Created
June 27, 2018 03:43
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Bitcoin ABC Large Block ZeroDay Vulnerability - 01
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| static bool ConnectBlock(const Config &config, const CBlock &block, | |
| CValidationState &state, CBlockIndex *pindex, | |
| CCoinsViewCache &view, bool fJustCheck = false) { | |
| ==> AssertLockHeld(cs_main); | |
| // ... | |
| ==> if (!control.Wait()) { | |
| return state.DoS(100, false, REJECT_INVALID, "blk-bad-inputs", false, | |
| "parallel script check failed"); | |
| } | |
| bool SendMessages(const Config &config, CNode *pto, CConnman &connman, | |
| const std::atomic<bool> &interruptMsgProc) { | |
| // .... | |
| ==> TRY_LOCK(cs_main, lockMain); | |
| if (!lockMain) { | |
| return true; | |
| } |
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Multi threading 101: get & hold lock, do stuff, release lock. Seems that's not how Bcash understood this.