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string.c: add missing size_t cast

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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
This commit is contained in:
rhe 2016-12-20 06:53:45 +00:00
parent b5da45d6d7
commit 44ba4fd362
1 changed files with 1 additions and 1 deletions
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2
string.c
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@ -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;\