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msm: thermal: Add range checking for cluster_id 

The cluster id flag is passed in from the userspace through ioctl
interface. Ensure correctness of cluster id to avoid out of bounds array
accesses.

CRS-fixed: 977508
Change-Id: I778b962d347b90488b983a15087b13e90ad06688
Signed-off-by: Mahesh Sivasubramanian <msivasub@codeaurora.org>
This commit is contained in:
Mahesh Sivasubramanian 2016-02-17 14:36:32 -07:00 committed by Gerrit - the friendly Code Review server
parent 186fb6e30c
commit e58a9c878a
1 changed files with 7 additions and 1 deletions
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8
drivers/thermal/msm_thermal-dev.c
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@ -1,4 +1,4 @@
/* Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
/* Copyright (c) 2013-2016, 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
@ -114,6 +114,9 @@ static long msm_thermal_process_freq_table_req(struct msm_thermal_ioctl *query,
uint32_t table_idx, idx = 0, cluster_id = query->clock_freq.cluster_num;
struct clock_plan_arg *clock_freq = &(query->clock_freq);
if (cluster_id >= num_possible_cpus())
return -EINVAL;
if (!freq_table_len[cluster_id]) {
ret = msm_thermal_get_freq_plan_size(cluster_id,
&freq_table_len[cluster_id]);
@ -200,6 +203,9 @@ static long msm_thermal_process_voltage_table_req(
uint32_t cluster_id = query->voltage.cluster_num;
struct voltage_plan_arg *voltage = &(query->voltage);
if (cluster_id >= num_possible_cpus())
return -EINVAL;
if (!voltage_table_ptr[cluster_id]) {
if (!freq_table_len[cluster_id]) {
ret = msm_thermal_get_freq_plan_size(cluster_id,