ACPI: processor: Check for null return of devm_kzalloc() in fch_misc_setup()

[ Upstream commit 4dea41775d951ff1f7b472a346a8ca3ae7e74455 ]

devm_kzalloc() may fail, clk_data->name might be NULL and will
cause a NULL pointer dereference later.

Signed-off-by: Kang Chen <void0red@gmail.com>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/acpi/acpi_apd.c b/drivers/acpi/acpi_apd.c
index 3bbe2276cac7674fbacb83205c6d714f96863243..80f945cbec8a7cf12502400575a02a455594ed10 100644 (file)
--- 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 {