From 07a271a2d5b3ba8bc70e3acf82e4e57414548b6b Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Tue, 14 Jan 2025 17:50:07 +0100
Subject: [PATCH] LERC: avoid potential integer overflow (fixes
 https://github.com/OSGeo/gdal/security/code-scanning/626)

---
 frmts/mrf/LERCV1/Lerc1Image.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/frmts/mrf/LERCV1/Lerc1Image.cpp b/frmts/mrf/LERCV1/Lerc1Image.cpp
index ec44b0885765..c48c321e0d39 100644
--- a/frmts/mrf/LERCV1/Lerc1Image.cpp
+++ b/frmts/mrf/LERCV1/Lerc1Image.cpp
@@ -957,7 +957,8 @@ bool Lerc1Image::readZTile(Byte **ppByte, size_t &nRemainingBytes, int r0,
         return true;
     }
 
-    idataVec.resize((r1 - r0) * (c1 - c0));  // max size, gets adjusted
+    idataVec.resize(static_cast<size_t>(r1 - r0) *
+                    (c1 - c0));  // max size, gets adjusted
     if (!blockread(&ptr, nRemainingBytes, idataVec))
         return false;