[PATCH 4.14 092/496] mac80211: fix a possible leak of station stats

From: Greg Kroah-Hartman
Date: Mon May 28 2018 - 09:37:55 EST


4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Sara Sharon <sara.sharon@xxxxxxxxx>

[ Upstream commit d78d9ee9d40aca4781d2c5334972544601a4c3a2 ]

If sta_info_alloc fails after allocating the per CPU statistics,
they are not properly freed.

Fixes: c9c5962b56c1 ("mac80211: enable collecting station statistics per-CPU")
Signed-off-by: Sara Sharon <sara.sharon@xxxxxxxxx>
Signed-off-by: Luca Coelho <luciano.coelho@xxxxxxxxx>
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/mac80211/sta_info.c | 1 +
1 file changed, 1 insertion(+)

--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -439,6 +439,7 @@ free_txq:
if (sta->sta.txq[0])
kfree(to_txq_info(sta->sta.txq[0]));
free:
+ free_percpu(sta->pcpu_rx_stats);
#ifdef CONFIG_MAC80211_MESH
kfree(sta->mesh);
#endif