--- linux-2.6.15-rc5/drivers/scsi/megaraid.c.orig	2005-12-04 00:10:42.000000000 -0500
+++ linux/drivers/scsi/megaraid.c	2005-12-07 17:41:30.000000000 -0500
@@ -664,7 +664,7 @@
 					sg->offset;
 			} else
 				buf = cmd->request_buffer;
-			memset(cmd->request_buffer, 0, cmd->cmnd[4]);
+			memset(buf, 0, cmd->cmnd[4]);
 			if (cmd->use_sg) {
 				struct scatterlist *sg;