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-rw-r--r--js/src/wasm/WasmJS.cpp18
1 files changed, 16 insertions, 2 deletions
diff --git a/js/src/wasm/WasmJS.cpp b/js/src/wasm/WasmJS.cpp
index 07d6331b8..0b030c844 100644
--- a/js/src/wasm/WasmJS.cpp
+++ b/js/src/wasm/WasmJS.cpp
@@ -1484,6 +1484,20 @@ const JSPropertySpec WasmTableObject::properties[] =
JS_PS_END
};
+static bool
+ToTableIndex(JSContext* cx, HandleValue v, const Table& table, const char* noun, uint32_t* index)
+{
+ if (!ToNonWrappingUint32(cx, v, UINT32_MAX, "Table", noun, index))
+ return false;
+
+ if (*index >= table.length()) {
+ JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_WASM_BAD_UINT32, "Table", noun);
+ return false;
+ }
+
+ return true;
+}
+
/* static */ bool
WasmTableObject::getImpl(JSContext* cx, const CallArgs& args)
{
@@ -1491,7 +1505,7 @@ WasmTableObject::getImpl(JSContext* cx, const CallArgs& args)
const Table& table = tableObj->table();
uint32_t index;
- if (!ToNonWrappingUint32(cx, args.get(0), table.length() - 1, "Table", "get index", &index))
+ if (!ToTableIndex(cx, args.get(0), table, "get index", &index))
return false;
ExternalTableElem& elem = table.externalArray()[index];
@@ -1530,7 +1544,7 @@ WasmTableObject::setImpl(JSContext* cx, const CallArgs& args)
return false;
uint32_t index;
- if (!ToNonWrappingUint32(cx, args.get(0), table.length() - 1, "Table", "set index", &index))
+ if (!ToTableIndex(cx, args.get(0), table, "set index", &index))
return false;
RootedFunction value(cx);