mac80211: fix station rate table updates on assoc

commit 18fe0fae61252b5ae6e26553e2676b5fac555951 upstream.

If the driver uses .sta_add, station entries are only uploaded after the sta
is in assoc state. Fix early station rate table updates by deferring them
until the sta has been uploaded.

Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20210201083324.3134-1-nbd@nbd.name
[use rcu_access_pointer() instead since we won't dereference here]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/mac80211/driver-ops.c b/net/mac80211/driver-ops.c
index c9a8a24..48322e4 100644 (file)
--- a/net/mac80211/driver-ops.c
+++ b/net/mac80211/driver-ops.c
@@ -125,8 +125,11 @@ int drv_sta_state(struct ieee80211_local *local,
        } else if (old_state == IEEE80211_STA_AUTH &&
                   new_state == IEEE80211_STA_ASSOC) {
                ret = drv_sta_add(local, sdata, &sta->sta);
-               if (ret == 0)
+               if (ret == 0) {
                        sta->uploaded = true;
+                       if (rcu_access_pointer(sta->sta.rates))
+                               drv_sta_rate_tbl_update(local, sdata, &sta->sta);
+               }
        } else if (old_state == IEEE80211_STA_ASSOC &&
                   new_state == IEEE80211_STA_AUTH) {
                drv_sta_remove(local, sdata, &sta->sta);

diff --git a/net/mac80211/rate.c b/net/mac80211/rate.c
index 4592720..63652c3 100644 (file)
--- a/net/mac80211/rate.c
+++ b/net/mac80211/rate.c
@@ -960,7 +960,8 @@ int rate_control_set_rates(struct ieee80211_hw *hw,
        if (old)
                kfree_rcu(old, rcu_head);
 
-       drv_sta_rate_tbl_update(hw_to_local(hw), sta->sdata, pubsta);
+       if (sta->uploaded)
+               drv_sta_rate_tbl_update(hw_to_local(hw), sta->sdata, pubsta);
 
        ieee80211_sta_set_expected_throughput(pubsta, sta_get_expected_throughput(sta));