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Merge #20375: fuzz: Improve coverage for CPartialMerkleTree fuzzing harness

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3c77b8009de9457c356c0bf4362d11bb99a17bb7 fuzz: Improve coverage for CPartialMerkleTree fuzzing harness (practicalswift)

Pull request description:

  Improve coverage for `CPartialMerkleTree` fuzzing harness.

  See [`doc/fuzzing.md`](https://github.com/bitcoin/bitcoin/blob/master/doc/fuzzing.md) for information on how to fuzz Bitcoin Core. Don't forget to contribute any coverage increasing inputs you find to the [Bitcoin Core fuzzing corpus repo](https://github.com/bitcoin-core/qa-assets).

  Happy fuzzing :)

ACKs for top commit:
  MarcoFalke:
    ACK 3c77b8009de9457c356c0bf4362d11bb99a17bb7

Tree-SHA512: a1fa0f7650a5ee5ff83f35e41b9faf6c34671fc304b9af00e5b83073f21d50bcbe91c2428fa64d05dc42a7c521bfd24031e307c7f4abf9ded469d69a55c5d64a
This commit is contained in:
MarcoFalke 2020-11-12 09:57:26 +01:00 committed by PastaPastaPasta
parent 25ae9444cd
commit c545e11426
1 changed files with 29 additions and 5 deletions
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34
src/test/fuzz/merkleblock.cpp
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@ -16,12 +16,36 @@
FUZZ_TARGET(merkleblock)
{
FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
std::optional<CPartialMerkleTree> partial_merkle_tree = ConsumeDeserializable<CPartialMerkleTree>(fuzzed_data_provider);
if (!partial_merkle_tree) {
return;
CPartialMerkleTree partial_merkle_tree;
switch (fuzzed_data_provider.ConsumeIntegralInRange<int>(0, 1)) {
case 0: {
const std::optional<CPartialMerkleTree> opt_partial_merkle_tree = ConsumeDeserializable<CPartialMerkleTree>(fuzzed_data_provider);
if (opt_partial_merkle_tree) {
partial_merkle_tree = *opt_partial_merkle_tree;
}
break;
}
(void)partial_merkle_tree->GetNumTransactions();
case 1: {
CMerkleBlock merkle_block;
const std::optional<CBlock> opt_block = ConsumeDeserializable<CBlock>(fuzzed_data_provider);
CBloomFilter bloom_filter;
std::set<uint256> txids;
if (opt_block && !opt_block->vtx.empty()) {
if (fuzzed_data_provider.ConsumeBool()) {
merkle_block = CMerkleBlock{*opt_block, bloom_filter};
} else if (fuzzed_data_provider.ConsumeBool()) {
while (fuzzed_data_provider.ConsumeBool()) {
txids.insert(ConsumeUInt256(fuzzed_data_provider));
}
merkle_block = CMerkleBlock{*opt_block, txids};
}
}
partial_merkle_tree = merkle_block.txn;
break;
}
}
(void)partial_merkle_tree.GetNumTransactions();
std::vector<uint256> matches;
std::vector<unsigned int> indices;
(void)partial_merkle_tree->ExtractMatches(matches, indices);
(void)partial_merkle_tree.ExtractMatches(matches, indices);
}