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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 <[email protected]>
Signed-off-by: "Eric W. Biederman" <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Eric W. Biederman 2012-11-16 03:03:00 +00:00 • committed by David S. Miller
commit dfc47ef863
17 changed files with 102 additions and 1 deletions
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3
net/bridge/br_netlink.c
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@ -240,6 +240,9 @@ int br_setlink(struct net_device *dev, struct nlmsghdr *nlh)
struct nlattr *tb[IFLA_BRPORT_MAX];
int err;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
ifm = nlmsg_data(nlh);
protinfo = nlmsg_find_attr(nlh, sizeof(*ifm), IFLA_PROTINFO);