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compile.c: check size

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* compile.c (compile_data_alloc): check allocation size and
  integer overflow.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46960 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2014-07-26 10:06:49 +00:00
parent 39fd13bc5c
commit 61fd977798
1 changed files with 4 additions and 4 deletions
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8
compile.c
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@ -595,13 +595,13 @@ compile_data_alloc(rb_iseq_t *iseq, size_t size)
struct iseq_compile_data_storage *storage =
iseq->compile_data->storage_current;
if (size >= INT_MAX) rb_memerror();
if (storage->pos + size > storage->size) {
unsigned long alloc_size = storage->size * 2;
unsigned int alloc_size = storage->size;
retry:
if (alloc_size < size) {
while (alloc_size < size) {
if (alloc_size >= INT_MAX / 2) rb_memerror();
alloc_size *= 2;
goto retry;
}
storage->next = (void *)ALLOC_N(char, alloc_size +
SIZEOF_ISEQ_COMPILE_DATA_STORAGE);