linux-kernel - [PATCH 4.3 094/157] net: sched: fix missing free per cpu on qstats

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Message-Id: <20160127180937.613169806@linuxfoundation.org>
Date:	Wed, 27 Jan 2016 10:12:41 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	John Fastabend <john.r.fastabend@...el.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Daniel Borkmann <daniel@...earbox.net>,
	"David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.3 094/157] net: sched: fix missing free per cpu on qstats

4.3-stable review patch.  If anyone has any objections, please let me know.

------------------

From: John Fastabend <john.fastabend@...il.com>

[ Upstream commit 73c20a8b7245273125cfe92c4b46e6fdb568a801 ]

When a qdisc is using per cpu stats (currently just the ingress
qdisc) only the bstats are being freed. This also free's the qstats.

Fixes: b0ab6f92752b9f9d8 ("net: sched: enable per cpu qstats")
Signed-off-by: John Fastabend <john.r.fastabend@...el.com>
Acked-by: Eric Dumazet <edumazet@...gle.com>
Acked-by: Daniel Borkmann <daniel@...earbox.net>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/sched/sch_generic.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -658,8 +658,10 @@ static void qdisc_rcu_free(struct rcu_he
 {
 	struct Qdisc *qdisc = container_of(head, struct Qdisc, rcu_head);
 
-	if (qdisc_is_percpu_stats(qdisc))
+	if (qdisc_is_percpu_stats(qdisc)) {
 		free_percpu(qdisc->cpu_bstats);
+		free_percpu(qdisc->cpu_qstats);
+	}
 
 	kfree((char *) qdisc - qdisc->padded);
 }