ipv6/dccp: do not inherit ipv6_mc_list from parent

Like commit 657831ffc38e ("dccp/tcp: do not inherit mc_list from parent")
we should clear ipv6_mc_list etc. for IPv6 sockets too.

Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 83eaddab4378db256d00d295bda6ca997cd13a52)

Orabug: 26142901
CVE-2017-9077

Signed-off-by: Kirtikar Kashyap <kirtikar.kashyap@oracle.com>
Reviewed-by: Jack Vogel <jack.vogel@oracle.com>
 Conflicts:
	net/dccp/ipv6.c

diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index a0490508d21352e8effff0688a190f518b8ab214..5ac1f5c3ef44680ddbf027ce28fb41dd68201657 100644 (file)
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -446,6 +446,9 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk,
                newsk->sk_backlog_rcv = dccp_v4_do_rcv;
                newnp->pktoptions  = NULL;
                newnp->opt         = NULL;
+               newnp->ipv6_mc_list = NULL;
+               newnp->ipv6_ac_list = NULL;
+               newnp->ipv6_fl_list = NULL;
                newnp->mcast_oif   = inet6_iif(skb);
                newnp->mcast_hops  = ipv6_hdr(skb)->hop_limit;
 
@@ -531,6 +534,9 @@ static struct sock *dccp_v6_request_recv_sock(struct sock *sk,
                        skb_set_owner_r(newnp->pktoptions, newsk);
        }
        newnp->opt        = NULL;
+       newnp->ipv6_mc_list = NULL;
+       newnp->ipv6_ac_list = NULL;
+       newnp->ipv6_fl_list = NULL;
        newnp->mcast_oif  = inet6_iif(skb);
        newnp->mcast_hops = ipv6_hdr(skb)->hop_limit;
 

diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index eb49585418af9977a3989673fc29d6527bf604e4..877b9ca9c1d8c6745a0271a6f6460b18c39585af 100644 (file)
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1117,6 +1117,7 @@ static struct sock *tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
                newtp->af_specific = &tcp_sock_ipv6_mapped_specific;
 #endif
 
+               newnp->ipv6_mc_list = NULL;
                newnp->ipv6_ac_list = NULL;
                newnp->ipv6_fl_list = NULL;
                newnp->pktoptions  = NULL;
@@ -1188,6 +1189,7 @@ static struct sock *tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
           First: no IPv4 options.
         */
        newinet->inet_opt = NULL;
+       newnp->ipv6_mc_list = NULL;
        newnp->ipv6_ac_list = NULL;
        newnp->ipv6_fl_list = NULL;