1 files changed, 6 insertions, 3 deletions
diff --git a/lib/security.c b/lib/security.c
index a268d4a62..4cef8f89f 100644
--- a/lib/security.c
+++ b/lib/security.c
@@ -192,15 +192,18 @@ static CURLcode read_data(struct connectdata *conn,
                           struct krb5buffer *buf)
 {
   int len;
-  void* tmp;
+  void *tmp = NULL;
   CURLcode result;
 
   result = socket_read(fd, &len, sizeof(len));
   if(result)
     return result;
 
-  len = ntohl(len);
-  tmp = realloc(buf->data, len);
+  if(len) {
+    /* only realloc if there was a length */
+    len = ntohl(len);
+    tmp = realloc(buf->data, len);
+  }
   if(tmp == NULL)
     return CURLE_OUT_OF_MEMORY;