Pavel Orehov reported memory problems with the multi interface in bug report

#1098843. In short, a shared DNS cache was setup for a multi handle and when
the shared cache was deleted before the individual easy handles, the latter
cleanups caused read/writes to already freed memory.

1 files changed, 10 insertions, 0 deletions

diff --git a/lib/easy.c b/lib/easy.c
index 0b3774823..9310b843a 100644
--- a/lib/easy.c
+++ b/lib/easy.c
@@ -82,6 +82,7 @@
 #include "share.h"
 #include "memory.h"
 #include "progress.h"
+#include "easy.h"
 
 #define _MPRINTF_REPLACE /* use our functions only */
 #include <curl/mprintf.h>
@@ -404,6 +405,15 @@ void curl_easy_cleanup(CURL *curl)
 }
 
 /*
+ * Store a pointed to the multi handle within the easy handle's data struct.
+ */
+void Curl_easy_addmulti(struct SessionHandle *data,
+                        void *multi)
+{
+  data->multi = multi;
+}
+
+/*
  * curl_easy_getinfo() is an external interface that allows an app to retrieve
  * information from a performed transfer and similar.
  */