[api] Guard for large values in AdjustAmountOfExternalAllocatedMemory

Guard for extremely large and small values passed to
Isolate::AdjustAmountOfExternalAllocatedMemory from the embedder.

Bug: chromium:1147372
Change-Id: Ib1470bdf2dd16cbc6e61dd1bca97fa5a66f04c77
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2543925
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#71241}

src/api/api.cc

@@ -8734,6 +8734,14 @@ size_t Isolate::NumberOfPhantomHandleResetsSinceLastCall() {
 
 int64_t Isolate::AdjustAmountOfExternalAllocatedMemory(
     int64_t change_in_bytes) {
+  // Try to check for unreasonably large or small values from the embedder.
+  const int64_t kMaxReasonableBytes = int64_t(1) << 60;
+  const int64_t kMinReasonableBytes = -kMaxReasonableBytes;
+  STATIC_ASSERT(kMaxReasonableBytes >= i::JSArrayBuffer::kMaxByteLength);
+
+  CHECK(kMinReasonableBytes <= change_in_bytes &&
+        change_in_bytes < kMaxReasonableBytes);
+
   i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(this);
   int64_t amount = i_isolate->heap()->update_external_memory(change_in_bytes);