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driver core: bus: Fix a potential double free

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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>
This commit is contained in:
Christophe JAILLET 2017-08-29 21:23:49 +02:00 committed by Greg Kroah-Hartman
parent 7521621e60
commit 0f9b011d33
1 changed files with 1 additions and 1 deletions
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2
drivers/base/bus.c
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@ -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);