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[NET]: Modify all rtnetlink methods to only work in the initial namespace (v2)

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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>
This commit is contained in:
Denis V. Lunev
2007-12-01 00:21:31 +11:00
committed by David S. Miller
parent ad5d20a639
commit b854272b3c
18 changed files with 218 additions and 1 deletions
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10
net/sched/act_api.c
View File

@@ -18,6 +18,8 @@
#include <linux/skbuff.h>
#include <linux/init.h>
#include <linux/kmod.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <net/sch_generic.h>
#include <net/act_api.h>
#include <net/netlink.h>
@@ -924,10 +926,14 @@ done:
static int tc_ctl_action(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
{
struct net *net = skb->sk->sk_net;
struct rtattr **tca = arg;
u32 pid = skb ? NETLINK_CB(skb).pid : 0;
int ret = 0, ovr = 0;
if (net != &init_net)
return -EINVAL;
if (tca[TCA_ACT_TAB-1] == NULL) {
printk("tc_ctl_action: received NO action attribs\n");
return -EINVAL;
@@ -997,6 +1003,7 @@ find_dump_kind(struct nlmsghdr *n)
static int
tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb)
{
struct net *net = skb->sk->sk_net;
struct nlmsghdr *nlh;
unsigned char *b = skb_tail_pointer(skb);
struct rtattr *x;
@@ -1006,6 +1013,9 @@ tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb)
struct tcamsg *t = (struct tcamsg *) NLMSG_DATA(cb->nlh);
struct rtattr *kind = find_dump_kind(cb->nlh);
if (net != &init_net)
return 0;
if (kind == NULL) {
printk("tc_dump_action: action bad kind\n");
return 0;