commit de74e92aa8a44d0b80a53601dc4f6dd6afcb8453
author danborkmann@iogearbox.net <danborkmann@iogearbox.net> Sun Jun 10 08:59:28 2012 +0000
committer David S. Miller <davem@davemloft.net> Mon Jun 11 16:51:51 2012 -0700
tree fa880b187e38df3499e490b78f435e2c952c11c9
parent 55afabaa0df0dd139c8796a71beb43d1216fbe43

af_packet: use sizeof instead of constant in spkt_device

This small patch removes access to the last element of the spkt_device
array through a constant. Instead, it is accessed by sizeof() to respect
possible changes in if_packet.h.

Signed-off-by: Daniel Borkmann <daniel.borkmann@tik.ee.ethz.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/packet/af_packet.c

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 71ac655..8a10d5b 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -1475,7 +1475,7 @@
 	 *	Find the device first to size check it
 	 */
 
-	saddr->spkt_device[13] = 0;
+	saddr->spkt_device[sizeof(saddr->spkt_device) - 1] = 0;
 retry:
 	rcu_read_lock();
 	dev = dev_get_by_name_rcu(sock_net(sk), saddr->spkt_device);