From fe84905b1762c821fbc0ef1db97b8df885e6cce1 Mon Sep 17 00:00:00 2001
From: Andrey Kleshchev <andreykproductengine@lindenlab.com>
Date: Wed, 21 May 2025 21:53:59 +0300
Subject: #4128 Crash on mInvBindMatrix

---
 indra/newview/llskinningutil.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'indra/newview/llskinningutil.cpp')

diff --git a/indra/newview/llskinningutil.cpp b/indra/newview/llskinningutil.cpp
index cee43f3cff..43836a420b 100644
--- a/indra/newview/llskinningutil.cpp
+++ b/indra/newview/llskinningutil.cpp
@@ -135,6 +135,12 @@ void LLSkinningUtil::initSkinningMatrixPalette(
 
     initJointNums(const_cast<LLMeshSkinInfo*>(skin), avatar);
 
+    if (skin->mInvBindMatrix.size() < count )
+    {
+        // faulty model? mInvBindMatrix.size() should have matched mJointNames.size()
+        return;
+    }
+
     LLMatrix4a world[LL_CHARACTER_MAX_ANIMATED_JOINTS];
 
     for (S32 j = 0; j < count; ++j)
-- 
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