wifi: mac80211: don't flush non-uploaded STAs

If STA state is pre-moved to AUTHORIZED (such as in IBSS
scenarios) and insertion fails, the station is freed.
In this case, the driver never knew about the station,
so trying to flush it is unexpected and may crash.

Check if the sta was uploaded to the driver before and
fix this.

Fixes: d00800a ("wifi: mac80211: add flush_sta method")
Signed-off-by: Johannes Berg <[email protected]>
Signed-off-by: Miri Korenblit <[email protected]>
Link: https://patch.msgid.link/20250102161730.e3d10970a7c7.I491bbcccc46f835ade07df0640a75f6ed92f20a3@changeid
Signed-off-by: Johannes Berg <[email protected]>

Author: jmberg-intel

net/mac80211/driver-ops.h

@@ -724,6 +724,9 @@ static inline void drv_flush_sta(struct ieee80211_local *local,
 	if (sdata && !check_sdata_in_driver(sdata))
 		return;
 
+	if (!sta->uploaded)
+		return;
+
 	trace_drv_flush_sta(local, sdata, &sta->sta);
 	if (local->ops->flush_sta)
 		local->ops->flush_sta(&local->hw, &sdata->vif, &sta->sta);