@@ -174,6 +174,7 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
if (val == PF_INET) {
struct ipv6_txoptions *opt;
struct sk_buff *pktopt;
+ struct proto *expected_prot;
if (sk->sk_type == SOCK_RAW)
break;
@@ -199,6 +200,17 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
break;
}
+ if (sk->sk_protocol == IPPROTO_TCP &&
+ sk->sk_prot != &tcpv6_prot)
+ break;
+
+ expected_prot = &udpv6_prot;
+ if (sk->sk_protocol == IPPROTO_UDPLITE)
+ expected_prot = &udplitev6_prot;
+
+ if (sk->sk_prot != expected_prot)
+ break;
+
fl6_free_socklist(sk);
__ipv6_sock_mc_close(sk);
With this patch IPV6 code ensure that only sockets with the expected sk->sk_prot are converted to IPV4. Signed-off-by: Boris Pismenny <borisp@mellanox.com> --- net/ipv6/ipv6_sockglue.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)