net: Enable a userns root rtnl calls that are safe for unprivilged users

- Only allow moving network devices to network namespaces you have
  CAP_NET_ADMIN privileges over.

- Enable creating/deleting/modifying interfaces
- Enable adding/deleting addresses
- Enable adding/setting/deleting neighbour entries
- Enable adding/removing routes
- Enable adding/removing fib rules
- Enable setting the forwarding state
- Enable adding/removing ipv6 address labels
- Enable setting bridge parameter

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 9 deletions

diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 7adcdaf91c4d..f1c0c2e9cad5 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -1620,9 +1620,6 @@ static int neigh_delete(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
         struct net_device *dev = NULL;
         int err = -EINVAL;
 
-        if (!capable(CAP_NET_ADMIN))
-                return -EPERM;
-
         ASSERT_RTNL();
         if (nlmsg_len(nlh) < sizeof(*ndm))
                 goto out;
@@ -1687,9 +1684,6 @@ static int neigh_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
         struct net_device *dev = NULL;
         int err;
 
-        if (!capable(CAP_NET_ADMIN))
-                return -EPERM;
-
         ASSERT_RTNL();
         err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL);
         if (err < 0)
@@ -1968,9 +1962,6 @@ static int neightbl_set(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
         struct nlattr *tb[NDTA_MAX+1];
         int err;
 
-        if (!capable(CAP_NET_ADMIN))
-                return -EPERM;
-
         err = nlmsg_parse(nlh, sizeof(*ndtmsg), tb, NDTA_MAX,
                           nl_neightbl_policy);
         if (err < 0)