linux-kernel - [PATCH] ASoc: PCM6240: Fix a null pointer dereference in pcmdevice_i2c

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Date: Fri, 14 Jun 2024 10:41:16 +0800
From: Hao Ge <hao.ge@...ux.dev>
To: lgirdwood@...il.com,
	broonie@...nel.org,
	perex@...ex.cz,
	tiwai@...e.com
Cc: shenghao-ding@...com,
	colin.i.king@...il.com,
	linux-sound@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Hao Ge <gehao@...inos.cn>
Subject: [PATCH] ASoc: PCM6240: Fix a null pointer dereference in pcmdevice_i2c_probe

From: Hao Ge <gehao@...inos.cn>

When devm_kzalloc return NULL,we return -ENOMEM directly to
avoid a null pointer that call pcmdevice_remove which will
perform some operations on the members of the pcm_dev;

Fixes: 1324eafd37aa ("ASoc: PCM6240: Create PCM6240 Family driver code")
Signed-off-by: Hao Ge <gehao@...inos.cn>
---
 sound/soc/codecs/pcm6240.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/sound/soc/codecs/pcm6240.c b/sound/soc/codecs/pcm6240.c
index 86e126783a1d..d3adcea457a2 100644
--- a/sound/soc/codecs/pcm6240.c
+++ b/sound/soc/codecs/pcm6240.c
@@ -2088,8 +2088,7 @@ static int pcmdevice_i2c_probe(struct i2c_client *i2c)
 
 	pcm_dev = devm_kzalloc(&i2c->dev, sizeof(*pcm_dev), GFP_KERNEL);
 	if (!pcm_dev) {
-		ret = -ENOMEM;
-		goto out;
+		return -ENOMEM;
 	}
 
 	pcm_dev->chip_id = (id != NULL) ? id->driver_data : 0;
-- 
2.25.1