From 2bd7e35da011f51d4fdb3b71f888c3a50194bfcd Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Fri, 15 Jun 2012 14:23:16 +0200 Subject: nl80211: use __cfg80211_rdev_from_attrs for testmode To fix the testmode cross-namespace access problem, use __cfg80211_rdev_from_attrs() to get the device instead of open-coding similar functionality. Signed-off-by: Johannes Berg --- net/wireless/nl80211.c | 23 ++++++++++------------- 1 file changed, 10 insertions(+), 13 deletions(-) diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 7e94d4d960bf..06623d064606 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -5230,21 +5230,18 @@ static int nl80211_testmode_dump(struct sk_buff *skb, nl80211_policy); if (err) return err; - if (nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]) { - phy_idx = nla_get_u32( - nl80211_fam.attrbuf[NL80211_ATTR_WIPHY]); - } else { - struct net_device *netdev; - err = get_rdev_dev_by_ifindex(sock_net(skb->sk), - nl80211_fam.attrbuf, - &rdev, &netdev); - if (err) - return err; - dev_put(netdev); - phy_idx = rdev->wiphy_idx; - cfg80211_unlock_rdev(rdev); + mutex_lock(&cfg80211_mutex); + rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk), + nl80211_fam.attrbuf); + if (IS_ERR(rdev)) { + mutex_unlock(&cfg80211_mutex); + return PTR_ERR(rdev); } + phy_idx = rdev->wiphy_idx; + rdev = NULL; + mutex_unlock(&cfg80211_mutex); + if (nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA]) cb->args[1] = (long)nl80211_fam.attrbuf[NL80211_ATTR_TESTDATA]; -- cgit v1.2.3