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authorMathy Vanhoef <vanhoefm@gmail.com>2013-11-28 12:21:45 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-01-08 09:42:11 -0800
commit7110adb76087508116e4ce1496b8ca7a57e2d85d (patch)
tree7caec38dcfb38e3adf508c6f7b8471c7e1630177
parent07632d5ce9517f0b75e4b0dbd56040072fe8bf06 (diff)
downloadlinux-linaro-stable-7110adb76087508116e4ce1496b8ca7a57e2d85d.tar.gz
ath9k_htc: properly set MAC address and BSSID mask
commit 657eb17d87852c42b55c4b06d5425baa08b2ddb3 upstream. Pick the MAC address of the first virtual interface as the new hardware MAC address. Set BSSID mask according to this MAC address. This fixes CVE-2013-4579. Signed-off-by: Mathy Vanhoef <vanhoefm@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/net/wireless/ath/ath9k/htc_drv_main.c25
-rw-r--r--drivers/net/wireless/ath/ath9k/main.c5
2 files changed, 20 insertions, 10 deletions
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_main.c b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
index abbd6effd60d..204619e29a17 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_main.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
@@ -139,21 +139,26 @@ static void ath9k_htc_bssid_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
struct ath9k_vif_iter_data *iter_data = data;
int i;
- for (i = 0; i < ETH_ALEN; i++)
- iter_data->mask[i] &= ~(iter_data->hw_macaddr[i] ^ mac[i]);
+ if (iter_data->hw_macaddr != NULL) {
+ for (i = 0; i < ETH_ALEN; i++)
+ iter_data->mask[i] &= ~(iter_data->hw_macaddr[i] ^ mac[i]);
+ } else {
+ iter_data->hw_macaddr = mac;
+ }
}
-static void ath9k_htc_set_bssid_mask(struct ath9k_htc_priv *priv,
+static void ath9k_htc_set_mac_bssid_mask(struct ath9k_htc_priv *priv,
struct ieee80211_vif *vif)
{
struct ath_common *common = ath9k_hw_common(priv->ah);
struct ath9k_vif_iter_data iter_data;
/*
- * Use the hardware MAC address as reference, the hardware uses it
- * together with the BSSID mask when matching addresses.
+ * Pick the MAC address of the first interface as the new hardware
+ * MAC address. The hardware will use it together with the BSSID mask
+ * when matching addresses.
*/
- iter_data.hw_macaddr = common->macaddr;
+ iter_data.hw_macaddr = NULL;
memset(&iter_data.mask, 0xff, ETH_ALEN);
if (vif)
@@ -164,6 +169,10 @@ static void ath9k_htc_set_bssid_mask(struct ath9k_htc_priv *priv,
&iter_data);
memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
+
+ if (iter_data.hw_macaddr)
+ memcpy(common->macaddr, iter_data.hw_macaddr, ETH_ALEN);
+
ath_hw_setbssidmask(common);
}
@@ -1091,7 +1100,7 @@ static int ath9k_htc_add_interface(struct ieee80211_hw *hw,
goto out;
}
- ath9k_htc_set_bssid_mask(priv, vif);
+ ath9k_htc_set_mac_bssid_mask(priv, vif);
priv->vif_slot |= (1 << avp->index);
priv->nvifs++;
@@ -1154,7 +1163,7 @@ static void ath9k_htc_remove_interface(struct ieee80211_hw *hw,
ath9k_htc_set_opmode(priv);
- ath9k_htc_set_bssid_mask(priv, vif);
+ ath9k_htc_set_mac_bssid_mask(priv, vif);
/*
* Stop ANI only if there are no associated station interfaces.
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index f6a095f8ffcd..b6d1ac9fb326 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1290,8 +1290,9 @@ void ath9k_calculate_iter_data(struct ieee80211_hw *hw,
struct ath_common *common = ath9k_hw_common(ah);
/*
- * Use the hardware MAC address as reference, the hardware uses it
- * together with the BSSID mask when matching addresses.
+ * Pick the MAC address of the first interface as the new hardware
+ * MAC address. The hardware will use it together with the BSSID mask
+ * when matching addresses.
*/
memset(iter_data, 0, sizeof(*iter_data));
iter_data->hw_macaddr = common->macaddr;