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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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8
asoc/codecs/swr-dmic.c
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@@ -160,7 +160,7 @@ static int swr_dmic_tx_master_port_put(struct snd_kcontrol *kcontrol,
snd_soc_kcontrol_component(kcontrol);
struct swr_dmic_priv *swr_dmic = snd_soc_component_get_drvdata(component);
int ret = 0;
int slave_port_idx;
unsigned int slave_port_idx = SWR_DMIC_MAX_PORTS, idx = 0;
ret = swr_dmic_tx_get_slave_port_type_idx(kcontrol->id.name,
&slave_port_idx);
@@ -169,8 +169,12 @@ static int swr_dmic_tx_master_port_put(struct snd_kcontrol *kcontrol,
return ret;
}
idx = ucontrol->value.enumerated.item[0];
if (idx < 0 || idx >= ARRAY_SIZE(swr_master_channel_map))
return -EINVAL;
swr_dmic->tx_master_port_map[slave_port_idx] =
swr_master_channel_map[ucontrol->value.enumerated.item[0]];
swr_master_channel_map[idx];
dev_dbg(component->dev, "%s: slv port id: %d, master_port_type: %d\n",
__func__, slave_port_idx,
swr_dmic->tx_master_port_map[slave_port_idx]);