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[PATCH] cfg80211: avoid mem leak on driver hint set

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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@xxxxxxxxxxxxxxx
Signed-off-by: Arik Nemtsov <arikx.nemtsov@xxxxxxxxx>
---
 net/wireless/reg.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 004ea14..8941e1c 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -1916,7 +1916,7 @@ 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);
@@ -1936,7 +1936,10 @@ 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);
 	}
 
 
-- 
1.9.1

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