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[ox/nodebuffer] Fix bounds checking in Ptr generation

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This commit is contained in:
Gary Talent
2019-06-25 08:19:59 -05:00
parent 3adf0df9c7
commit 0c7f8c8b5e
1 changed files with 3 additions and 2 deletions
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5
deps/ox/src/ox/ptrarith/nodebuffer.hpp vendored
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@@ -219,8 +219,9 @@ typename NodeBuffer<size_t, Item>::ItemPtr NodeBuffer<size_t, Item>::ptr(size_t
std::size_t itemSpace = m_header.size - itemOffset;
auto item = reinterpret_cast<Item*>(reinterpret_cast<uint8_t*>(this) + itemOffset);
if (itemOffset >= sizeof(Header) &&
itemSpace >= sizeof(Item) &&
itemSpace >= item->fullSize()) {
itemOffset + itemSpace <= size() &&
itemSpace >= sizeof(Item) &&
itemSpace >= item->fullSize()) {
return ItemPtr(this, m_header.size, itemOffset, item->fullSize());
} else {
//oxTrace("ox::ptrarith::NodeBuffer::ptr::null") << "itemOffset:" << itemOffset;