Warning: Permanently added '10.128.10.55' (ECDSA) to the list of known hosts. syzkaller login: [ 193.571109][T10159] IPVS: ftp: loaded support on port[0] = 21 [ 193.619576][T10159] chnl_net:caif_netlink_parms(): no params data found [ 193.639785][T10159] bridge0: port 1(bridge_slave_0) entered blocking state [ 193.646917][T10159] bridge0: port 1(bridge_slave_0) entered disabled state [ 193.654658][T10159] device bridge_slave_0 entered promiscuous mode [ 193.662007][T10159] bridge0: port 2(bridge_slave_1) entered blocking state [ 193.669205][T10159] bridge0: port 2(bridge_slave_1) entered disabled state [ 193.676718][T10159] device bridge_slave_1 entered promiscuous mode [ 193.690740][T10159] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 193.701151][T10159] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 193.718078][T10159] team0: Port device team_slave_0 added [ 193.724568][T10159] team0: Port device team_slave_1 added [ 193.806793][T10159] device hsr_slave_0 entered promiscuous mode [ 193.855436][T10159] device hsr_slave_1 entered promiscuous mode [ 193.910424][T10159] bridge0: port 2(bridge_slave_1) entered blocking state [ 193.917514][T10159] bridge0: port 2(bridge_slave_1) entered forwarding state [ 193.924875][T10159] bridge0: port 1(bridge_slave_0) entered blocking state [ 193.931972][T10159] bridge0: port 1(bridge_slave_0) entered forwarding state [ 193.958595][T10159] 8021q: adding VLAN 0 to HW filter on device bond0 [ 193.969435][ T3487] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 193.988195][ T3487] bridge0: port 1(bridge_slave_0) entered disabled state [ 193.995763][ T3487] bridge0: port 2(bridge_slave_1) entered disabled state [ 194.003335][ T3487] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 194.013624][T10159] 8021q: adding VLAN 0 to HW filter on device team0 [ 194.023057][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 194.031654][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 194.038752][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 194.055813][ T3487] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 194.064122][ T3487] bridge0: port 2(bridge_slave_1) entered blocking state [ 194.071212][ T3487] bridge0: port 2(bridge_slave_1) entered forwarding state [ 194.079422][ T3487] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 194.087798][ T3487] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 194.097737][ T3487] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 194.105926][ T3487] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready executing program [ 194.117293][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 194.127170][T10159] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 194.142356][T10159] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 194.171861][ C1] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 299.325155][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 299.331815][ C0] rcu: 0-...!: (10499 ticks this GP) idle=8e6/1/0x4000000000000002 softirq=9673/9673 fqs=2 [ 299.341946][ C0] (t=10501 jiffies g=10445 q=9) [ 299.346876][ C0] rcu: rcu_preempt kthread starved for 10498 jiffies! g10445 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 299.358131][ C0] rcu: RCU grace-period kthread stack dump: [ 299.364003][ C0] rcu_preempt R running task 29528 10 2 0x80004000 [ 299.371896][ C0] Call Trace: [ 299.375188][ C0] __schedule+0x755/0x15b0 [ 299.379606][ C0] ? __sched_text_start+0x8/0x8 [ 299.384464][ C0] schedule+0xa8/0x270 [ 299.388528][ C0] schedule_timeout+0x486/0xc50 [ 299.393370][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 299.398299][ C0] ? usleep_range+0x170/0x170 [ 299.402968][ C0] ? trace_hardirqs_on+0x67/0x240 [ 299.407980][ C0] ? __kasan_check_read+0x11/0x20 [ 299.413003][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 299.418543][ C0] ? swake_up_one+0x60/0x60 [ 299.423045][ C0] rcu_gp_kthread+0x9b2/0x18c0 [ 299.427802][ C0] ? rcu_barrier+0x310/0x310 [ 299.432470][ C0] ? trace_hardirqs_on+0x67/0x240 [ 299.437481][ C0] ? __kasan_check_read+0x11/0x20 [ 299.442507][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 299.448760][ C0] ? __kthread_parkme+0x108/0x1c0 [ 299.453788][ C0] ? __kasan_check_read+0x11/0x20 [ 299.458809][ C0] kthread+0x361/0x430 [ 299.462871][ C0] ? rcu_barrier+0x310/0x310 [ 299.467451][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 299.473683][ C0] ret_from_fork+0x24/0x30 [ 299.478095][ C0] NMI backtrace for cpu 0 [ 299.482414][ C0] CPU: 0 PID: 10159 Comm: syz-executor165 Not tainted 5.3.0-rc2-next-20190801 #57 [ 299.491596][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 299.501636][ C0] Call Trace: [ 299.504910][ C0] [ 299.507760][ C0] dump_stack+0x172/0x1f0 [ 299.512083][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 299.517273][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 299.523515][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 299.529140][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 299.535117][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 299.540999][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 299.546107][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 299.551645][ C0] ? raise_softirq+0x138/0x340 [ 299.556403][ C0] update_process_times+0x32/0x80 [ 299.561419][ C0] tick_sched_handle+0xa2/0x190 [ 299.566262][ C0] tick_sched_timer+0x53/0x140 [ 299.571018][ C0] __hrtimer_run_queues+0x364/0xe40 [ 299.576209][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 299.581494][ C0] ? hrtimer_sleeper_start_expires+0x90/0x90 [ 299.587465][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 299.593176][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 299.599244][ C0] hrtimer_interrupt+0x314/0x770 [ 299.604182][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 299.609732][ C0] apic_timer_interrupt+0xf/0x20 [ 299.614663][ C0] RIP: 0010:check_memory_region+0x30/0x1a0 [ 299.620463][ C0] Code: 01 00 00 48 b8 ff ff ff ff ff 7f ff ff 55 0f b6 d2 48 39 c7 48 89 e5 41 55 41 54 53 0f 86 07 01 00 00 4c 8d 5c 37 ff 49 89 f8 <48> b8 00 00 00 00 00 fc ff df 4d 89 da 49 c1 e8 03 4d 8d 24 00 49 [ 299.640060][ C0] RSP: 0018:ffff8880ae8091d8 EFLAGS: 00000216 ORIG_RAX: ffffffffffffff13 [ 299.648465][ C0] RAX: ffff7fffffffffff RBX: ffff88808e43ed08 RCX: ffffffff8158f467 [ 299.656432][ C0] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88808e43ed08 [ 299.664400][ C0] RBP: ffff8880ae8091f0 R08: ffff88808e43ed08 R09: ffffed1011c87da2 [ 299.672365][ C0] R10: ffffed1011c87da1 R11: ffff88808e43ed0b R12: 0000000000000001 [ 299.680327][ C0] R13: 0000000000000003 R14: ffffed1011c87da1 R15: 0000000000000001 [ 299.688300][ C0] ? apic_timer_interrupt+0xa/0x20 [ 299.693408][ C0] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 299.699754][ C0] __kasan_check_read+0x11/0x20 [ 299.704596][ C0] native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 299.710741][ C0] ? __pv_queued_spin_lock_slowpath+0xd10/0xd10 [ 299.716976][ C0] ? mark_held_locks+0xf0/0xf0 [ 299.721731][ C0] do_raw_spin_lock+0x20e/0x2e0 [ 299.726586][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 299.731512][ C0] ? lock_acquire+0x190/0x410 [ 299.736177][ C0] ? release_sock+0x20/0x1c0 [ 299.740755][ C0] ? __kasan_check_read+0x11/0x20 [ 299.745781][ C0] _raw_spin_lock_bh+0x3b/0x50 [ 299.750541][ C0] ? release_sock+0x20/0x1c0 [ 299.755141][ C0] release_sock+0x20/0x1c0 [ 299.759552][ C0] wait_on_pending_writer+0x20f/0x420 [ 299.764918][ C0] ? ip6_rcv_finish+0x1de/0x2f0 [ 299.769758][ C0] ? tls_init+0x560/0x560 [ 299.774083][ C0] ? process_backlog+0x206/0x750 [ 299.779094][ C0] ? net_rx_action+0x508/0x10c0 [ 299.783935][ C0] ? __do_softirq+0x262/0x98c [ 299.788606][ C0] ? prepare_to_wait_exclusive+0x320/0x320 [ 299.794405][ C0] ? inet_release+0xed/0x200 [ 299.798987][ C0] ? inet6_release+0x53/0x80 [ 299.803567][ C0] ? __sock_release+0xce/0x280 [ 299.808323][ C0] ? sock_close+0x1e/0x30 [ 299.812640][ C0] ? __fput+0x2ff/0x890 [ 299.816782][ C0] ? ____fput+0x16/0x20 [ 299.820925][ C0] ? task_work_run+0x145/0x1c0 [ 299.825680][ C0] ? exit_to_usermode_loop+0x316/0x380 [ 299.831149][ C0] tls_sk_proto_cleanup+0x2c5/0x3e0 [ 299.836340][ C0] ? wait_on_pending_writer+0x420/0x420 [ 299.841883][ C0] tls_sk_proto_unhash+0x90/0x3f0 [ 299.846926][ C0] tcp_set_state+0x5b9/0x7d0 [ 299.851509][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 