From 7642633551d94e1cd3a548dcb5637ac14d414532 Mon Sep 17 00:00:00 2001
From: Albert Astals Cid <aacid@kde.org>
Date: Thu, 19 Aug 2021 17:29:44 +0200
Subject: [PATCH] SGIImage::writeImage: Properly fail if the image is too big

---
 src/imageformats/rgb.cpp | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/imageformats/rgb.cpp b/src/imageformats/rgb.cpp
index a04bc33..20f2f43 100644
--- a/src/imageformats/rgb.cpp
+++ b/src/imageformats/rgb.cpp
@@ -681,9 +681,16 @@ bool SGIImage::writeImage(const QImage &image)
         return false;
     }
 
+    const int w = img.width();
+    const int h = img.height();
+
+    if (w > 65536 || h > 65536) {
+        return false;
+    }
+
     _bpc = 1;
-    _xsize = img.width();
-    _ysize = img.height();
+    _xsize = w;
+    _ysize = h;
     _pixmin = ~0u;
     _pixmax = 0;
     _colormap = NORMAL;