From 7c86ccaefb2827230b7a31ac62444ebcb535d70c Mon Sep 17 00:00:00 2001
From: Mirco Miranda <mirco.miranda@systemceramics.com>
Date: Mon, 23 Mar 2026 12:05:01 +0100
Subject: [PATCH] IFF: fix Integer-overflow in IDATChunk::strideSize

---
 src/imageformats/chunks.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/imageformats/chunks.cpp b/src/imageformats/chunks.cpp
index 35b12fe..ccecd89 100644
--- a/src/imageformats/chunks.cpp
+++ b/src/imageformats/chunks.cpp
@@ -3092,7 +3092,8 @@ quint32 IDATChunk::strideSize(const IHDRChunk *header) const
         return 0;
     }
 
-    auto rs = (header->width() * header->depth() + 7) / 8;
+    // width() and depth() are at most 65535
+    auto rs = (quint32(header->width()) * header->depth() + 7) / 8;
 
     // No padding bytes are inserted in the data.
     if (header->model() == IHDRChunk::Rgb888) {