core, eth/downloader: make body validation more strict (#26704)

core/block_validator.go

@@ -76,6 +76,9 @@ func (v *BlockValidator) ValidateBody(block *types.Block) error {
 		if hash := types.DeriveSha(block.Withdrawals(), trie.NewStackTrie(nil)); hash != *header.WithdrawalsHash {
 			return fmt.Errorf("withdrawals root hash mismatch (header value %x, calculated %x)", *header.WithdrawalsHash, hash)
 		}
+	} else if block.Withdrawals() != nil {
+		// Withdrawals are not allowed prior to shanghai fork
+		return fmt.Errorf("withdrawals present in block body")
 	}
 
 	if !v.bc.HasBlockAndState(block.ParentHash(), block.NumberU64()-1) {