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/ipv6/addrconf.c | 6 ++++++ net/ipv6/addrlabel.c | 3 +++ net/ipv6/route.c | 6 ++++++ 3 files changed, 15 insertions(+) (limited to 'net/ipv6') diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index b24b4de5cd26..e21bdb92565d 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -3514,6 +3514,9 @@ 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; @@ -3584,6 +3587,9 @@ 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 ff76eecfd622..b106f80be0c5 100644 --- a/net/ipv6/addrlabel.c +++ b/net/ipv6/addrlabel.c @@ -425,6 +425,9 @@ 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 021a48e8a5e2..c6215e2b9d7f 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -2446,6 +2446,9 @@ 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; @@ -2461,6 +2464,9 @@ 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; -- cgit v1.2.3-70-g09d2