From b3dfe28be4924b912b29479c39d9a19160ff659d Mon Sep 17 00:00:00 2001
From: jwang <joshua.wang@getcruise.com>
Date: Mon, 27 Aug 2018 13:28:11 -0700
Subject: [PATCH] adding int overflow checks to vrefbuffer

---
 src/vrefbuffer.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/vrefbuffer.c b/src/vrefbuffer.c
index 4734b0ff..46bb00fd 100644
--- a/src/vrefbuffer.c
+++ b/src/vrefbuffer.c
@@ -171,12 +171,13 @@ int msgpack_vrefbuffer_append_copy(msgpack_vrefbuffer* vbuf,
 int msgpack_vrefbuffer_migrate(msgpack_vrefbuffer* vbuf, msgpack_vrefbuffer* to)
 {
     size_t sz = vbuf->chunk_size;
+    msgpack_vrefbuffer_chunk* empty = NULL;
 
     if((sizeof(msgpack_vrefbuffer_chunk) + sz) < sz){
         return -1;
     }
 
-    msgpack_vrefbuffer_chunk* empty = (msgpack_vrefbuffer_chunk*)malloc(
+    empty = (msgpack_vrefbuffer_chunk*)malloc(
             sizeof(msgpack_vrefbuffer_chunk) + sz);
     if(empty == NULL) {
         return -1;