From: Holger Schemel <info@artsoft.org>
Date: Tue, 29 Jun 2021 11:29:02 +0000 (+0200)
Subject: fixed potential crash bug when processing manipulated tape files
X-Git-Tag: 4.3.0.0~114
X-Git-Url: https://git.artsoft.org/?p=rocksndiamonds.git;a=commitdiff_plain;h=3f22ee3ec11b053261ba98f08d29ed71f2d1c232

fixed potential crash bug when processing manipulated tape files
---

diff --git a/src/tape.c b/src/tape.c
index 0c99d680..449e7960 100644
--- a/src/tape.c
+++ b/src/tape.c
@@ -312,7 +312,8 @@ static void DrawVideoDisplay_DateTime(unsigned int state, unsigned int value)
       char s[MAX_DATETIME_STRING_SIZE];
       int year2 = value / 10000;
       int year4 = (year2 < 70 ? 2000 + year2 : 1900 + year2);
-      int month_index = (value / 100) % 100;
+      int month_index_raw = (value / 100) % 100;
+      int month_index = month_index_raw % 12;	// prevent invalid index
       int month = month_index + 1;
       int day = value % 100;