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xcf: Fix Stack-buffer-overflow WRITE on broken files

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oss-fuzz/33742
This commit is contained in:
Albert Astals Cid 2021-04-30 00:07:21 +02:00 committed by David Faure
parent 55b4077f2c
commit 297ed9a2fe
1 changed files with 6 additions and 0 deletions
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6
src/imageformats/xcf.cpp
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@ -537,6 +537,7 @@ inline QRgb qRgba(const QRgb rgb, int a)
*/
XCFImageFormat::XCFImageFormat()
{
static_assert(sizeof(QRgb) == 4, "the code assumes sizeof(QRgb) == 4, if that's not your case, help us fix it :)");
}
/*!
@ -1361,6 +1362,11 @@ bool XCFImageFormat::loadHierarchy(QDataStream &xcf_io, Layer &layer)
break;
}
if (bpp > 4) {
qCDebug(XCFPLUGIN) << "bpp is" << bpp << "We don't support layers with bpp > 4";
return false;
}
// GIMP stores images in a "mipmap"-like format (multiple levels of
// increasingly lower resolution). Only the top level is used here,
// however.