[35/74] Bluetooth: sco: fix information leak to userspace

[Greg KH]

2.6.32-longterm review patch.  If anyone has any objections, please let us know.

------------------

From: Vasiliy Kulikov <segoon@xxxxxxxxxxxx>

commit c4c896e1471aec3b004a693c689f60be3b17ac86 upstream.

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 <segoon@xxxxxxxxxxxx>
Signed-off-by: Gustavo F. Padovan <padovan@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 net/bluetooth/sco.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -700,6 +700,7 @@ static int sco_sock_getsockopt_old(struc
 			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);
 


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