From 1bddfe02d5b3d728a01a85ee588696310876f0d9 Mon Sep 17 00:00:00 2001
From: x2018 <xkernel.wang@foxmail.com>
Date: Sun, 9 Nov 2025 00:37:16 +0800
Subject: [PATCH] asyn-thrdd: release rrname if ares_init_options fails

Closes #19410
---
 lib/asyn-thrdd.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/asyn-thrdd.c b/lib/asyn-thrdd.c
index b25745ee1b..2ee4629890 100644
--- a/lib/asyn-thrdd.c
+++ b/lib/asyn-thrdd.c
@@ -376,14 +376,17 @@ static CURLcode async_rr_start(struct Curl_easy *data, int port)
   status = ares_init_options(&thrdd->rr.channel, NULL, 0);
   if(status != ARES_SUCCESS) {
     thrdd->rr.channel = NULL;
+    free(rrname);
     return CURLE_FAILED_INIT;
   }
 #ifdef CURLDEBUG
   if(getenv("CURL_DNS_SERVER")) {
     const char *servers = getenv("CURL_DNS_SERVER");
     status = ares_set_servers_ports_csv(thrdd->rr.channel, servers);
-    if(status)
+    if(status) {
+      free(rrname);
       return CURLE_FAILED_INIT;
+    }
   }
 #endif