mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-12-12 01:14:22 -05:00
48 lines
1.7 KiB
Diff
48 lines
1.7 KiB
Diff
From d815f54f15d765b5e0035a9d208d71567bcaace0 Mon Sep 17 00:00:00 2001
|
|
From: zhaoyuan <yzhao@codeaurora.org>
|
|
Date: Mon, 20 Feb 2017 13:42:20 +0800
|
|
Subject: msm: mdss: hdmi: check up-bound of CEC frame size
|
|
|
|
the spec says the frame size will not be greater than
|
|
14, but this have a security hole when somebody sends
|
|
a message with a size greater than 14. So need check
|
|
up-boud of the CEC frame size.
|
|
|
|
Change-Id: I743208badc5e77ae911cfb2d102f758d4843138f
|
|
Signed-off-by: zhaoyuan <yzhao@codeaurora.org>
|
|
---
|
|
drivers/video/fbdev/msm/mdss_hdmi_cec.c | 6 +++---
|
|
1 file changed, 3 insertions(+), 3 deletions(-)
|
|
|
|
diff --git a/drivers/video/fbdev/msm/mdss_hdmi_cec.c b/drivers/video/fbdev/msm/mdss_hdmi_cec.c
|
|
index a424d98..a4ed012 100644
|
|
--- a/drivers/video/fbdev/msm/mdss_hdmi_cec.c
|
|
+++ b/drivers/video/fbdev/msm/mdss_hdmi_cec.c
|
|
@@ -1,4 +1,4 @@
|
|
-/* Copyright (c) 2010-2016, The Linux Foundation. All rights reserved.
|
|
+/* Copyright (c) 2010-2017, The Linux Foundation. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 and
|
|
@@ -196,7 +196,7 @@ static void hdmi_cec_msg_recv(struct work_struct *work)
|
|
msg.sender_id, msg.recvr_id,
|
|
msg.frame_size);
|
|
|
|
- if (msg.frame_size < 1) {
|
|
+ if (msg.frame_size < 1 || msg.frame_size > MAX_CEC_FRAME_SIZE) {
|
|
DEV_ERR("%s: invalid message (frame length = %d)\n",
|
|
__func__, msg.frame_size);
|
|
return;
|
|
@@ -216,7 +216,7 @@ static void hdmi_cec_msg_recv(struct work_struct *work)
|
|
msg.operand[i] = data & 0xFF;
|
|
}
|
|
|
|
- for (; i < 14; i++)
|
|
+ for (; i < MAX_OPERAND_SIZE; i++)
|
|
msg.operand[i] = 0;
|
|
|
|
DEV_DBG("%s: opcode 0x%x, wakup_en %d, device_suspend %d\n", __func__,
|
|
--
|
|
cgit v1.1
|
|
|