From 44ba4fd36248d8d496cb31cf2f33a0ad0c19b5a2 Mon Sep 17 00:00:00 2001
From: rhe <rhe@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Tue, 20 Dec 2016 06:53:45 +0000
Subject: string.c: add missing size_t cast

Add size_t cast to avoid signed integer overflow. r56157 ("string.c:
avoid signed integer overflow", 2016-09-13) missed this. Suppresses
UBSan.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57122 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 string.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'string.c')

diff --git a/string.c b/string.c
index 04737f0713..f9a93fd9c7 100644
--- a/string.c
+++ b/string.c
@@ -130,7 +130,7 @@ VALUE rb_cSymbol;
 #define RESIZE_CAPA_TERM(str,capacity,termlen) do {\
     if (STR_EMBED_P(str)) {\
 	if (!STR_EMBEDDABLE_P(capacity, termlen)) {\
-	    char *const tmp = ALLOC_N(char, (capacity)+termlen);\
+	    char *const tmp = ALLOC_N(char, (size_t)(capacity) + (termlen));\
 	    const long tlen = RSTRING_LEN(str);\
 	    memcpy(tmp, RSTRING_PTR(str), tlen);\
 	    RSTRING(str)->as.heap.ptr = tmp;\
-- 
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