From: Felix Fietkau nbd@nbd.name
[ Upstream commit 12b220a6171faf10638ab683a975cadcf1a352d6 ]
Avoid potential data corruption issues caused by uninitialized driver private data structures.
Reported-by: Brian Coverstone brian@mainsequence.net Fixes: 6a9d1b91f34d ("mac80211: add pre-RCU-sync sta removal driver operation") Signed-off-by: Felix Fietkau nbd@nbd.name Link: https://lore.kernel.org/r/20230324120924.38412-3-nbd@nbd.name Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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 d572478c4d68e..2e84360990f0c 100644 --- a/net/mac80211/sta_info.c +++ b/net/mac80211/sta_info.c @@ -1040,7 +1040,8 @@ 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)