From d77e3459f7edf03567024ad9442dace4bcb81b9c Mon Sep 17 00:00:00 2001 From: Filip Palian Date: Thu, 12 May 2011 19:32:46 +0200 Subject: [PATCH] Bluetooth: l2cap and rfcomm: fix 1 byte infoleak to userspace. 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(+) diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c index 8d1c4a93eee9..514aa8fbbee2 100644 --- a/net/bluetooth/l2cap.c +++ b/net/bluetooth/l2cap.c @@ -1886,6 +1886,7 @@ static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __us 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); diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c index 30a36499ee77..1ae3f80fe472 100644 --- a/net/bluetooth/rfcomm/sock.c +++ b/net/bluetooth/rfcomm/sock.c @@ -878,6 +878,7 @@ static int rfcomm_sock_getsockopt_old(struct socket *sock, int optname, char __u 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); -- 2.39.2