diff options
| author |   Eric W. Biederman <ebiederm@xmission.com> | 2012-11-16 03:03:12 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2012-11-18 20:33:37 -0500 |
| commit | 3594698a1fb8e5ae60a92c72ce9ca280256939a7 (patch) | |
| tree | 54360b8a85136ebfeb10f76cfa207a23fb6035e9 /net/ipv4/af_inet.c | |
| parent | net: Enable a userns root rtnl calls that are safe for unprivilged users (diff) | |
| download | linux-dev-3594698a1fb8e5ae60a92c72ce9ca280256939a7.tar.xz linux-dev-3594698a1fb8e5ae60a92c72ce9ca280256939a7.zip | |
net: Make CAP_NET_BIND_SERVICE per user namespace
Allow privileged users in any user namespace to bind to
privileged sockets in network namespaces they control.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/af_inet.c')
| -rw-r--r-- | net/ipv4/af_inet.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c index 4f5f22061e1c..24b384b7903e 100644 --- a/net/ipv4/af_inet.c +++ b/net/ipv4/af_inet.c @@ -474,6 +474,7 @@ int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) struct sockaddr_in *addr = (struct sockaddr_in *)uaddr; struct sock *sk = sock->sk; struct inet_sock *inet = inet_sk(sk); + struct net *net = sock_net(sk); unsigned short snum; int chk_addr_ret; int err; @@ -497,7 +498,7 @@ int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) goto out; } - chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr); + chk_addr_ret = inet_addr_type(net, addr->sin_addr.s_addr); /* Not specified by any standard per-se, however it breaks too * many applications when removed. It is unfortunate since @@ -517,7 +518,8 @@ int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) snum = ntohs(addr->sin_port); err = -EACCES; - if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) + if (snum && snum < PROT_SOCK && + !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) goto out; /* We keep a pair of addresses. rcv_saddr is the one |