[ 74.480406][ T26] audit: type=1800 audit(1564121145.698:29): pid=10394 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 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.170' (ECDSA) to the list of known hosts. syzkaller login: [ 163.991084][T10550] IPVS: ftp: loaded support on port[0] = 21 [ 164.033861][T10550] chnl_net:caif_netlink_parms(): no params data found [ 164.058434][T10550] bridge0: port 1(bridge_slave_0) entered blocking state [ 164.067171][T10550] bridge0: port 1(bridge_slave_0) entered disabled state [ 164.075973][T10550] device bridge_slave_0 entered promiscuous mode [ 164.083754][T10550] bridge0: port 2(bridge_slave_1) entered blocking state [ 164.091494][T10550] bridge0: port 2(bridge_slave_1) entered disabled state [ 164.099765][T10550] device bridge_slave_1 entered promiscuous mode [ 164.114087][T10550] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 164.124925][T10550] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 164.142429][T10550] team0: Port device team_slave_0 added [ 164.149695][T10550] team0: Port device team_slave_1 added [ 164.224823][T10550] device hsr_slave_0 entered promiscuous mode [ 164.263706][T10550] device hsr_slave_1 entered promiscuous mode [ 164.318867][T10550] bridge0: port 2(bridge_slave_1) entered blocking state [ 164.326035][T10550] bridge0: port 2(bridge_slave_1) entered forwarding state [ 164.333353][T10550] bridge0: port 1(bridge_slave_0) entered blocking state [ 164.340385][T10550] bridge0: port 1(bridge_slave_0) entered forwarding state [ 164.366750][T10550] 8021q: adding VLAN 0 to HW filter on device bond0 [ 164.377659][ T3516] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 164.397522][ T3516] bridge0: port 1(bridge_slave_0) entered disabled state [ 164.405396][ T3516] bridge0: port 2(bridge_slave_1) entered disabled state [ 164.413506][ T3516] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 164.423796][T10550] 8021q: adding VLAN 0 to HW filter on device team0 [ 164.433884][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 164.443314][ T17] bridge0: port 1(bridge_slave_0) entered blocking state [ 164.450466][ T17] bridge0: port 1(bridge_slave_0) entered forwarding state [ 164.460272][T10552] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 164.468960][T10552] bridge0: port 2(bridge_slave_1) entered blocking state [ 164.476570][T10552] bridge0: port 2(bridge_slave_1) entered forwarding state [ 164.490960][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 164.499602][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 164.509661][T10552] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready executing program [ 164.520693][T10554] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 164.531362][T10552] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 164.541172][T10550] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 164.557358][T10550] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 164.586482][ C1] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 269.753110][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 269.759821][ C0] rcu: 0-...!: (1 GPs behind) idle=742/1/0x4000000000000002 softirq=10289/10290 fqs=2 [ 269.769549][ C0] (t=10501 jiffies g=11157 q=5) [ 269.774586][ C0] rcu: rcu_preempt kthread starved for 10498 jiffies! g11157 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 269.786144][ C0] rcu: RCU grace-period kthread stack dump: [ 269.792044][ C0] rcu_preempt I29320 10 2 0x80004000 [ 269.798396][ C0] Call Trace: [ 269.801734][ C0] __schedule+0x755/0x1580 [ 269.806206][ C0] ? __sched_text_start+0x8/0x8 [ 269.811088][ C0] schedule+0xa8/0x270 [ 269.815179][ C0] schedule_timeout+0x486/0xc50 [ 269.820051][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 269.825040][ C0] ? usleep_range+0x170/0x170 [ 269.829739][ C0] ? trace_hardirqs_on+0x67/0x240 [ 269.834793][ C0] ? __kasan_check_read+0x11/0x20 [ 269.839836][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 269.845398][ C0] ? swake_up_one+0x60/0x60 [ 269.849932][ C0] rcu_gp_kthread+0x9b2/0x18c0 [ 269.854731][ C0] ? rcu_barrier+0x310/0x310 [ 269.859336][ C0] ? trace_hardirqs_on+0x67/0x240 [ 269.864394][ C0] ? __kasan_check_read+0x11/0x20 [ 