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blockchain_db: harden code against invalid input types 

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
No known key found for this signature in database
GPG Key ID: 686F07454D6CEFC3
1 changed files with 2 additions and 9 deletions
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11
src/blockchain_db/blockchain_db.cpp
View File

@ -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");
}
}