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Commit 6600cc30 authored by Ian Armstrong's avatar Ian Armstrong Committed by Mauro Carvalho Chehab
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[media] ivtvfb: Add sanity check to ivtvfb_pan_display() 



Add sanity check to ivtvfb_pan_display() to ensure only valid values are used
to pan the display. Invalid values are rejected with -EINVAL

Signed-off-by: default avatarIan Armstrong <ian@iarmst.demon.co.uk>
Signed-off-by: default avatarAndy Walls <awalls@md.metrocast.net>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 5d9c08de

drivers/media/video/ivtv/ivtvfb.c

+4 −0
Original line number Diff line number Diff line
@@ -836,6 +836,10 @@ static int ivtvfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *inf 
	u32 osd_pan_index;

	struct ivtv *itv = (struct ivtv *) info->par;



	if (var->yoffset + info->var.yres > info->var.yres_virtual ||

	    var->xoffset + info->var.xres > info->var.xres_virtual)

		return -EINVAL;



	osd_pan_index = var->yoffset * info->fix.line_length

		      + var->xoffset * info->var.bits_per_pixel / 8;

	write_reg(osd_pan_index, 0x02A0C);