From: Felix Fietkau <nbd@xxxxxxxx>
[ Upstream commit 12b220a6171faf10638ab683a975cadcf1a352d6 ]
Avoid potential data corruption issues caused by uninitialized driver
private data structures.
Reported-by: Brian Coverstone <brian@xxxxxxxxxxxxxxxx>
Fixes: 6a9d1b91f34d ("mac80211: add pre-RCU-sync sta removal driver operation")
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Link: https://lore.kernel.org/r/20230324120924.38412-3-nbd@xxxxxxxx
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
net/mac80211/sta_info.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index 0d5265adf5396..4e406cd115738 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -942,7 +942,8 @@ static int __must_check __sta_info_destroy_part1(struct sta_info *sta)
list_del_rcu(&sta->list);
sta->removed = true;
- drv_sta_pre_rcu_remove(local, sta->sdata, sta);
+ if (sta->uploaded)
+ drv_sta_pre_rcu_remove(local, sta->sdata, sta);
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
rcu_access_pointer(sdata->u.vlan.sta) == sta)
--
2.39.2
