ASoC: rt5514-spi: Fix potential NULL pointer dereference

commit 060d0bf491874daece47053c4e1fb0489eb867d2 upstream.

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>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/sound/soc/codecs/rt5514-spi.c b/sound/soc/codecs/rt5514-spi.c
index 12f2ecf..662afc5 100644 (file)
--- a/sound/soc/codecs/rt5514-spi.c
+++ b/sound/soc/codecs/rt5514-spi.c
@@ -265,6 +265,8 @@ static int rt5514_spi_pcm_probe(struct snd_soc_platform *platform)
 
        rt5514_dsp = devm_kzalloc(platform->dev, sizeof(*rt5514_dsp),
                        GFP_KERNEL);
+       if (!rt5514_dsp)
+               return -ENOMEM;
 
        rt5514_dsp->dev = &rt5514_spi->dev;
        mutex_init(&rt5514_dsp->dma_lock);