From: Maxim Altshul Date: Thu, 11 Aug 2016 10:38:16 +0000 (+0300) Subject: mac80211: call get_expected_throughput only after adding station X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=4fdbc67a25ce;p=deliverable%2Flinux.git mac80211: call get_expected_throughput only after adding station Depending on which method the driver implements, userspace could call this (indirectly, by getting station info) before the driver knows about the station, possibly causing it to misbehave. Therefore, add a check for sta->uploaded which indicates that the driver knows about the station. Signed-off-by: Maxim Altshul [reword commit message] Signed-off-by: Johannes Berg --- diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h index ba5fc1f01e53..42a41ae405ba 100644 --- a/net/mac80211/driver-ops.h +++ b/net/mac80211/driver-ops.h @@ -1088,13 +1088,13 @@ static inline void drv_leave_ibss(struct ieee80211_local *local, } static inline u32 drv_get_expected_throughput(struct ieee80211_local *local, - struct ieee80211_sta *sta) + struct sta_info *sta) { u32 ret = 0; - trace_drv_get_expected_throughput(sta); - if (local->ops->get_expected_throughput) - ret = local->ops->get_expected_throughput(&local->hw, sta); + trace_drv_get_expected_throughput(&sta->sta); + if (local->ops->get_expected_throughput && sta->uploaded) + ret = local->ops->get_expected_throughput(&local->hw, &sta->sta); trace_drv_return_u32(local, ret); return ret; diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c index d1cba819e19a..19f14c907d74 100644 --- a/net/mac80211/sta_info.c +++ b/net/mac80211/sta_info.c @@ -2301,7 +2301,7 @@ u32 sta_get_expected_throughput(struct sta_info *sta) if (ref && ref->ops->get_expected_throughput) thr = ref->ops->get_expected_throughput(sta->rate_ctrl_priv); else - thr = drv_get_expected_throughput(local, &sta->sta); + thr = drv_get_expected_throughput(local, sta); return thr; }