cfg80211: ocb: Fix null pointer deref if join_ocb is unimplemented

Signed-off-by: Ola Olsson <ola.olsson@sonymobile.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/wireless/ocb.c b/net/wireless/ocb.c
index c00d4a7..e64dbf1 100644 (file)
--- a/net/wireless/ocb.c
+++ b/net/wireless/ocb.c
@@ -29,6 +29,9 @@ int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
                return -EOPNOTSUPP;
 
+       if (!rdev->ops->join_ocb)
+               return -EOPNOTSUPP;
+
        if (WARN_ON(!setup->chandef.chan))
                return -EINVAL;