socks_sspi: use the correct free function

When freeing buffers allocated by SSPI, use its own function, not free().

Reported-by: Joshua Rogers
Closes #19046

diff --git a/lib/socks_sspi.c b/lib/socks_sspi.c
index 54049e8c99284a37971193132a62cea63124e0b9..1077019b11c5ea63e86004b125e162e516ecf77c 100644 (file)
--- a/lib/socks_sspi.c
+++ b/lib/socks_sspi.c
@@ -590,9 +590,12 @@ error:
     Curl_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
   if(names.sUserName)
     Curl_pSecFn->FreeContextBuffer(names.sUserName);
-  free(sspi_w_token[0].pvBuffer);
-  free(sspi_w_token[1].pvBuffer);
-  free(sspi_w_token[2].pvBuffer);
+  if(sspi_w_token[0].pvBuffer)
+    Curl_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
+  if(sspi_w_token[1].pvBuffer)
+    Curl_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer);
+  if(sspi_w_token[2].pvBuffer)
+    Curl_pSecFn->FreeContextBuffer(sspi_w_token[2].pvBuffer);
   free(etbuf);
   return result;
 }