From 6258edf23bf6d6e9bbd501a113b95f1e4eb0a4c8 Mon Sep 17 00:00:00 2001
From: caffreyfans <caffreyfans@163.com>
Date: Fri, 17 Dec 2021 16:21:21 +0800
Subject: [PATCH] Fix mDNS memory leak

* Original commit: espressif/esp-idf@119b4a9dd12cf89cc5eaf63f8aa19730607ef30b
---
 components/mdns/mdns.c | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/components/mdns/mdns.c b/components/mdns/mdns.c
index c052a1ae1..0c2b0b6f3 100644
--- a/components/mdns/mdns.c
+++ b/components/mdns/mdns.c
@@ -2315,9 +2315,7 @@ static mdns_service_t * _mdns_create_service(const char * service, const char *
     if (hostname) {
         s->hostname = strndup(hostname, MDNS_NAME_BUF_LEN - 1);
         if (!s->hostname) {
-            free((char *)s->instance);
-            free(s);
-            return NULL;
+            goto fail;
         }
     } else {
         s->hostname = NULL;
@@ -2325,20 +2323,27 @@ static mdns_service_t * _mdns_create_service(const char * service, const char *
 
     s->service = strndup(service, MDNS_NAME_BUF_LEN - 1);
     if (!s->service) {
-        free((char *)s->instance);
-        free(s);
-        return NULL;
+        goto fail;
     }
 
     s->proto = strndup(proto, MDNS_NAME_BUF_LEN - 1);
     if (!s->proto) {
-        free((char *)s->instance);
         free((char *)s->service);
-        free(s);
-        return NULL;
+        goto fail;
     }
 
     return s;
+
+fail:
+    if (s->instance) {
+        free(s->instance);
+    }
+    if (s->hostname) {
+        free(s->hostname);
+    }
+    free(s);
+
+    return NULL;
 }
 
 /**