From 30466aaf161a8a594fe70d660c9f5f8604fdc433 Mon Sep 17 00:00:00 2001
From: Kim Kulling <kimkulling@users.noreply.github.com>
Date: Fri, 24 May 2024 15:36:30 +0200
Subject: [PATCH] Fix possible nullptr dereferencing. (#5595)

---
 code/Common/Subdivision.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/code/Common/Subdivision.cpp b/code/Common/Subdivision.cpp
index fc8ab2099..78c249807 100644
--- a/code/Common/Subdivision.cpp
+++ b/code/Common/Subdivision.cpp
@@ -524,7 +524,11 @@ void CatmullClarkSubdivider::InternSubdivide(
                                     }
                                 }
 
-                                ai_assert(adj[o] - moffsets[nidx].first < mp->mNumFaces);
+                                if (mp == nullptr) {
+                                    continue;
+                                }
+
+                                ai_assert(adj[o] - moffsets[nidx].first < mp->mNumFaces);                                
                                 const aiFace &f = mp->mFaces[adj[o] - moffsets[nidx].first];
                                 bool haveit = false;