299.857741][ C0] ? __sk_mem_reduce_allocated+0x1b0/0x560 [ 299.863542][ C0] ? tcp_alloc_md5sig_pool+0x4a0/0x4a0 [ 299.868993][ C0] ? __sk_mem_reclaim+0x55/0x70 [ 299.873841][ C0] ? tcp_write_queue_purge+0x5d8/0x1310 [ 299.879390][ C0] ? inet6_sk_rx_dst_set+0x244/0x6f0 [ 299.884666][ C0] tcp_done+0xe2/0x320 [ 299.888727][ C0] tcp_reset+0x132/0x500 [ 299.892962][ C0] tcp_validate_incoming+0xa2d/0x1660 [ 299.898337][ C0] tcp_rcv_established+0x6b5/0x1e70 [ 299.903538][ C0] ? mark_held_locks+0xf0/0xf0 [ 299.908303][ C0] ? sk_filter_trim_cap+0x45f/0xb30 [ 299.913495][ C0] ? tcp_data_queue+0x4860/0x4860 [ 299.918993][ C0] ? do_raw_spin_lock+0x12a/0x2e0 [ 299.924010][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 299.928936][ C0] ? lock_acquire+0x190/0x410 [ 299.933615][ C0] tcp_v6_do_rcv+0x41e/0x12c0 [ 299.938315][ C0] tcp_v6_rcv+0x31f1/0x3500 [ 299.943026][ C0] ? tcp_v6_syn_recv_sock+0x2290/0x2290 [ 299.948572][ C0] ? nf_confirm+0x360/0x4d0 [ 299.953068][ C0] ? mark_held_locks+0xf0/0xf0 [ 299.957823][ C0] ip6_protocol_deliver_rcu+0x2fe/0x1660 [ 299.963455][ C0] ip6_input_finish+0x84/0x170 [ 299.968211][ C0] ip6_input+0xe4/0x3f0 [ 299.972361][ C0] ? ip6_input_finish+0x170/0x170 [ 299.977376][ C0] ? __kasan_check_read+0x11/0x20 [ 299.982477][ C0] ? ip6_protocol_deliver_rcu+0x1660/0x1660 [ 299.988365][ C0] ? lock_downgrade+0x920/0x920 [ 299.993207][ C0] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 299.999440][ C0] ip6_rcv_finish+0x1de/0x2f0 [ 300.004105][ C0] ipv6_rcv+0x10e/0x420 [ 300.008252][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 300.013704][ C0] ? lock_downgrade+0x920/0x920 [ 300.018543][ C0] ? lock_downgrade+0x920/0x920 [ 300.023389][ C0] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 300.029274][ C0] ? trace_hardirqs_off+0x62/0x240 [ 300.034380][ C0] ? ip6_rcv_core.isra.0+0x1bb0/0x1bb0 [ 300.039918][ C0] __netif_receive_skb_one_core+0x113/0x1a0 [ 300.045804][ C0] ? __netif_receive_skb_core+0x3060/0x3060 [ 300.051687][ C0] ? lock_acquire+0x190/0x410 [ 300.056352][ C0] ? process_backlog+0x195/0x750 [ 300.061294][ C0] __netif_receive_skb+0x2c/0x1d0 [ 300.066315][ C0] process_backlog+0x206/0x750 [ 300.071164][ C0] ? lock_acquire+0x190/0x410 [ 300.075835][ C0] ? clockevents_program_event+0x15a/0x370 [ 300.081647][ C0] net_rx_action+0x508/0x10c0 [ 300.086318][ C0] ? napi_complete_done+0x4b0/0x4b0 [ 300.091506][ C0] ? sched_clock+0x2e/0x50 [ 300.095912][ C0] ? kvm_clock_read+0x18/0x30 [ 300.100590][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 300.105953][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 300.112187][ C0] __do_softirq+0x262/0x98c [ 300.116703][ C0] ? inet_csk_listen_stop+0x1bc/0x850 [ 300.122063][ C0] do_softirq_own_stack+0x2a/0x40 [ 300.127087][ C0] [ 300.130027][ C0] do_softirq.part.0+0x11a/0x170 [ 300.134964][ C0] __local_bh_enable_ip+0x211/0x270 [ 300.140186][ C0] inet_csk_listen_stop+0x1e0/0x850 [ 300.145403][ C0] tcp_close+0xd5b/0x10e0 [ 300.149726][ C0] ? ip_mc_drop_socket+0x211/0x270 [ 300.154825][ C0] ? down_write+0xdf/0x150 [ 300.159240][ C0] inet_release+0xed/0x200 [ 300.163649][ C0] inet6_release+0x53/0x80 [ 300.168060][ C0] __sock_release+0xce/0x280 [ 300.172646][ C0] sock_close+0x1e/0x30 [ 300.176790][ C0] __fput+0x2ff/0x890 [ 300.180763][ C0] ? __sock_release+0x280/0x280 [ 300.185605][ C0] ____fput+0x16/0x20 [ 300.189584][ C0] task_work_run+0x145/0x1c0 [ 300.194182][ C0] exit_to_usermode_loop+0x316/0x380 [ 300.199465][ C0] do_syscall_64+0x65f/0x760 [ 300.204048][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 300.210198][ C0] RIP: 0033:0x406581 [ 300.214092][ 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 [ 300.233685][ C0] RSP: 002b:00007fff17dbbba0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 300.242086][ C0] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000406581 [ 300.250059][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 300.258032][ C0] RBP: 00000000006dcc20 R08: 0000000000000140 R09: 0000000000000140 [ 300.266012][ C0] R10: 00007fff17dbbbd0 R11: 0000000000000293 R12: 00007fff17dbbc00 [ 300.273988][ C0] R13: 00000000006dcc2c R14: 000000000000002d R15: 0000000000000007