linux-kernel - [PATCH 3.12 51/91] ip6mr: call del_timer_sync() in ip6mr_free

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Date:	Tue,  5 Jan 2016 18:46:35 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, WANG Cong <xiyou.wangcong@...il.com>,
	Hannes Frederic Sowa <hannes@...essinduktion.org>,
	"David S . Miller" <davem@...emloft.net>,
	Ben Hutchings <ben@...adent.org.uk>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 51/91] ip6mr: call del_timer_sync() in ip6mr_free_table()

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

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

===============

commit 7ba0c47c34a1ea5bc7a24ca67309996cce0569b5 upstream.

We need to wait for the flying timers, since we
are going to free the mrtable right after it.

Cc: Hannes Frederic Sowa <hannes@...essinduktion.org>
Signed-off-by: Cong Wang <xiyou.wangcong@...il.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Cc: Ben Hutchings <ben@...adent.org.uk>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 net/ipv6/ip6mr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 9ad561152eb6..8b61288e5746 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -336,7 +336,7 @@ static struct mr6_table *ip6mr_new_table(struct net *net, u32 id)
 
 static void ip6mr_free_table(struct mr6_table *mrt)
 {
-	del_timer(&mrt->ipmr_expire_timer);
+	del_timer_sync(&mrt->ipmr_expire_timer);
 	mroute_clean_tables(mrt, true);
 	kfree(mrt);
 }
-- 
2.6.4

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