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[0.18 backport] Fix HasValidFee potential overflow #864

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merged 1 commit into from
Apr 16, 2020
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[0.18 backport] Fix HasValidFee potential overflow #864

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5 changes: 4 additions & 1 deletion src/confidential_validation.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -33,9 +33,12 @@ bool HasValidFee(const CTransaction& tx) {
if (fee == 0 || !MoneyRange(fee))
return false;
totalFee[tx.vout[i].nAsset.GetAsset()] += fee;
if (!MoneyRange(totalFee)) {
return false;
}
}
}
return MoneyRange(totalFee);
return true;
}

CAmountMap GetFeeMap(const CTransaction& tx) {
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3 changes: 3 additions & 0 deletions src/consensus/tx_verify.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -306,6 +306,9 @@ bool CheckTxInputs(const CTransaction& tx, CValidationState& state, const CCoins
return state.DoS(100, false, REJECT_INVALID, "bad-txns-in-ne-out", false, "value in != value out");
}
fee_map += GetFeeMap(tx);
if (!MoneyRange(fee_map)) {
return state.DoS(100, false, REJECT_INVALID, "bad-block-total-fee-outofrange");
}
} else {
const CAmount value_out = tx.GetValueOutMap()[CAsset()];
if (nValueIn < value_out) {
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