fuzz: Limit script_format to 100kB

Author: MarcoFalke

src/test/fuzz/script_format.cpp

@@ -3,7 +3,9 @@
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <chainparams.h>
+#include <consensus/consensus.h>
 #include <core_io.h>
+#include <policy/policy.h>
 #include <script/script.h>
 #include <test/fuzz/FuzzedDataProvider.h>
 #include <test/fuzz/fuzz.h>
@@ -19,6 +21,9 @@ FUZZ_TARGET_INIT(script_format, initialize_script_format)
 {
     FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
     const CScript script{ConsumeScript(fuzzed_data_provider)};
+    if (script.size() > MAX_STANDARD_TX_WEIGHT / WITNESS_SCALE_FACTOR) {
+        return;
+    }
 
     (void)FormatScript(script);
     (void)ScriptToAsmStr(script, /*fAttemptSighashDecode=*/fuzzed_data_provider.ConsumeBool());