DECnet: don't leak uninitialized stack byte

A single uninitialized padding byte is leaked to userspace. Signed-off-by: Dan Rosenberg <drosenberg@vsecurity.com> CC: stable <stable@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
xiaoqiangnk · Nov 28, 2010 · 3c6f27b · 3c6f27b
1 parent 462ca99
commit 3c6f27b
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/net/decnet/af_decnet.c b/net/decnet/af_decnet.c
@@ -1556,6 +1556,8 @@ static int __dn_getsockopt(struct socket *sock, int level,int optname, char __us
 			if (r_len > sizeof(struct linkinfo_dn))
 				r_len = sizeof(struct linkinfo_dn);
 
+			memset(&link, 0, sizeof(link));
+
 			switch(sock->state) {
 				case SS_CONNECTING:
 					link.idn_linkstate = LL_CONNECTING;