The patch
ASoC: rt274: Variable "buf" in function rt274_jack_detect() could be uninitialized
has been applied to the asoc tree at
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying to this mail.
Thanks, Mark
From 4a8191aa9e057ea38279ef9e809265ba3966be40 Mon Sep 17 00:00:00 2001
From: Yizhuo yzhai003@ucr.edu 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 yzhai003@ucr.edu Signed-off-by: Mark Brown broonie@kernel.org --- 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);