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ASoC: rt274: Variable "buf" in function rt274_jack_detect() could be uninitialized

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In function rt274_jack_detect(), local variable "buf" could
be uninitialized if function regmap_read() returns -EINVAL.
However, it will be used to calculate "hp" and "mic" and
make their value unpredictable while those value are used
in the caller. This is potentially unsafe.

Signed-off-by: Yizhuo <yzhai003@ucr.edu>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Yizhuo 2019-01-07 12:12:32 -08:00 committed by Mark Brown
parent 7b57085a33
commit 4a8191aa9e
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 9 additions and 2 deletions
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11
sound/soc/codecs/rt274.c
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@ -353,6 +353,7 @@ static void rt274_index_sync(struct snd_soc_component *component)
static int rt274_jack_detect(struct rt274_priv *rt274, bool *hp, bool *mic)
{
unsigned int buf;
int ret;
*hp = false;
*mic = false;
@ -360,9 +361,15 @@ static int rt274_jack_detect(struct rt274_priv *rt274, bool *hp, bool *mic)
if (!rt274->component)
return -EINVAL;
regmap_read(rt274->regmap, RT274_GET_HP_SENSE, &buf);
ret = regmap_read(rt274->regmap, RT274_GET_HP_SENSE, &buf);
if (ret)
return ret;
*hp = buf & 0x80000000;
regmap_read(rt274->regmap, RT274_GET_MIC_SENSE, &buf);
ret = regmap_read(rt274->regmap, RT274_GET_MIC_SENSE, &buf);
if (ret)
return ret;
*mic = buf & 0x80000000;
pr_debug("*hp = %d *mic = %d\n", *hp, *mic);