4.4-stable review patch. If anyone has any objections, please let me know.
------------------ From: Sinclair Yeh <[email protected]> commit 7851496a32319237456919575e5f4ba62f74cc7d upstream. mode->hdisplay * (var->bits_per_pixel + 7) gets evaluated before the division, potentially making the pitch larger than it should be. Since the original intention is to do a div-round-up, just use the macro instead. Signed-off-by: Sinclair Yeh <[email protected]> Reviewed-by: Thomas Hellstrom <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/gpu/drm/vmwgfx/vmwgfx_fb.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/drivers/gpu/drm/vmwgfx/vmwgfx_fb.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_fb.c @@ -573,9 +573,9 @@ static int vmw_fb_set_par(struct fb_info mode = old_mode; old_mode = NULL; } else if (!vmw_kms_validate_mode_vram(vmw_priv, - mode->hdisplay * - (var->bits_per_pixel + 7) / 8, - mode->vdisplay)) { + mode->hdisplay * + DIV_ROUND_UP(var->bits_per_pixel, 8), + mode->vdisplay)) { drm_mode_destroy(vmw_priv->dev, mode); return -EINVAL; }
