Bluetooth: 6lowpan: use after free in disconnect_devices()
This was accidentally changed from list_for_each_entry_safe() to
list_for_each_entry() so now it has a use after free bug. I've changed
it back.
Fixes: 90305829635d ('Bluetooth: 6lowpan: Converting rwlocks to use RCU')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/bluetooth/6lowpan.c b/net/bluetooth/6lowpan.c
index 7254bdd..eef298d 100644
--- a/net/bluetooth/6lowpan.c
+++ b/net/bluetooth/6lowpan.c
@@ -1383,7 +1383,7 @@
static void disconnect_devices(void)
{
- struct lowpan_dev *entry, *new_dev;
+ struct lowpan_dev *entry, *tmp, *new_dev;
struct list_head devices;
INIT_LIST_HEAD(&devices);
@@ -1408,7 +1408,7 @@
rcu_read_unlock();
- list_for_each_entry(entry, &devices, list) {
+ list_for_each_entry_safe(entry, tmp, &devices, list) {
ifdown(entry->netdev);
BT_DBG("Unregistering netdev %s %p",
entry->netdev->name, entry->netdev);