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Diffstat (limited to 'net/ipv4/devinet.c')
-rw-r--r--net/ipv4/devinet.c36
1 files changed, 27 insertions, 9 deletions
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index e9449376b58e..214882e7d6de 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -180,11 +180,12 @@ static BLOCKING_NOTIFIER_HEAD(inetaddr_chain);
static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap,
int destroy);
#ifdef CONFIG_SYSCTL
-static void devinet_sysctl_register(struct in_device *idev);
+static int devinet_sysctl_register(struct in_device *idev);
static void devinet_sysctl_unregister(struct in_device *idev);
#else
-static void devinet_sysctl_register(struct in_device *idev)
+static int devinet_sysctl_register(struct in_device *idev)
{
+ return 0;
}
static void devinet_sysctl_unregister(struct in_device *idev)
{
@@ -232,6 +233,7 @@ EXPORT_SYMBOL(in_dev_finish_destroy);
static struct in_device *inetdev_init(struct net_device *dev)
{
struct in_device *in_dev;
+ int err = -ENOMEM;
ASSERT_RTNL();
@@ -252,7 +254,13 @@ static struct in_device *inetdev_init(struct net_device *dev)
/* Account for reference dev->ip_ptr (below) */
in_dev_hold(in_dev);
- devinet_sysctl_register(in_dev);
+ err = devinet_sysctl_register(in_dev);
+ if (err) {
+ in_dev->dead = 1;
+ in_dev_put(in_dev);
+ in_dev = NULL;
+ goto out;
+ }
ip_mc_init_dev(in_dev);
if (dev->flags & IFF_UP)
ip_mc_up(in_dev);
@@ -260,7 +268,7 @@ static struct in_device *inetdev_init(struct net_device *dev)
/* we can receive as soon as ip_ptr is set -- do this last */
rcu_assign_pointer(dev->ip_ptr, in_dev);
out:
- return in_dev;
+ return in_dev ?: ERR_PTR(err);
out_kfree:
kfree(in_dev);
in_dev = NULL;
@@ -1347,8 +1355,8 @@ static int inetdev_event(struct notifier_block *this, unsigned long event,
if (!in_dev) {
if (event == NETDEV_REGISTER) {
in_dev = inetdev_init(dev);
- if (!in_dev)
- return notifier_from_errno(-ENOMEM);
+ if (IS_ERR(in_dev))
+ return notifier_from_errno(PTR_ERR(in_dev));
if (dev->flags & IFF_LOOPBACK) {
IN_DEV_CONF_SET(in_dev, NOXFRM, 1);
IN_DEV_CONF_SET(in_dev, NOPOLICY, 1);
@@ -2182,11 +2190,21 @@ static void __devinet_sysctl_unregister(struct ipv4_devconf *cnf)
kfree(t);
}
-static void devinet_sysctl_register(struct in_device *idev)
+static int devinet_sysctl_register(struct in_device *idev)
{
- neigh_sysctl_register(idev->dev, idev->arp_parms, NULL);
- __devinet_sysctl_register(dev_net(idev->dev), idev->dev->name,
+ int err;
+
+ if (!sysctl_dev_name_is_allowed(idev->dev->name))
+ return -EINVAL;
+
+ err = neigh_sysctl_register(idev->dev, idev->arp_parms, NULL);
+ if (err)
+ return err;
+ err = __devinet_sysctl_register(dev_net(idev->dev), idev->dev->name,
&idev->cnf);
+ if (err)
+ neigh_sysctl_unregister(idev->arp_parms);
+ return err;
}
static void devinet_sysctl_unregister(struct in_device *idev)