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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: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -276,6 +276,13 @@ int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
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/* Check if the address belongs to the host. */
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if (addr_type == IPV6_ADDR_MAPPED) {
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/* Binding to v4-mapped address on a v6-only socket
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* makes no sense
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*/
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if (np->ipv6only) {
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err = -EINVAL;
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goto out;
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}
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v4addr = addr->sin6_addr.s6_addr32[3];
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if (inet_addr_type(net, v4addr) != RTN_LOCAL) {
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err = -EADDRNOTAVAIL;
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