From 9dcedc184c2e17a0a7b3ebe7894c510de7ff9833 Mon Sep 17 00:00:00 2001
From: Allan Sandfeld Jensen <allan.jensen@qt.io>
Date: Fri, 21 Jun 2024 13:40:37 +0200
Subject: [PATCH] Avoid assert on nonsense input
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Fixes oss-fuzz 69439. Credit to OSS-Fuzz for finding the case.

Change-Id: I5211900073377c7bdccb904dbc6ff172419e76f1
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
Reviewed-by: Robert Löhning <robert.loehning@qt.io>
(cherry picked from commit 913cc91c0abb8087a85984930049f208965b05c9)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 src/gui/painting/qicc.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/gui/painting/qicc.cpp b/src/gui/painting/qicc.cpp
index 70bdf28b214..dd366ef0199 100644
--- a/src/gui/painting/qicc.cpp
+++ b/src/gui/painting/qicc.cpp
@@ -1935,7 +1935,7 @@ bool fromIccProfile(const QByteArray &data, QColorSpace *colorSpace)
     QColorSpacePrivate *colorspaceDPtr = QColorSpacePrivate::get(*colorSpace);
 
     colorspaceDPtr->isPcsLab = (header.pcs == uint(Tag::Lab_));
-    if (tagIndex.contains(Tag::cicp)) {
+    if (tagIndex.contains(Tag::cicp) && header.inputColorSpace == uint(ColorSpaceType::Rgb)) {
         // Let cicp override nLut profiles if we fully recognize it.
         if (parseCicp(data, tagIndex[Tag::cicp], colorspaceDPtr))
             threeComponentMatrix = true;