diff options
Diffstat (limited to 'net/l3mdev/l3mdev.c')
| -rw-r--r-- | net/l3mdev/l3mdev.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/net/l3mdev/l3mdev.c b/net/l3mdev/l3mdev.c index cfc9fcb97465..f35899d45a9a 100644 --- a/net/l3mdev/l3mdev.c +++ b/net/l3mdev/l3mdev.c @@ -118,6 +118,8 @@ EXPORT_SYMBOL_GPL(l3mdev_fib_table_by_index); * local and multicast addresses * @net: network namespace for device index lookup * @fl6: IPv6 flow struct for lookup + * This function does not hold refcnt on the returned dst. + * Caller must hold rcu_read_lock(). */ struct dst_entry *l3mdev_link_scope_lookup(struct net *net, @@ -126,9 +128,8 @@ struct dst_entry *l3mdev_link_scope_lookup(struct net *net, struct dst_entry *dst = NULL; struct net_device *dev; + WARN_ON_ONCE(!rcu_read_lock_held()); if (fl6->flowi6_oif) { - rcu_read_lock(); - dev = dev_get_by_index_rcu(net, fl6->flowi6_oif); if (dev && netif_is_l3_slave(dev)) dev = netdev_master_upper_dev_get_rcu(dev); @@ -136,8 +137,6 @@ struct dst_entry *l3mdev_link_scope_lookup(struct net *net, if (dev && netif_is_l3_master(dev) && dev->l3mdev_ops->l3mdev_link_scope_lookup) dst = dev->l3mdev_ops->l3mdev_link_scope_lookup(dev, fl6); - - rcu_read_unlock(); } return dst; |