[3.16.y-ckt stable] Patch "ip6mr: call del_timer_sync() in ip6mr_free_table()" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    ip6mr: call del_timer_sync() in ip6mr_free_table()

to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.16.y-queue

This patch is scheduled to be released in version 3.16.7-ckt22.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From e96522962310dc6547716f0287d98f0f158a44cc Mon Sep 17 00:00:00 2001
From: WANG Cong <xiyou.wangcong at gmail.com>
Date: Tue, 31 Mar 2015 11:01:47 -0700
Subject: ip6mr: call del_timer_sync() in ip6mr_free_table()

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 at stressinduktion.org>
Signed-off-by: Cong Wang <xiyou.wangcong at gmail.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
Cc: Ben Hutchings <ben at decadent.org.uk>
[ luis: backported to 3.16: adjusted context ]
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 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 72f3baee76d9..5e739bb6ae90 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);
 }