15b0 [ 293.777930][ C0] ? __sched_text_start+0x8/0x8 [ 293.782807][ C0] schedule+0xa8/0x270 [ 293.786902][ C0] schedule_timeout+0x486/0xc50 [ 293.791851][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 293.796828][ C0] ? usleep_range+0x170/0x170 [ 293.802590][ C0] ? trace_hardirqs_on+0x67/0x240 [ 293.809663][ C0] ? __kasan_check_read+0x11/0x20 [ 293.815244][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 293.820818][ C0] ? swake_up_one+0x60/0x60 [ 293.825360][ C0] rcu_gp_kthread+0x9b2/0x18c0 [ 293.830145][ C0] ? rcu_barrier+0x310/0x310 [ 293.834770][ C0] ? trace_hardirqs_on+0x67/0x240 [ 293.839806][ C0] ? __kasan_check_read+0x11/0x20 [ 293.845379][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 293.851722][ C0] ? __kthread_parkme+0x108/0x1c0 [ 293.856782][ C0] ? __kasan_check_read+0x11/0x20 [ 293.861828][ C0] kthread+0x361/0x430 [ 293.865909][ C0] ? rcu_barrier+0x310/0x310 [ 293.872432][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 293.878693][ C0] ret_from_fork+0x24/0x30 [ 293.883302][ C0] NMI backtrace for cpu 0 [ 293.887652][ C0] CPU: 0 PID: 10436 Comm: syz-executor130 Not tainted 5.3.0-rc2-next-20190730 #55 [ 293.896942][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 293.907007][ C0] Call Trace: [ 293.910319][ C0] [ 293.913195][ C0] dump_stack+0x172/0x1f0 [ 293.917554][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 293.922791][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 293.929075][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 293.934741][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 293.940742][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 293.946666][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 293.951817][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 293.957461][ C0] ? raise_softirq+0x138/0x340 [ 293.962239][ C0] update_process_times+0x32/0x80 [ 293.967280][ C0] tick_sched_handle+0xa2/0x190 [ 293.972145][ C0] tick_sched_timer+0x53/0x140 [ 293.977105][ C0] __hrtimer_run_queues+0x364/0xe40 [ 293.982317][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 293.987627][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 293.993446][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 293.999556][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 294.005752][ C0] hrtimer_interrupt+0x314/0x770 [ 294.010821][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 294.016384][ C0] apic_timer_interrupt+0xf/0x20 [ 294.021337][ C0] RIP: 0010:native_queued_spin_lock_slowpath+0x132/0x9f0 [ 294.028653][ 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 [ 294.048268][ C0] RSP: 0018:ffff8880ae809210 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 [ 294.056689][ C0] RAX: 0000000000000000 RBX: ffff8880a107ad08 RCX: ffffffff8158f237 [ 294.064706][ C0] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880a107ad08 [ 294.072683][ C0] RBP: ffff8880ae8092d0 R08: 1ffff1101420f5a1 R09: ffffed101420f5a2 [ 294.080665][ C0] R10: ffffed101420f5a1 R11: ffff8880a107ad0b R12: 0000000000000001 [ 294.088654][ C0] R13: 0000000000000003 R14: ffffed101420f5a1 R15: 0000000000000001 [ 294.096666][ C0] ? apic_timer_interrupt+0xa/0x20 [ 294.101801][ C0] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 294.108151][ C0] ? __pv_queued_spin_lock_slowpath+0xd10/0xd10 [ 294.114489][ C0] ? mark_held_locks+0xf0/0xf0 [ 294.119268][ C0] do_raw_spin_lock+0x20e/0x2e0 [ 294.124132][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 294.129086][ C0] ? lock_acquire+0x190/0x410 [ 294.133807][ C0] ? release_sock+0x20/0x1c0 [ 294.138408][ C0] ? __kasan_check_read+0x11/0x20 [ 294.143791][ C0] _raw_spin_lock_bh+0x3b/0x50 [ 294.148564][ C0] ? release_sock+0x20/0x1c0 [ 294.153162][ C0] release_sock+0x20/0x1c0 [ 294.157633][ C0] wait_on_pending_writer+0x20f/0x420 [ 294.163234][ C0] ? ip6_rcv_finish+0x1de/0x2f0 [ 294.168096][ C0] ? tls_init+0x560/0x560 [ 294.172517][ C0] ? process_backlog+0x206/0x750 [ 294.177744][ C0] ? net_rx_action+0x508/0x10c0 [ 294.182609][ C0] ? __do_softirq+0x262/0x98c [ 294.187304][ C0] ? prepare_to_wait_exclusive+0x320/0x320 [ 294.193123][ C0] ? inet_release+0xed/0x200 [ 294.197725][ C0] ? inet6_release+0x53/0x80 [ 294.202330][ C0] ? __sock_release+0xce/0x280 [ 294.207121][ C0] ? sock_close+0x1e/0x30 [ 294.211471][ C0] ? __fput+0x2ff/0x890 [ 294.215634][ C0] ? ____fput+0x16/0x20 [ 294.219809][ C0] ? task_work_run+0x145/0x1c0 [ 294.224595][ C0] ? exit_to_usermode_loop+0x316/0x380 [ 294.230074][ C0] tls_sk_proto_cleanup+0x2c5/0x3e0 [ 294.235285][ C0] ? wait_on_pending_writer+0x420/0x420 [ 294.240852][ C0] tls_sk_proto_unhash+0x90/0x3f0 [ 294.245893][ C0] tcp_set_state+0x5b9/0x7d0 [ 294.250592][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 294.256881][ C0] ? __sk_mem_reduce_allocated+0x1b0/0x560 [ 294.262703][ C0] ? tcp_alloc_md5sig_pool+0x4a0/0x4a0 [ 294.268174][ C0] ? __sk_mem_reclaim+0x55/0x70 [ 294.273035][ C0] ? tcp_write_queue_purge+0x5d8/0x1310 [ 294.278982][ C0] ? inet6_sk_rx_dst_set+0x244/0x6f0 [ 294.284285][ C0] tcp_done+0xe2/0x320 [ 294.288545][ C0] tcp_reset+0x132/0x500 [ 294.292919][ C0] tcp_validate_incoming+0xa2d/0x1660 [ 294.298590][ C0] tcp_rcv_established+0x6b5/0x1e70 [ 294.304323][ C0] ? mark_held_locks+0xf0/0xf0 [ 294.309224][ C0] ? sk_filter_trim_cap+0x45f/0xb30 [ 294.314436][ C0] ? tcp_data_queue+0x4860/0x4860 [ 294.319474][ C0] ? do_raw_spin_lock+0x12a/0x2e0 [ 294.324518][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 294.329464][ C0] ? lock_acquire+0x190/0x410 [ 294.334207][ C0] tcp_v6_do_rcv+0x41e/0x12c0 [ 294.339009][ C0] tcp_v6_rcv+0x31f1/0x3500 [ 294.343546][ C0] ? tcp_v6_syn_recv_sock+0x2290/0x2290 [ 294.350091][ C0] ? nf_confirm+0x360/0x4d0 [ 294.354626][ C0] ? mark_held_locks+0xf0/0xf0 [ 294.359411][ C0] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 294.365068][ C0] ip6_input_finish+0x84/0x170 [ 294.369934][ C0] ip6_input+0xe4/0x3f0 [ 294.374191][ C0] ? ip6_input_finish+0x170/0x170 [ 294.379231][ C0] ? __kasan_check_read+0x11/0x20 [ 294.384284][ C0] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 294.390193][ C0] ? lock_downgrade+0x920/0x920 [ 294.395057][ C0] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 294.401401][ C0] ip6_rcv_finish+0x1de/0x2f0 [ 294.406092][ C0] ipv6_rcv+0x10e/0x420 [ 294.410263][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 294.415753][ C0] ? lock_downgrade+0x920/0x920 [ 294.420609][ C0] ? lock_downgrade+0x920/0x920 [ 294.425658][ C0] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 294.431734][ C0] ? trace_hardirqs_off+0x62/0x240 [ 294.436867][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 294.442466][ C0] __netif_receive_skb_one_core+0x113/0x1a0 [ 294.448415][ C0] ? __netif_receive_skb_core+0x3060/0x3060 [ 294.454413][ C0] ? lock_acquire+0x190/0x410 [ 294.459195][ C0] ? process_backlog+0x195/0x750 [ 294.464145][ C0] __netif_receive_skb+0x2c/0x1d0 [ 294.469193][ C0] process_backlog+0x206/0x750 [ 294.473971][ C0] ? lock_acquire+0x190/0x410 [ 294.478676][ C0] ? clockevents_program_event+0x15a/0x370 [ 294.484498][ C0] net_rx_action+0x508/0x10c0 [ 294.489211][ C0] ? napi_complete_done+0x4b0/0x4b0 [ 294.494416][ C0] ? sched_clock+0x2e/0x50 [ 294.498864][ C0] ? kvm_clock_read+0x18/0x30 [ 294.503578][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 294.509015][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 294.515266][ C0] __do_softirq+0x262/0x98c [ 294.519977][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 294.525358][ C0] do_softirq_own_stack+0x2a/0x40 [ 294.530473][ C0] [ 294.533459][ C0] do_softirq.part.0+0x11a/0x170 [ 294.538686][ C0] __local_bh_enable_ip+0x211/0x270 [ 294.544266][ C0] inet_csk_listen_stop+0x1e0/0x850 [ 294.549496][ C0] tcp_close+0xd5b/0x10e0 [ 294.554195][ C0] ? ip_mc_drop_socket+0x211/0x270 [ 294.559636][ C0] ? down_write+0xdf/0x150 [ 294.564120][ C0] inet_release+0xed/0x200 [ 294.568776][ C0] inet6_release+0x53/0x80 [ 294.573573][ C0] __sock_release+0xce/0x280 [ 294.578187][ C0] sock_close+0x1e/0x30 [ 294.582399][ C0] __fput+0x2ff/0x890 [ 294.586714][ C0] ? __sock_release+0x280/0x280 [ 294.592062][ C0] ____fput+0x16/0x20 [ 294.596799][ C0] task_work_run+0x145/0x1c0 [ 294.601745][ C0] exit_to_usermode_loop+0x316/0x380 [ 294.607809][ C0] do_syscall_64+0x65f/0x760 [ 294.612439][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 294.618688][ C0] RIP: 0033:0x406571 [ 294.622822][ 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 [ 294.643221][ C0] RSP: 002b:00007ffcf421e280 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 294.651665][ C0] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000406571 [ 294.659906][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 294.668860][ C0] RBP: 00000000006dcc20 R08: 0000000000000140 R09: 0000000000000140 [ 294.679968][ C0] R10: 00007ffcf421e2b0 R11: 0000000000000293 R12: 00007ffcf421e2e0 [ 294.689273][ C0] R13: 00000000006dcc2c R14: 000000000000002d R15: 0000000000000007