From 62486c6e7c724143b9bc92eda26393249210ff70 Mon Sep 17 00:00:00 2001
From: Kim Kulling <kimkulling@users.noreply.github.com>
Date: Fri, 2 Dec 2022 09:24:51 +0100
Subject: [PATCH] FIX: Fix possible division by zero

- closes https://github.com/assimp/assimp/issues/4819
---
 code/AssetLib/MDL/MDLLoader.cpp | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/code/AssetLib/MDL/MDLLoader.cpp b/code/AssetLib/MDL/MDLLoader.cpp
index f4b4c4d26..b60657805 100644
--- a/code/AssetLib/MDL/MDLLoader.cpp
+++ b/code/AssetLib/MDL/MDLLoader.cpp
@@ -405,11 +405,13 @@ void MDLImporter::InternReadFile_Quake1() {
                 }
                 // go to the end of the skin section / the beginning of the next skin
                 bool overflow = false;
-                if ((pcHeader->skinheight > INT_MAX / pcHeader->skinwidth) || (pcHeader->skinwidth > INT_MAX / pcHeader->skinheight)){
-                    overflow = true;
-                }
-                if (!overflow) {
-                    szCurrent += pcHeader->skinheight * pcHeader->skinwidth +sizeof(float) * iNumImages;
+                if (pcHeader->skinwidth != 0 || pcHeader->skinheight != 0) {
+                    if ((pcHeader->skinheight > INT_MAX / pcHeader->skinwidth) || (pcHeader->skinwidth > INT_MAX / pcHeader->skinheight)){
+                        overflow = true;
+                    }
+                    if (!overflow) {
+                        szCurrent += pcHeader->skinheight * pcHeader->skinwidth +sizeof(float) * iNumImages;
+                    }
                 }
             }
         } else {