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Commit 014fa8de authored by raghavendra ambadas's avatar raghavendra ambadas Committed by Gerrit - the friendly Code Review server
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msm: mdp: Validate input arguments from user space



Fully verify the input arguments from user client are safe
to use.

Change-Id: Ie14332443b187951009c63ebfb78456dcd9ba60f
Signed-off-by: default avatarRaghavendra Ambadas <rambad@codeaurora.org>
parent 6fa3bc32
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+5 −0
Original line number Diff line number Diff line
@@ -485,6 +485,11 @@ static int mdp_lut_hw_update(struct fb_cmap *cmap)
	c[1] = cmap->blue;
	c[2] = cmap->red;

	if (cmap->start > MDP_HIST_LUT_SIZE || cmap->len > MDP_HIST_LUT_SIZE ||
			(cmap->start + cmap->len > MDP_HIST_LUT_SIZE)) {
		pr_err("mdp_lut_hw_update invalid arguments\n");
		return -EINVAL;
	}
	for (i = 0; i < cmap->len; i++) {
		if (copy_from_user(&r, cmap->red++, sizeof(r)) ||
		    copy_from_user(&g, cmap->green++, sizeof(g)) ||