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wifi: mac80211: fix invalid drv_sta_pre_rcu_remove calls for non-uploaded sta 

[ Upstream commit 12b220a617 ]

Avoid potential data corruption issues caused by uninitialized driver
private data structures.

Reported-by: Brian Coverstone <brian@mainsequence.net>
Fixes: 6a9d1b91f3 ("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>
This commit is contained in:
Felix Fietkau 2023-03-24 13:09:24 +01:00 committed by Greg Kroah-Hartman
parent 41b09f7cea
commit 73752a39e2
1 changed files with 2 additions and 1 deletions
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3
net/mac80211/sta_info.c
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@ -1261,7 +1261,8 @@ 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)