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sit: use the right netns in ioctl handler

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Because the netdevice may be in another netns than the i/o netns, we should
use the i/o netns instead of dev_net(dev).

Note that netdev_priv(dev) cannot bu NULL, hence we can remove these useless
checks.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nicolas Dichtel 2014-04-16 11:19:33 +02:00 committed by David S. Miller
parent 8c923ce219
commit 9aad77c3b5
1 changed files with 4 additions and 13 deletions
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17
net/ipv6/sit.c
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@ -1127,8 +1127,8 @@ ipip6_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
int err = 0;
struct ip_tunnel_parm p;
struct ip_tunnel_prl prl;
struct ip_tunnel *t;
struct net *net = dev_net(dev);
struct ip_tunnel *t = netdev_priv(dev);
struct net *net = t->net;
struct sit_net *sitn = net_generic(net, sit_net_id);
#ifdef CONFIG_IPV6_SIT_6RD
struct ip_tunnel_6rd ip6rd;
@ -1139,16 +1139,15 @@ ipip6_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
#ifdef CONFIG_IPV6_SIT_6RD
case SIOCGET6RD:
#endif
t = NULL;
if (dev == sitn->fb_tunnel_dev) {
if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) {
err = -EFAULT;
break;
}
t = ipip6_tunnel_locate(net, &p, 0);
if (t == NULL)
t = netdev_priv(dev);
}
if (t == NULL)
t = netdev_priv(dev);
err = -EFAULT;
if (cmd == SIOCGETTUNNEL) {
@ -1244,9 +1243,6 @@ ipip6_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
err = -EINVAL;
if (dev == sitn->fb_tunnel_dev)
goto done;
err = -ENOENT;
if (!(t = netdev_priv(dev)))
goto done;
err = ipip6_tunnel_get_prl(t, ifr->ifr_ifru.ifru_data);
break;
@ -1262,9 +1258,6 @@ ipip6_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
err = -EFAULT;
if (copy_from_user(&prl, ifr->ifr_ifru.ifru_data, sizeof(prl)))
goto done;
err = -ENOENT;
if (!(t = netdev_priv(dev)))
goto done;
switch (cmd) {
case SIOCDELPRL:
@ -1292,8 +1285,6 @@ ipip6_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd)
sizeof(ip6rd)))
goto done;
t = netdev_priv(dev);
if (cmd != SIOCDEL6RD) {
err = ipip6_tunnel_update_6rd(t, &ip6rd);
if (err < 0)