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warn on negative data size from qCompress() function

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Signed-off-by: Ivailo Monev <xakepa10@laimg.moc>
This commit is contained in:
Ivailo Monev 2019-12-27 05:24:04 +00:00
parent 81948e43d7
commit 8a08a87708
1 changed files with 4 additions and 3 deletions
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7
src/core/tools/qbytearray.cpp
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@ -405,13 +405,14 @@ QByteArray qCompress(const uchar* data, int nbytes, int compressionLevel)
#ifdef QT_FAST_COMPRESS
return qFastCompress(reinterpret_cast<const char*>(data), nbytes, compressionLevel);
#else
if (nbytes == 0) {
return QByteArray(4, '\0');
}
if (Q_UNLIKELY(!data)) {
qWarning("qCompress: Data is null");
return QByteArray();
} else if (Q_UNLIKELY(nbytes <= 0)) {
qWarning("qCompress: Data size is negative or zero");
return QByteArray(4, '\0');
}
if (compressionLevel < -1 || compressionLevel > 9)
compressionLevel = -1;