From: Eric Dumazet <edumazet@google.com>
Date: Wed, 17 May 2017 14:16:40 +0000 (-0700)
Subject: sctp: do not inherit ipv6_{mc|ac|fl}_list from parent
X-Git-Tag: release-20171130_firefly~4^2~100^2~1^2~5^2~43
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ffa551def59c9b0e1747955af6a742443ae152fc;p=firefly-linux-kernel-4.4.55.git

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 079df5168fb1..7527c168e471 100644
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -674,6 +674,9 @@ 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);