This commit was manufactured by cvs2svn to create tag

[linux-2.6.git] / net / decnet / dn_dev.c

diff --git a/net/decnet/dn_dev.c b/net/decnet/dn_dev.c
index bc27c4e..6941da9 100644 (file)
--- a/net/decnet/dn_dev.c
+++ b/net/decnet/dn_dev.c
@@ -1294,35 +1294,43 @@ int unregister_dnaddr_notifier(struct notifier_block *nb)
  * it as a compile time option. Probably you should use the
  * rtnetlink interface instead.
  */
-int dnet_gifconf(struct net_device *dev, char *buf, int len)
+int dnet_gifconf(struct net_device *dev, char __user *buf, int len)
 {
        struct dn_dev *dn_db = (struct dn_dev *)dev->dn_ptr;
        struct dn_ifaddr *ifa;
-       struct ifreq *ifr = (struct ifreq *)buf;
+       char buffer[DN_IFREQ_SIZE];
+       struct ifreq *ifr = (struct ifreq *)buffer;
+       struct sockaddr_dn *addr = (struct sockaddr_dn *)&ifr->ifr_addr;
        int done = 0;
 
        if ((dn_db == NULL) || ((ifa = dn_db->ifa_list) == NULL))
                return 0;
 
        for(; ifa; ifa = ifa->ifa_next) {
-               if (!ifr) {
+               if (!buf) {
                        done += sizeof(DN_IFREQ_SIZE);
                        continue;
                }
                if (len < DN_IFREQ_SIZE)
                        return done;
-               memset(ifr, 0, DN_IFREQ_SIZE);
+               memset(buffer, 0, DN_IFREQ_SIZE);
 
                if (ifa->ifa_label)
                        strcpy(ifr->ifr_name, ifa->ifa_label);
                else
                        strcpy(ifr->ifr_name, dev->name);
 
-               (*(struct sockaddr_dn *) &ifr->ifr_addr).sdn_family = AF_DECnet;
-               (*(struct sockaddr_dn *) &ifr->ifr_addr).sdn_add.a_len = 2;
-               (*(dn_address *)(*(struct sockaddr_dn *) &ifr->ifr_addr).sdn_add.a_addr) = ifa->ifa_local;
+               addr->sdn_family = AF_DECnet;
+               addr->sdn_add.a_len = 2;
+               memcpy(addr->sdn_add.a_addr, &ifa->ifa_local,
+                       sizeof(dn_address));
+
+               if (copy_to_user(buf, buffer, DN_IFREQ_SIZE)) {
+                       done = -EFAULT;
+                       break;
+               }
 
-               ifr = (struct ifreq *)((char *)ifr + DN_IFREQ_SIZE);
+               buf  += DN_IFREQ_SIZE;
                len  -= DN_IFREQ_SIZE;
                done += DN_IFREQ_SIZE;
        }