From: Felix Fietkau Date: Mon, 1 Feb 2021 08:33:24 +0000 (+0100) Subject: mac80211: fix station rate table updates on assoc X-Git-Tag: v4.4.257~13 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=70d9dc446be027f1ecb7e17d386cee6067c62d04;p=thirdparty%2Fkernel%2Fstable.git 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 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 Signed-off-by: Greg Kroah-Hartman --- diff --git a/net/mac80211/driver-ops.c b/net/mac80211/driver-ops.c index df2e4e3112177..5d097ae26b70e 100644 --- a/net/mac80211/driver-ops.c +++ b/net/mac80211/driver-ops.c @@ -128,8 +128,11 @@ 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 a4e2f4e67f941..a4d9e9ee06bee 100644 --- a/net/mac80211/rate.c +++ b/net/mac80211/rate.c @@ -888,7 +888,8 @@ 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); return 0; }