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>

3 files changed, 0 insertions, 15 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index d39fe490da08..fc0e13ad6337 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -3514,9 +3514,6 @@ inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
         struct in6_addr *pfx;
         int err;
 
-        if (!capable(CAP_NET_ADMIN))
-                return -EPERM;
-
         err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
         if (err < 0)
                 return err;
@@ -3587,9 +3584,6 @@ inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
         u8 ifa_flags;
         int err;
 
-        if (!capable(CAP_NET_ADMIN))
-                return -EPERM;
-
         err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
         if (err < 0)
                 return err;
diff --git a/net/ipv6/addrlabel.c b/net/ipv6/addrlabel.c
index b106f80be0c5..ff76eecfd622 100644
--- a/net/ipv6/addrlabel.c
+++ b/net/ipv6/addrlabel.c
@@ -425,9 +425,6 @@ static int ip6addrlbl_newdel(struct sk_buff *skb, struct nlmsghdr *nlh,
         u32 label;
         int err = 0;
 
-        if (!capable(CAP_NET_ADMIN))
-                return -EPERM;
-
         err = nlmsg_parse(nlh, sizeof(*ifal), tb, IFAL_MAX, ifal_policy);
         if (err < 0)
                 return err;
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index a86b65599328..8f124f575116 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -2446,9 +2446,6 @@ static int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *a
         struct fib6_config cfg;
         int err;
 
-        if (!capable(CAP_NET_ADMIN))
-                return -EPERM;
-
         err = rtm_to_fib6_config(skb, nlh, &cfg);
         if (err < 0)
                 return err;
@@ -2464,9 +2461,6 @@ static int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *a
         struct fib6_config cfg;
         int err;
 
-        if (!capable(CAP_NET_ADMIN))
-                return -EPERM;
-
         err = rtm_to_fib6_config(skb, nlh, &cfg);
         if (err < 0)
                 return err;