[PATCH 1/1] ACPI / processor: Fix potential NULL pointer dereferencein acpi_processor_add()

[Hanjun Guo]

In acpi_processor_add(), get_cpu_device() will return NULL in some cases,
and ACPI_HANDLE_SET() just use the return dev directly, this will case a
potential NULL pointer dereference, fix it.

Signed-off-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx>
---
 drivers/acpi/acpi_processor.c |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c
index 587d2af..4466b36 100644
--- a/drivers/acpi/acpi_processor.c
+++ b/drivers/acpi/acpi_processor.c
@@ -389,6 +389,11 @@ static int __cpuinit acpi_processor_add(struct acpi_device *device,
 	per_cpu(processor_device_array, pr->id) = device;
 
 	dev = get_cpu_device(pr->id);
+	if (!dev) {
+		result = -ENODEV;
+		goto err;
+	}
+
 	ACPI_HANDLE_SET(dev, pr->handle);
 	result = acpi_bind_one(dev, NULL);
 	if (result)
-- 
1.7.9.5


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