[OpenBIOS] r564 - trunk/openbios-devel/modules

[svn at openbios.org]

Author: blueswirl
Date: 2009-08-22 08:03:20 +0200 (Sat, 22 Aug 2009)
New Revision: 564

Modified:
   trunk/openbios-devel/modules/console_common.c
Log:
Allow NULL string argument without accessing page zero.

Signed-off-by: Blue Swirl <blauwirbel at gmail.com>

Modified: trunk/openbios-devel/modules/console_common.c
===================================================================
--- trunk/openbios-devel/modules/console_common.c	2009-08-21 19:15:55 UTC (rev 563)
+++ trunk/openbios-devel/modules/console_common.c	2009-08-22 06:03:20 UTC (rev 564)
@@ -386,6 +386,10 @@
         unsigned int y, x;
         unsigned char ch;
 
+	if (!str) {
+		return 0;
+	}
+
 	if( !cons.inited && console_init() )
 		return -1;