From 3c6f27bf33052ea6ba9d82369fb460726fb779c0 Mon Sep 17 00:00:00 2001
From: Dan Rosenberg <drosenberg@vsecurity.com>
Date: Tue, 23 Nov 2010 11:02:13 +0000
Subject: [PATCH] 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>
---
 net/decnet/af_decnet.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/decnet/af_decnet.c b/net/decnet/af_decnet.c
index a76b78de679f..6f97268ed85f 100644
--- 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;
-- 
2.30.2