sctp: do not inherit ipv6_{mc|ac|fl}_list from parent

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>
Gbp-Pq: Topic bugfix/all
Gbp-Pq: Name sctp-do-not-inherit-ipv6_-mc-ac-fl-_list-from-parent.patch

diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
index 6a2532dd31c4ae785e87ff3b11aa3a505cc88e94..5c4fd79a6e53a42adad8e6fd8524567454afa546 100644 (file)
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -666,6 +666,9 @@ 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);