diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 0ec9779c2b56..af232912fff8 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -71,7 +71,7 @@ static int get_rdev_dev_by_ifindex(struct net *netns, struct nlattr **attrs, } static struct cfg80211_registered_device * -__cfg80211_rdev_from_info(struct genl_info *info) +__cfg80211_rdev_from_info(struct net *netns, struct genl_info *info) { struct cfg80211_registered_device *rdev = NULL, *tmp; struct net_device *netdev; @@ -88,7 +88,7 @@ __cfg80211_rdev_from_info(struct genl_info *info) if (info->attrs[NL80211_ATTR_IFINDEX]) { int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]); - netdev = dev_get_by_index(genl_info_net(info), ifindex); + netdev = dev_get_by_index(netns, ifindex); if (netdev) { if (netdev->ieee80211_ptr) tmp = wiphy_to_dev( @@ -110,10 +110,13 @@ __cfg80211_rdev_from_info(struct genl_info *info) } } - if (rdev) - return rdev; + if (!rdev) + return ERR_PTR(-ENODEV); - return ERR_PTR(-ENODEV); + if (netns != wiphy_net(&rdev->wiphy)) + return ERR_PTR(-ENODEV); + + return rdev; } /* @@ -137,12 +140,12 @@ __cfg80211_rdev_from_info(struct genl_info *info) * be checked with IS_ERR() for errors. */ static struct cfg80211_registered_device * -cfg80211_get_dev_from_info(struct genl_info *info) +cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info) { struct cfg80211_registered_device *rdev; mutex_lock(&cfg80211_mutex); - rdev = __cfg80211_rdev_from_info(info); + rdev = __cfg80211_rdev_from_info(netns, info); /* if it is not an error we grab the lock on * it to assure it won't be going away while @@ -1419,7 +1422,7 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info) } if (!netdev) { - rdev = __cfg80211_rdev_from_info(info); + rdev = __cfg80211_rdev_from_info(genl_info_net(info), info); if (IS_ERR(rdev)) { mutex_unlock(&cfg80211_mutex); return PTR_ERR(rdev); @@ -6623,7 +6626,7 @@ static int nl80211_pre_doit(struct genl_ops *ops, struct sk_buff *skb, rtnl_lock(); if (ops->internal_flags & NL80211_FLAG_NEED_WIPHY) { - rdev = cfg80211_get_dev_from_info(info); + rdev = cfg80211_get_dev_from_info(genl_info_net(info), info); if (IS_ERR(rdev)) { if (rtnl) rtnl_unlock();