diff options
| author | Sven Eckelmann <sven@narfation.org> | 2016-07-15 17:39:29 +0200 |
|---|---|---|
| committer | Simon Wunderlich <sw@simonwunderlich.de> | 2016-08-09 07:54:50 +0200 |
| commit | df28ca6bb3282a4c8dc5b65f60b0136fc190ee52 (patch) | |
| tree | 4d9b1b0173ac642fab228511635881e51f4263e6 /net | |
| parent | b2367e46fa0d50fd784be3ec0a5c370bf2f2b61a (diff) | |
batman-adv: Place kref_get for softif_vlan near use
It is hard to understand why the refcnt is increased when it isn't done
near the actual place the new reference is used. So using kref_get right
before the place which requires the reference and in the same function
helps to avoid accidental problems caused by incorrect reference counting.
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Diffstat (limited to 'net')
| -rw-r--r-- | net/batman-adv/soft-interface.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c index e508bf5957b3..49e16b6e0ba3 100644 --- a/net/batman-adv/soft-interface.c +++ b/net/batman-adv/soft-interface.c @@ -594,6 +594,7 @@ int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid) } spin_lock_bh(&bat_priv->softif_vlan_list_lock); + kref_get(&vlan->refcount); hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list); spin_unlock_bh(&bat_priv->softif_vlan_list_lock); @@ -604,6 +605,9 @@ int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid) bat_priv->soft_iface->dev_addr, vid, BATADV_NULL_IFINDEX, BATADV_NO_MARK); + /* don't return reference to new softif_vlan */ + batadv_softif_vlan_put(vlan); + return 0; } |