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@stressinduktion.org>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Cc: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 9ec416552cc5a7eb87b533ff2e1da64d1640530e..8d69df16f6a87393a11013d0d55350c1cd0eee98 100644 (file)
--- 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);
 }