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blockchain_db: harden code against invalid input types

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If an invalid input type were to get to this, the code could
remove key images that might be present already in the chain,
which could allow a double spend, even if this is impossible
with the current code.

Reported by KeyboardWarrior.
This commit is contained in:
moneromooo-monero 2021-03-24 21:42:09 +00:00
parent dcba757dd2
commit f6e2636493
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GPG key ID: 686F07454D6CEFC3
1 changed files with 2 additions and 9 deletions
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11
src/blockchain_db/blockchain_db.cpp
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@ -216,15 +216,8 @@ void BlockchainDB::add_transaction(const crypto::hash& blk_hash, const std::pair
}
else
{
LOG_PRINT_L1("Unsupported input type, removing key images and aborting transaction addition");
for (const txin_v& tx_input : tx.vin)
{
if (tx_input.type() == typeid(txin_to_key))
{
remove_spent_key(boost::get<txin_to_key>(tx_input).k_image);
}
}
return;
LOG_PRINT_L1("Unsupported input type, aborting transaction addition");
throw std::runtime_error("Unexpected input type, aborting");
}
}