It looks like mac80211 may try to send unicast frames to a STA that
does not have a STA entry. We need to make sure that that is caught in
the rate control code before dereferencing STA data.
Signed-off-by: Jouni Malinen <jouni.malinen@xxxxxxxxxxx>
---
drivers/net/wireless/ath9k/rc.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- wireless-testing.orig/drivers/net/wireless/ath9k/rc.c 2008-12-17 12:37:50.000000000 +0200
+++ wireless-testing/drivers/net/wireless/ath9k/rc.c 2008-12-17 13:00:38.000000000 +0200
@@ -1498,7 +1498,8 @@ static void ath_get_rate(void *priv, str
__le16 fc = hdr->frame_control;
/* lowest rate for management and multicast/broadcast frames */
- if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1)) {
+ if (!ieee80211_is_data(fc) || is_multicast_ether_addr(hdr->addr1) ||
+ !sta) {
tx_info->control.rates[0].idx = rate_lowest_index(sband, sta);
tx_info->control.rates[0].count =
is_multicast_ether_addr(hdr->addr1) ? 1 : ATH_MGT_TXMAXTRY;
--
Jouni Malinen PGP id EFC895FA
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