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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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6
net/can/gw.c
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@ -751,6 +751,9 @@ static int cgw_create_job(struct sk_buff *skb, struct nlmsghdr *nlh,
struct cgw_job *gwj;
int err = 0;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
if (nlmsg_len(nlh) < sizeof(*r))
return -EINVAL;
@ -839,6 +842,9 @@ static int cgw_remove_job(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
struct can_can_gw ccgw;
int err = 0;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
if (nlmsg_len(nlh) < sizeof(*r))
return -EINVAL;