diff options
| author | Sven Eckelmann <sven@narfation.org> | 2016-03-05 18:09:21 +0300 |
|---|---|---|
| committer | Antonio Quartulli <a@unstable.cc> | 2016-05-10 13:28:29 +0300 |
| commit | 0de32ceee156787429035c974316f4e5098cf722 (patch) | |
| tree | d978fd69777dec71c9e423fd17d12135e5b37d0a /net/batman-adv | |
| parent | c9dad805e9f4fd3978f22c970bae49eaa00b46dd (diff) | |
| download | linux-0de32ceee156787429035c974316f4e5098cf722.tar.xz | |
batman-adv: Use kref_get for batadv_nc_get_nc_node
batadv_nc_get_nc_node requires that the caller already has a valid
reference for orig_neigh_node. It is therefore not possible that it has an
reference counter of 0 and was still given to this function
The kref_get function instead WARNs (with debug information) when the
reference counter would still be 0. This makes a bug in batman-adv better
visible because kref_get_unless_zero would have ignored this problem.
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
Diffstat (limited to 'net/batman-adv')
| -rw-r--r-- | net/batman-adv/network-coding.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/net/batman-adv/network-coding.c b/net/batman-adv/network-coding.c index 1da8e0e1b18f..953dff1ad43b 100644 --- a/net/batman-adv/network-coding.c +++ b/net/batman-adv/network-coding.c @@ -856,8 +856,7 @@ batadv_nc_get_nc_node(struct batadv_priv *bat_priv, if (!nc_node) return NULL; - if (!kref_get_unless_zero(&orig_neigh_node->refcount)) - goto free; + kref_get(&orig_neigh_node->refcount); /* Initialize nc_node */ INIT_LIST_HEAD(&nc_node->list); @@ -884,10 +883,6 @@ batadv_nc_get_nc_node(struct batadv_priv *bat_priv, spin_unlock_bh(lock); return nc_node; - -free: - kfree(nc_node); - return NULL; } /** |