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 079df5168fb1026c75b18b3b0af10f5ccf9b1de5..7527c168e471dee8bde863546a98bb2217a1ee39 100644 (file)
--- 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);