bluetooth information leak: https://lkml.org/lkml/2011/2/14/49
>From c4c896e1471aec3b004a693c689f60be3b17ac86 Mon Sep 17 00:00:00 2001 From: Vasiliy Kulikov <[email protected]> Date: Mon, 14 Feb 2011 13:54:26 +0300 Subject: [PATCH] Bluetooth: sco: fix information leak to userspace
struct sco_conninfo has one padding byte in the end. Local variable cinfo of type sco_conninfo is copied to userspace with this uninizialized one byte, leading to old stack contents leak. Signed-off-by: Vasiliy Kulikov <[email protected]> Signed-off-by: Gustavo F. Padovan <[email protected]> --- net/bluetooth/sco.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c index 960c6d1..926ed39 100644 --- a/net/bluetooth/sco.c +++ b/net/bluetooth/sco.c @@ -703,6 +703,7 @@ static int sco_sock_getsockopt_old(struct socket *sock, int optname, char __user break; } + memset(&cinfo, 0, sizeof(cinfo)); cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle; memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3); -- 1.7.4.2
_______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
