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Fix sign extension of i32 addresses in interpreter memory access #8348

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Fix sign extension of i32 addresses in interpreter memory access #8348

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6 changes: 4 additions & 2 deletions src/wasm-interpreter.h
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Original file line number Diff line number Diff line change
Expand Up @@ -5151,7 +5151,8 @@ class ModuleRunnerBase : public ExpressionRunner<SubType> {
Address
getFinalAddress(LS* curr, Literal ptr, Index bytes, Address memorySize) {
Address memorySizeBytes = memorySize * Memory::kPageSize;
uint64_t addr = ptr.type == Type::i32 ? ptr.geti32() : ptr.geti64();
uint64_t addr = ptr.type == Type::i32 ? (uint64_t)(uint32_t)ptr.geti32()
: (uint64_t)ptr.geti64();
trapIfGt(curr->offset, memorySizeBytes, "offset > memory");
trapIfGt(addr, memorySizeBytes - curr->offset, "final > memory");
addr += curr->offset;
Expand All @@ -5167,7 +5168,8 @@ class ModuleRunnerBase : public ExpressionRunner<SubType> {

Address
getFinalAddressWithoutOffset(Literal ptr, Index bytes, Address memorySize) {
uint64_t addr = ptr.type == Type::i32 ? ptr.geti32() : ptr.geti64();
uint64_t addr = ptr.type == Type::i32 ? (uint64_t)(uint32_t)ptr.geti32()
: (uint64_t)ptr.geti64();
checkLoadAddress(addr, bytes, memorySize);
return addr;
}
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