269.869451][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 269.875706][ C0] ? __kthread_parkme+0x108/0x1c0 [ 269.880750][ C0] ? __kasan_check_read+0x11/0x20 [ 269.885795][ C0] kthread+0x361/0x430 [ 269.889874][ C0] ? rcu_barrier+0x310/0x310 [ 269.894474][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 269.900739][ C0] ret_from_fork+0x24/0x30 [ 269.905212][ C0] NMI backtrace for cpu 0 [ 269.909568][ C0] CPU: 0 PID: 10550 Comm: syz-executor167 Not tainted 5.3.0-rc1-next-20190725 #52 [ 269.918773][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 269.928858][ C0] Call Trace: [ 269.932152][ C0] [ 269.935028][ C0] dump_stack+0x172/0x1f0 [ 269.939386][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 269.944606][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 269.950859][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 269.956503][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 269.962514][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 269.968458][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 269.973591][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 269.979165][ C0] ? raise_softirq+0x138/0x340 [ 269.983951][ C0] update_process_times+0x32/0x80 [ 269.989167][ C0] tick_sched_handle+0xa2/0x190 [ 269.994204][ C0] tick_sched_timer+0x53/0x140 [ 269.998992][ C0] __hrtimer_run_queues+0x364/0xe40 [ 270.004214][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 270.009696][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 270.015257][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 270.020989][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 270.027083][ C0] hrtimer_interrupt+0x314/0x770 [ 270.032235][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 270.037810][ C0] apic_timer_interrupt+0xf/0x20 [ 270.042761][ C0] RIP: 0010:__kasan_check_read+0x0/0x20 [ 270.048321][ C0] Code: e8 f9 85 af ff 0f 0b 4c 8b 4d d0 e9 27 ee ff ff 48 8b 73 58 89 c2 48 c7 c7 88 8e 89 88 f7 da e8 da 85 af ff e9 da ee ff ff 90 <55> 89 f6 31 d2 48 89 e5 48 8b 4d 08 e8 cf 26 00 00 5d c3 0f 1f 00 [ 270.068204][ C0] RSP: 0018:ffff8880ae809208 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 [ 270.076661][ C0] RAX: 0000000000000000 RBX: ffff88808e838d48 RCX: ffffffff81599777 [ 270.084690][ C0] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88808e838d48 [ 270.092700][ C0] RBP: ffff8880ae8092d0 R08: 1ffff11011d071a9 R09: ffffed1011d071aa [ 270.100731][ C0] R10: ffffed1011d071a9 R11: ffff88808e838d4b R12: 0000000000000001 [ 270.108714][ C0] R13: 0000000000000003 R14: ffffed1011d071a9 R15: 0000000000000001 [ 270.116719][ C0] ? apic_timer_interrupt+0xa/0x20 [ 270.121855][ C0] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 270.128211][ C0] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 270.134558][ C0] ? __pv_queued_spin_lock_slowpath+0xd10/0xd10 [ 270.140835][ C0] ? mark_held_locks+0xf0/0xf0 [ 270.145823][ C0] do_raw_spin_lock+0x20e/0x2e0 [ 270.150690][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 270.155653][ C0] ? lock_acquire+0x190/0x410 [ 270.160335][ C0] ? release_sock+0x20/0x1c0 [ 270.164939][ C0] ? __kasan_check_read+0x11/0x20 [ 270.169972][ C0] _raw_spin_lock_bh+0x3b/0x50 [ 270.174739][ C0] ? release_sock+0x20/0x1c0 [ 270.179336][ C0] release_sock+0x20/0x1c0 [ 270.183761][ C0] wait_on_pending_writer+0x20f/0x420 [ 270.189154][ C0] ? ip6_rcv_finish+0x1de/0x2f0 [ 270.194018][ C0] ? tls_init+0x560/0x560 [ 270.198353][ C0] ? process_backlog+0x206/0x750 [ 270.203382][ C0] ? net_rx_action+0x508/0x10c0 [ 270.208264][ C0] ? __do_softirq+0x262/0x98c [ 270.212970][ C0] ? prepare_to_wait_exclusive+0x320/0x320 [ 270.218810][ C0] ? inet_release+0xed/0x200 [ 270.223426][ C0] ? inet6_release+0x53/0x80 [ 270.228036][ C0] ? __sock_release+0xce/0x280 [ 270.232840][ C0] ? sock_close+0x1e/0x30 [ 270.237204][ C0] ? __fput+0x2ff/0x890 [ 270.241360][ C0] ? ____fput+0x16/0x20 [ 270.245524][ C0] ? task_work_run+0x145/0x1c0 [ 270.250300][ C0] ? exit_to_usermode_loop+0x316/0x380 [ 270.255772][ C0] tls_sk_proto_cleanup+0x2c5/0x3e0 [ 270.260997][ C0] ? wait_on_pending_writer+0x420/0x420 [ 270.266561][ C0] tls_sk_proto_unhash+0x90/0x3f0 [ 270.271616][ C0] tcp_set_state+0x5b9/0x7d0 [ 270.276213][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 