linux-kernel - [PATCH AUTOSEL 6.6 01/15] soc: qcom: Add check devm

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Message-ID: <20241112103643.1653381-1-sashal@kernel.org>
Date: Tue, 12 Nov 2024 05:36:22 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Charles Han <hanchunchao@...pur.com>,
	Bjorn Andersson <andersson@...nel.org>,
	Sasha Levin <sashal@...nel.org>,
	konradybcio@...nel.org,
	linux-arm-msm@...r.kernel.org
Subject: [PATCH AUTOSEL 6.6 01/15] soc: qcom: Add check devm_kasprintf() returned value

From: Charles Han <hanchunchao@...pur.com>

[ Upstream commit e694d2b5c58ba2d1e995d068707c8d966e7f5f2a ]

devm_kasprintf() can return a NULL pointer on failure but this
returned value in qcom_socinfo_probe() is not checked.

Signed-off-by: Charles Han <hanchunchao@...pur.com>
Link: https://lore.kernel.org/r/20240929072349.202520-1-hanchunchao@inspur.com
Signed-off-by: Bjorn Andersson <andersson@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/soc/qcom/socinfo.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/qcom/socinfo.c b/drivers/soc/qcom/socinfo.c
index 880b41a57da01..f979ef420354f 100644
--- a/drivers/soc/qcom/socinfo.c
+++ b/drivers/soc/qcom/socinfo.c
@@ -757,10 +757,16 @@ static int qcom_socinfo_probe(struct platform_device *pdev)
 	qs->attr.revision = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%u.%u",
 					   SOCINFO_MAJOR(le32_to_cpu(info->ver)),
 					   SOCINFO_MINOR(le32_to_cpu(info->ver)));
-	if (offsetof(struct socinfo, serial_num) <= item_size)
+	if (!qs->attr.soc_id || qs->attr.revision)
+		return -ENOMEM;
+
+	if (offsetof(struct socinfo, serial_num) <= item_size) {
 		qs->attr.serial_number = devm_kasprintf(&pdev->dev, GFP_KERNEL,
 							"%u",
 							le32_to_cpu(info->serial_num));
+		if (!qs->attr.serial_number)
+			return -ENOMEM;
+	}
 
 	qs->soc_dev = soc_device_register(&qs->attr);
 	if (IS_ERR(qs->soc_dev))
-- 
2.43.0