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    Subject[PATCH 4.9 03/30] ipv6: Consider sk_bound_dev_if when binding a socket to an address
    Date
    4.9-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: David Ahern <dsahern@gmail.com>

    [ Upstream commit c5ee066333ebc322a24a00a743ed941a0c68617e ]

    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.

    This problem exists from the beginning of git history.

    Signed-off-by: David Ahern <dsahern@gmail.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    net/ipv6/af_inet6.c | 3 +++
    1 file changed, 3 insertions(+)

    --- a/net/ipv6/af_inet6.c
    +++ b/net/ipv6/af_inet6.c
    @@ -359,6 +359,9 @@ int inet6_bind(struct socket *sock, stru
    err = -EINVAL;
    goto out_unlock;
    }
    + }
    +
    + if (sk->sk_bound_dev_if) {
    dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
    if (!dev) {
    err = -ENODEV;

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