diff --git a/testing/multi_sanitizer_fuzz_target.cc b/testing/multi_sanitizer_fuzz_target.cc
index 10b40b2..4838e32 100644
--- a/testing/multi_sanitizer_fuzz_target.cc
+++ b/testing/multi_sanitizer_fuzz_target.cc
@@ -20,6 +20,7 @@
 #include <thread>  // NOLINT
 
 [[maybe_unused]] static volatile void *sink;
+[[maybe_unused]] static volatile int int_sink;
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
   if (size != 3) return 0;  // Make bugs easy to discover.
@@ -45,5 +46,9 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
     ++racy_var;
     t.join();
   }
+  // mcm => buffer overflow inside memcmp
+  if (data[0] == 'm' && data[1] == 'c' && data[2] == 'm') {
+    int_sink = memcmp(data, "mcm123", 6);
+  }
   return 0;
 }