From 83ee977746528be13144c4d6e8c091104416d0b0 Mon Sep 17 00:00:00 2001
From: Nicola Murino <nicola.murino@gmail.com>
Date: Thu, 23 Jan 2025 08:07:33 +0100
Subject: [PATCH] ip lists: check the list size before parsing the IP

Signed-off-by: Nicola Murino <nicola.murino@gmail.com>
---
 internal/dataprovider/iplist.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/internal/dataprovider/iplist.go b/internal/dataprovider/iplist.go
index f24da8e6..bc3b5b99 100644
--- a/internal/dataprovider/iplist.go
+++ b/internal/dataprovider/iplist.go
@@ -418,6 +418,10 @@ func (l *IPList) IsListed(ip, protocol string) (bool, int, error) {
 		l.mu.RLock()
 		defer l.mu.RUnlock()
 
+		if l.Ranges.Len() == 0 {
+			return false, 0, nil
+		}
+
 		parsedIP := net.ParseIP(ip)
 		if parsedIP == nil {
 			return false, 0, fmt.Errorf("invalid IP %s", ip)