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11c7037780
DivestOS/Patches/Linux_CVEs/CVE-2016-5344/ANY/0001.patch
Tad 11c7037780 Switch to new CVE patchset
2017-11-07 17:32:46 -05:00

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From 64e15c36d6c1c57dc2d95a3f163bc830a469fc20 Mon Sep 17 00:00:00 2001
From: Dhaval Patel <pdhaval@codeaurora.org>
Date: Tue, 22 Mar 2016 22:56:38 -0700
Subject: msm: mdss: validate layer count before copying userdata
Validate input layer count in rotator and async update
ioctl call before copying the rotator request list and
async update layer list.
Change-Id: I3489e5a2d4237a47bddf56c2f44c9e3001f0b2b4
Signed-off-by: Dhaval Patel <pdhaval@codeaurora.org>
---
drivers/video/msm/mdss/mdss_compat_utils.c | 6 +++---
drivers/video/msm/mdss/mdss_fb.c | 6 +++---
drivers/video/msm/mdss/mdss_fb.h | 3 +--
drivers/video/msm/mdss/mdss_mdp.h | 4 +++-
drivers/video/msm/mdss/mdss_rotator.c | 20 +++++++++++++++++---
5 files changed, 27 insertions(+), 12 deletions(-)
diff --git a/drivers/video/msm/mdss/mdss_compat_utils.c b/drivers/video/msm/mdss/mdss_compat_utils.c
index 3bc5de6..e391a5a 100644
--- a/drivers/video/msm/mdss/mdss_compat_utils.c
+++ b/drivers/video/msm/mdss/mdss_compat_utils.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2013-2016, The Linux Foundation. All rights reserved.
* Copyright (C) 1994 Martin Schaller
*
* 2001 - Documented with DocBook
@@ -445,8 +445,8 @@ static int __compat_async_position_update(struct fb_info *info,
update_pos.input_layer_cnt = update_pos32.input_layer_cnt;
layer_cnt = update_pos32.input_layer_cnt;
- if (!layer_cnt) {
- pr_err("no async layer to update\n");
+ if ((!layer_cnt) || (layer_cnt > MAX_LAYER_COUNT)) {
+ pr_err("invalid async layers :%d to update\n", layer_cnt);
return -EINVAL;
}
diff --git a/drivers/video/msm/mdss/mdss_fb.c b/drivers/video/msm/mdss/mdss_fb.c
index 73ab61e..9aa87d0 100644
--- a/drivers/video/msm/mdss/mdss_fb.c
+++ b/drivers/video/msm/mdss/mdss_fb.c
@@ -2,7 +2,7 @@
* Core MDSS framebuffer driver.
*
* Copyright (C) 2007 Google Incorporated
- * Copyright (c) 2008-2015, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2008-2016, The Linux Foundation. All rights reserved.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
@@ -3781,8 +3781,8 @@ static int mdss_fb_async_position_update_ioctl(struct fb_info *info,
input_layer_list = update_pos.input_layers;
layer_cnt = update_pos.input_layer_cnt;
- if (!layer_cnt) {
- pr_err("no async layers to update\n");
+ if ((!layer_cnt) || (layer_cnt > MAX_LAYER_COUNT)) {
+ pr_err("invalid async layers :%d to update\n", layer_cnt);
return -EINVAL;
}
diff --git a/drivers/video/msm/mdss/mdss_fb.h b/drivers/video/msm/mdss/mdss_fb.h
index 9bb8b40..f4825e3 100644
--- a/drivers/video/msm/mdss/mdss_fb.h
+++ b/drivers/video/msm/mdss/mdss_fb.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2008-2015, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2008-2016, 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
@@ -56,7 +56,6 @@
#define MDP_PP_AD_BL_LINEAR 0x0
#define MDP_PP_AD_BL_LINEAR_INV 0x1
-#define MAX_LAYER_COUNT 0xC
/**
* enum mdp_notify_event - Different frame events to indicate frame update state
diff --git a/drivers/video/msm/mdss/mdss_mdp.h b/drivers/video/msm/mdss/mdss_mdp.h
index b2083c5..40ec88c 100644
--- a/drivers/video/msm/mdss/mdss_mdp.h
+++ b/drivers/video/msm/mdss/mdss_mdp.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2012-2016, 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
@@ -83,6 +83,8 @@
#define XIN_HALT_TIMEOUT_US 0x4000
+#define MAX_LAYER_COUNT 0xC
+
/* hw cursor can only be setup in highest mixer stage */
#define HW_CURSOR_STAGE(mdata) \
(((mdata)->max_target_zorder + MDSS_MDP_STAGE_0) - 1)
diff --git a/drivers/video/msm/mdss/mdss_rotator.c b/drivers/video/msm/mdss/mdss_rotator.c
index 86e3665..e3c46fc 100644
--- a/drivers/video/msm/mdss/mdss_rotator.c
+++ b/drivers/video/msm/mdss/mdss_rotator.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2014-2016, 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
@@ -2129,6 +2129,7 @@ static int mdss_rotator_handle_request(struct mdss_rot_mgr *mgr,
struct mdp_rotation_item *items = NULL;
struct mdss_rot_entry_container *req = NULL;
int size, ret;
+ uint32_t req_count;
ret = copy_from_user(&user_req, (void __user *)arg,
sizeof(user_req));
@@ -2137,12 +2138,18 @@ static int mdss_rotator_handle_request(struct mdss_rot_mgr *mgr,
return ret;
}
+ req_count = user_req.count;
+ if ((!req_count) || (req_count > MAX_LAYER_COUNT)) {
+ pr_err("invalid rotator req count :%d\n", req_count);
+ return -EINVAL;
+ }
+
/*
* here, we make a copy of the items so that we can copy
* all the output fences to the client in one call. Otherwise,
* we will have to call multiple copy_to_user
*/
- size = sizeof(struct mdp_rotation_item) * user_req.count;
+ size = sizeof(struct mdp_rotation_item) * req_count;
items = devm_kzalloc(&mgr->pdev->dev, size, GFP_KERNEL);
if (!items) {
pr_err("fail to allocate rotation items\n");
@@ -2281,6 +2288,7 @@ static int mdss_rotator_handle_request32(struct mdss_rot_mgr *mgr,
struct mdp_rotation_item *items = NULL;
struct mdss_rot_entry_container *req = NULL;
int size, ret;
+ uint32_t req_count;
ret = copy_from_user(&user_req32, (void __user *)arg,
sizeof(user_req32));
@@ -2289,7 +2297,13 @@ static int mdss_rotator_handle_request32(struct mdss_rot_mgr *mgr,
return ret;
}
- size = sizeof(struct mdp_rotation_item) * user_req32.count;
+ req_count = user_req32.count;
+ if ((!req_count) || (req_count > MAX_LAYER_COUNT)) {
+ pr_err("invalid rotator req count :%d\n", req_count);
+ return -EINVAL;
+ }
+
+ size = sizeof(struct mdp_rotation_item) * req_count;
items = devm_kzalloc(&mgr->pdev->dev, size, GFP_KERNEL);
if (!items) {
pr_err("fail to allocate rotation items\n");
--
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