From: H. Peter Anvin <hpa@zytor.com>
Date: Sun, 14 Feb 2010 22:11:15 +0000 (-0800)
Subject: sysdump: guard against a nonsensical month number
X-Git-Tag: syslinux-4.00-pre21~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=97a0ccf075ff62f1cf8deafe701e182a60515a8e;p=platform%2Fupstream%2Fsyslinux.git

sysdump: guard against a nonsensical month number

If the month is off the table, don't even try to read it...

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
---

diff --git a/com32/sysdump/ctime.c b/com32/sysdump/ctime.c
index 5af8566..56c8efb 100644
--- a/com32/sysdump/ctime.c
+++ b/com32/sysdump/ctime.c
@@ -58,6 +58,13 @@ uint32_t posix_time(void)
 	mo += 12;
     }
 
+    /*
+     * Just in case: if the month is nonsense, don't read off the end
+     * of the table...
+     */
+    if (mo-3 > 11)
+	return 0;
+
     t = y*365 + y/4 - y/100 + y/400 + yday[mo-3] + d - 719469;
     t *= 24;
     t += h;