Commit 0f9b011d authored Aug 29, 2017 by Christophe JAILLET Committed by Greg Kroah-Hartman Aug 31, 2017

driver core: bus: Fix a potential double free



The .release function of driver_ktype is 'driver_release()'.
This function frees the container_of this kobject.

So, this memory must not be freed explicitly in the error handling path of
'bus_add_driver()'. Otherwise a double free will occur.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 7521621e

drivers/base/bus.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -698,7 +698,7 @@ int bus_add_driver(struct device_driver *drv)

		out_unregister:
		kobject_put(&priv->kobj);
		kfree(drv->p);
		/* drv->p is freed in driver_release() */
		drv->p = NULL;
		out_put_bus:
		bus_put(bus);