Warning: Permanently added '10.128.15.201' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 248.642745][ T9608] Set syz2 is full, maxelem 65536 reached [ 353.659511][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 353.666572][ C0] rcu: 0-...!: (10501 ticks this GP) idle=b2e/1/0x4000000000000002 softirq=16984/16984 fqs=0 [ 353.676977][ C0] (t=10502 jiffies g=9153 q=15) [ 353.681897][ C0] rcu: rcu_preempt kthread starved for 10503 jiffies! g9153 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 [ 353.693152][ C0] rcu: RCU grace-period kthread stack dump: [ 353.699033][ C0] rcu_preempt I28776 10 2 0x80004000 [ 353.705342][ C0] Call Trace: [ 353.708712][ C0] __schedule+0x934/0x1f90 [ 353.713119][ C0] ? __sched_text_start+0x8/0x8 [ 353.717976][ C0] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 353.723773][ C0] ? schedule_timeout+0x47c/0xc50 [ 353.728825][ C0] ? lockdep_hardirqs_on+0x421/0x5e0 [ 353.737133][ C0] schedule+0xdc/0x2b0 [ 353.741188][ C0] schedule_timeout+0x486/0xc50 [ 353.746034][ C0] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 353.751825][ C0] ? usleep_range+0x170/0x170 [ 353.756511][ C0] ? trace_hardirqs_on+0x67/0x240 [ 353.761568][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 353.767113][ C0] ? swake_up_one+0x60/0x60 [ 353.772184][ C0] rcu_gp_kthread+0xa10/0x1940 [ 353.776965][ C0] ? rcu_note_context_switch+0x1980/0x1980 [ 353.782775][ C0] ? trace_hardirqs_on+0x67/0x240 [ 353.787925][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 353.794205][ C0] ? __kthread_parkme+0x108/0x1c0 [ 353.803444][ C0] ? __kasan_check_read+0x11/0x20 [ 353.808470][ C0] kthread+0x361/0x430 [ 353.812614][ C0] ? rcu_note_context_switch+0x1980/0x1980 [ 353.818414][ C0] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 353.824281][ C0] ret_from_fork+0x24/0x30 [ 353.828723][ C0] NMI backtrace for cpu 0 [ 353.833130][ C0] CPU: 0 PID: 9609 Comm: syz-executor153 Not tainted 5.5.0-next-20200210-syzkaller #0 [ 353.842792][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 353.852962][ C0] Call Trace: [ 353.856228][ C0] [ 353.859120][ C0] dump_stack+0x197/0x210 [ 353.863465][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 353.868710][ C0] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 353.874332][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 353.880301][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 353.886179][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 353.891298][ C0] rcu_sched_clock_irq.cold+0x51a/0xc3d [ 353.896871][ C0] ? raise_softirq+0x138/0x340 [ 353.901623][ C0] update_process_times+0x2d/0x70 [ 353.906666][ C0] tick_sched_handle+0xa2/0x190 [ 353.911528][ C0] tick_sched_timer+0x53/0x140 [ 353.916301][ C0] __hrtimer_run_queues+0x364/0xe40 [ 353.921485][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 353.926750][ C0] ? hrtimer_init+0x330/0x330 [ 353.931412][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 353.937124][ C0] ? ktime_get_update_offsets_now+0x2ce/0x430 [ 353.943176][ C0] hrtimer_interrupt+0x314/0x770 [ 353.948122][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 353.953651][ C0] apic_timer_interrupt+0xf/0x20 [ 353.958563][ C0] [ 353.961540][ C0] RIP: 0010:hash_ip4_expire.isra.0+0x28b/0x8d0 [ 353.967957][ C0] Code: fa 48 8b 75 c8 48 85 f6 0f 88 a0 00 00 00 e8 8c cb e5 fa 48 8b 4d b0 44 8d 43 01 48 89 c8 83 e1 07 48 c1 e8 03 42 0f b6 04 38 <38> c8 7f 08 84 c0 0f 85 ea 04 00 00 48 8b 45 c0 44 89 c7 48 83 c3 [ 353.987539][ C0] RSP: 0018:ffffc90005a66e28 EFLAGS: 00000a06 ORIG_RAX: ffffffffffffff13 [ 353.995942][ C0] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000001 [ 354.003975][ C0] RDX: 0000000000000000 RSI: ffffffff868fd824 RDI: 0000000000000007 [ 354.011937][ C0] RBP: ffffc90005a66ed8 R08: 0000000000000002 R09: ffffed1014eef0c3 [ 354.020069][ C0] R10: ffffed1014eef0c2 R11: ffff8880a7778617 R12: ffff8880a7778630 [ 354.028039][ C0] R13: ffff8880a3e5ce00 R14: ffff8880a7778610 R15: dffffc0000000000 [ 354.036025][ C0] ? hash_ip4_expire.isra.0+0x274/0x8d0 [ 354.041571][ C0] ? hash_ip4_expire.isra.0+0x274/0x8d0 [ 354.047132][ C0] hash_ip4_add+0x178/0x1b6c [ 354.051729][ C0] hash_ip4_uadt+0x546/0x7a0 [ 354.056374][ C0] ? hash_ip6_add+0x1d70/0x1d70 [ 354.061227][ C0] ? hash_ip6_uadt+0x670/0x670 [ 354.066005][ C0] ? __kasan_check_write+0x14/0x20 [ 354.071202][ C0] call_ad+0x1a0/0x5a0 [ 354.075315][ C0] ? start_msg+0x220/0x220 [ 354.079863][ C0] ? nla_memcpy+0xb0/0xb0 [ 354.084203][ C0] ? __nla_parse+0x43/0x60 [ 354.088610][ C0] ip_set_ad.isra.0+0x572/0xb20 [ 354.093453][ C0] ? ip_set_dump_start+0x6f0/0x6f0 [ 354.098754][ C0] ? nla_memcpy+0xb0/0xb0 [ 354.103125][ C0] ? lock_downgrade+0x920/0x920 [ 354.108007][ C0] ip_set_uadd+0x37/0x50 [ 354.112242][ C0] ? ip_set_udel+0x50/0x50 [ 354.116705][ C0] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 354.121666][ C0] ? nfnetlink_bind+0x2c0/0x2c0 [ 354.126753][ C0] ? __kasan_check_read+0x11/0x20 [ 354.131833][ C0] ? __lock_acquire+0x8a0/0x4a00 [ 354.136769][ C0] ? save_stack+0x5c/0x90 [ 354.141169][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 354.147428][ C0] ? apparmor_capable+0x4df/0x910 [ 354.152451][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 354.158703][ C0] ? __kasan_check_read+0x11/0x20 [ 354.163769][ C0] ? apparmor_cred_prepare+0x7b0/0x7b0 [ 354.169275][ C0] netlink_rcv_skb+0x177/0x450 [ 354.174040][ C0] ? nfnetlink_bind+0x2c0/0x2c0 [ 354.178882][ C0] ? netlink_ack+0xb50/0xb50 [ 354.183464][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 354.189705][ C0] ? ns_capable_common+0x93/0x100 [ 354.194743][ C0] ? ns_capable+0x20/0x30 [ 354.199067][ C0] ? __netlink_ns_capable+0x104/0x140 [ 354.204441][ C0] nfnetlink_rcv+0x1ba/0x460 [ 354.209017][ C0] ? nfnetlink_rcv_batch+0x1790/0x1790 [ 354.214464][ C0] ? netlink_deliver_tap+0x248/0xbf0 [ 354.219752][ C0] ? __kasan_check_write+0x14/0x20 [ 354.224880][ C0] netlink_unicast+0x59e/0x7e0 [ 354.229746][ C0] ? netlink_attachskb+0x870/0x870 [ 354.234848][ C0] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 354.240608][ C0] ? __check_object_size+0x3d/0x437 [ 354.245806][ C0] netlink_sendmsg+0x91c/0xea0 [ 354.250579][ C0] ? netlink_unicast+0x7e0/0x7e0 [ 354.255537][ C0] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 354.261075][ C0] ? apparmor_socket_sendmsg+0x2a/0x30 [ 354.266534][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 354.272857][ C0] ? security_socket_sendmsg+0x8d/0xc0 [ 354.278309][ C0] ? netlink_unicast+0x7e0/0x7e0 [ 354.283435][ C0] sock_sendmsg+0xd7/0x130 [ 354.287896][ C0] ____sys_sendmsg+0x753/0x880 [ 354.292706][ C0] ? kernel_sendmsg+0x50/0x50 [ 354.297379][ C0] ? lockdep_init_map+0x1be/0x6d0 [ 354.302408][ C0] ___sys_sendmsg+0x100/0x170 [ 354.307217][ C0] ? sendmsg_copy_msghdr+0x70/0x70 [ 354.312323][ C0] ? __kasan_check_read+0x11/0x20 [ 354.318401][ C0] ? __lock_acquire+0x8a0/0x4a00 [ 354.323332][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 354.329637][ C0] ? __this_cpu_preempt_check+0x35/0x190 [ 354.335272][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 354.341509][ C0] ? percpu_counter_add_batch+0x13c/0x190 [ 354.347316][ C0] ? __fd_install+0x1bc/0x640 [ 354.351987][ C0] ? find_held_lock+0x35/0x130 [ 354.356748][ C0] ? __fd_install+0x1bc/0x640 [ 354.361436][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 354.367690][ C0] ? __fget_light+0x1ad/0x270 [ 354.372363][ C0] ? __fdget+0x1b/0x20 [ 354.376428][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 354.382768][ C0] __sys_sendmsg+0x105/0x1d0 [ 354.387406][ C0] ? __sys_sendmsg_sock+0xc0/0xc0 [ 354.392487][ C0] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 354.397957][ C0] ? do_syscall_64+0x26/0x790 [ 354.402637][ C0] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 354.408697][ C0] ? do_syscall_64+0x26/0x790 [ 354.413397][ C0] __x64_sys_sendmsg+0x78/0xb0 [ 354.418156][ C0] do_syscall_64+0xfa/0x790 [ 354.422660][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 354.428782][ C0] RIP: 0033:0x441579 [ 354.432728][ C0] Code: e8 fc ab 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 9b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 354.452488][ C0] RSP: 002b:00007ffcd9b20d88 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 354.460907][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441579 [ 354.468885][ C0] RDX: 0000000000000000 RSI: 0000000020000d00 RDI: 0000000000000004 [ 354.476848][ C0] RBP: 000000000003c802 R08: 00000000004002c8 R09: 00000000004002c8 [ 354.484811][ C0] R10: 00000000004002c8 R11: 0000000000000246 R12: 00000000004023a0 [ 354.492777][ C0] R13: 0000000000402430 R14: 0000000000000000 R15: 0000000000000000