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net: Push capable(CAP_NET_ADMIN) into the rtnl methods

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- In rtnetlink_rcv_msg convert the capable(CAP_NET_ADMIN) check
  to ns_capable(net->user-ns, CAP_NET_ADMIN).  Allowing unprivileged
  users to make netlink calls to modify their local network
  namespace.

- In the rtnetlink doit methods add capable(CAP_NET_ADMIN) so
  that calls that are not safe for unprivileged users are still
  protected.

Later patches will remove the extra capable calls from methods
that are safe for unprivilged users.

Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric W. Biederman 2012-11-16 03:03:00 +00:00 • committed by David S. Miller
parent 464dc801c7
commit dfc47ef863
17 changed files with 102 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

6
net/decnet/dn_dev.c
View file

@ -573,6 +573,9 @@ static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
struct dn_ifaddr __rcu **ifap;
int err = -EINVAL;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
if (!net_eq(net, &init_net))
goto errout;
@ -614,6 +617,9 @@ static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
struct dn_ifaddr *ifa;
int err;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
if (!net_eq(net, &init_net))
return -EINVAL;