nl80211: Fix potential memory leak from parse_acl_data

If parse_acl_data succeeds but the subsequent parsing of smps
attributes fails, there will be a memory leak due to early returns.
Fix that by moving the ACL parsing later.

Cc: stable@vger.kernel.org
Fixes: 18998c381b19b ("cfg80211: allow requesting SMPS mode on ap start")
Signed-off-by: Ola Olsson <ola.olsson@sonymobile.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index d693c9d031fc8c9869277e2ff758f05353e22a1a..40ef5d604eb471784058b41f318efe1116908776 100644 (file)
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -3432,12 +3432,6 @@ static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
                                           wdev->iftype))
                return -EINVAL;
 
-       if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
-               params.acl = parse_acl_data(&rdev->wiphy, info);
-               if (IS_ERR(params.acl))
-                       return PTR_ERR(params.acl);
-       }
-
        if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
                params.smps_mode =
                        nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
@@ -3461,6 +3455,12 @@ static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
                params.smps_mode = NL80211_SMPS_OFF;
        }
 
+       if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
+               params.acl = parse_acl_data(&rdev->wiphy, info);
+               if (IS_ERR(params.acl))
+                       return PTR_ERR(params.acl);
+       }
+
        wdev_lock(wdev);
        err = rdev_start_ap(rdev, dev, &params);
        if (!err) {