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hgafb: use display information in info not in var for panning

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We must not use any information in the passed var besides xoffset,
yoffset and vmode as otherwise applications might abuse it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Ferenc Bakonyi <fero@drama.obuda.kando.hu>
Cc: Brent Cook <busterb@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Laurent Pinchart 2011-06-14 09:24:49 +00:00 committed by Paul Mundt
parent ff55fe9ac1
commit df2d798109
1 changed files with 2 additions and 2 deletions
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4
drivers/video/hgafb.c
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@ -422,8 +422,8 @@ static int hgafb_pan_display(struct fb_var_screeninfo *var,
var->xoffset)
return -EINVAL;
} else {
if (var->xoffset + var->xres > info->var.xres_virtual
|| var->yoffset + var->yres > info->var.yres_virtual
if (var->xoffset + info->var.xres > info->var.xres_virtual
|| var->yoffset + info->var.yres > info->var.yres_virtual
|| var->yoffset % 8)
return -EINVAL;
}