arcvm: Limit fuzzer input size

Limit the arc_property_util_expand_property_contents_fuzzer input size
to avoid timing out on ClusterFuzz.

Bug: 1153405
Change-Id: Id1ea39f7544fc95355fd39b5a291f9538d68a137
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2567817
Auto-Submit: Jesse Schettler <jschettler@chromium.org>
Commit-Queue: Yusuke Sato <yusukes@chromium.org>
Reviewed-by: Yusuke Sato <yusukes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#832492}

components/arc/session/arc_property_util_expand_property_contents_fuzzer.cc

@@ -16,12 +16,20 @@
 #include "components/arc/test/fake_cros_config.h"
 #include "testing/libfuzzer/libfuzzer_exports.h"
 
+namespace {
+constexpr size_t kMaxInputSize = 256 * 1024;
+}
+
 extern "C" int LLVMFuzzerInitialize(int* argc, char*** argv) {
   base::CommandLine::Init(*argc, *argv);
   return 0;
 }
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  // Limit the input size to avoid timing out on ClusterFuzz.
+  if (size > kMaxInputSize)
+    return 0;
+
   FuzzedDataProvider data_provider(data, size);
 
   std::string content = data_provider.ConsumeRandomLengthString(size);