From 0f9b011d3321ca1079c7a46c18cb1956fbdb7bcb Mon Sep 17 00:00:00 2001 From: Christophe JAILLET Date: Tue, 29 Aug 2017 21:23:49 +0200 Subject: [PATCH] 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 Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/base/bus.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/base/bus.c b/drivers/base/bus.c index e162c9a789ba..22a64fd3309b 100644 --- a/drivers/base/bus.c +++ b/drivers/base/bus.c @@ -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); -- 2.20.1