[3.13.y-ckt stable] Patch "cfg80211: avoid mem leak on driver hint set" has been added to staging queue

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    cfg80211: avoid mem leak on driver hint set

to the linux-3.13.y-queue branch of the 3.13.y-ckt extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.13.y-queue

This patch is scheduled to be released in version 3.13.11-ckt15.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.13.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

------

>From b6141a3bab399e5196fa7404fe7e4023c3577451 Mon Sep 17 00:00:00 2001
From: Arik Nemtsov <arik at wizery.com>
Date: Thu, 4 Dec 2014 12:22:16 +0200
Subject: cfg80211: avoid mem leak on driver hint set

commit 34f05f543f02350e920bddb7660ffdd4697aaf60 upstream.

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.

Signed-off-by: Arik Nemtsov <arikx.nemtsov at intel.com>
Acked-by: Luis R. Rodriguez <mcgrof at suse.com>
Signed-off-by: Johannes Berg <johannes.berg at intel.com>
[ kamal: backport to 3.13-stable: context ]
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 net/wireless/reg.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 7da67fd..e90e22f 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -1455,7 +1455,7 @@ static enum reg_request_treatment
 __regulatory_hint(struct wiphy *wiphy,
 		  struct regulatory_request *pending_request)
 {
-	const struct ieee80211_regdomain *regd;
+	const struct ieee80211_regdomain *regd, *tmp;
 	bool intersect = false;
 	enum reg_request_treatment treatment;
 	struct regulatory_request *lr;
@@ -1491,7 +1491,9 @@ __regulatory_hint(struct wiphy *wiphy,
 				return REG_REQ_IGNORE;
 			}
 			treatment = REG_REQ_ALREADY_SET;
+			tmp = get_wiphy_regdom(wiphy);
 			rcu_assign_pointer(wiphy->regd, regd);
+			rcu_free_regdom(tmp);
 			goto new_request;
 		}
 		kfree(pending_request);
--
1.9.1