Commit 496fcc29 authored by Johannes Berg's avatar Johannes Berg

nl80211: ignore HT/VHT capabilities without QoS/WMM

As HT/VHT depend heavily on QoS/WMM, it's not a good idea to
let userspace add clients that have HT/VHT but not QoS/WMM.
Since it does so in certain cases we've observed (client is
using HT IEs but not QoS/WMM) just ignore the HT/VHT info at
this point and don't pass it down to the drivers which might
unconditionally use it.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 70a3fd6c
...@@ -4400,6 +4400,16 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info) ...@@ -4400,6 +4400,16 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params)) if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
return -EINVAL; return -EINVAL;
/* HT/VHT requires QoS, but if we don't have that just ignore HT/VHT
* as userspace might just pass through the capabilities from the IEs
* directly, rather than enforcing this restriction and returning an
* error in this case.
*/
if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) {
params.ht_capa = NULL;
params.vht_capa = NULL;
}
/* When you run into this, adjust the code below for the new flag */ /* When you run into this, adjust the code below for the new flag */
BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7); BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 7);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment