From: Arnd Bergmann <arnd@kernel.org>
To: Cheng-Yi Chiang <cychiang@chromium.org>,
Liam Girdwood <lgirdwood@gmail.com>,
Mark Brown <broonie@kernel.org>, Jaroslav Kysela <perex@perex.cz>,
Takashi Iwai <tiwai@suse.com>, Benson Leung <bleung@chromium.org>,
Enric Balletbo i Serra <enric.balletbo@collabora.com>,
Tzung-Bi Shih <tzungbi@google.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
Guenter Roeck <groeck@chromium.org>,
alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org
Subject: [PATCH] ASoC: cros_ec_codec: fix uninitialized memory read
Date: Thu, 3 Dec 2020 23:54:41 +0100 [thread overview]
Message-ID: <20201203225458.1477830-1-arnd@kernel.org> (raw)
From: Arnd Bergmann <arnd@arndb.de>
gcc points out a memory area that is copied to a device
but not initialized:
sound/soc/codecs/cros_ec_codec.c: In function 'i2s_rx_event':
arch/x86/include/asm/string_32.h:83:20: error: '*((void *)&p+4)' may be used uninitialized in this function [-Werror=maybe-uninitialized]
83 | *((int *)to + 1) = *((int *)from + 1);
Initialize all the unused fields to zero.
Fixes: 727f1c71c780 ("ASoC: cros_ec_codec: refactor I2S RX")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
sound/soc/codecs/cros_ec_codec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/soc/codecs/cros_ec_codec.c b/sound/soc/codecs/cros_ec_codec.c
index 58894bf47514..f33a2a9654e7 100644
--- a/sound/soc/codecs/cros_ec_codec.c
+++ b/sound/soc/codecs/cros_ec_codec.c
@@ -332,7 +332,7 @@ static int i2s_rx_event(struct snd_soc_dapm_widget *w,
snd_soc_dapm_to_component(w->dapm);
struct cros_ec_codec_priv *priv =
snd_soc_component_get_drvdata(component);
- struct ec_param_ec_codec_i2s_rx p;
+ struct ec_param_ec_codec_i2s_rx p = {};
switch (event) {
case SND_SOC_DAPM_PRE_PMU:
--
2.27.0
next reply other threads:[~2020-12-03 22:56 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-03 22:54 Arnd Bergmann [this message]
2020-12-04 2:56 ` [PATCH] ASoC: cros_ec_codec: fix uninitialized memory read Tzung-Bi Shih
2020-12-04 8:28 ` Arnd Bergmann
2020-12-04 9:05 ` Tzung-Bi Shih
2020-12-04 23:30 ` Mark Brown
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