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nl80211: fix per-station group key get/del and memory leak
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.
Cc: stable@vger.kernel.org
Fixes: e31b82136d
("cfg80211/mac80211: allow per-station GTKs")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
parent
3a5c5e81d8
commit
0fa7b39131
1 changed files with 4 additions and 5 deletions
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@ -2854,6 +2854,9 @@ static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
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if (!rdev->ops->get_key)
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return -EOPNOTSUPP;
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if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
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return -ENOENT;
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msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
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if (!msg)
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return -ENOMEM;
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@ -2873,10 +2876,6 @@ static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
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nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
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goto nla_put_failure;
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if (pairwise && mac_addr &&
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!(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
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return -ENOENT;
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err = rdev_get_key(rdev, dev, key_idx, pairwise, mac_addr, &cookie,
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get_key_callback);
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@ -3047,7 +3046,7 @@ static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
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wdev_lock(dev->ieee80211_ptr);
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err = nl80211_key_allowed(dev->ieee80211_ptr);
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if (key.type == NL80211_KEYTYPE_PAIRWISE && mac_addr &&
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if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
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!(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
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err = -ENOENT;
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