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https://github.com/Divested-Mobile/DivestOS-Build.git
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48 lines
1.7 KiB
Diff
48 lines
1.7 KiB
Diff
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From d815f54f15d765b5e0035a9d208d71567bcaace0 Mon Sep 17 00:00:00 2001
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From: zhaoyuan <yzhao@codeaurora.org>
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Date: Mon, 20 Feb 2017 13:42:20 +0800
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Subject: msm: mdss: hdmi: check up-bound of CEC frame size
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the spec says the frame size will not be greater than
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14, but this have a security hole when somebody sends
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a message with a size greater than 14. So need check
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up-boud of the CEC frame size.
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Change-Id: I743208badc5e77ae911cfb2d102f758d4843138f
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Signed-off-by: zhaoyuan <yzhao@codeaurora.org>
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---
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drivers/video/fbdev/msm/mdss_hdmi_cec.c | 6 +++---
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1 file changed, 3 insertions(+), 3 deletions(-)
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diff --git a/drivers/video/fbdev/msm/mdss_hdmi_cec.c b/drivers/video/fbdev/msm/mdss_hdmi_cec.c
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index a424d98..a4ed012 100644
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--- a/drivers/video/fbdev/msm/mdss_hdmi_cec.c
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+++ b/drivers/video/fbdev/msm/mdss_hdmi_cec.c
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@@ -1,4 +1,4 @@
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-/* Copyright (c) 2010-2016, The Linux Foundation. All rights reserved.
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+/* Copyright (c) 2010-2017, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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@@ -196,7 +196,7 @@ static void hdmi_cec_msg_recv(struct work_struct *work)
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msg.sender_id, msg.recvr_id,
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msg.frame_size);
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- if (msg.frame_size < 1) {
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+ if (msg.frame_size < 1 || msg.frame_size > MAX_CEC_FRAME_SIZE) {
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DEV_ERR("%s: invalid message (frame length = %d)\n",
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__func__, msg.frame_size);
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return;
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@@ -216,7 +216,7 @@ static void hdmi_cec_msg_recv(struct work_struct *work)
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msg.operand[i] = data & 0xFF;
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}
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- for (; i < 14; i++)
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+ for (; i < MAX_OPERAND_SIZE; i++)
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msg.operand[i] = 0;
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DEV_DBG("%s: opcode 0x%x, wakup_en %d, device_suspend %d\n", __func__,
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--
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cgit v1.1
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