[Xen-devel] [PATCH v2 16/18] xsm, argo: notify: don't describe rings that cannot be sent to

[Christopher Clark <christopher.w.clark@xxxxxxxxx>]

Signed-off-by: Christopher Clark <christopher.clark6@xxxxxxxxxxxxxx>
---
 xen/common/argo.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/xen/common/argo.c b/xen/common/argo.c
index 1f16872..921aaf3 100644
--- a/xen/common/argo.c
+++ b/xen/common/argo.c
@@ -1115,6 +1115,17 @@ argo_fill_ring_data(const struct domain *src_d,
 
     if ( dst_d && dst_d->argo )
     {
+        /*
+         * Don't supply information about rings that a guest is not
+         * allowed to send to.
+         */
+        ret = xsm_argo_send(src_d, dst_d);
+        if ( ret )
+        {
+            put_domain(dst_d);
+            return ret;
+        }
+
         read_lock(&dst_d->argo->lock);
 
         ring_info = argo_ring_find_info_by_match(dst_d, ent.ring.port, src_id,
-- 
2.7.4


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