[serialize] Check offset base is within (possibly end of) object

2019-05-02 15:12:07 -07:00 · 2019-05-02 15:12:07 -07:00 · 91176d5b77
parent 0f1a6ce826
commit 91176d5b77
1 changed files with 1 additions and 0 deletions
--- a/src/hb-serialize.hh
+++ b/src/hb-serialize.hh
@ -295,6 +295,7 @@ struct hb_serialize_context_t
      {
        const object_t::link_t &link = *link_it;
 	const object_t &child = *packed[link.objidx];
+	assert (link.bias <= parent.tail - parent.head);
 	unsigned offset = (child.head - parent.head) - link.bias;

 	if (link.is_wide)