linux-kernel - [PATCH] ASoC: qcom: Fix NULL Dereference in asoc_qcom_lpass_cpu_platform

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Message-Id: <20241001002409.11989-1-zichenxie0106@gmail.com>
Date: Mon, 30 Sep 2024 19:24:09 -0500
From: Gax-c <zichenxie0106@...il.com>
To: srinivas.kandagatla@...aro.org,
	lgirdwood@...il.com,
	broonie@...nel.org,
	perex@...ex.cz,
	tiwai@...e.com,
	rohitkr@...eaurora.org
Cc: alsa-devel@...a-project.org,
	linux-arm-msm@...r.kernel.org,
	linux-sound@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	stable@...r.kernel.org,
	Gax-c <zichenxie0106@...il.com>,
	Zijie Zhao <zzjas98@...il.com>,
	Chenyuan Yang <chenyuan0y@...il.com>
Subject: [PATCH] ASoC: qcom: Fix NULL Dereference in asoc_qcom_lpass_cpu_platform_probe()

A devm_kzalloc() in asoc_qcom_lpass_cpu_platform_probe() could possibly return NULL pointer.
NULL Pointer Dereference may be triggerred without addtional check.
Add a NULL check for the returned pointer.

Fixes: b5022a36d28f ("ASoC: qcom: lpass: Use regmap_field for i2sctl and dmactl registers")
Signed-off-by: Zichen Xie <zichenxie0106@...il.com>
Reported-by: Zichen Xie <zichenxie0106@...il.com>
Reported-by: Zijie Zhao <zzjas98@...il.com>
Reported-by: Chenyuan Yang <chenyuan0y@...il.com>
---
 sound/soc/qcom/lpass-cpu.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sound/soc/qcom/lpass-cpu.c b/sound/soc/qcom/lpass-cpu.c
index 5a47f661e0c6..a8e56f47f237 100644
--- a/sound/soc/qcom/lpass-cpu.c
+++ b/sound/soc/qcom/lpass-cpu.c
@@ -1243,6 +1243,9 @@ int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev)
 	drvdata->i2sctl = devm_kzalloc(&pdev->dev, sizeof(struct lpaif_i2sctl),
 					GFP_KERNEL);
 
+	if (!drvdata->i2sctl)
+		return -ENOMEM;
+
 	/* Initialize bitfields for dai I2SCTL register */
 	ret = lpass_cpu_init_i2sctl_bitfields(dev, drvdata->i2sctl,
 						drvdata->lpaif_map);
-- 
2.25.1