Merge bitcoin/bitcoin#24441: fuzz: Limit script_format to 100kB

bbbbeaf9c87030eb6b033b6a22002ca8d6635d51 fuzz: Limit script_format to 100kB (MarcoFalke)

Pull request description:

  The target is still one of the slowest ones, but doesn't seem incredibly important. Especially for sizes larger than the standard tx size.

  Fix that by limiting the script size.

ACKs for top commit:
  fanquake:
    ACK bbbbeaf9c87030eb6b033b6a22002ca8d6635d51

Tree-SHA512: b6cf7248753909ef2f21d8824f187e7c05732dd3b99619c0067f862f3c2b0f9a87779d4ddbbd3a7a4bae5c794280e2f0a223bf835d6bc6ccaba01817d69479a2

1 files changed, 5 insertions, 0 deletions

diff --git a/src/test/fuzz/script_format.cpp b/src/test/fuzz/script_format.cpp
index 2fa893f812..241bdfe666 100644
--- a/src/test/fuzz/script_format.cpp
+++ b/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());