Commit aec9db35 authored by Dan Carpenter's avatar Dan Carpenter Committed by David S. Miller
Browse files

6LoWPAN: use the _safe version of list_for_each 



When we kfree(entry) that causes a use-after-free bug so we have to
use list_for_each_entry_safe() safe here.

Signed-off-by: default avatarDan Carpenter <error27@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 90d0963d

net/ieee802154/6lowpan.c

+3 −1
Original line number Diff line number Diff line
@@ -813,15 +813,17 @@ static void lowpan_dellink(struct net_device *dev, struct list_head *head) 
	struct lowpan_dev_info *lowpan_dev = lowpan_dev_info(dev);

	struct net_device *real_dev = lowpan_dev->real_dev;

	struct lowpan_dev_record *entry;

	struct lowpan_dev_record *tmp;



	ASSERT_RTNL();



	mutex_lock(&lowpan_dev_info(dev)->dev_list_mtx);

	list_for_each_entry(entry, &lowpan_devices, list)

	list_for_each_entry_safe(entry, tmp, &lowpan_devices, list) {

		if (entry->ldev == dev) {

			list_del(&entry->list);

			kfree(entry);

		}

	}

	mutex_unlock(&lowpan_dev_info(dev)->dev_list_mtx);



	mutex_destroy(&lowpan_dev_info(dev)->dev_list_mtx);