queue-5.1/ipv6-consider-sk_bound_dev_if-when-binding-a-raw-socket-to-an-address.patch

   1 From foo@baz Fri 31 May 2019 03:16:39 PM PDT
   2 From: Mike Manning <mmanning@vyatta.att-mail.com>
   3 Date: Mon, 20 May 2019 19:57:17 +0100
   4 Subject: ipv6: Consider sk_bound_dev_if when binding a raw socket to an address
   5
   6 From: Mike Manning <mmanning@vyatta.att-mail.com>
   7
   8 [ Upstream commit 72f7cfab6f93a8ea825fab8ccfb016d064269f7f ]
   9
  10 IPv6 does not consider if the socket is bound to a device when binding
  11 to an address. The result is that a socket can be bound to eth0 and
  12 then bound to the address of eth1. If the device is a VRF, the result
  13 is that a socket can only be bound to an address in the default VRF.
  14
  15 Resolve by considering the device if sk_bound_dev_if is set.
  16
  17 Signed-off-by: Mike Manning <mmanning@vyatta.att-mail.com>
  18 Reviewed-by: David Ahern <dsahern@gmail.com>
  19 Tested-by: David Ahern <dsahern@gmail.com>
  20 Signed-off-by: David S. Miller <davem@davemloft.net>
  21 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  22 ---
  23  net/ipv6/raw.c |    2 ++
  24  1 file changed, 2 insertions(+)
  25
  26 --- a/net/ipv6/raw.c
  27 +++ b/net/ipv6/raw.c
  28 @@ -287,7 +287,9 @@ static int rawv6_bind(struct sock *sk, s
  29                         /* Binding to link-local address requires an interface */
  30                         if (!sk->sk_bound_dev_if)
  31                                 goto out_unlock;
  32 +               }
  33
  34 +               if (sk->sk_bound_dev_if) {
  35                         err = -ENODEV;
  36                         dev = dev_get_by_index_rcu(sock_net(sk),
  37                                                    sk->sk_bound_dev_if);