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authorJohannes Berg <johannes.berg@intel.com>2015-01-23 11:10:12 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-02-05 22:35:36 -0800
commit2811d3a0cf62f899bec79d535610c4535a8df893 (patch)
tree4f0327144c91a3a6f368a070e42dc9aebc46df01
parent535516f21ff0e7272e44496c575e3e6c4aa74342 (diff)
downloadlinux-linaro-stable-2811d3a0cf62f899bec79d535610c4535a8df893.tar.gz
nl80211: fix per-station group key get/del and memory leak
commit 0fa7b39131576dd1baa6ca17fca53c65d7f62249 upstream. In case userspace attempts to obtain key information for or delete a unicast key, this is currently erroneously rejected unless the driver sets the WIPHY_FLAG_IBSS_RSN flag. Apparently enough drivers do so it was never noticed. Fix that, and while at it fix a potential memory leak: the error path in the get_key() function was placed after allocating a message but didn't free it - move it to a better place. Luckily admin permissions are needed to call this operation. Fixes: e31b82136d1ad ("cfg80211/mac80211: allow per-station GTKs") Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--net/wireless/nl80211.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 62aebed..dc200bf 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -2629,6 +2629,9 @@ static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
if (!rdev->ops->get_key)
return -EOPNOTSUPP;
+ if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
+ return -ENOENT;
+
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
@@ -2648,10 +2651,6 @@ static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
goto nla_put_failure;
- if (pairwise && mac_addr &&
- !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
- return -ENOENT;
-
err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
get_key_callback);
@@ -2822,7 +2821,7 @@ static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
wdev_lock(dev->ieee80211_ptr);
err = nl80211_key_allowed(dev->ieee80211_ptr);
- if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
+ if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
!(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
err = -ENOENT;