linux-kernel - [PATCH][next] ASoC: amd: fix memory leak of i2s

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Date:   Wed, 14 Nov 2018 21:31:48 +0000
From:   Colin King <colin.king@...onical.com>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Maruthi Bayyavarapu <maruthi.bayyavarapu@....com>,
        Vijendar Mukunda <Vijendar.Mukunda@....com>,
        alsa-devel@...a-project.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][next] ASoC: amd: fix memory leak of i2s_data on error return

From: Colin Ian King <colin.king@...onical.com>

Currently when snd_pcm_hw_constraint_integer fails there is
a memory leak of i2s_data on the error return path. Fix this by
kfree'ing i2s_data before returning.

Detected by CoverityScan, CID#1475479 ("Resource leak")

Fixes: 0b87d6bcd648 ("ASoC: amd: add acp3x pcm driver dma ops")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 sound/soc/amd/raven/acp3x-pcm-dma.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/soc/amd/raven/acp3x-pcm-dma.c b/sound/soc/amd/raven/acp3x-pcm-dma.c
index 2e61cef00f41..b16cdd187139 100644
--- a/sound/soc/amd/raven/acp3x-pcm-dma.c
+++ b/sound/soc/amd/raven/acp3x-pcm-dma.c
@@ -309,6 +309,7 @@ static int acp3x_dma_open(struct snd_pcm_substream *substream)
 					    SNDRV_PCM_HW_PARAM_PERIODS);
 	if (ret < 0) {
 		dev_err(component->dev, "set integer constraint failed\n");
+		kfree(i2s_data);
 		return ret;
 	}
 
-- 
2.19.1