From 5e7d9f0b3f729a64b99e58047f7bb0ff36acb759 Mon Sep 17 00:00:00 2001
From: Eric Dumazet <edumazet@google.com>
Date: Wed, 17 May 2017 07:16:40 -0700
Subject: sctp: do not inherit ipv6_{mc|ac|fl}_list from parent

[ Upstream commit fdcee2cbb8438702ea1b328fb6e0ac5e9a40c7f8 ]

SCTP needs fixes similar to 83eaddab4378 ("ipv6/dccp: do not inherit
ipv6_mc_list from parent"), otherwise bad things can happen.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
index b9cbdf5..0c09060 100644
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -678,6 +678,9 @@ static struct sock *sctp_v6_create_accept_sk(struct sock *sk,
 	newnp = inet6_sk(newsk);
 
 	memcpy(newnp, np, sizeof(struct ipv6_pinfo));
+	newnp->ipv6_mc_list = NULL;
+	newnp->ipv6_ac_list = NULL;
+	newnp->ipv6_fl_list = NULL;
 
 	rcu_read_lock();
 	opt = rcu_dereference(np->opt);
-- 
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