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authorEric W. Biederman <ebiederm@xmission.com>2007-10-08 23:24:22 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-10 16:49:07 -0700
commit1b8d7ae42d02e483ad94035cca851e4f7fbecb40 (patch)
tree81f8cc0ee49ef99cc67dfed3dc7b7ecb510abf8b /net/netrom
parent457c4cbc5a3dde259d2a1f15d5f9785290397267 (diff)
downloadkernel-1b8d7ae42d02e483ad94035cca851e4f7fbecb40.tar.gz
[NET]: Make socket creation namespace safe.
This patch passes in the namespace a new socket should be created in and has the socket code do the appropriate reference counting. By virtue of this all socket create methods are touched. In addition the socket create methods are modified so that they will fail if you attempt to create a socket in a non-default network namespace. Failing if we attempt to create a socket outside of the default network namespace ensures that as we incrementally make the network stack network namespace aware we will not export functionality that someone has not audited and made certain is network namespace safe. Allowing us to partially enable network namespaces before all of the exotic protocols are supported. Any protocol layers I have missed will fail to compile because I now pass an extra parameter into the socket creation code. [ Integrated AF_IUCV build fixes from Andrew Morton... -DaveM ] Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netrom')
-rw-r--r--net/netrom/af_netrom.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c
index 15c8a92bd719..e969d1bc765c 100644
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -409,15 +409,18 @@ static struct proto nr_proto = {
.obj_size = sizeof(struct nr_sock),
};
-static int nr_create(struct socket *sock, int protocol)
+static int nr_create(struct net *net, struct socket *sock, int protocol)
{
struct sock *sk;
struct nr_sock *nr;
+ if (net != &init_net)
+ return -EAFNOSUPPORT;
+
if (sock->type != SOCK_SEQPACKET || protocol != 0)
return -ESOCKTNOSUPPORT;
- if ((sk = sk_alloc(PF_NETROM, GFP_ATOMIC, &nr_proto, 1)) == NULL)
+ if ((sk = sk_alloc(net, PF_NETROM, GFP_ATOMIC, &nr_proto, 1)) == NULL)
return -ENOMEM;
nr = nr_sk(sk);
@@ -459,7 +462,7 @@ static struct sock *nr_make_new(struct sock *osk)
if (osk->sk_type != SOCK_SEQPACKET)
return NULL;
- if ((sk = sk_alloc(PF_NETROM, GFP_ATOMIC, osk->sk_prot, 1)) == NULL)
+ if ((sk = sk_alloc(osk->sk_net, PF_NETROM, GFP_ATOMIC, osk->sk_prot, 1)) == NULL)
return NULL;
nr = nr_sk(sk);