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From:   Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
To:     vinicius.gomes@intel.com, davem@davemloft.net
Cc:     jhs@mojatatu.com, xiyou.wangcong@gmail.com, jiri@resnulli.us,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Subject: [PATCH] net: sched: sch_taprio: fix memleak in error path for sched list parse
Date:   Tue,  6 Aug 2019 13:04:25 +0300
Message-Id: <20190806100425.4356-1-ivan.khoronzhuk@linaro.org>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

In case off error, all entries should be freed from the sched list
before deleting it. For simplicity use rcu way.

Fixes: 5a781ccbd19e46 ("tc: Add support for configuring the taprio scheduler")
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
---

Based on net/master

 net/sched/sch_taprio.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/sched/sch_taprio.c b/net/sched/sch_taprio.c
index b55a82c1e1bc..4f6333035841 100644
--- a/net/sched/sch_taprio.c
+++ b/net/sched/sch_taprio.c
@@ -1451,7 +1451,8 @@ static int taprio_change(struct Qdisc *sch, struct nlattr *opt,
 	spin_unlock_bh(qdisc_lock(sch));
 
 free_sched:
-	kfree(new_admin);
+	if (new_admin)
+		call_rcu(&new_admin->rcu, taprio_free_sched_cb);
 
 	return err;
 }
-- 
2.17.1