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| author | Eric W. Biederman <ebiederm@xmission.com> | 2012-11-16 03:03:00 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-11-18 20:32:44 -0500 |
| commit | dfc47ef8639facd77210e74be831943c2fdd9c74 (patch) | |
| tree | 5c7e9f93a999bf1d38b216af346ce2159e5f18ec /net/sched | |
| parent | 464dc801c76aa0db88e16e8f5f47c6879858b9b2 (diff) | |
| download | lwn-dfc47ef8639facd77210e74be831943c2fdd9c74.tar.gz lwn-dfc47ef8639facd77210e74be831943c2fdd9c74.zip | |
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 <serge.hallyn@canonical.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched')
| -rw-r--r-- | net/sched/act_api.c | 3 | ||||
| -rw-r--r-- | net/sched/cls_api.c | 2 | ||||
| -rw-r--r-- | net/sched/sch_api.c | 9 |
3 files changed, 14 insertions, 0 deletions
diff --git a/net/sched/act_api.c b/net/sched/act_api.c index 102761d294cb..65d240cbf74b 100644 --- a/net/sched/act_api.c +++ b/net/sched/act_api.c @@ -987,6 +987,9 @@ static int tc_ctl_action(struct sk_buff *skb, struct nlmsghdr *n, void *arg) u32 portid = skb ? NETLINK_CB(skb).portid : 0; int ret = 0, ovr = 0; + if ((n->nlmsg_type != RTM_GETACTION) && !capable(CAP_NET_ADMIN)) + return -EPERM; + ret = nlmsg_parse(n, sizeof(struct tcamsg), tca, TCA_ACT_MAX, NULL); if (ret < 0) return ret; diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c index 7ae02892437c..ff55ed6c49b2 100644 --- a/net/sched/cls_api.c +++ b/net/sched/cls_api.c @@ -139,6 +139,8 @@ static int tc_ctl_tfilter(struct sk_buff *skb, struct nlmsghdr *n, void *arg) int err; int tp_created = 0; + if ((n->nlmsg_type != RTM_GETTFILTER) && !capable(CAP_NET_ADMIN)) + return -EPERM; replay: t = nlmsg_data(n); protocol = TC_H_MIN(t->tcm_info); diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c index 13cc744a2498..4799c4840c1a 100644 --- a/net/sched/sch_api.c +++ b/net/sched/sch_api.c @@ -980,6 +980,9 @@ static int tc_get_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg) struct Qdisc *p = NULL; int err; + if ((n->nlmsg_type != RTM_GETQDISC) && !capable(CAP_NET_ADMIN)) + return -EPERM; + dev = __dev_get_by_index(net, tcm->tcm_ifindex); if (!dev) return -ENODEV; @@ -1043,6 +1046,9 @@ static int tc_modify_qdisc(struct sk_buff *skb, struct nlmsghdr *n, void *arg) struct Qdisc *q, *p; int err; + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + replay: /* Reinit, just in case something touches this. */ tcm = nlmsg_data(n); @@ -1379,6 +1385,9 @@ static int tc_ctl_tclass(struct sk_buff *skb, struct nlmsghdr *n, void *arg) u32 qid = TC_H_MAJ(clid); int err; + if ((n->nlmsg_type != RTM_GETTCLASS) && !capable(CAP_NET_ADMIN)) + return -EPERM; + dev = __dev_get_by_index(net, tcm->tcm_ifindex); if (!dev) return -ENODEV; |