[PATCH] acpi: Fix use-after-free in acpi_ipmi.c

[Youling Tang]

kfree() has been called inside put_device so anther kfree would cause a
use-after-free bug.

Signed-off-by: Youling Tang <tangyoul...@loongson.cn>
---
 drivers/acpi/acpi_ipmi.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/acpi/acpi_ipmi.c b/drivers/acpi/acpi_ipmi.c
index 9d6c0fc..72902b6 100644
--- a/drivers/acpi/acpi_ipmi.c
+++ b/drivers/acpi/acpi_ipmi.c
@@ -130,7 +130,6 @@ ipmi_dev_alloc(int iface, struct device *dev, acpi_handle 
handle)
                               ipmi_device, &user);
        if (err) {
                put_device(dev);
-               kfree(ipmi_device);
                return NULL;
        }
        ipmi_device->user_interface = user;
@@ -142,7 +141,6 @@ static void ipmi_dev_release(struct acpi_ipmi_device 
*ipmi_device)
 {
        ipmi_destroy_user(ipmi_device->user_interface);
        put_device(ipmi_device->dev);
-       kfree(ipmi_device);
 }
 
 static void ipmi_dev_release_kref(struct kref *kref)
-- 
2.1.0