diff options
| author | Jérôme Pouiller <jerome.pouiller@silabs.com> | 2020-01-15 13:55:10 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-16 20:59:51 +0100 |
| commit | 76b5c2ce468fc7fa5f4daf727bbefa6f8a2d7a02 (patch) | |
| tree | 6ff639a883862d9ebe52abe59e0cf116fb2515f9 /drivers | |
| parent | 7d2d2bfdeb82c383f5cd8b93b1c234249c1a588c (diff) | |
staging: wfx: fix bss_loss
wfx_tx_confirm_cb() retrieves the station associated with a frame using
the MAC address from the 802.11 header. In the other side wfx_tx()
retrieves the station using sta field from the ieee80211_tx_control
argument.
In wfx_cqm_bssloss_sm(), wfx_tx() was called directly without valid sta
field, but with a valid MAC address in 802.11 header. So there the
processing of this packet was unbalanced and may produce weird bugs.
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20200115135338.14374-48-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/staging/wfx/sta.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/staging/wfx/sta.c b/drivers/staging/wfx/sta.c index aebce96dcd4a..1c10ebd11944 100644 --- a/drivers/staging/wfx/sta.c +++ b/drivers/staging/wfx/sta.c @@ -88,19 +88,25 @@ void wfx_cqm_bssloss_sm(struct wfx_vif *wvif, int init, int good, int bad) // FIXME: call ieee80211_beacon_loss/ieee80211_connection_loss instead if (tx) { struct sk_buff *skb; + struct ieee80211_hdr *hdr; + struct ieee80211_tx_control control = { }; wvif->bss_loss_state++; skb = ieee80211_nullfunc_get(wvif->wdev->hw, wvif->vif, false); if (!skb) goto end; + hdr = (struct ieee80211_hdr *)skb->data; memset(IEEE80211_SKB_CB(skb), 0, sizeof(*IEEE80211_SKB_CB(skb))); IEEE80211_SKB_CB(skb)->control.vif = wvif->vif; IEEE80211_SKB_CB(skb)->driver_rates[0].idx = 0; IEEE80211_SKB_CB(skb)->driver_rates[0].count = 1; IEEE80211_SKB_CB(skb)->driver_rates[1].idx = -1; - wfx_tx(wvif->wdev->hw, NULL, skb); + rcu_read_lock(); // protect control.sta + control.sta = ieee80211_find_sta(wvif->vif, hdr->addr1); + wfx_tx(wvif->wdev->hw, &control, skb); + rcu_read_unlock(); } end: mutex_unlock(&wvif->bss_loss_lock); |