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node.c: check size

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* node.c (rb_alloc_tmp_buffer): round up the size and check the
  range.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51499 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2015-08-06 01:50:00 +00:00
parent ec10c033a7
commit 8b6a0f7325
2 changed files with 16 additions and 5 deletions
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16
node.c
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@ -1079,10 +1079,18 @@ rb_gc_mark_node(NODE *obj)
void *
rb_alloc_tmp_buffer(volatile VALUE *store, long len)
{
NODE *s = rb_node_newnode(NODE_ALLOCA, 0, 0, 0);
void *ptr = xmalloc(len);
s->u1.node = ptr;
s->u3.cnt = len / sizeof(VALUE);
NODE *s;
long cnt;
void *ptr;
if (len < 0 || (cnt = (long)roomof(len, sizeof(VALUE))) < 0) {
rb_raise(rb_eArgError, "negative buffer size (or size too big)");
}
s = rb_node_newnode(NODE_ALLOCA, 0, 0, 0);
ptr = xmalloc(cnt * sizeof(VALUE));
s->u1.value = (VALUE)ptr;
s->u3.cnt = cnt;
*store = (VALUE)s;
return ptr;
}