Warning: Permanently added '10.128.10.21' (ECDSA) to the list of known hosts. syzkaller login: [ 177.779914][ T9774] IPVS: ftp: loaded support on port[0] = 21 [ 177.819801][ T9774] chnl_net:caif_netlink_parms(): no params data found [ 177.842972][ T9774] bridge0: port 1(bridge_slave_0) entered blocking state [ 177.850473][ T9774] bridge0: port 1(bridge_slave_0) entered disabled state [ 177.858154][ T9774] device bridge_slave_0 entered promiscuous mode [ 177.865403][ T9774] bridge0: port 2(bridge_slave_1) entered blocking state [ 177.872607][ T9774] bridge0: port 2(bridge_slave_1) entered disabled state [ 177.881177][ T9774] device bridge_slave_1 entered promiscuous mode [ 177.895275][ T9774] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 177.905362][ T9774] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 177.920837][ T9774] team0: Port device team_slave_0 added [ 177.927423][ T9774] team0: Port device team_slave_1 added [ 177.984566][ T9774] device hsr_slave_0 entered promiscuous mode [ 178.023028][ T9774] device hsr_slave_1 entered promiscuous mode [ 178.078046][ T9774] bridge0: port 2(bridge_slave_1) entered blocking state [ 178.085338][ T9774] bridge0: port 2(bridge_slave_1) entered forwarding state [ 178.092637][ T9774] bridge0: port 1(bridge_slave_0) entered blocking state [ 178.099752][ T9774] bridge0: port 1(bridge_slave_0) entered forwarding state [ 178.124877][ T9774] 8021q: adding VLAN 0 to HW filter on device bond0 [ 178.135550][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 178.144859][ T3014] bridge0: port 1(bridge_slave_0) entered disabled state [ 178.152611][ T3014] bridge0: port 2(bridge_slave_1) entered disabled state [ 178.160847][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 178.171009][ T9774] 8021q: adding VLAN 0 to HW filter on device team0 [ 178.180114][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 178.188501][ T5] bridge0: port 1(bridge_slave_0) entered blocking state [ 178.195574][ T5] bridge0: port 1(bridge_slave_0) entered forwarding state [ 178.205513][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 178.214259][ T3014] bridge0: port 2(bridge_slave_1) entered blocking state [ 178.221410][ T3014] bridge0: port 2(bridge_slave_1) entered forwarding state [ 178.234682][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 178.244019][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 178.253684][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 178.265968][ T9774] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network executing program [ 178.277497][ T9774] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 178.289235][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 178.297647][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 178.305995][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 178.320890][ T9774] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 178.350392][ C1] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 283.512837][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 283.519493][ C1] rcu: 1-...!: (10500 ticks this GP) idle=a76/1/0x4000000000000002 softirq=8584/8584 fqs=0 [ 283.529616][ C1] (t=10500 jiffies g=9013 q=6) [ 283.534445][ C1] rcu: rcu_preempt kthread starved for 10500 jiffies! g9013 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 283.545687][ C1] rcu: RCU grace-period kthread stack dump: [ 283.551550][ C1] rcu_preempt I29528 10 2 0x80004000 [ 283.557860][ C1] Call Trace: [ 283.561224][ C1] __schedule+0x755/0x15b0 [ 283.565624][ C1] ? __sched_text_start+0x8/0x8 [ 283.570456][ C1] schedule+0xa8/0x270 [ 283.574530][ C1] schedule_timeout+0x486/0xc50 [ 283.579618][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 283.584536][ C1] ? usleep_range+0x170/0x170 [ 283.589215][ C1] ? trace_hardirqs_on+0x67/0x240 [ 283.594251][ C1] ? __kasan_check_read+0x11/0x20 [ 283.599275][ C1] ? __next_timer_interrupt+0x1a0/0x1a0 [ 283.604818][ C1] ? swake_up_one+0x60/0x60 [ 283.609299][ C1] ? trace_hardirqs_on+0x67/0x240 [ 283.614326][ C1] rcu_gp_kthread+0x9b2/0x18c0 [ 283.619071][ C1] ? rcu_barrier+0x310/0x310 [ 283.623634][ C1] ? trace_hardirqs_on+0x67/0x240 [ 283.628632][ C1] ? __kasan_check_read+0x11/0x20 [ 283.633662][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 283.639906][ C1] ? __kthread_parkme+0x108/0x1c0 [ 283.644993][ C1] ? __kasan_check_read+0x11/0x20 [ 283.650014][ C1] kthread+0x361/0x430 [ 283.654061][ C1] ? rcu_barrier+0x310/0x310 [ 283.658629][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 283.664845][ C1] ret_from_fork+0x24/0x30 [ 283.669288][ C1] NMI backtrace for cpu 1 [ 283.673642][ C1] CPU: 1 PID: 9774 Comm: syz-executor160 Not tainted 5.3.0-rc1-next-20190726 #53 [ 283.682720][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 283.692750][ C1] Call Trace: [ 283.696010][ C1] [ 283.698892][ C1] dump_stack+0x172/0x1f0 [ 283.703209][ C1] nmi_cpu_backtrace.cold+0x70/0xb2 [ 283.708398][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 283.714692][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 283.720322][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 283.726283][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 283.732155][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 283.737245][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 283.742801][ C1] ? raise_softirq+0x138/0x340 [ 283.747550][ C1] update_process_times+0x32/0x80 [ 283.752592][ C1] tick_sched_handle+0xa2/0x190 [ 283.757427][ C1] tick_sched_timer+0x53/0x140 [ 283.762176][ C1] __hrtimer_run_queues+0x364/0xe40 [ 283.767359][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 283.772649][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 283.778175][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 283.783875][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 283.789920][ C1] hrtimer_interrupt+0x314/0x770 [ 283.794845][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 283.800373][ C1] apic_timer_interrupt+0xf/0x20 [ 283.805390][ C1] RIP: 0010:native_queued_spin_lock_slowpath+0x132/0x9f0 [ 283.812400][ 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 [ 283.832002][ C1] RSP: 0018:ffff8880ae909210 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 [ 283.840401][ C1] RAX: 0000000000000000 RBX: ffff8880936ac108 RCX: ffffffff8159a3d7 [ 283.848379][ C1] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880936ac108 [ 283.856330][ C1] RBP: ffff8880ae9092d0 R08: 1ffff110126d5821 R09: ffffed10126d5822 [ 283.864283][ C1] R10: ffffed10126d5821 R11: ffff8880936ac10b R12: 0000000000000001 [ 283.872246][ C1] R13: 0000000000000003 R14: ffffed10126d5821 R15: 0000000000000001 [ 283.880207][ C1] ? apic_timer_interrupt+0xa/0x20 [ 283.885319][ C1] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 283.891649][ C1] ? __pv_queued_spin_lock_slowpath+0xd10/0xd10 [ 283.897884][ C1] ? mark_held_locks+0xf0/0xf0 [ 283.902627][ C1] do_raw_spin_lock+0x20e/0x2e0 [ 283.907456][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 283.912458][ C1] ? lock_acquire+0x190/0x410 [ 283.917187][ C1] ? release_sock+0x20/0x1c0 [ 283.921778][ C1] ? __kasan_check_read+0x11/0x20 [ 283.926785][ C1] _raw_spin_lock_bh+0x3b/0x50 [ 283.931535][ C1] ? release_sock+0x20/0x1c0 [ 283.936109][ C1] release_sock+0x20/0x1c0 [ 283.940557][ C1] wait_on_pending_writer+0x20f/0x420 [ 283.945929][ C1] ? ip6_rcv_finish+0x1de/0x2f0 [ 283.950846][ C1] ? tls_init+0x560/0x560 [ 283.955197][ C1] ? process_backlog+0x206/0x750 [ 283.960126][ C1] ? net_rx_action+0x508/0x10c0 [ 283.964965][ C1] ? __do_softirq+0x262/0x98c [ 283.969624][ C1] ? prepare_to_wait_exclusive+0x320/0x320 [ 283.975490][ C1] ? inet_release+0xed/0x200 [ 283.980131][ C1] ? inet6_release+0x53/0x80 [ 283.984758][ C1] ? __sock_release+0xce/0x280 [ 283.989587][ C1] ? sock_close+0x1e/0x30 [ 283.993937][ C1] ? __fput+0x2ff/0x890 [ 283.998068][ C1] ? ____fput+0x16/0x20 [ 284.002200][ C1] ? task_work_run+0x145/0x1c0 [ 284.006975][ C1] ? exit_to_usermode_loop+0x316/0x380 [ 284.012419][ C1] tls_sk_proto_cleanup+0x2c5/0x3e0 [ 284.017596][ C1] ? wait_on_pending_writer+0x420/0x420 [ 284.023124][ C1] tls_sk_proto_unhash+0x90/0x3f0 [ 284.028168][ C1] tcp_set_state+0x5b9/0x7d0 [ 284.032739][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 284.038957][ C1] ? __sk_mem_reduce_allocated+0x1b0/0x560 [ 284.044759][ C1] ? tcp_alloc_md5sig_pool+0x4a0/0x4a0 [ 284.050198][ C1] ? __sk_mem_reclaim+0x55/0x70 [ 284.055030][ C1] ? tcp_write_queue_purge+0x5d8/0x1310 [ 284.060611][ C1] ? inet6_sk_rx_dst_set+0x244/0x6f0 [ 284.065876][ C1] tcp_done+0xe2/0x320 [ 284.069931][ C1] tcp_reset+0x132/0x500 [ 284.074151][ C1] tcp_validate_incoming+0xa2d/0x1660 [ 284.079677][ C1] tcp_rcv_established+0x6b5/0x1e70 [ 284.084860][ C1] ? mark_held_locks+0xf0/0xf0 [ 284.089653][ C1] ? sk_filter_trim_cap+0x45f/0xb30 [ 284.094840][ C1] ? tcp_data_queue+0x4860/0x4860 [ 284.099952][ C1] ? do_raw_spin_lock+0x12a/0x2e0 [ 284.104955][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 284.110043][ C1] ? lock_acquire+0x190/0x410 [ 284.114699][ C1] tcp_v6_do_rcv+0x41e/0x12c0 [ 284.119444][ C1] tcp_v6_rcv+0x31f1/0x3500 [ 284.123945][ C1] ? tcp_v6_syn_recv_sock+0x2290/0x2290 [ 284.129522][ C1] ? nf_confirm+0x360/0x4d0 [ 284.134003][ C1] ? mark_held_locks+0xf0/0xf0 [ 284.138743][ C1] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 284.144373][ C1] ip6_input_finish+0x84/0x170 [ 284.149115][ C1] ip6_input+0xe4/0x3f0 [ 284.153246][ C1] ? ip6_input_finish+0x170/0x170 [ 284.158246][ C1] ? __kasan_check_read+0x11/0x20 [ 284.163248][ C1] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 284.169133][ C1] ? lock_downgrade+0x920/0x920 [ 284.173962][ C1] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 284.180181][ C1] ip6_rcv_finish+0x1de/0x2f0 [ 284.184841][ C1] ipv6_rcv+0x10e/0x420 [ 284.189254][ C1] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 284.194693][ C1] ? lock_downgrade+0x920/0x920 [ 284.199530][ C1] ? lock_downgrade+0x920/0x920 [ 284.204362][ C1] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 284.210237][ C1] ? trace_hardirqs_off+0x62/0x240 [ 284.215334][ C1] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 284.220772][ C1] __netif_receive_skb_one_core+0x113/0x1a0 [ 284.226643][ C1] ? __netif_receive_skb_core+0x3060/0x3060 [ 284.232520][ C1] ? lock_acquire+0x190/0x410 [ 284.237262][ C1] ? process_backlog+0x195/0x750 [ 284.242183][ C1] __netif_receive_skb+0x2c/0x1d0 [ 284.247391][ C1] process_backlog+0x206/0x750 [ 284.252145][ C1] ? lock_acquire+0x190/0x410 [ 284.256806][ C1] ? clockevents_program_event+0x15a/0x370 [ 284.262592][ C1] net_rx_action+0x508/0x10c0 [ 284.267250][ C1] ? napi_complete_done+0x4b0/0x4b0 [ 284.272498][ C1] ? sched_clock+0x2e/0x50 [ 284.276914][ C1] ? kvm_clock_read+0x18/0x30 [ 284.281573][ C1] ? inet_csk_listen_stop+0x1bc/0x850 [ 284.286944][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 284.293164][ C1] __do_softirq+0x262/0x98c [ 284.297647][ C1] ? inet_csk_listen_stop+0x1bc/0x850 [ 284.303012][ C1] do_softirq_own_stack+0x2a/0x40 [ 284.308010][ C1] [ 284.310932][ C1] do_softirq.part.0+0x11a/0x170 [ 284.315848][ C1] __local_bh_enable_ip+0x211/0x270 [ 284.321022][ C1] inet_csk_listen_stop+0x1e0/0x850 [ 284.326200][ C1] tcp_close+0xd5b/0x10e0 [ 284.330766][ C1] ? ip_mc_drop_socket+0x211/0x270 [ 284.335854][ C1] ? down_write+0xdf/0x150 [ 284.340249][ C1] inet_release+0xed/0x200 [ 284.344646][ C1] inet6_release+0x53/0x80 [ 284.349044][ C1] __sock_release+0xce/0x280 [ 284.353636][ C1] sock_close+0x1e/0x30 [ 284.357775][ C1] __fput+0x2ff/0x890 [ 284.361749][ C1] ? __sock_release+0x280/0x280 [ 284.366583][ C1] ____fput+0x16/0x20 [ 284.370542][ C1] task_work_run+0x145/0x1c0 [ 284.375292][ C1] exit_to_usermode_loop+0x316/0x380 [ 284.380579][ C1] do_syscall_64+0x65f/0x760 [ 284.385158][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 284.391041][ C1] RIP: 0033:0x406571 [ 284.394923][ 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 [ 284.414516][ C1] RSP: 002b:00007fff983778f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 284.422908][ C1] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000406571 [ 284.430868][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 284.438817][ C1] RBP: 00000000006dcc20 R08: 0000000000000140 R09: 0000000000000140 [ 284.446768][ C1] R10: 00007fff98377920 R11: 0000000000000293 R12: 00007fff98377950 [ 284.454718][ C1] R13: 00000000006dcc2c R14: 000000000000002d R15: 0000000000000007