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asoc: codec: add range check to avoid overflow

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Add range check for ucontrol value to avoid array
overflow.

Change-Id: I7b699519bec6f605e5ca5ece8f67badbefc7a094
Signed-off-by: Vatsal Bucha <vbucha@codeaurora.org>
This commit is contained in:
Vatsal Bucha
2021-03-08 16:02:28 +05:30
committed by Gerrit - the friendly Code Review server
parent 2f7a802e67
commit 77ac79f6c7
3 changed files with 47 additions and 19 deletions
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47
asoc/codecs/wcd937x/wcd937x.c
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@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
* Copyright (c) 2018-2021, The Linux Foundation. All rights reserved.
*/
#include <linux/module.h>
@@ -2120,15 +2120,24 @@ static int wcd937x_tx_master_ch_get(struct snd_kcontrol *kcontrol,
{
struct snd_soc_component *component =
snd_soc_kcontrol_component(kcontrol);
struct wcd937x_priv *wcd937x = snd_soc_component_get_drvdata(component);
int slave_ch_idx;
struct wcd937x_priv *wcd937x = NULL;
int slave_ch_idx = -EINVAL;
if (component == NULL)
return -EINVAL;
wcd937x = snd_soc_component_get_drvdata(component);
if (wcd937x == NULL)
return -EINVAL;
wcd937x_tx_get_slave_ch_type_idx(kcontrol->id.name, &slave_ch_idx);
if (slave_ch_idx != -EINVAL)
ucontrol->value.integer.value[0] =
wcd937x_slave_get_master_ch_val(
wcd937x->tx_master_ch_map[slave_ch_idx]);
if (slave_ch_idx < 0 || slave_ch_idx >= WCD937X_MAX_SLAVE_CH_TYPES)
return -EINVAL;
ucontrol->value.integer.value[0] =
wcd937x_slave_get_master_ch_val(
wcd937x->tx_master_ch_map[slave_ch_idx]);
dev_dbg(component->dev, "%s: ucontrol->value.integer.value[0] = %ld\n",
__func__, ucontrol->value.integer.value[0]);
@@ -2140,19 +2149,31 @@ static int wcd937x_tx_master_ch_put(struct snd_kcontrol *kcontrol,
{
struct snd_soc_component *component =
snd_soc_kcontrol_component(kcontrol);
struct wcd937x_priv *wcd937x = snd_soc_component_get_drvdata(component);
int slave_ch_idx;
struct wcd937x_priv *wcd937x;
int slave_ch_idx = -EINVAL, idx = 0;
if (component == NULL)
return -EINVAL;
wcd937x = snd_soc_component_get_drvdata(component);
if (wcd937x == NULL)
return -EINVAL;
wcd937x_tx_get_slave_ch_type_idx(kcontrol->id.name, &slave_ch_idx);
if (slave_ch_idx < 0 || slave_ch_idx >= WCD937X_MAX_SLAVE_CH_TYPES)
return -EINVAL;
dev_dbg(component->dev, "%s: slave_ch_idx: %d", __func__, slave_ch_idx);
dev_dbg(component->dev, "%s: ucontrol->value.enumerated.item[0] = %ld\n",
__func__, ucontrol->value.enumerated.item[0]);
if (slave_ch_idx != -EINVAL)
wcd937x->tx_master_ch_map[slave_ch_idx] =
wcd937x_slave_get_master_ch(
ucontrol->value.enumerated.item[0]);
idx = ucontrol->value.enumerated.item[0];
if (idx < 0 || idx >= ARRAY_SIZE(wcd937x_swr_master_ch_map))
return -EINVAL;
wcd937x->tx_master_ch_map[slave_ch_idx] =
wcd937x_slave_get_master_ch(idx);
return 0;
}