ldap: fix to not leak `attribute` on OOM (WinLDAP)

Reported-by: Andrew Nesbitt
Closes #21576

diff --git a/lib/ldap.c b/lib/ldap.c
index f476da4ea00d8f7ad441bfcb2046c008f5705613..0f9e7821719bd36ceb27f87d560abfa4e2ed5080 100644 (file)
--- a/lib/ldap.c
+++ b/lib/ldap.c
@@ -474,6 +474,7 @@ static CURLcode ldap_do(struct Curl_easy *data, bool *done)
 #ifdef USE_WIN32_LDAP
       char *attr = curlx_convert_tchar_to_UTF8(attribute);
       if(!attr) {
+        ldap_memfree(attribute);
         result = CURLE_OUT_OF_MEMORY;
         goto quit;
       }