linux-kernel - [PATCH] bluetooth: bnep: fix information leak to userland

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Message-Id: <1288448782-5582-1-git-send-email-segooon@gmail.com>
Date:	Sat, 30 Oct 2010 18:26:21 +0400
From:	Vasiliy Kulikov <segooon@...il.com>
To:	kernel-janitors@...r.kernel.org
Cc:	Marcel Holtmann <marcel@...tmann.org>,
	"Gustavo F. Padovan" <padovan@...fusion.mobi>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Thadeu Lima de Souza Cascardo <cascardo@...oscopio.com>,
	Tejun Heo <tj@...nel.org>, Jiri Kosina <jkosina@...e.cz>,
	linux-bluetooth@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] bluetooth: bnep: fix information leak to userland

Structure bnep_conninfo is copied to userland with the field "device"
that has the last elements unitialized.  It leads to leaking of
contents of kernel stack memory.

Signed-off-by: Vasiliy Kulikov <segooon@...il.com>
---
 Compile tested.

 net/bluetooth/bnep/core.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/net/bluetooth/bnep/core.c b/net/bluetooth/bnep/core.c
index f10b41f..5868597 100644
--- a/net/bluetooth/bnep/core.c
+++ b/net/bluetooth/bnep/core.c
@@ -648,6 +648,7 @@ int bnep_del_connection(struct bnep_conndel_req *req)
 
 static void __bnep_copy_ci(struct bnep_conninfo *ci, struct bnep_session *s)
 {
+	memset(ci, 0, sizeof(*ci));
 	memcpy(ci->dst, s->eh.h_source, ETH_ALEN);
 	strcpy(ci->device, s->dev->name);
 	ci->flags = s->flags;
-- 
1.7.0.4

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