[ 69.505890][ T26] audit: type=1800 audit(1564615782.023:27): pid=10002 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 69.526772][ T26] audit: type=1800 audit(1564615782.023:28): pid=10002 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. [ 70.283183][ T26] audit: type=1800 audit(1564615782.873:29): pid=10002 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 [ 70.303384][ T26] audit: type=1800 audit(1564615782.873:30): pid=10002 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 '10.128.0.240' (ECDSA) to the list of known hosts. syzkaller login: [ 188.420517][T10155] IPVS: ftp: loaded support on port[0] = 21 [ 188.465799][T10155] chnl_net:caif_netlink_parms(): no params data found [ 188.488077][T10155] bridge0: port 1(bridge_slave_0) entered blocking state [ 188.495547][T10155] bridge0: port 1(bridge_slave_0) entered disabled state [ 188.503148][T10155] device bridge_slave_0 entered promiscuous mode [ 188.510815][T10155] bridge0: port 2(bridge_slave_1) entered blocking state [ 188.518188][T10155] bridge0: port 2(bridge_slave_1) entered disabled state [ 188.526123][T10155] device bridge_slave_1 entered promiscuous mode [ 188.540408][T10155] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 188.551172][T10155] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 188.567725][T10155] team0: Port device team_slave_0 added [ 188.574531][T10155] team0: Port device team_slave_1 added [ 188.637238][T10155] device hsr_slave_0 entered promiscuous mode [ 188.705624][T10155] device hsr_slave_1 entered promiscuous mode [ 188.791281][T10155] bridge0: port 2(bridge_slave_1) entered blocking state [ 188.798448][T10155] bridge0: port 2(bridge_slave_1) entered forwarding state [ 188.805852][T10155] bridge0: port 1(bridge_slave_0) entered blocking state [ 188.812899][T10155] bridge0: port 1(bridge_slave_0) entered forwarding state [ 188.838614][T10155] 8021q: adding VLAN 0 to HW filter on device bond0 [ 188.849931][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 188.868764][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 188.876495][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 188.884294][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 188.894840][T10155] 8021q: adding VLAN 0 to HW filter on device team0 [ 188.904575][ T2591] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 188.913236][ T2591] bridge0: port 1(bridge_slave_0) entered blocking state [ 188.920349][ T2591] bridge0: port 1(bridge_slave_0) entered forwarding state [ 188.935852][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 188.944187][ T12] bridge0: port 2(bridge_slave_1) entered blocking state [ 188.951309][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state [ 188.959518][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 188.968758][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 188.978321][ T2591] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 188.991190][T10155] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 189.002113][T10155] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 189.014983][ T2591] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 189.024170][ T2591] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 189.032971][ T2591] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 189.048164][T10155] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 189.078870][ C0] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 294.235356][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 294.242093][ C1] rcu: 1-...!: (10499 ticks this GP) idle=a02/1/0x4000000000000002 softirq=10494/10494 fqs=2 [ 294.252418][ C1] (t=10501 jiffies g=10197 q=4) [ 294.257369][ C1] rcu: rcu_preempt kthread starved for 10498 jiffies! g10197 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 294.268546][ C1] rcu: RCU grace-period kthread stack dump: [ 294.274434][ C1] rcu_preempt R running task 29528 10 2 0x80004000 [ 294.282365][ C1] Call Trace: [ 294.285792][ C1] __schedule+0x755/0x15b0 [ 294.290224][ C1] ? __sched_text_start+0x8/0x8 [ 294.295088][ C1] schedule+0xa8/0x270 [ 294.299159][ C1] schedule_timeout+0x486/0xc50 [ 294.304080][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 294.309036][ C1] ? usleep_range+0x170/0x170 [ 294.313794][ C1] ? trace_hardirqs_on+0x67/0x240 [ 