linux-kernel - [PATCH] acpi: check for null return of devm_kzalloc in fch_misc

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Message-Id: <20230226055427.2512453-1-void0red@gmail.com>
Date:   Sun, 26 Feb 2023 13:54:27 +0800
From:   Kang Chen <void0red@...il.com>
To:     lenb@...nel.org
Cc:     rafael@...nel.org, linux-acpi@...r.kernel.org,
        linux-kernel@...r.kernel.org, Kang Chen <void0red@...il.com>
Subject: [PATCH] acpi: check for null return of devm_kzalloc in fch_misc_setup

devm_kzalloc may fail, clk_data->name might be null and will
cause illegal address access later.

Signed-off-by: Kang Chen <void0red@...il.com>
---
 drivers/acpi/acpi_apd.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/acpi/acpi_apd.c b/drivers/acpi/acpi_apd.c
index 3bbe2276c..80f945cbe 100644
--- a/drivers/acpi/acpi_apd.c
+++ b/drivers/acpi/acpi_apd.c
@@ -83,6 +83,8 @@ static int fch_misc_setup(struct apd_private_data *pdata)
 	if (!acpi_dev_get_property(adev, "clk-name", ACPI_TYPE_STRING, &obj)) {
 		clk_data->name = devm_kzalloc(&adev->dev, obj->string.length,
 					      GFP_KERNEL);
+		if (!clk_data->name)
+			return -ENOMEM;
 
 		strcpy(clk_data->name, obj->string.pointer);
 	} else {
-- 
2.34.1