From: Arik Nemtsov <arik@wizery.com>
Date: Thu, 4 Dec 2014 10:22:16 +0000 (+0200)
Subject: cfg80211: avoid mem leak on driver hint set
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=34f05f543f02350e920bddb7660ffdd4697aaf60;p=linux-beck.git

cfg80211: avoid mem leak on driver hint set

In the already-set and intersect case of a driver-hint, the previous
wiphy regdomain was not freed before being reset with a copy of the
cfg80211 regdomain.

Cc: stable@vger.kernel.org
Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Acked-by: Luis R. Rodriguez <mcgrof@suse.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---

diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 47be6163381c..7ddd16a51adf 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -1907,7 +1907,7 @@ static enum reg_request_treatment
 reg_process_hint_driver(struct wiphy *wiphy,
 			struct regulatory_request *driver_request)
 {
-	const struct ieee80211_regdomain *regd;
+	const struct ieee80211_regdomain *regd, *tmp;
 	enum reg_request_treatment treatment;
 
 	treatment = __reg_process_hint_driver(driver_request);
@@ -1927,7 +1927,10 @@ reg_process_hint_driver(struct wiphy *wiphy,
 			reg_free_request(driver_request);
 			return REG_REQ_IGNORE;
 		}
+
+		tmp = get_wiphy_regdom(wiphy);
 		rcu_assign_pointer(wiphy->regd, regd);
+		rcu_free_regdom(tmp);
 	}