294.318865][ C1] ? __kasan_check_read+0x11/0x20 [ 294.323924][ C1] ? __next_timer_interrupt+0x1a0/0x1a0 [ 294.329509][ C1] ? swake_up_one+0x60/0x60 [ 294.334050][ C1] rcu_gp_kthread+0x9b2/0x18c0 [ 294.338825][ C1] ? rcu_barrier+0x310/0x310 [ 294.343424][ C1] ? trace_hardirqs_on+0x67/0x240 [ 294.348450][ C1] ? __kasan_check_read+0x11/0x20 [ 294.353531][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 294.359808][ C1] ? __kthread_parkme+0x108/0x1c0 [ 294.364823][ C1] ? __kasan_check_read+0x11/0x20 [ 294.369843][ C1] kthread+0x361/0x430 [ 294.373910][ C1] ? rcu_barrier+0x310/0x310 [ 294.378509][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 294.384747][ C1] ret_from_fork+0x24/0x30 [ 294.389245][ C1] NMI backtrace for cpu 1 [ 294.393600][ C1] CPU: 1 PID: 10155 Comm: syz-executor346 Not tainted 5.3.0-rc2-next-20190731 #56 [ 294.402814][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 294.412862][ C1] Call Trace: [ 294.416135][ C1] [ 294.419051][ C1] dump_stack+0x172/0x1f0 [ 294.423379][ C1] nmi_cpu_backtrace.cold+0x70/0xb2 [ 294.428574][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 294.434919][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 294.440557][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 294.446537][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 294.452424][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 294.457535][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 294.463121][ C1] ? raise_softirq+0x138/0x340 [ 294.467887][ C1] update_process_times+0x32/0x80 [ 294.472967][ C1] tick_sched_handle+0xa2/0x190 [ 294.477818][ C1] tick_sched_timer+0x53/0x140 [ 294.482585][ C1] __hrtimer_run_queues+0x364/0xe40 [ 294.487779][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 294.493060][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 294.498607][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 294.504404][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 294.510473][ C1] hrtimer_interrupt+0x314/0x770 [ 294.515417][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 294.520962][ C1] apic_timer_interrupt+0xf/0x20 [ 294.525899][ C1] RIP: 0010:native_queued_spin_lock_slowpath+0x132/0x9f0 [ 294.532936][ C1] 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 [ 294.552547][ C1] RSP: 0018:ffff8880ae909210 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 [ 294.560958][ C1] RAX: 0000000000000000 RBX: ffff8880a903ad08 RCX: ffffffff8158f467 [ 294.568936][ C1] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880a903ad08 [ 294.576907][ C1] RBP: ffff8880ae9092d0 R08: 1ffff110152075a1 R09: ffffed10152075a2 [ 294.584881][ C1] R10: ffffed10152075a1 R11: ffff8880a903ad0b R12: 0000000000000001 [ 294.592850][ C1] R13: 0000000000000003 R14: ffffed10152075a1 R15: 0000000000000001 [ 294.600837][ C1] ? apic_timer_interrupt+0xa/0x20 [ 294.605962][ C1] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 294.612302][ C1] ? __pv_queued_spin_lock_slowpath+0xd10/0xd10 [ 294.618546][ C1] ? mark_held_locks+0xf0/0xf0 [ 294.623311][ C1] do_raw_spin_lock+0x20e/0x2e0 [ 294.628157][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 294.633089][ C1] ? lock_acquire+0x190/0x410 [ 294.637843][ C1] ? release_sock+0x20/0x1c0 [ 294.642431][ C1] ? __kasan_check_read+0x11/0x20 [ 294.647459][ C1] _raw_spin_lock_bh+0x3b/0x50 [ 294.652219][ C1] ? release_sock+0x20/0x1c0 [ 294.656806][ C1] release_sock+0x20/0x1c0 [ 294.661303][ C1] wait_on_pending_writer+0x20f/0x420 [ 294.666734][ C1] ? ip6_rcv_finish+0x1de/0x2f0 [ 294.671585][ C1] ? tls_init+0x560/0x560 [ 294.675981][ C1] ? process_backlog+0x206/0x750 [ 294.680918][ C1] ? net_rx_action+0x508/0x10c0 [ 294.685769][ C1] ? __do_softirq+0x262/0x98c [ 294.690465][ C1] ? prepare_to_wait_exclusive+0x320/0x320 [ 294.696345][ C1] ? inet_release+0xed/0x200 [ 294.700937][ C1] ? inet6_release+0x53/0x80 [ 294.705585][ C1] ? __sock_release+0xce/0x280 [ 294.710350][ C1] ? sock_close+0x1e/0x30 [ 294.714738][ C1] ? __fput+0x2ff/0x890 [ 294.718896][ C1] ? ____fput+0x16/0x20 [ 294.723083][ C1] ? task_work_run+0x145/0x1c0 [ 294.727894][ C1] ? exit_to_usermode_loop+0x316/0x380 [ 294.733357][ C1] tls_sk_proto_cleanup+0x2c5/0x3e0 [ 294.738563][ C1] ? wait_on_pending_writer+0x420/0x420 [ 294.744111][ C1] tls_sk_proto_unhash+0x90/0x3f0 [ 294.749286][ C1] tcp_set_state+0x5b9/0x7d0 [ 294.753877][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 294.760117][ C1] ? __sk_mem_reduce_allocated+0x1b0/0x560 [ 294.765931][ C1] ? tcp_alloc_md5sig_pool+0x4a0/0x4a0 [ 294.771396][ C1] ? __sk_mem_reclaim+0x55/0x70 [ 294.776250][ C1] ? tcp_write_queue_purge+0x5d8/0x1310 [ 294.781866][ C1] ? inet6_sk_rx_dst_set+0x244/0x6f0 [ 294.787153][ C1] tcp_done+0xe2/0x320 [ 294.791219][ C1] tcp_reset+0x132/0x500 [ 294.795457][ C1] tcp_validate_incoming+0xa2d/0x1660 [ 294.800832][ C1] tcp_rcv_established+0x6b5/0x1e70 [ 294.806030][ C1] ? mark_held_locks+0xf0/0xf0 [ 294.810858][ C1] ? sk_filter_trim_cap+0x45f/0xb30 [ 294.816059][ C1] ? tcp_data_queue+0x4860/0x4860 [ 294.821078][ C1] ? do_raw_spin_lock+0x12a/0x2e0 [ 294.826100][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 294.831033][ C1] ? lock_acquire+0x190/0x410 [ 294.835710][ C1] tcp_v6_do_rcv+0x41e/0x12c0 [ 294.840387][ C1] tcp_v6_rcv+0x31f1/0x3500 [ 294.844928][ C1] ? tcp_v6_syn_recv_sock+0x2290/0x2290 [ 294.850541][ C1] ? nf_confirm+0x360/0x4d0 [ 294.855042][ C1] ? mark_held_locks+0xf0/0xf0 [ 294.859803][ C1] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 294.865440][ C1] ip6_input_finish+0x84/0x170 [ 294.870196][ C1] ip6_input+0xe4/0x3f0 [ 294.874345][ C1] ? ip6_input_finish+0x170/0x170 [ 294.879363][ C1] ? __kasan_check_read+0x11/0x20 [ 294.884383][ C1] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 294.890269][ C1] ? lock_downgrade+0x920/0x920 [ 294.895113][ C1] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 294.902060][ C1] ip6_rcv_finish+0x1de/0x2f0 [ 294.906735][ C1] ipv6_rcv+0x10e/0x420 [ 294.910886][ C1] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 294.916337][ C1] ? lock_downgrade+0x920/0x920 [ 294.921194][ C1] ? lock_downgrade+0x920/0x920 [ 294.926046][ C1] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 294.931975][ C1] ? trace_hardirqs_off+0x62/0x240 [ 294.937097][ C1] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 294.942555][ C1] __netif_receive_skb_one_core+0x113/0x1a0 [ 294.948537][ C1] ? __netif_receive_skb_core+0x3060/0x3060 [ 294.954429][ C1] ? lock_acquire+0x190/0x410 [ 294.964491][ C1] ? process_backlog+0x195/0x750 [ 294.969968][ C1] __netif_receive_skb+0x2c/0x1d0 [ 294.974988][ C1] process_backlog+0x206/0x750 [ 294.979749][ C1] ? lock_acquire+0x190/0x410 [ 294.984432][ C1] ? clockevents_program_event+0x15a/0x370 [ 294.990242][ C1] net_rx_action+0x508/0x10c0 [ 294.994924][ C1] ? napi_complete_done+0x4b0/0x4b0 [ 295.000169][ C1] ? sched_clock+0x2e/0x50 [ 295.004617][ C1] ? kvm_clock_read+0x18/0x30 [ 295.009347][ C1] ? inet_csk_listen_stop+0x1bc/0x850 [ 295.014716][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 295.020959][ C1] __do_softirq+0x262/0x98c [ 295.025469][ C1] ? inet_csk_listen_stop+0x1bc/0x850 [ 295.030841][ C1] do_softirq_own_stack+0x2a/0x40 [ 295.035852][ C1] [ 295.038785][ C1] do_softirq.part.0+0x11a/0x170 [ 295.044059][ C1] __local_bh_enable_ip+0x211/0x270 [ 295.049259][ C1] inet_csk_listen_stop+0x1e0/0x850 [ 295.054458][ C1] tcp_close+0xd5b/0x10e0 [ 295.058793][ C1] ? ip_mc_drop_socket+0x211/0x270 [ 295.063907][ C1] ? down_write+0xdf/0x150 [ 295.068331][ C1] inet_release+0xed/0x200 [ 295.072747][ C1] inet6_release+0x53/0x80 [ 295.077165][ C1] __sock_release+0xce/0x280 [ 295.081755][ C1] sock_close+0x1e/0x30 [ 295.085907][ C1] __fput+0x2ff/0x890 [ 295.089888][ C1] ? __sock_release+0x280/0x280 [ 295.094736][ C1] ____fput+0x16/0x20 [ 295.098715][ C1] task_work_run+0x145/0x1c0 [ 295.103303][ C1] exit_to_usermode_loop+0x316/0x380 [ 295.108587][ C1] do_syscall_64+0x65f/0x760 [ 295.113194][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 295.119102][ C1] RIP: 0033:0x406571 [ 295.122994][ 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 [ 295.142596][ C1] RSP: 002b:00007ffec102ab10 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 295.151006][ C1] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000406571 [ 295.158986][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 295.166953][ C1] RBP: 00000000006dcc20 R08: 0000000000000140 R09: 0000000000000140 [ 295.174918][ C1] R10: 00007ffec102ab40 R11: 0000000000000293 R12: 00007ffec102ab70 [ 295.182887][ C1] R13: 00000000006dcc2c R14: 000000000000002d R15: 0000000000000007