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core/txpool/blobpool: limit reorder buffer size for DoS protection

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Signed-off-by: Csaba Kiraly <csaba.kiraly@gmail.com>
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Csaba Kiraly 2025-09-23 21:01:25 +02:00
parent cb59ff5cf8
commit 81a116801d
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1 changed files with 7 additions and 1 deletions
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8
core/txpool/blobpool/blobpool.go
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@ -101,6 +101,10 @@ const (
// the pool will still accept and convert legacy blob transactions. After this
// window, all legacy blob transactions will be rejected.
conversionTimeWindow = time.Hour * 2
// maxGappedTxs is the maximum number of gapped transactions kept overall.
// This is a safety limit to avoid DoS vectors.
maxGapped = 128
)
// blobTxMeta is the minimal subset of types.BlobTx necessary to validate and
@ -1739,7 +1743,9 @@ func (p *BlobPool) add(tx *types.Transaction) (err error) {
// Store the tx in memory, and revalidate later
from, _ := types.Sender(p.signer, tx)
allowance := p.gappedAllowance(from)
if allowance >= 1 {
if allowance >= 1 && len(p.gapped) < maxGapped {
// if maxGapped is reached, it is better to give time to gapped
// transactions by keeping the old and dropping this one
p.gapped[from] = append(p.gapped[from], tx)
log.Trace("blobpool:add added to Gapped blob queue", "allowance", allowance, "hash", tx.Hash(), "from", from, "nonce", tx.Nonce(), "qlen", len(p.gapped[from]))
return nil