netdev - [PATCH net] cls_matchall: fix tcf_unbind

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Message-Id: <1534238906-16097-1-git-send-email-liuhangbin@gmail.com>
Date:   Tue, 14 Aug 2018 17:28:26 +0800
From:   Hangbin Liu <liuhangbin@...il.com>
To:     netdev@...r.kernel.org
Cc:     David Miller <davem@...emloft.net>,
        WANG Cong <xiyou.wangcong@...il.com>,
        Yotam Gigi <yotamg@...lanox.com>,
        Jiri Pirko <jiri@...lanox.com>,
        Hangbin Liu <liuhangbin@...il.com>
Subject: [PATCH net] cls_matchall: fix tcf_unbind_filter missing

Fix tcf_unbind_filter missing in cls_matchall as this will trigger
WARN_ON() in cbq_destroy_class().

Fixes: fd62d9f5c575f ("net/sched: matchall: Fix configuration race")
Reported-by: Li Shuang <shuali@...hat.com>
Signed-off-by: Hangbin Liu <liuhangbin@...il.com>
---
 net/sched/cls_matchall.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/sched/cls_matchall.c b/net/sched/cls_matchall.c
index 47b207e..7ad65da 100644
--- a/net/sched/cls_matchall.c
+++ b/net/sched/cls_matchall.c
@@ -111,6 +111,8 @@ static void mall_destroy(struct tcf_proto *tp, struct netlink_ext_ack *extack)
 	if (!head)
 		return;
 
+	tcf_unbind_filter(tp, &head->res);
+
 	if (!tc_skip_hw(head->flags))
 		mall_destroy_hw_filter(tp, head, (unsigned long) head, extack);
 
-- 
2.5.5