[PATCH 3.19.y-ckt 052/130] net_sched: fix a use-after-free in sfq

From: Kamal Mostafa
Date: Thu Aug 27 2015 - 18:38:45 EST

3.19.8-ckt6 -stable review patch. If anyone has any objections, please let me know.


From: WANG Cong <xiyou.wangcong@xxxxxxxxx>

commit e8d092aafd9e68c04d7b468e95ff7a617998a796 upstream.

Fixes: 25331d6ce42b ("net: sched: implement qstat helper routines")
Cc: John Fastabend <john.fastabend@xxxxxxxxx>
Signed-off-by: Cong Wang <xiyou.wangcong@xxxxxxxxx>
Signed-off-by: Cong Wang <cwang@xxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
net/sched/sch_sfq.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/sched/sch_sfq.c b/net/sched/sch_sfq.c
index b877140..0f65ba4 100644
--- a/net/sched/sch_sfq.c
+++ b/net/sched/sch_sfq.c
@@ -329,10 +329,10 @@ drop:
len = qdisc_pkt_len(skb);
slot->backlog -= len;
sfq_dec(q, x);
- kfree_skb(skb);
qdisc_qstats_backlog_dec(sch, skb);
+ kfree_skb(skb);
return len;


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/