From 1b8d7ae42d02e483ad94035cca851e4f7fbecb40 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Mon, 8 Oct 2007 23:24:22 -0700 Subject: [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 Signed-off-by: David S. Miller --- net/ax25/af_ax25.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'net/ax25') diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c index 1d71f85680b..def6c42ad16 100644 --- a/net/ax25/af_ax25.c +++ b/net/ax25/af_ax25.c @@ -780,11 +780,14 @@ static struct proto ax25_proto = { .obj_size = sizeof(struct sock), }; -static int ax25_create(struct socket *sock, int protocol) +static int ax25_create(struct net *net, struct socket *sock, int protocol) { struct sock *sk; ax25_cb *ax25; + if (net != &init_net) + return -EAFNOSUPPORT; + switch (sock->type) { case SOCK_DGRAM: if (protocol == 0 || protocol == PF_AX25) @@ -830,7 +833,7 @@ static int ax25_create(struct socket *sock, int protocol) return -ESOCKTNOSUPPORT; } - if ((sk = sk_alloc(PF_AX25, GFP_ATOMIC, &ax25_proto, 1)) == NULL) + if ((sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, &ax25_proto, 1)) == NULL) return -ENOMEM; ax25 = sk->sk_protinfo = ax25_create_cb(); @@ -855,7 +858,7 @@ struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev) struct sock *sk; ax25_cb *ax25, *oax25; - if ((sk = sk_alloc(PF_AX25, GFP_ATOMIC, osk->sk_prot, 1)) == NULL) + if ((sk = sk_alloc(osk->sk_net, PF_AX25, GFP_ATOMIC, osk->sk_prot, 1)) == NULL) return NULL; if ((ax25 = ax25_create_cb()) == NULL) { -- cgit v1.2.3-70-g09d2