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authorJohannes Berg <johannes.berg@intel.com>2019-08-01 10:30:33 +0300
committerJohannes Berg <johannes.berg@intel.com>2019-08-21 11:15:33 +0300
commit5fd2f91ad483baffdbe798f8a08f1b41442d1e24 (patch)
treeb648a28568c8b20133731b5a18e58fe8f1373454 /net
parenta1c4cd67840ef80f6ca5f73326fa9a6719303a95 (diff)
downloadlinux-5fd2f91ad483baffdbe798f8a08f1b41442d1e24.tar.xz
mac80211: fix possible sta leak
If TDLS station addition is rejected, the sta memory is leaked. Avoid this by moving the check before the allocation. Cc: stable@vger.kernel.org Fixes: 7ed5285396c2 ("mac80211: don't initiate TDLS connection if station is not associated to AP") Link: https://lore.kernel.org/r/20190801073033.7892-1-johannes@sipsolutions.net Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net')
-rw-r--r--net/mac80211/cfg.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 4d458067d80d..111c400199ec 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1546,6 +1546,11 @@ static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
if (is_multicast_ether_addr(mac))
return -EINVAL;
+ if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER) &&
+ sdata->vif.type == NL80211_IFTYPE_STATION &&
+ !sdata->u.mgd.associated)
+ return -EINVAL;
+
sta = sta_info_alloc(sdata, mac, GFP_KERNEL);
if (!sta)
return -ENOMEM;
@@ -1553,10 +1558,6 @@ static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
sta->sta.tdls = true;
- if (sta->sta.tdls && sdata->vif.type == NL80211_IFTYPE_STATION &&
- !sdata->u.mgd.associated)
- return -EINVAL;
-
err = sta_apply_parameters(local, sta, params);
if (err) {
sta_info_free(local, sta);