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Merge bitcoin/bitcoin#24139: Avoid unsigned integer overflow in bitcoin-tx

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faa75fa19335e3e826efa4f2280609a2db34425d Avoid unsigned integer overflow in bitcoin-tx (MarcoFalke)

Pull request description:

  While `npos` means "largest unsigned value" and adding `1` to it yields `0`, it may be clearer to just assign `0` to it and only increment otherwise.

  This also allows to remove a file-wide suppression for `unsigned-integer-overflow`.

ACKs for top commit:
  hebasto:
    ACK faa75fa19335e3e826efa4f2280609a2db34425d, I have reviewed the code and it looks OK, I agree it can be merged.
  theStack:
    Code-review ACK faa75fa19335e3e826efa4f2280609a2db34425d

Tree-SHA512: c24436641e5d801341c948b812c7f711d5dff70efdf04af00fd3221f4b81d93f25608dddaa36230ba81ca7ab0d18bdd957095d4561e22621e4d69017934f0a16
This commit is contained in:
MarcoFalke 2022-01-28 15:26:21 +01:00 committed by Vijay
parent 98f7e82d07
commit e4c8ea5061
No known key found for this signature in database
GPG Key ID: 47820EC166FDF549
2 changed files with 5 additions and 3 deletions
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7
src/bitcoin-tx.cpp
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@ -383,13 +383,16 @@ static void MutateTxAddOutData(CMutableTransaction& tx, const std::string& strIn
if (pos==0) if (pos==0)
throw std::runtime_error("TX output value not specified"); throw std::runtime_error("TX output value not specified");
if (pos != std::string::npos) { if (pos == std::string::npos) {
pos = 0;
} else {
// Extract and validate VALUE // Extract and validate VALUE
value = ExtractAndValidateValue(strInput.substr(0, pos)); value = ExtractAndValidateValue(strInput.substr(0, pos));
++pos;
} }
// extract and validate DATA // extract and validate DATA
std::string strData = strInput.substr(pos + 1, std::string::npos); const std::string strData{strInput.substr(pos, std::string::npos)};
if (!IsHex(strData)) if (!IsHex(strData))
throw std::runtime_error("invalid TX output data"); throw std::runtime_error("invalid TX output data");

1
test/sanitizer_suppressions/ubsan
View File

@ -21,7 +21,6 @@ unsigned-integer-overflow:addrman.cpp
unsigned-integer-overflow:arith_uint256.h unsigned-integer-overflow:arith_uint256.h
unsigned-integer-overflow:basic_string.h unsigned-integer-overflow:basic_string.h
unsigned-integer-overflow:bench/bench.h unsigned-integer-overflow:bench/bench.h
unsigned-integer-overflow:bitcoin-tx.cpp
unsigned-integer-overflow:bloom.cpp unsigned-integer-overflow:bloom.cpp
unsigned-integer-overflow:chain.cpp unsigned-integer-overflow:chain.cpp
unsigned-integer-overflow:chain.h unsigned-integer-overflow:chain.h