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Fix division by zero

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Consider a zero we need to divide with illegal input.

Fixes oss-fuzz 29347

Change-Id: I2aae1d765d2dd81c95d423038ef5cb878d4f8026
Reviewed-by: Robert Löhning <robert.loehning@qt.io>
(cherry picked from commit 16b8d766abe86868597b30cec03152355ee1a91b)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
This commit is contained in:
Allan Sandfeld Jensen 2021-01-26 19:29:22 +01:00 committed by Qt Cherry-pick Bot
parent 86af184205
commit fada6a1cbd
1 changed files with 4 additions and 0 deletions
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4
src/gui/painting/qicc.cpp
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@ -524,6 +524,8 @@ bool parseTRC(const QByteArray &data, const TagEntry &tagEntry, QColorTrc &gamma
return false;
std::array<quint32_be, 3> parameters =
qFromUnaligned<decltype(parameters)>(data.constData() + parametersOffset);
if (parameters[1] == 0)
return false;
float g = fromFixedS1516(parameters[0]);
float a = fromFixedS1516(parameters[1]);
float b = fromFixedS1516(parameters[2]);
@ -537,6 +539,8 @@ bool parseTRC(const QByteArray &data, const TagEntry &tagEntry, QColorTrc &gamma
return false;
std::array<quint32_be, 4> parameters =
qFromUnaligned<decltype(parameters)>(data.constData() + parametersOffset);
if (parameters[1] == 0)
return false;
float g = fromFixedS1516(parameters[0]);
float a = fromFixedS1516(parameters[1]);
float b = fromFixedS1516(parameters[2]);