Commit 783ed5a7 authored by Vlad Yasevich's avatar Vlad Yasevich Committed by David S. Miller
Browse files

ipv6: Disallow binding to v4-mapped address on v6-only socket. 



A socket marked v6-only, can not receive or send traffic to v4-mapped
addresses.  Thus allowing binding to v4-mapped address on such a
socket makes no sense.

Signed-off-by: default avatarVlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 4097f663

net/ipv6/af_inet6.c

+7 −0
Original line number Diff line number Diff line
@@ -276,6 +276,13 @@ int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) 


	/* Check if the address belongs to the host. */

	if (addr_type == IPV6_ADDR_MAPPED) {

		/* Binding to v4-mapped address on a v6-only socket

		 * makes no sense

		 */

		if (np->ipv6only) {

			err = -EINVAL;

			goto out;

		}

		v4addr = addr->sin6_addr.s6_addr32[3];

		if (inet_addr_type(net, v4addr) != RTN_LOCAL) {

			err = -EADDRNOTAVAIL;