diff --git a/src/core/fuzz-execute-serialize.c b/src/core/fuzz-execute-serialize.c
index 862b525974..6069efd519 100644
--- a/src/core/fuzz-execute-serialize.c
+++ b/src/core/fuzz-execute-serialize.c
@@ -75,6 +75,9 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
         _cleanup_fclose_ FILE *f = NULL;
         _cleanup_fdset_free_ FDSet *fdset = NULL;
 
+        if (outside_size_range(size, 0, 128 * 1024))
+                return 0;
+
         fuzz_setup_logging();
 
         assert_se(fdset = fdset_new());