From 4a8191aa9e057ea38279ef9e809265ba3966be40 Mon Sep 17 00:00:00 2001 From: Yizhuo Date: Mon, 7 Jan 2019 12:12:32 -0800 Subject: [PATCH] ASoC: rt274: Variable "buf" in function rt274_jack_detect() could be uninitialized 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 Signed-off-by: Mark Brown --- sound/soc/codecs/rt274.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/sound/soc/codecs/rt274.c b/sound/soc/codecs/rt274.c index 9e88f7b25d38..adf59039a3b6 100644 --- a/sound/soc/codecs/rt274.c +++ b/sound/soc/codecs/rt274.c @@ -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);