hysdn: fix writing outside the field on 64 bits

ifa_local is assumed to be unsigned long which lead to writing the address
at dev->dev_addr-2 instead of +2

noticed thanks to gcc:

drivers/isdn/hysdn/hysdn_net.c: In function `net_open':
drivers/isdn/hysdn/hysdn_net.c:91: warning: array subscript is below array bounds

Signed-off-by: Pascal Terjan <pterjan@mandriva.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/isdn/hysdn/hysdn_net.c b/drivers/isdn/hysdn/hysdn_net.c
index cfa8fa5e44ab..3f2a0a20c19b 100644
--- a/drivers/isdn/hysdn/hysdn_net.c
+++ b/drivers/isdn/hysdn/hysdn_net.c
@@ -83,12 +83,12 @@ net_open(struct net_device *dev)
 
         /* Fill in the MAC-level header (if not already set) */
         if (!card->mac_addr[0]) {
-                for (i = 0; i < ETH_ALEN - sizeof(unsigned long); i++)
+                for (i = 0; i < ETH_ALEN; i++)
                         dev->dev_addr[i] = 0xfc;
                 if ((in_dev = dev->ip_ptr) != NULL) {
                         struct in_ifaddr *ifa = in_dev->ifa_list;
                         if (ifa != NULL)
-                                memcpy(dev->dev_addr + (ETH_ALEN - sizeof(unsigned long)), &ifa->ifa_local, sizeof(unsigned long));
+                                memcpy(dev->dev_addr + (ETH_ALEN - sizeof(ifa->ifa_local)), &ifa->ifa_local, sizeof(ifa->ifa_local));
                 }
         } else
                 memcpy(dev->dev_addr, card->mac_addr, ETH_ALEN);