From dfc47ef8639facd77210e74be831943c2fdd9c74 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Fri, 16 Nov 2012 03:03:00 +0000 Subject: net: Push capable(CAP_NET_ADMIN) into the rtnl methods - 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 Signed-off-by: "Eric W. Biederman" Signed-off-by: David S. Miller --- net/ipv4/devinet.c | 6 ++++++ net/ipv4/fib_frontend.c | 6 ++++++ 2 files changed, 12 insertions(+) (limited to 'net/ipv4') diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c index 6e06e924ed99..417093538916 100644 --- a/net/ipv4/devinet.c +++ b/net/ipv4/devinet.c @@ -539,6 +539,9 @@ static int inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg ASSERT_RTNL(); + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv4_policy); if (err < 0) goto errout; @@ -646,6 +649,9 @@ static int inet_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg ASSERT_RTNL(); + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + ifa = rtm_to_ifaddr(net, nlh); if (IS_ERR(ifa)) return PTR_ERR(ifa); diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c index 825c608826de..bce4541c6784 100644 --- a/net/ipv4/fib_frontend.c +++ b/net/ipv4/fib_frontend.c @@ -613,6 +613,9 @@ static int inet_rtm_delroute(struct sk_buff *skb, struct nlmsghdr *nlh, void *ar struct fib_table *tb; int err; + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + err = rtm_to_fib_config(net, skb, nlh, &cfg); if (err < 0) goto errout; @@ -635,6 +638,9 @@ static int inet_rtm_newroute(struct sk_buff *skb, struct nlmsghdr *nlh, void *ar struct fib_table *tb; int err; + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + err = rtm_to_fib_config(net, skb, nlh, &cfg); if (err < 0) goto errout; -- cgit v1.2.3