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| author | Johannes Berg <johannes.berg@intel.com> | 2015-01-23 11:10:12 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-02-05 22:35:36 -0800 |
| commit | 2811d3a0cf62f899bec79d535610c4535a8df893 (patch) | |
| tree | 4f0327144c91a3a6f368a070e42dc9aebc46df01 /net | |
| parent | 535516f21ff0e7272e44496c575e3e6c4aa74342 (diff) | |
| download | lwn-2811d3a0cf62f899bec79d535610c4535a8df893.tar.gz lwn-2811d3a0cf62f899bec79d535610c4535a8df893.zip | |
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>
Diffstat (limited to 'net')
| -rw-r--r-- | net/wireless/nl80211.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 62aebed7c6e2..dc200bf831ae 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; |