Merge tag 'mac80211-for-davem-2019-07-31' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211

Johannes Berg says:

====================
Just a few fixes:
 * revert NETIF_F_LLTX usage as it caused problems
 * avoid warning on WMM parameters from AP that are too short
 * fix possible null-ptr dereference in hwsim
 * fix interface combinations with 4-addr and crypto control
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

6 files changed, 41 insertions, 14 deletions

diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 06aac0aaae64..8dc6580e1787 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -1222,7 +1222,6 @@ static void ieee80211_if_setup(struct net_device *dev)
 static void ieee80211_if_setup_no_queue(struct net_device *dev)
 {
 	ieee80211_if_setup(dev);
-	dev->features |= NETIF_F_LLTX;
 	dev->priv_flags |= IFF_NO_QUEUE;
 }
 
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index a99ad0325309..4c888dc9bd81 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -2042,6 +2042,16 @@ ieee80211_sta_wmm_params(struct ieee80211_local *local,
 		ieee80211_regulatory_limit_wmm_params(sdata, &params[ac], ac);
 	}
 
+	/* WMM specification requires all 4 ACIs. */
+	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
+		if (params[ac].cw_min == 0) {
+			sdata_info(sdata,
+				   "AP has invalid WMM params (missing AC %d), using defaults\n",
+				   ac);
+			return false;
+		}
+	}
+
 	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
 		mlme_dbg(sdata,
 			 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 1b224fa27367..ad1e58184c4e 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -3796,9 +3796,7 @@ int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
 	}
 
 	/* Always allow software iftypes */
-	if (local->hw.wiphy->software_iftypes & BIT(iftype) ||
-	    (iftype == NL80211_IFTYPE_AP_VLAN &&
-	     local->hw.wiphy->flags & WIPHY_FLAG_4ADDR_AP)) {
+	if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
 		if (radar_detect)
 			return -EINVAL;
 		return 0;
@@ -3833,7 +3831,8 @@ int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
 
 		if (sdata_iter == sdata ||
 		    !ieee80211_sdata_running(sdata_iter) ||
-		    local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
+		    cfg80211_iftype_allowed(local->hw.wiphy,
+					    wdev_iter->iftype, 0, 1))
 			continue;
 
 		params.iftype_num[wdev_iter->iftype]++;
diff --git a/net/wireless/core.c b/net/wireless/core.c
index 45d9afcff6d5..32b3c719fdfc 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -1410,10 +1410,8 @@ static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
 		}
 		break;
 	case NETDEV_PRE_UP:
-		if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)) &&
-		    !(wdev->iftype == NL80211_IFTYPE_AP_VLAN &&
-		      rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP &&
-		      wdev->use_4addr))
+		if (!cfg80211_iftype_allowed(wdev->wiphy, wdev->iftype,
+					     wdev->use_4addr, 0))
 			return notifier_from_errno(-EOPNOTSUPP);
 
 		if (rfkill_blocked(rdev->rfkill))
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index fc83dd179c1a..fd05ae1437a9 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -3484,9 +3484,7 @@ static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
 			return err;
 	}
 
-	if (!(rdev->wiphy.interface_modes & (1 << type)) &&
-	    !(type == NL80211_IFTYPE_AP_VLAN && params.use_4addr &&
-	      rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP))
+	if (!cfg80211_iftype_allowed(&rdev->wiphy, type, params.use_4addr, 0))
 		return -EOPNOTSUPP;
 
 	err = nl80211_parse_mon_options(rdev, type, info, &params);
diff --git a/net/wireless/util.c b/net/wireless/util.c
index 1c39d6a2e850..d0e35b7b9e35 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -1697,7 +1697,7 @@ int cfg80211_iter_combinations(struct wiphy *wiphy,
 	for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
 		num_interfaces += params->iftype_num[iftype];
 		if (params->iftype_num[iftype] > 0 &&
-		    !(wiphy->software_iftypes & BIT(iftype)))
+		    !cfg80211_iftype_allowed(wiphy, iftype, 0, 1))
 			used_iftypes |= BIT(iftype);
 	}
 
@@ -1719,7 +1719,7 @@ int cfg80211_iter_combinations(struct wiphy *wiphy,
 			return -ENOMEM;
 
 		for (iftype = 0; iftype < NUM_NL80211_IFTYPES; iftype++) {
-			if (wiphy->software_iftypes & BIT(iftype))
+			if (cfg80211_iftype_allowed(wiphy, iftype, 0, 1))
 				continue;
 			for (j = 0; j < c->n_limits; j++) {
 				all_iftypes |= limits[j].types;
@@ -2072,3 +2072,26 @@ int ieee80211_get_vht_max_nss(struct ieee80211_vht_cap *cap,
 	return max_vht_nss;
 }
 EXPORT_SYMBOL(ieee80211_get_vht_max_nss);
+
+bool cfg80211_iftype_allowed(struct wiphy *wiphy, enum nl80211_iftype iftype,
+			     bool is_4addr, u8 check_swif)
+
+{
+	bool is_vlan = iftype == NL80211_IFTYPE_AP_VLAN;
+
+	switch (check_swif) {
+	case 0:
+		if (is_vlan && is_4addr)
+			return wiphy->flags & WIPHY_FLAG_4ADDR_AP;
+		return wiphy->interface_modes & BIT(iftype);
+	case 1:
+		if (!(wiphy->software_iftypes & BIT(iftype)) && is_vlan)
+			return wiphy->flags & WIPHY_FLAG_4ADDR_AP;
+		return wiphy->software_iftypes & BIT(iftype);
+	default:
+		break;
+	}
+
+	return false;
+}
+EXPORT_SYMBOL(cfg80211_iftype_allowed);