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XCF: Fix OSS Fuzz issue 42527849

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Fixes integer overflow when the value is -INT_MAX-1
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Mirco Miranda 2024-12-23 22:05:05 +00:00 committed by Christoph Cullmann
parent 1cb294545f
commit 348ddce987
1 changed files with 5 additions and 4 deletions
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9
src/imageformats/xcf.cpp
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@ -1305,21 +1305,22 @@ bool XCFImageFormat::loadLayerProperties(QDataStream &xcf_io, Layer &layer)
case PROP_COMPOSITE_SPACE:
property >> layer.compositeSpace;
if (layer.compositeSpace < 0) {
layer.compositeSpace = GimpColorSpace(-layer.compositeSpace);
layer.compositeSpace = GimpColorSpace(layer.compositeSpace == std::numeric_limits<qint32>::lowest() ? 0 : -layer.compositeSpace);
}
break;
case PROP_COMPOSITE_MODE:
property >> layer.compositeMode;
if (layer.compositeMode < 0) {
layer.compositeMode = XCFImageFormat::GimpCompositeMode(-layer.compositeMode);
layer.compositeMode =
XCFImageFormat::GimpCompositeMode(layer.compositeMode == std::numeric_limits<qint32>::lowest() ? 0 : -layer.compositeMode);
}
break;
case PROP_BLEND_SPACE:
property >> layer.blendSpace;
if (layer.blendSpace) {
layer.blendSpace = GimpColorSpace(-layer.blendSpace);
if (layer.blendSpace < 0) {
layer.blendSpace = GimpColorSpace(layer.blendSpace == std::numeric_limits<qint32>::lowest() ? 0 : -layer.blendSpace);
}
break;