diff --git a/scripts/buildvm_extraip.sh b/scripts/buildvm_extraip.sh
index be9807a..09d8de3 100644
--- a/scripts/buildvm_extraip.sh
+++ b/scripts/buildvm_extraip.sh
@@ -105,6 +105,10 @@ if ! command -v ping > /dev/null 2>&1; then
 fi
 interface=$(lshw -C network | awk '/logical name:/{print $3}' | head -1)
 user_main_ip_range=$(grep -A 1 "iface ${interface}" /etc/network/interfaces | grep "address" | awk '{print $2}')
+if [ -z "$user_main_ip_range" ]; then
+  echo "宿主机可用IP区间查询失败"
+  exit 1
+fi
 # 宿主机IP
 user_main_ip=$(echo "$user_main_ip_range" | cut -d'/' -f1)
 user_ip_range=$(echo "$user_main_ip_range" | cut -d'/' -f2)