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authorDenis V. Lunev <den@openvz.org>2007-12-01 00:21:31 +1100
committerDavid S. Miller <davem@davemloft.net>2008-01-28 14:54:24 -0800
commitb854272b3c732316676e9128f7b9e6f1e1ff88b0 (patch)
treec90c74b9ec068453881f1173da4c57d6bb00a7d9 /net/ipv4
parentad5d20a63940fcfb40af76ba06148f36d5d0b433 (diff)
[NET]: Modify all rtnetlink methods to only work in the initial namespace (v2)
Before I can enable rtnetlink to work in all network namespaces I need to be certain that something won't break. So this patch deliberately disables all of the rtnletlink methods in everything except the initial network namespace. After the methods have been audited this extra check can be disabled. Changes from v1: - added IPv6 addrlabel protection Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/devinet.c12
-rw-r--r--net/ipv4/fib_frontend.c12
-rw-r--r--net/ipv4/route.c4
3 files changed, 28 insertions, 0 deletions
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index b42f74617ba..c0eb26a0d0b 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -441,6 +441,7 @@ struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix,
static int inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
{
+ struct net *net = skb->sk->sk_net;
struct nlattr *tb[IFA_MAX+1];
struct in_device *in_dev;
struct ifaddrmsg *ifm;
@@ -449,6 +450,9 @@ static int inet_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg
ASSERT_RTNL();
+ if (net != &init_net)
+ return -EINVAL;
+
err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv4_policy);
if (err < 0)
goto errout;
@@ -560,10 +564,14 @@ errout:
static int inet_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
{
+ struct net *net = skb->sk->sk_net;
struct in_ifaddr *ifa;
ASSERT_RTNL();
+ if (net != &init_net)
+ return -EINVAL;
+
ifa = rtm_to_ifaddr(nlh);
if (IS_ERR(ifa))
return PTR_ERR(ifa);
@@ -1174,12 +1182,16 @@ nla_put_failure:
static int inet_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
{
+ struct net *net = skb->sk->sk_net;
int idx, ip_idx;
struct net_device *dev;
struct in_device *in_dev;
struct in_ifaddr *ifa;
int s_ip_idx, s_idx = cb->args[0];
+ if (net != &init_net)
+ return 0;
+
s_ip_idx = ip_idx = cb->args[1];
idx = 0;
for_each_netdev(&init_net, dev) {
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 97abf934d18..e02aba5fa13 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -538,10 +538,14 @@ errout:
static int inet_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
{
+ struct net *net = skb->sk->sk_net;
struct fib_config cfg;
struct fib_table *tb;
int err;
+ if (net != &init_net)
+ return -EINVAL;
+
err = rtm_to_fib_config(skb, nlh, &cfg);
if (err < 0)
goto errout;
@@ -559,10 +563,14 @@ errout:
static int inet_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
{
+ struct net *net = skb->sk->sk_net;
struct fib_config cfg;
struct fib_table *tb;
int err;
+ if (net != &init_net)
+ return -EINVAL;
+
err = rtm_to_fib_config(skb, nlh, &cfg);
if (err < 0)
goto errout;
@@ -580,12 +588,16 @@ errout:
static int inet_dump_fib(struct sk_buff *skb, struct netlink_callback *cb)
{
+ struct net *net = skb->sk->sk_net;
unsigned int h, s_h;
unsigned int e = 0, s_e;
struct fib_table *tb;
struct hlist_node *node;
int dumped = 0;
+ if (net != &init_net)
+ return 0;
+
if (nlmsg_len(cb->nlh) >= sizeof(struct rtmsg) &&
((struct rtmsg *) nlmsg_data(cb->nlh))->rtm_flags & RTM_F_CLONED)
return ip_rt_dump(skb, cb);
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index a21021bf140..1d2839571d2 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2527,6 +2527,7 @@ nla_put_failure:
static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void *arg)
{
+ struct net *net = in_skb->sk->sk_net;
struct rtmsg *rtm;
struct nlattr *tb[RTA_MAX+1];
struct rtable *rt = NULL;
@@ -2536,6 +2537,9 @@ static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void
int err;
struct sk_buff *skb;
+ if (net != &init_net)
+ return -EINVAL;
+
err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv4_policy);
if (err < 0)
goto errout;