mdss: mdp3: Validate input from userspace



Fully verify that the values from client are safe to use.

Change-Id: I73d6839f5bccd53b8bc2d812dc7673b13735299c
Signed-off-by: Terence Hampson <thampson@codeaurora.org>

parent 66d0b021

drivers/video/msm/mdss/mdp3_ctrl.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -1218,7 +1218,8 @@ static int mdp3_ctrl_lut_update(struct msm_fb_data_type *mfd,
		if (!mdp3_session->dma->config_lut)
		return -EINVAL;

		if (cmap->start + cmap->len > MDP_LUT_SIZE) {
		if (cmap->start > MDP_LUT_SIZE \|\| cmap->len > MDP_LUT_SIZE \|\|
		(cmap->start + cmap->len > MDP_LUT_SIZE)) {
		pr_err("mdp3_ctrl_lut_update invalid arguments\n");
		return -EINVAL;
		}