v8/test/mjsunit/regress/wasm/regress-940296.js
Andreas Haas e162eb4443 [wasm] Fix insufficient bounds check in WebAssembly.get
According to the wasm js-spec, the table index can be uint32. The
implementation in our implementation expected an int though. We did not
check for the int overflow.

I replaced the throwing of the exception in WasmTableObject::Get to use
the ErrorThrower instead of throwing the exception with Isolate::Throw
directly. The reason is that I see with other CL's that I have to throw
several errors, and I don't want to introduce a new message and
MessageId for every error. Moreover, the ErrorThrower is a standard way
in wasm to throw errors. It feels right to throw the error the same way
here.

R=mstarzinger@chromium.org

Bug: chromium:940296
Change-Id: Idb77c813506fe66a3192b66fe0e8e807b80580ab
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1514496
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#60181}
2019-03-12 11:29:02 +00:00

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292 B
JavaScript

// Copyright 2019 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
let table = new WebAssembly.Table({element: "anyfunc", initial: 1});
assertThrows(() => table.get(3612882876), RangeError);