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From: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
To: Bard Liao <bardliao@realtek.com>,
	Oder Chiou <oder_chiou@realtek.com>,
	Liam Girdwood <lgirdwood@gmail.com>,
	Mark Brown <broonie@kernel.org>, Jaroslav Kysela <perex@perex.cz>,
	Takashi Iwai <tiwai@suse.com>
Cc: alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org,
	"Gustavo A. R. Silva" <gustavo@embeddedor.com>
Subject: [PATCH] ASoC: rt5514-spi: Fix potential NULL pointer dereference
Date: Tue, 15 Jan 2019 11:57:23 -0600	[thread overview]
Message-ID: <20190115175723.GA32176@embeddedor> (raw)

There is a potential NULL pointer dereference in case devm_kzalloc()
fails and returns NULL.

Fix this by adding a NULL check on rt5514_dsp.

This issue was detected with the help of Coccinelle.

Fixes: 6eebf35b0e4a ("ASoC: rt5514: add rt5514 SPI driver")
Cc: stable@vger.kernel.org
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
---
 sound/soc/codecs/rt5514-spi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/codecs/rt5514-spi.c b/sound/soc/codecs/rt5514-spi.c
index 4d46f4567c3a..bec2eefa8b0f 100644
--- a/sound/soc/codecs/rt5514-spi.c
+++ b/sound/soc/codecs/rt5514-spi.c
@@ -280,6 +280,8 @@ static int rt5514_spi_pcm_probe(struct snd_soc_component *component)
 
 	rt5514_dsp = devm_kzalloc(component->dev, sizeof(*rt5514_dsp),
 			GFP_KERNEL);
+	if (!rt5514_dsp)
+		return -ENOMEM;
 
 	rt5514_dsp->dev = &rt5514_spi->dev;
 	mutex_init(&rt5514_dsp->dma_lock);
-- 
2.20.1

             reply	other threads:[~2019-01-15 17:57 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-15 17:57 Gustavo A. R. Silva [this message]
2019-01-15 19:08 ` Applied "ASoC: rt5514-spi: Fix potential NULL pointer dereference" to the asoc tree Mark Brown

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