Commit ed753b39 authored May 20, 2019 by Mike Manning Committed by Greg Kroah-Hartman Jun 04, 2019

ipv6: Consider sk_bound_dev_if when binding a raw socket to an address



[ Upstream commit 72f7cfab6f93a8ea825fab8ccfb016d064269f7f ]

IPv6 does not consider if the socket is bound to a device when binding
to an address. The result is that a socket can be bound to eth0 and
then bound to the address of eth1. If the device is a VRF, the result
is that a socket can only be bound to an address in the default VRF.

Resolve by considering the device if sk_bound_dev_if is set.

Signed-off-by: Mike Manning <mmanning@vyatta.att-mail.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Tested-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 46702dd5

net/ipv6/raw.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -288,7 +288,9 @@ static int rawv6_bind(struct sock sk, struct sockaddr uaddr, int addr_len)
		/* Binding to link-local address requires an interface */
		if (!sk->sk_bound_dev_if)
		goto out_unlock;
		}

		if (sk->sk_bound_dev_if) {
		err = -ENODEV;
		dev = dev_get_by_index_rcu(sock_net(sk),
		sk->sk_bound_dev_if);