[PATCH 4.1 131/159] fq_codel: fix a use-after-free

From	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Newsgroups	linux.kernel
Subject	[PATCH 4.1 131/159] fq_codel: fix a use-after-free
Date	2015-09-26 23:30 +0200
Message-ID	<qd5cC-3vk-1@gated-at.bofh.it> (permalink)
References	<qd4Tf-384-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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

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

From: WANG Cong <xiyou.wangcong@gmail.com>

[ Upstream commit 052cbda41fdc243a8d40cce7ab3a6327b4b2887e ]

Fixes: 25331d6ce42b ("net: sched: implement qstat helper routines")
Cc: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Cong Wang <cwang@twopensource.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/sched/sch_fq_codel.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/sched/sch_fq_codel.c
+++ b/net/sched/sch_fq_codel.c
@@ -162,10 +162,10 @@ static unsigned int fq_codel_drop(struct
 	skb = dequeue_head(flow);
 	len = qdisc_pkt_len(skb);
 	q->backlogs[idx] -= len;
-	kfree_skb(skb);
 	sch->q.qlen--;
 	qdisc_qstats_drop(sch);
 	qdisc_qstats_backlog_dec(sch, skb);
+	kfree_skb(skb);
 	flow->dropped++;
 	return idx;
 }


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[PATCH 4.1 131/159] fq_codel: fix a use-after-free Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2015-09-26 23:30 +0200

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