From: Xiyu Yang <xiyuyan...@fudan.edu.cn> batadv_v_ogm_process() invokes batadv_hardif_neigh_get(), which returns a reference of the neighbor object to "hardif_neigh" with increased refcount.
When batadv_v_ogm_process() returns, "hardif_neigh" becomes invalid, so the refcount should be decreased to keep refcount balanced. The reference counting issue happens in one exception handling paths of batadv_v_ogm_process(). When batadv_v_ogm_orig_get() fails to get the orig node and returns NULL, the refcnt increased by batadv_hardif_neigh_get() is not decreased, causing a refcnt leak. Fix this issue by jumping to "out" label when batadv_v_ogm_orig_get() fails to get the orig node. Fixes: 9323158ef9f4 ("batman-adv: OGMv2 - implement originators logic") Signed-off-by: Xiyu Yang <xiyuyan...@fudan.edu.cn> Signed-off-by: Xin Tan <tanxin....@gmail.com> Signed-off-by: Sven Eckelmann <s...@narfation.org> Signed-off-by: Simon Wunderlich <s...@simonwunderlich.de> --- net/batman-adv/bat_v_ogm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/batman-adv/bat_v_ogm.c b/net/batman-adv/bat_v_ogm.c index 969466218999..80b87b1f4e3a 100644 --- a/net/batman-adv/bat_v_ogm.c +++ b/net/batman-adv/bat_v_ogm.c @@ -893,7 +893,7 @@ static void batadv_v_ogm_process(const struct sk_buff *skb, int ogm_offset, orig_node = batadv_v_ogm_orig_get(bat_priv, ogm_packet->orig); if (!orig_node) - return; + goto out; neigh_node = batadv_neigh_node_get_or_create(orig_node, if_incoming, ethhdr->h_source); -- 2.20.1