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attempt to subtract with overflow #384

@taeasy

Description

@taeasy

Describe the bug

attempt to subtract with overflow.

Details of your setup

VpnCloud version:
v2.3.0
Description of your VPN setup

  • 3 nodes
  • one NAT node
  • tap mode

Config file contents
normally in /etc/vpncloud/MYNET.net

listen: 3210
crypto:
password: "***"
device:
name: "vpncloud"
type: "tap"
fix-rp-filter: true
mode: "switch"
switch-timeout: 300
keepalive: 300

Log entries
normally in /var/log/vpncloud.MYNET.log

Thu Nov 27 23:34:47 2025 daemon.info vpncloud[5367]: INFO - Added peer [::::d58f:fd29:960:cf3a]:3210
Thu Nov 27 23:34:47 2025 daemon.info vpncloud[5367]: INFO - Added peer [::::92be:b4f8:5d0c:7245]:3210
Thu Nov 27 23:34:49 2025 daemon.info vpncloud[5367]: ERROR - Invalid crypto state: Crypto core not ready yet
Thu Nov 27 23:34:59 2025 daemon.info vpncloud[5367]: ERROR - Invalid crypto state: Crypto core not ready yet
Thu Nov 27 23:35:09 2025 daemon.info vpncloud[5367]: ERROR - Invalid crypto state: Crypto core not ready yet
Thu Nov 27 23:35:19 2025 daemon.info vpncloud[5367]: ERROR - Invalid crypto state: Crypto core not ready yet
Thu Nov 27 23:35:23 2025 daemon.info vpncloud[5367]: ERROR - Invalid crypto state: No message in buffer
Thu Nov 27 23:35:23 2025 daemon.info vpncloud[5367]: ERROR - Invalid crypto state: No message in buffer
Thu Nov 27 23:35:23 2025 daemon.info vpncloud[5367]: ERROR - Invalid crypto state: No message in buffer
Thu Nov 27 23:35:23 2025 daemon.info vpncloud[5367]: ERROR - Invalid crypto state: No message in buffer
Thu Nov 27 23:35:23 2025 daemon.info vpncloud[5367]: ERROR - Invalid crypto state: No message in buffer
Thu Nov 27 23:35:23 2025 daemon.info vpncloud[5367]: ERROR - Invalid crypto state: No message in buffer
Thu Nov 27 23:35:23 2025 daemon.info vpncloud[5367]: ERROR - Invalid crypto state: No message in buffer
Thu Nov 27 23:35:23 2025 daemon.info vpncloud[5367]: INFO - Added peer ...:23648
Thu Nov 27 23:35:23 2025 daemon.info vpncloud[5367]: INFO - Closing pending connection to ...:23648 due to error in crypto init
Thu Nov 27 23:35:28 2025 daemon.err vpncloud[5367]:
Thu Nov 27 23:35:28 2025 daemon.err vpncloud[5367]: thread 'main' panicked at src/cloud.rs:453:54:
Thu Nov 27 23:35:28 2025 daemon.err vpncloud[5367]: attempt to subtract with overflow
Thu Nov 27 23:35:28 2025 daemon.err vpncloud[5367]: note: run with RUST_BACKTRACE=1 environment variable to display a backtrace

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