From 8d03e971cf403305217b8e62db3a2e5ad2d6263f Mon Sep 17 00:00:00 2001 From: Filip Palian <s3810@pjwstk.edu.pl> Date: Thu, 12 May 2011 19:32:46 +0200 Subject: [PATCH] Bluetooth: l2cap and rfcomm: fix 1 byte infoleak to userspace. 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 <filip.palian@pjwstk.edu.pl> Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> --- net/bluetooth/l2cap_sock.c | 1 + net/bluetooth/rfcomm/sock.c | 1 + 2 files changed, 2 insertions(+) diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c index 18dc9888d8c28..8248303f44e89 100644 --- a/net/bluetooth/l2cap_sock.c +++ b/net/bluetooth/l2cap_sock.c @@ -413,6 +413,7 @@ static int l2cap_sock_getsockopt_old(struct socket *sock, int optname, char __us break; } + memset(&cinfo, 0, sizeof(cinfo)); cinfo.hci_handle = chan->conn->hcon->handle; memcpy(cinfo.dev_class, chan->conn->hcon->dev_class, 3); diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c index 386cfaffd4b75..1b10727ce523e 100644 --- a/net/bluetooth/rfcomm/sock.c +++ b/net/bluetooth/rfcomm/sock.c @@ -788,6 +788,7 @@ 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 = conn->hcon->handle; memcpy(cinfo.dev_class, conn->hcon->dev_class, 3); -- 2.39.5