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Avoid returning a BIP9Stats object with uninitialized values

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Uninitialized data potentially used in `rpc/blockchain.cpp`:

```
static UniValue BIP9SoftForkDesc(const Consensus::Params& consensusParams, Consensus::DeploymentPos id)
{
    ...
    const ThresholdState thresholdState = VersionBitsTipState(consensusParams, id);
    ...
    if (THRESHOLD_STARTED == thresholdState)
    {
        UniValue statsUV(UniValue::VOBJ);
        BIP9Stats statsStruct = VersionBitsTipStatistics(consensusParams, id);
        statsUV.push_back(Pair("period", statsStruct.period));
        statsUV.push_back(Pair("threshold", statsStruct.threshold));
        statsUV.push_back(Pair("elapsed", statsStruct.elapsed));
        statsUV.push_back(Pair("count", statsStruct.count));
        statsUV.push_back(Pair("possible", statsStruct.possible));
        rv.push_back(Pair("statistics", statsUV));
    }
    ...
    return rv;
}
```
This commit is contained in:
practicalswift 2017-07-30 23:36:33 +02:00
parent 70888a39c4
commit 3eb53b8671
1 changed files with 1 additions and 1 deletions
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2
src/versionbits.cpp
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@ -107,7 +107,7 @@ ThresholdState AbstractThresholdConditionChecker::GetStateFor(const CBlockIndex*
// return the numerical statistics of blocks signalling the specified BIP9 condition in this current period // return the numerical statistics of blocks signalling the specified BIP9 condition in this current period
BIP9Stats AbstractThresholdConditionChecker::GetStateStatisticsFor(const CBlockIndex* pindex, const Consensus::Params& params) const BIP9Stats AbstractThresholdConditionChecker::GetStateStatisticsFor(const CBlockIndex* pindex, const Consensus::Params& params) const
{ {
BIP9Stats stats; BIP9Stats stats = {};
stats.period = Period(params); stats.period = Period(params);
stats.threshold = Threshold(params); stats.threshold = Threshold(params);