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eth/protocols/eth: reject message containing duplicated txs and drop peer (#32728)

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Drop peer if sending the same transaction multiple times in a single message.

Fixes https://github.com/ethereum/go-ethereum/issues/32724


---------

Signed-off-by: Csaba Kiraly <csaba.kiraly@gmail.com>
Co-authored-by: Gary Rong <garyrong0905@gmail.com>
Co-authored-by: Csaba Kiraly <csaba.kiraly@gmail.com>
This commit is contained in:
Delweng 2025-10-15 16:24:48 +08:00 committed by GitHub
parent 3cfc33477b
commit 40505a9bc0
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GPG key ID: B5690EEEBB952194
1 changed files with 16 additions and 2 deletions
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18
eth/protocols/eth/handlers.go
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@ -494,12 +494,19 @@ func handleTransactions(backend Backend, msg Decoder, peer *Peer) error {
if err := msg.Decode(&txs); err != nil {
return err
}
// Duplicate transactions are not allowed
seen := make(map[common.Hash]struct{})
for i, tx := range txs {
// Validate and mark the remote transaction
if tx == nil {
return fmt.Errorf("Transactions: transaction %d is nil", i)
}
peer.markTransaction(tx.Hash())
hash := tx.Hash()
if _, exists := seen[hash]; exists {
return fmt.Errorf("Transactions: multiple copies of the same hash %v", hash)
}
seen[hash] = struct{}{}
peer.markTransaction(hash)
}
return backend.Handle(peer, &txs)
}
@ -514,12 +521,19 @@ func handlePooledTransactions(backend Backend, msg Decoder, peer *Peer) error {
if err := msg.Decode(&txs); err != nil {
return err
}
// Duplicate transactions are not allowed
seen := make(map[common.Hash]struct{})
for i, tx := range txs.PooledTransactionsResponse {
// Validate and mark the remote transaction
if tx == nil {
return fmt.Errorf("PooledTransactions: transaction %d is nil", i)
}
peer.markTransaction(tx.Hash())
hash := tx.Hash()
if _, exists := seen[hash]; exists {
return fmt.Errorf("PooledTransactions: multiple copies of the same hash %v", hash)
}
seen[hash] = struct{}{}
peer.markTransaction(hash)
}
requestTracker.Fulfil(peer.id, peer.version, PooledTransactionsMsg, txs.RequestId)