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Subject[PATCH 09/14] user ns: convert ipv6 to targeted capabilities
Date
From: Serge E. Hallyn <serge.hallyn@canonical.com>

Signed-off-by: Serge E. Hallyn <serge.hallyn@canonical.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
---
net/ipv6/addrconf.c | 4 ++--
net/ipv6/af_inet6.c | 6 ++++--
net/ipv6/datagram.c | 6 +++---
net/ipv6/ip6_flowlabel.c | 24 ++++++++++++++----------
net/ipv6/ip6_tunnel.c | 4 ++--
net/ipv6/ip6mr.c | 2 +-
net/ipv6/ipv6_sockglue.c | 7 ++++---
net/ipv6/netfilter/ip6_tables.c | 8 ++++----
net/ipv6/route.c | 2 +-
net/ipv6/sit.c | 10 +++++-----
10 files changed, 40 insertions(+), 33 deletions(-)
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index a06c53c..6b93e3b 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2228,7 +2228,7 @@ int addrconf_add_ifaddr(struct net *net, void __user *arg)
struct in6_ifreq ireq;
int err;

- if (!capable(CAP_NET_ADMIN))
+ if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
return -EPERM;

if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
@@ -2247,7 +2247,7 @@ int addrconf_del_ifaddr(struct net *net, void __user *arg)
struct in6_ifreq ireq;
int err;

- if (!capable(CAP_NET_ADMIN))
+ if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
return -EPERM;

if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 3b5669a..1854ffe 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -160,7 +160,8 @@ lookup_protocol:
}

err = -EPERM;
- if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW))
+ if (sock->type == SOCK_RAW && !kern &&
+ !ns_capable(net->user_ns, CAP_NET_RAW))
goto out_rcu_unlock;

sock->ops = answer->ops;
@@ -281,7 +282,8 @@ int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
return -EINVAL;

snum = ntohs(addr->sin6_port);
- if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
+ if (snum && snum < PROT_SOCK &&
+ !ns_capable(sock_net(sk)->user_ns, CAP_NET_BIND_SERVICE))
return -EACCES;

lock_sock(sk);
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index 1656033..7e38d8f 100644
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -694,7 +694,7 @@ int datagram_send_ctl(struct net *net,
err = -EINVAL;
goto exit_f;
}
- if (!capable(CAP_NET_RAW)) {
+ if (!ns_capable(net->user_ns, CAP_NET_RAW)) {
err = -EPERM;
goto exit_f;
}
@@ -714,7 +714,7 @@ int datagram_send_ctl(struct net *net,
err = -EINVAL;
goto exit_f;
}
- if (!capable(CAP_NET_RAW)) {
+ if (!ns_capable(net->user_ns, CAP_NET_RAW)) {
err = -EPERM;
goto exit_f;
}
@@ -739,7 +739,7 @@ int datagram_send_ctl(struct net *net,
err = -EINVAL;
goto exit_f;
}
- if (!capable(CAP_NET_RAW)) {
+ if (!ns_capable(net->user_ns, CAP_NET_RAW)) {
err = -EPERM;
goto exit_f;
}
diff --git a/net/ipv6/ip6_flowlabel.c b/net/ipv6/ip6_flowlabel.c
index f3caf1b..4726c02 100644
--- a/net/ipv6/ip6_flowlabel.c
+++ b/net/ipv6/ip6_flowlabel.c
@@ -294,21 +294,22 @@ struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions * opt_space,
return opt_space;
}

-static unsigned long check_linger(unsigned long ttl)
+static unsigned long check_linger(unsigned long ttl, struct user_namespace *ns)
{
if (ttl < FL_MIN_LINGER)
return FL_MIN_LINGER*HZ;
- if (ttl > FL_MAX_LINGER && !capable(CAP_NET_ADMIN))
+ if (ttl > FL_MAX_LINGER && !ns_capable(ns, CAP_NET_ADMIN))
return 0;
return ttl*HZ;
}

-static int fl6_renew(struct ip6_flowlabel *fl, unsigned long linger, unsigned long expires)
+static int fl6_renew(struct ip6_flowlabel *fl, unsigned long linger,
+ unsigned long expires, struct user_namespace *ns)
{
- linger = check_linger(linger);
+ linger = check_linger(linger, ns);
if (!linger)
return -EPERM;
- expires = check_linger(expires);
+ expires = check_linger(expires, ns);
if (!expires)
return -EPERM;
fl->lastuse = jiffies;
@@ -375,7 +376,7 @@ fl_create(struct net *net, struct in6_flowlabel_req *freq, char __user *optval,

fl->fl_net = hold_net(net);
fl->expires = jiffies;
- err = fl6_renew(fl, freq->flr_linger, freq->flr_expires);
+ err = fl6_renew(fl, freq->flr_linger, freq->flr_expires, net->user_ns);
if (err)
goto done;
fl->share = freq->flr_share;
@@ -425,7 +426,7 @@ static int mem_check(struct sock *sk)
if (room <= 0 ||
((count >= FL_MAX_PER_SOCK ||
(count > 0 && room < FL_MAX_SIZE/2) || room < FL_MAX_SIZE/4) &&
- !capable(CAP_NET_ADMIN)))
+ !ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)))
return -ENOBUFS;

return 0;
@@ -507,17 +508,20 @@ int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen)
read_lock_bh(&ip6_sk_fl_lock);
for (sfl = np->ipv6_fl_list; sfl; sfl = sfl->next) {
if (sfl->fl->label == freq.flr_label) {
- err = fl6_renew(sfl->fl, freq.flr_linger, freq.flr_expires);
+ err = fl6_renew(sfl->fl, freq.flr_linger, freq.flr_expires,
+ net->user_ns);
read_unlock_bh(&ip6_sk_fl_lock);
return err;
}
}
read_unlock_bh(&ip6_sk_fl_lock);

