mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
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34 lines
1.1 KiB
Diff
34 lines
1.1 KiB
Diff
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From 014fa8def84c62893fa016e873c12de1da498603 Mon Sep 17 00:00:00 2001
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From: raghavendra ambadas <rambad@codeaurora.org>
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Date: Mon, 6 Oct 2014 14:59:57 +0530
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Subject: msm: mdp: Validate input arguments from user space
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Fully verify the input arguments from user client are safe
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to use.
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Change-Id: Ie14332443b187951009c63ebfb78456dcd9ba60f
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Signed-off-by: Raghavendra Ambadas <rambad@codeaurora.org>
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---
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drivers/video/msm/mdp.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/drivers/video/msm/mdp.c b/drivers/video/msm/mdp.c
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index 4ede0b52..c00bd78 100644
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--- a/drivers/video/msm/mdp.c
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+++ b/drivers/video/msm/mdp.c
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@@ -485,6 +485,11 @@ static int mdp_lut_hw_update(struct fb_cmap *cmap)
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c[1] = cmap->blue;
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c[2] = cmap->red;
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+ if (cmap->start > MDP_HIST_LUT_SIZE || cmap->len > MDP_HIST_LUT_SIZE ||
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+ (cmap->start + cmap->len > MDP_HIST_LUT_SIZE)) {
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+ pr_err("mdp_lut_hw_update invalid arguments\n");
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+ return -EINVAL;
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+ }
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for (i = 0; i < cmap->len; i++) {
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if (copy_from_user(&r, cmap->red++, sizeof(r)) ||
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copy_from_user(&g, cmap->green++, sizeof(g)) ||
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--
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cgit v1.1
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