nl80211: prevent additions to old station flags API

We don't really want/need to maintain the old
station flags API any more, so refuse changes
to new (not yet defined) flags from the old
flags API.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 8 insertions, 2 deletions

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index b67b1114e25a..f1b0774d098b 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -2410,10 +2410,16 @@ static int parse_station_flags(struct genl_info *info,
                 return -EINVAL;
         }
 
-        for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++)
-                if (flags[flag])
+        for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
+                if (flags[flag]) {
                         params->sta_flags_set |= (1<<flag);
 
+                        /* no longer support new API additions in old API */
+                        if (flag > NL80211_STA_FLAG_MAX_OLD_API)
+                                return -EINVAL;
+                }
+        }
+
         return 0;
 }