270.282548][ C0] ? __sk_mem_reduce_allocated+0x190/0x560 [ 270.288365][ C0] ? tcp_alloc_md5sig_pool+0x4a0/0x4a0 [ 270.293850][ C0] ? __sk_mem_reclaim+0x55/0x70 [ 270.298710][ C0] ? tcp_write_queue_purge+0x5d8/0x1310 [ 270.304270][ C0] ? inet6_sk_rx_dst_set+0x244/0x6f0 [ 270.309568][ C0] tcp_done+0xe2/0x320 [ 270.313638][ C0] tcp_reset+0x132/0x500 [ 270.318089][ C0] tcp_validate_incoming+0xa2d/0x1660 [ 270.323490][ C0] tcp_rcv_established+0x6b5/0x1e70 [ 270.328702][ C0] ? mark_held_locks+0xf0/0xf0 [ 270.333472][ C0] ? sk_filter_trim_cap+0x45f/0xb30 [ 270.338686][ C0] ? tcp_data_queue+0x4860/0x4860 [ 270.343717][ C0] ? do_raw_spin_lock+0x12a/0x2e0 [ 270.348755][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 270.353728][ C0] ? lock_acquire+0x190/0x410 [ 270.358418][ C0] tcp_v6_do_rcv+0x41e/0x12c0 [ 270.363106][ C0] tcp_v6_rcv+0x31f1/0x3500 [ 270.367642][ C0] ? tcp_v6_syn_recv_sock+0x2290/0x2290 [ 270.373194][ C0] ? nf_confirm+0x360/0x4d0 [ 270.377708][ C0] ? mark_held_locks+0xf0/0xf0 [ 270.382674][ C0] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 270.388514][ C0] ip6_input_finish+0x84/0x170 [ 270.393303][ C0] ip6_input+0xe4/0x3f0 [ 270.397470][ C0] ? ip6_input_finish+0x170/0x170 [ 270.402587][ C0] ? __kasan_check_read+0x11/0x20 [ 270.407637][ C0] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 270.413571][ C0] ? lock_downgrade+0x920/0x920 [ 270.418532][ C0] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 270.425070][ C0] ip6_rcv_finish+0x1de/0x2f0 [ 270.429771][ C0] ipv6_rcv+0x10e/0x420 [ 270.434035][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 270.439596][ C0] ? lock_downgrade+0x920/0x920 [ 270.444543][ C0] ? lock_downgrade+0x920/0x920 [ 270.449409][ C0] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 270.455313][ C0] ? trace_hardirqs_off+0x62/0x240 [ 270.460442][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 270.466027][ C0] __netif_receive_skb_one_core+0x113/0x1a0 [ 270.471932][ C0] ? __netif_receive_skb_core+0x3060/0x3060 [ 270.477862][ C0] ? lock_acquire+0x190/0x410 [ 270.482658][ C0] ? process_backlog+0x195/0x750 [ 270.487605][ C0] __netif_receive_skb+0x2c/0x1d0 [ 270.492650][ C0] process_backlog+0x206/0x750 [ 270.497426][ C0] ? lock_acquire+0x190/0x410 [ 270.502119][ C0] ? clockevents_program_event+0x15a/0x370 [ 270.507947][ C0] net_rx_action+0x508/0x10c0 [ 270.512665][ C0] ? napi_complete_done+0x4b0/0x4b0 [ 270.517891][ C0] ? sched_clock+0x2e/0x50 [ 270.522328][ C0] ? kvm_clock_read+0x18/0x30 [ 270.527033][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 270.532428][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 270.538692][ C0] __do_softirq+0x262/0x98c [ 270.543217][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 270.548611][ C0] do_softirq_own_stack+0x2a/0x40 [ 270.554108][ C0] [ 270.557067][ C0] do_softirq.part.0+0x11a/0x170 [ 270.562026][ C0] __local_bh_enable_ip+0x211/0x270 [ 270.567273][ C0] inet_csk_listen_stop+0x1e0/0x850 [ 270.572493][ C0] tcp_close+0xd5b/0x10e0 [ 270.576842][ C0] ? ip_mc_drop_socket+0x211/0x270 [ 270.581992][ C0] ? down_write+0xdf/0x150 [ 270.586444][ C0] inet_release+0xed/0x200 [ 270.590897][ C0] inet6_release+0x53/0x80 [ 270.595329][ C0] __sock_release+0xce/0x280 [ 270.599949][ C0] sock_close+0x1e/0x30 [ 270.604122][ C0] __fput+0x2ff/0x890 [ 270.608124][ C0] ? __sock_release+0x280/0x280 [ 270.612993][ C0] ____fput+0x16/0x20 [ 270.616993][ C0] task_work_run+0x145/0x1c0 [ 270.621615][ C0] exit_to_usermode_loop+0x316/0x380 [ 270.626947][ C0] do_syscall_64+0x65f/0x760 [ 270.631839][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 270.637742][ C0] RIP: 0033:0x406571 [ 270.641645][ 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 [ 270.661255][ C0] RSP: 002b:00007ffe091d2680 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 270.669700][ C0] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000406571 [ 270.677692][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 270.685680][ C0] RBP: 00000000006dcc20 R08: 0000000000000140 R09: 0000000000000140 [ 270.693669][ C0] R10: 00007ffe091d26b0 R11: 0000000000000293 R12: 00007ffe091d26e0 [ 270.701659][ C0] R13: 00000000006dcc2c R14: 000000000000002d R15: 0000000000000008