From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-Id: <20111102221459.470825385@clark.kroah.org> Date: Wed, 02 Nov 2011 15:15:08 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Filip Palian , Marcel Holtmann , "Gustavo F. Padovan" Subject: [102/107] Bluetooth: l2cap and rfcomm: fix 1 byte infoleak to userspace. In-Reply-To: <20111102221600.GA26650@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: 2.6.32-longterm review patch. If anyone has any objections, please let us know. ------------------ From: Filip Palian commit 8d03e971cf403305217b8e62db3a2e5ad2d6263f upstream. Structures "l2cap_conninfo" and "rfcomm_conninfo" have one padding byte each. This byte in "cinfo" is copied to userspace uninitialized. Signed-off-by: Filip Palian Acked-by: Marcel Holtmann Signed-off-by: Gustavo F. Padovan Signed-off-by: Greg Kroah-Hartman --- net/bluetooth/l2cap.c | 1 + net/bluetooth/rfcomm/sock.c | 1 + 2 files changed, 2 insertions(+) --- a/net/bluetooth/l2cap.c +++ b/net/bluetooth/l2cap.c @@ -1886,6 +1886,7 @@ static int l2cap_sock_getsockopt_old(str break; } + memset(&cinfo, 0, sizeof(cinfo)); cinfo.hci_handle = l2cap_pi(sk)->conn->hcon->handle; memcpy(cinfo.dev_class, l2cap_pi(sk)->conn->hcon->dev_class, 3); --- a/net/bluetooth/rfcomm/sock.c +++ b/net/bluetooth/rfcomm/sock.c @@ -878,6 +878,7 @@ static int rfcomm_sock_getsockopt_old(st l2cap_sk = rfcomm_pi(sk)->dlc->session->sock->sk; + memset(&cinfo, 0, sizeof(cinfo)); cinfo.hci_handle = l2cap_pi(l2cap_sk)->conn->hcon->handle; memcpy(cinfo.dev_class, l2cap_pi(l2cap_sk)->conn->hcon->dev_class, 3);