From 055abe2fd3962ea0474ec552ff092e8aa050f3d4 Mon Sep 17 00:00:00 2001
From: div72 <noreply@div72.xyz>
Date: Fri, 5 Apr 2024 00:08:34 +0300
Subject: [PATCH] rpc: check for return of LookupHost

Not checking can cause a segfault if LookupHost fails.
---
 src/rpc/net.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/rpc/net.cpp b/src/rpc/net.cpp
index 65180d6139..13127761d3 100644
--- a/src/rpc/net.cpp
+++ b/src/rpc/net.cpp
@@ -241,8 +241,9 @@ UniValue setban(const UniValue& params, bool fHelp)
 
     if (!isSubnet) {
         std::vector<CNetAddr> resolved;
-        LookupHost(params[0].get_str().c_str(), resolved, 1, false);
-        netAddr = resolved[0];
+        if (LookupHost(params[0].get_str().c_str(), resolved, 1, false)) {
+            netAddr = resolved[0];
+        }
     }
     else
         LookupSubNet(params[0].get_str().c_str(), subNet);