Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6:
  net: don't allow CAP_NET_ADMIN to load non-netdev kernel modules

5 files changed, 16 insertions, 5 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index d971346b0340..71caf7a5e6c6 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2392,6 +2392,9 @@ extern int netdev_notice(const struct net_device *dev, const char *format, ...)
 extern int netdev_info(const struct net_device *dev, const char *format, ...)
         __attribute__ ((format (printf, 2, 3)));
 
+#define MODULE_ALIAS_NETDEV(device) \
+        MODULE_ALIAS("netdev-" device)
+
 #if defined(DEBUG)
 #define netdev_dbg(__dev, format, args...)                      \
         netdev_printk(KERN_DEBUG, __dev, format, ##args)
diff --git a/net/core/dev.c b/net/core/dev.c
index 8ae6631abcc2..6561021d22d1 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1114,13 +1114,21 @@ EXPORT_SYMBOL(netdev_bonding_change);
 void dev_load(struct net *net, const char *name)
 {
         struct net_device *dev;
+        int no_module;
 
         rcu_read_lock();
         dev = dev_get_by_name_rcu(net, name);
         rcu_read_unlock();
 
-        if (!dev && capable(CAP_NET_ADMIN))
-                request_module("%s", name);
+        no_module = !dev;
+        if (no_module && capable(CAP_NET_ADMIN))
+                no_module = request_module("netdev-%s", name);
+        if (no_module && capable(CAP_SYS_MODULE)) {
+                if (!request_module("%s", name))
+                        pr_err("Loading kernel module for a network device "
+"with CAP_SYS_MODULE (deprecated).  Use CAP_NET_ADMIN and alias netdev-%s "
+"instead\n", name);
+        }
 }
 EXPORT_SYMBOL(dev_load);
 
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 6613edfac28c..d1d0e2c256fc 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -1765,4 +1765,4 @@ module_exit(ipgre_fini);
 MODULE_LICENSE("GPL");
 MODULE_ALIAS_RTNL_LINK("gre");
 MODULE_ALIAS_RTNL_LINK("gretap");
-MODULE_ALIAS("gre0");
+MODULE_ALIAS_NETDEV("gre0");
diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index 988f52fba54a..a5f58e7cbb26 100644
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -913,4 +913,4 @@ static void __exit ipip_fini(void)
 module_init(ipip_init);
 module_exit(ipip_fini);
 MODULE_LICENSE("GPL");
-MODULE_ALIAS("tunl0");
+MODULE_ALIAS_NETDEV("tunl0");
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 8ce38f10a547..d2c16e10f650 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -1290,4 +1290,4 @@ static int __init sit_init(void)
 module_init(sit_init);
 module_exit(sit_cleanup);
 MODULE_LICENSE("GPL");
-MODULE_ALIAS("sit0");
+MODULE_ALIAS_NETDEV("sit0");