[RTNETLINK]: rtnl_link: allow specifying initial device address

Drivers need to validate the initial addresses in their netlink attribute
validation function or manually reject them if they can't support this.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 2 deletions

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 7b6b16396745..864cbdf31ed7 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -1032,8 +1032,7 @@ replay:
 
                 if (ifm->ifi_index || ifm->ifi_flags || ifm->ifi_change)
                         return -EOPNOTSUPP;
-                if (tb[IFLA_ADDRESS] || tb[IFLA_BROADCAST] || tb[IFLA_MAP] ||
-                    tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
+                if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO])
                         return -EOPNOTSUPP;
 
                 if (!ops) {
@@ -1065,6 +1064,12 @@ replay:
 
                 if (tb[IFLA_MTU])
                         dev->mtu = nla_get_u32(tb[IFLA_MTU]);
+                if (tb[IFLA_ADDRESS])
+                        memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]),
+                               nla_len(tb[IFLA_ADDRESS]));
+                if (tb[IFLA_BROADCAST])
+                        memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]),
+                               nla_len(tb[IFLA_BROADCAST]));
                 if (tb[IFLA_TXQLEN])
                         dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]);
                 if (tb[IFLA_WEIGHT])