Commit 2b31594a authored by Jonghwan Choi's avatar Jonghwan Choi Committed by Greg Kroah-Hartman
Browse files

driver-core: Fix possible null reference in subsys_interface_unregister 



Check if the sif is not NULL before de-referencing it

Signed-off-by: default avatarJonghwan Choi <jhbird.choi@samsung.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent c56d8a73

drivers/base/bus.c

+4 −2
Original line number Diff line number Diff line
@@ -1193,13 +1193,15 @@ EXPORT_SYMBOL_GPL(subsys_interface_register); 


void subsys_interface_unregister(struct subsys_interface *sif)

{

	struct bus_type *subsys = sif->subsys;

	struct bus_type *subsys;

	struct subsys_dev_iter iter;

	struct device *dev;



	if (!sif)

	if (!sif || !sif->subsys)

		return;



	subsys = sif->subsys;



	mutex_lock(&subsys->p->mutex);

	list_del_init(&sif->node);

	if (sif->remove_dev) {