"I have shit taste in everything" - Orikan The Diviner @Steal_your_shit trazyn i need you to datacopy this and frame it in it's own section of your museum

This was the moment I discovered $TLOS and it became a part of @ethereum lore when the geth returndata corruption via datacopy exploit was discovered while fuzz testing the Telos EVM.

El exploit se anunció como "corrupción en RETURNDATA vía datacopy". Esto significa que al ejecutar la misma transacción, dos nodos podían terminar con resultados diferentes permitiendo que alguien enviara dicha transacción para activar el comportamiento y bifurcar la red.

DataLoad, DataLoadN, DataCopy?

EIP-7480: EOF - Data section access instructions remember when i said there was a separation between code and data? sometimes, code needs to read data sections. due to EOF1, old bytecode inspection instructions were deprecated and made invalid. therefore, new ones have to be added: DATALOAD, DATASIZE, DATACOPY, and DATALOADN, following the pattern of other data reading instructions such as returndata and calldata. DATALOAD and DATALOADN load data from data sections into the stack, DATACOPY loads it into memory, and DATASIZE pushes the size of that data section into the stack. 8/14

maybe try dataCopy[rowIndex] ??= {}; which does basically the same

While the current euphoria across #Ethereum is well deserved, let's take a moment and thank @GuidoVranken who discovered the geth RETURNDATA corruption via datacopy exploit in 2021 while fuzz testing the $TLOS #tEVM. It could have been a total disaster. cryptonews.net/news/ethereum…

Šodien datacopy drukāju. Kārtējo reizi nācās aizklapēt iepriekšējā gmail kontu… nemaz nerunājot par neizdzēstajiem novilktajiem failiem. Un miskaste… oj kas tur bija par kaudzi interesantu materiālu. Toties brilles iemanījos aizmirst 🤷🏽‍♀️

@solidity_lang When `datacopy` in Solidity? This could all be a single codecopy.

👉 Code unobservability - no way to do (EXT)CODECOPY, (EXT)CODEHASH, (EXT)CODESIZE. Instead we provide new opcodes to read data section only: DATACOPY, DATALOAD, DATALOADN, DATASIZE.

「ネットワーク "direct-datacopy-～～～ 接続できません」 になってデータの移行できなくて ショップに行って店員もわからなくて お店にある移行の機械使ってできた(無料)

4/ Yul contract consists of a single object with sub-objects. The first code block runs only once during deployment of contract, it is not stored on-chain. To be valid deploy that code block must return the runtime code, that's why we used `datacopy` and `return`.

evidence of the datacopy and stall problem @WorldC3 talks about at #AIFD3 : cs.utexas.edu/~vijay/papers/…

Junto con la profesora @afvasque de @usantamaria analizamos y discutimos evidencias de investigaciones de cada comunidad en base a herramientas como DataCopy, Voyant y otras muchas de libre acceso explora.cl/valparaiso/trabaj… #CulturaCientífica #Valparaíso

15% UK orgs. prefer disk&tape to cloud backups. Our platform offers a module for fast, low-cost, near real-time backup in native format and supports DR in minutes. hubs.la/H0-LgB20 #databackup #cloudbackup #disasterrecovery #databaseadministration #DR #datacopy

2020年11月に発生したGethの異なるバージョン間のチェーン分岐も、dataCopyで、メモリ領域をシャローコピーしていて、範囲外の上書きが発生するってやつだったな。 github.com/ethereum/go-ether…

直接の原因はGethのSTATICCALL opcodeの実装。init codeを実行するとSTATICCALLで、precompile contract(dataCopy)が実行される。このコントラクトはprecompile contractなので実装は各ノードにあり、これ自体は渡された値を返す単純なコントラクト。

1/ Analysis of the #Ethereum code exploitation of CVE-2021–39137 that led to the split. Attack transaction (tx.blocksecteam.com/tx/0x1cb…) This transaction has a STATICCALL with the address 0x4. This is a pre-compiled smart contract dataCopy. #ETH #crypto #blockchain #exploit