From a675806c91dad63a6c4f635e7ed6cc3cf951aac1 Mon Sep 17 00:00:00 2001
From: Alibek Omarov <a1ba.omarov@gmail.com>
Date: Mon, 11 Dec 2023 07:06:12 +0300
Subject: [PATCH] engine: imagelib: img_ktx2: don't allow to load images with
 no mip levels

---
 engine/common/imagelib/img_ktx2.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/engine/common/imagelib/img_ktx2.c b/engine/common/imagelib/img_ktx2.c
index a33f563b..04f30657 100644
--- a/engine/common/imagelib/img_ktx2.c
+++ b/engine/common/imagelib/img_ktx2.c
@@ -87,6 +87,12 @@ static qboolean Image_KTX2Parse( const ktx2_header_t *header, const byte *buffer
 		return false;
 	}
 
+	if( header->levelCount == 0 )
+	{
+		Con_DPrintf( S_ERROR "%s: file has no mip levels\n", __FUNCTION__ );
+		return false;
+	}
+
 	if( header->pixelDepth > 1 )
 	{
 		Con_DPrintf( S_ERROR "%s: unsupported KTX2 pixelDepth %d\n", __FUNCTION__, header->pixelDepth );