Index: sys/dev/vt/hw/fb/vt_fb.c
===================================================================
diff -u -N -r2fca1794c0bb36b59353746a1078e99cc55cfa38 -rdbe4b0fb902275476d3572245272b4e45759127e
--- sys/dev/vt/hw/fb/vt_fb.c	(.../vt_fb.c)	(revision 2fca1794c0bb36b59353746a1078e99cc55cfa38)
+++ sys/dev/vt/hw/fb/vt_fb.c	(.../vt_fb.c)	(revision dbe4b0fb902275476d3572245272b4e45759127e)
@@ -228,12 +228,12 @@
 		break;
 	case 2:
 		for (h = 0; h < info->fb_height; h++)
-			for (o = 0; o < info->fb_stride; o += 2)
+			for (o = 0; o < info->fb_stride - 1; o += 2)
 				vt_fb_mem_wr2(info, h*info->fb_stride + o, c);
 		break;
 	case 3:
 		for (h = 0; h < info->fb_height; h++)
-			for (o = 0; o < info->fb_stride; o += 3) {
+			for (o = 0; o < info->fb_stride - 2; o += 3) {
 				vt_fb_mem_wr1(info, h*info->fb_stride + o,
 				    (c >> 16) & 0xff);
 				vt_fb_mem_wr1(info, h*info->fb_stride + o + 1,
@@ -244,7 +244,7 @@
 		break;
 	case 4:
 		for (h = 0; h < info->fb_height; h++)
-			for (o = 0; o < info->fb_stride; o += 4)
+			for (o = 0; o < info->fb_stride - 3; o += 4)
 				vt_fb_mem_wr4(info, h*info->fb_stride + o, c);
 		break;
 	default: