driver core: Prevent reference to freed memory on error path

priv is drv->p. So only free drv->p after we've finished using priv.

Found using a static code analysis tool

Signed-off-by: Phil Carmody <ext-phil.2.carmody@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 63c143e..c0c5a43 100644 (file)
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -703,9 +703,9 @@ int bus_add_driver(struct device_driver *drv)
        return 0;
 
 out_unregister:
+       kobject_put(&priv->kobj);
        kfree(drv->p);
        drv->p = NULL;
-       kobject_put(&priv->kobj);
 out_put_bus:
        bus_put(bus);
        return error;