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v8: make sure we're operating in a wasm32 memory space. #307

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Merged
merged 2 commits into from
Aug 5, 2022
Merged

v8: make sure we're operating in a wasm32 memory space. #307

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v8: make sure we're operating in a wasm32 memory space.
PiotrSikora Aug 4, 2022
b51df85
Merge branch 'master' into sec-005
PiotrSikora Aug 5, 2022
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16 changes: 16 additions & 0 deletions src/v8/v8.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -469,6 +469,10 @@ uint64_t V8::getMemorySize() { return memory_->data_size(); }

std::optional<std::string_view> V8::getMemory(uint64_t pointer, uint64_t size) {
assert(memory_ != nullptr);
// Make sure we're operating in a wasm32 memory space.
if (pointer > UINT32_MAX || size > UINT32_MAX || pointer + size > UINT32_MAX) {
return std::nullopt;
}
if (pointer + size > memory_->data_size()) {
return std::nullopt;
}
Expand All @@ -477,6 +481,10 @@ std::optional<std::string_view> V8::getMemory(uint64_t pointer, uint64_t size) {

bool V8::setMemory(uint64_t pointer, uint64_t size, const void *data) {
assert(memory_ != nullptr);
// Make sure we're operating in a wasm32 memory space.
if (pointer > UINT32_MAX || size > UINT32_MAX || pointer + size > UINT32_MAX) {
return false;
}
if (pointer + size > memory_->data_size()) {
return false;
}
Expand All @@ -486,6 +494,10 @@ bool V8::setMemory(uint64_t pointer, uint64_t size, const void *data) {

bool V8::getWord(uint64_t pointer, Word *word) {
constexpr auto size = sizeof(uint32_t);
// Make sure we're operating in a wasm32 memory space.
if (pointer > UINT32_MAX || pointer + size > UINT32_MAX) {
return false;
}
if (pointer + size > memory_->data_size()) {
return false;
}
Expand All @@ -497,6 +509,10 @@ bool V8::getWord(uint64_t pointer, Word *word) {

bool V8::setWord(uint64_t pointer, Word word) {
constexpr auto size = sizeof(uint32_t);
// Make sure we're operating in a wasm32 memory space.
if (pointer > UINT32_MAX || pointer + size > UINT32_MAX) {
return false;
}
if (pointer + size > memory_->data_size()) {
return false;
}
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