Check stack limit in FunctionPrototype::method_apply()

We could just crash there, assuming unlimited memory, but as this
particular place seems to be a very attractive target for various
mischief, let's just plug it.

Change-Id: I3b0369ceb34dafd12ce8dc1f189fc5f9ee82c169
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

1 files changed, 13 insertions, 0 deletions

diff --git a/tests/auto/qml/qjsengine/tst_qjsengine.cpp b/tests/auto/qml/qjsengine/tst_qjsengine.cpp
index df428d5929..e379cb1f11 100644
--- a/tests/auto/qml/qjsengine/tst_qjsengine.cpp
+++ b/tests/auto/qml/qjsengine/tst_qjsengine.cpp
@@ -257,6 +257,7 @@ private slots:
     void compileBrokenRegexp();
     void sortNonStringArray();
     void iterateInvalidProxy();
+    void applyOnHugeArray();
 
     void tostringRecursionCheck();
     void arrayIncludesWithLargeArray();
@@ -5094,6 +5095,18 @@ void tst_QJSEngine::iterateInvalidProxy()
     QCOMPARE(value.toString(), "TypeError: Type error");
 }
 
+void tst_QJSEngine::applyOnHugeArray()
+{
+    QJSEngine engine;
+    const auto value = engine.evaluate(
+        "var a = new Array(10);"
+        "a[536870912] = Function;"
+        "Function.apply('aaaaaaaa', a);"
+    );
+    QVERIFY(value.isError());
+    QCOMPARE(value.toString(), "RangeError: Array too large for apply().");
+}
+
 QTEST_MAIN(tst_QJSEngine)
 
 #include "tst_qjsengine.moc"