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| author | Xiyu Yang <xiyuyang19@fudan.edu.cn> | 2020-04-20 13:37:20 +0800 |
|---|---|---|
| committer | Simon Wunderlich <sw@simonwunderlich.de> | 2020-04-21 10:08:05 +0200 |
| commit | 6f91a3f7af4186099dd10fa530dd7e0d9c29747d (patch) | |
| tree | 7f76b849948c75ccd7d374b08f9cf61d3fc7b51d /net/batman-adv/bat_v_ogm.c | |
| parent | 6107c5da0fca8b50b4d3215e94d619d38cc4a18c (diff) | |
| download | linux-6f91a3f7af4186099dd10fa530dd7e0d9c29747d.tar.gz linux-6f91a3f7af4186099dd10fa530dd7e0d9c29747d.tar.bz2 linux-6f91a3f7af4186099dd10fa530dd7e0d9c29747d.zip | |
batman-adv: Fix refcnt leak in batadv_v_ogm_process
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 <xiyuyang19@fudan.edu.cn>
Signed-off-by: Xin Tan <tanxin.ctf@gmail.com>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Diffstat (limited to 'net/batman-adv/bat_v_ogm.c')
| -rw-r--r-- | net/batman-adv/bat_v_ogm.c | 2 |
1 files changed, 1 insertions, 1 deletions
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); |