commit 4baf6bea37247e59f1971e8009d13aeda95edba2
author Ola Olsson <ola1olsson@gmail.com> Thu Oct 29 07:04:58 2015 +0100
committer Johannes Berg <johannes.berg@intel.com> Tue Nov 03 10:40:58 2015 +0100
tree e64df44ad8496ec39bfd9461a932975c06ab7c51
parent 519ee6918b91abdc4bc9720deae17599a109eb40

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>

net/wireless/nl80211.c

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index d693c9d..40ef5d6 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -3432,12 +3432,6 @@
 					   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 @@
 		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) {