--- libcurl-7.32.0-orig/lib/multi.c	2013-08-09 17:41:42.000000000 -0400
+++ libcurl-7.32.0/lib/multi.c	2013-09-30 14:29:37.078921341 -0400
@@ -512,6 +512,9 @@
   if(!GOOD_EASY_HANDLE(curl_handle))
     return CURLM_BAD_EASY_HANDLE;
 
+  if(easy->multi != multi)
+    return CURLM_BAD_EASY_HANDLE;
+
   if(easy) {
     bool premature = (easy->mstate < CURLM_STATE_COMPLETED) ? TRUE : FALSE;
     bool easy_owns_conn = (easy->easy_conn &&