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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 22:36:05 -0800 |
| commit | a916db4b2568837bc2f5bc3e2a97329af26c8dc4 (patch) | |
| tree | 63f46b2884d4c327d18781a74ca078fc6e945ab1 | |
| parent | d75bd2a69490b16806f08ab79f4078e8d8bcbe6c (diff) | |
| download | linux-stable-a916db4b2568837bc2f5bc3e2a97329af26c8dc4.tar.gz linux-stable-a916db4b2568837bc2f5bc3e2a97329af26c8dc4.tar.bz2 linux-stable-a916db4b2568837bc2f5bc3e2a97329af26c8dc4.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>
| -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 ea558e07981f..213048ad31c7 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -2805,6 +2805,9 @@ 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; @@ -2824,10 +2827,6 @@ 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); @@ -2998,7 +2997,7 @@ 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; |