Bluetooth: bnep: fix information leak to userland

Structure bnep_conninfo is copied to userland with the field "device"
that has the last elements unitialized.  It leads to leaking of
contents of kernel stack memory.
Signed-off-by: NVasiliy Kulikov <segooon@gmail.com>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NGustavo F. Padovan <padovan@profusion.mobi>

net/bluetooth/bnep/core.c

@@ -648,6 +648,7 @@ int bnep_del_connection(struct bnep_conndel_req *req)
 
 static void __bnep_copy_ci(struct bnep_conninfo *ci, struct bnep_session *s)
 {
+	memset(ci, 0, sizeof(*ci));
 	memcpy(ci->dst, s->eh.h_source, ETH_ALEN);
 	strcpy(ci->device, s->dev->name);
 	ci->flags = s->flags;