From: Holger Schemel <info@artsoft.org>
Date: Sat, 27 Aug 2022 08:55:09 +0000 (+0200)
Subject: fixed crash bug when accessing invalid group data for broken level files
X-Git-Tag: 4.3.3.0~71
X-Git-Url: https://git.artsoft.org/?a=commitdiff_plain;h=530042f134f8d59f80a7c71168d65edc0da1be10;p=rocksndiamonds.git

fixed crash bug when accessing invalid group data for broken level files

Thanks to Quipyowert for finding and fixing this bug!
---

diff --git a/src/files.c b/src/files.c
index 45f4097f..49fe4856 100644
--- a/src/files.c
+++ b/src/files.c
@@ -3388,6 +3388,9 @@ static int LoadLevel_GRPX(File *file, int chunk_size, struct LevelInfo *level)
   struct ElementInfo *ei = &element_info[element];
   struct ElementGroupInfo *group = ei->group;
 
+  if (group == NULL)
+    return -1;
+
   xx_ei = *ei;		// copy element data into temporary buffer
   xx_group = *group;	// copy group data into temporary buffer