- if (freq.flr_share == IPV6_FL_S_NONE && capable(CAP_NET_ADMIN)) {
+ if (freq.flr_share == IPV6_FL_S_NONE &&
+ ns_capable(net->user_ns, CAP_NET_ADMIN)) {
fl = fl_lookup(net, freq.flr_label);
if (fl) {
- err = fl6_renew(fl, freq.flr_linger, freq.flr_expires);
+ err = fl6_renew(fl, freq.flr_linger, freq.flr_expires,
+ net->user_ns);
fl_release(fl);
return err;
}
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 36c2842..1a98c23 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -1269,7 +1269,7 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
case SIOCADDTUNNEL:
case SIOCCHGTUNNEL:
err = -EPERM;
- if (!capable(CAP_NET_ADMIN))
+ if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
break;
err = -EFAULT;
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof (p)))
@@ -1304,7 +1304,7 @@ ip6_tnl_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
break;
case SIOCDELTUNNEL:
err = -EPERM;
- if (!capable(CAP_NET_ADMIN))
+ if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
break;

if (dev == ip6n->fb_tnl_dev) {
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 705c828..1649ccd 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -1582,7 +1582,7 @@ int ip6_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, uns
return -ENOENT;

if (optname != MRT6_INIT) {
- if (sk != mrt->mroute6_sk && !capable(CAP_NET_ADMIN))
+ if (sk != mrt->mroute6_sk && !ns_capable(net->user_ns, CAP_NET_ADMIN))
return -EACCES;
}

diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 9cb191e..196b099 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -343,7 +343,7 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
break;

case IPV6_TRANSPARENT:
- if (!capable(CAP_NET_ADMIN)) {
+ if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) {
retv = -EPERM;
break;
}
@@ -381,7 +381,8 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,

/* hop-by-hop / destination options are privileged option */
retv = -EPERM;
- if (optname != IPV6_RTHDR && !capable(CAP_NET_RAW))
+ if (optname != IPV6_RTHDR &&
+ !ns_capable(net->user_ns, CAP_NET_RAW))
break;

opt = ipv6_renew_options(sk, np->opt, optname,
@@ -725,7 +726,7 @@ done:
case IPV6_IPSEC_POLICY:
case IPV6_XFRM_POLICY:
retv = -EPERM;
- if (!capable(CAP_NET_ADMIN))
+ if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
break;
retv = xfrm_user_policy(sk, optname, optval, optlen);
break;
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index 94874b0..7fce7d8 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -1869,7 +1869,7 @@ compat_do_ip6t_set_ctl(struct sock *sk, int cmd, void __user *user,
{
int ret;

- if (!capable(CAP_NET_ADMIN))
+ if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
return -EPERM;

switch (cmd) {
@@ -1984,7 +1984,7 @@ compat_do_ip6t_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
{
int ret;

- if (!capable(CAP_NET_ADMIN))
+ if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
return -EPERM;

switch (cmd) {
@@ -2006,7 +2006,7 @@ do_ip6t_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
{
int ret;

- if (!capable(CAP_NET_ADMIN))
+ if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
return -EPERM;

switch (cmd) {
@@ -2031,7 +2031,7 @@ do_ip6t_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
{
int ret;

- if (!capable(CAP_NET_ADMIN))
+ if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
return -EPERM;

switch (cmd) {
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index e8987da..2a64c67 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1929,7 +1929,7 @@ int ipv6_route_ioctl(struct net *net, unsigned int cmd, void __user *arg)
switch(cmd) {
case SIOCADDRT: /* Add a route */
case SIOCDELRT: /* Delete a route */
- if (!capable(CAP_NET_ADMIN))
+ if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
return -EPERM;
err = copy_from_user(&rtmsg, arg,
sizeof(struct in6_rtmsg));
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 07bf108..402e2a5 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -308,7 +308,7 @@ static int ipip6_tunnel_get_prl(struct ip_tunnel *t,
/* For simple GET or for root users,
* we try harder to allocate.
*/
- kp = (cmax <= 1 || capable(CAP_NET_ADMIN)) ?
+ kp = (cmax <= 1 || ns_capable(dev_net(t->dev)->user_ns, CAP_NET_ADMIN)) ?
kcalloc(cmax, sizeof(*kp), GFP_KERNEL) :
NULL;

@@ -926,7 +926,7 @@ ipip6_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
case SIOCADDTUNNEL:
case SIOCCHGTUNNEL:
err = -EPERM;
- if (!capable(CAP_NET_ADMIN))
+ if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
goto done;

err = -EFAULT;
@@ -985,7 +985,7 @@ ipip6_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)

case SIOCDELTUNNEL:
err = -EPERM;
- if (!capable(CAP_NET_ADMIN))
+ if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
goto done;

if (dev == sitn->fb_tunnel_dev) {
@@ -1018,7 +1018,7 @@ ipip6_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
case SIOCDELPRL:
case SIOCCHGPRL:
err = -EPERM;
- if (!capable(CAP_NET_ADMIN))
+ if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
goto done;
err = -EINVAL;
if (dev == sitn->fb_tunnel_dev)
@@ -1047,7 +1047,7 @@ ipip6_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
case SIOCCHG6RD:
case SIOCDEL6RD:
err = -EPERM;
- if (!capable(CAP_NET_ADMIN))
+ if (!ns_capable(dev_net(dev)->user_ns, CAP_NET_ADMIN))
goto done;

err = -EFAULT;
--
1.7.4.1


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